NZ545133A - Modafinil compositions - Google Patents

Abstract

Disclosed is a co-crystal comprising modafinil and a co-crystal former selected from the group consisting of: malonic acid, glycolic acid, fumaric acid, tartaric acid, citric acid, succinic acid, gentisic acid, oxalic acid, 1-hydroxy-2-naphthoic acid, orotic acid, glutaric acid, L-tartaric acid, palmitic acid, L-proline, salicylic acid, lauric acid, L-malic acid and maleic acid. Also disclosed is a use of a co-crystal comprising modafinil in the manufacture of a medicament for the treatment of excessive daytime sleepiness associated with narcolepsy, multiple sclerosis related fatigue, infertility, eating disorders, attention deficit hyperactivity disorder (ADHD), Parkinson's disease, incontinence, sleep apnea, or myopathies.

Description

545133 MODAFINIL COMPOSITIONS CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of Application No. PCT/US03/27772, filed September 4,2003, which claims the benefit of U.S. Application No. 10/378,956, filed March 3, 2003, U.S. Provisional Application No. 60/463,962, filed April 18, 2003, U.S. Provisional Application No. 60/451,213, filed February 28,2003, and U.S. Provisional Application No. 60/487,064, filed July 11, 2003. Said U.S. Application No. 10/378,956, filed March 3, 2003 claims the benefit of U.S. Provisional Application No. 60/360,768, filed March 1, 2002.

This application is also a continuation-in-part of U.S. Application No. 10/660,202, filed September 11,2003, which claims the benefit of PCT/US03/27772, filed September 4, 2003. Said U.S. Application No. 10/660,202, filed September 11, 2003 also claims the benefit of U.S. Application No. 10/637,829, filed August 8, 2003, which is a divisional of U.S. Application No. 10/295,995, filed November 18, 2002, which is a continuation of U.S. Application No. 10/232,589, filed September 3, 2002, which claims the benefit of U.S. Provisional Application No. 60/406,974, filed August 30,2002, U.S. Provisional Application No. 60/380,288, filed May 15,2002, and U.S. Provisional Application No. 60/356,764, filed February 15, 2002. Said U.S. Application No. 10/660,202, filed September 11,2003, is also a continuation-in-part of U.S. Application 10/449,307, filed May 30,2003, which claims the benefit of U.S. Provisional Application No. 60/463,962, filed April 18, 2003, U.S. Provisional Application No. 60/444,315, filed January 31,2003, U.S. Provisional Application No. 60/439,282, filed January 10,2003, and U.S. Provisional Application No. 60/384,152, filed May 31,2002. Said U.S. Application No. 10/660,202, filed September 11,2003, is also a continuation-in-part of U.S. Application 10/601,092, filed June 20, 2003.

Said U.S. Application No. 10/660,202, filed September 11,2003, also claims the benefit of U.S. Provisional Application No. 60/451,213, filed February 28,2003, U.S. Provisional Application No. 60/463,962, filed April 18, 2003, and U.S. Provisional Application No. 60/487,064, filed July 11, 2003.

This application is also a continuation-in-part of Application No. PCT/US04/06288, filed February 26,2004, which claims the benefit of U.S. Provisional Application No. 60/451,213, filed February 28,2003, U.S. Provisional 1 545133 Application No. 60/487,064, filed July 11,2003, Application No. PCT/US03/27772, filed September 4,2003, U.S. Application No. 10/660,202, filed September 11, 2003, Application No. PCT/US03/06662, filed March 3,2003, U.S. Provisional Application No. 60/508,208, filed October 2,2003, U.S. Provisional Application No. 60/542,752, filed February 6,2004, U.S. Provisional Application No. 60/463,962, filed April 18, 2003, U.S. Application No. 10/449,307, filed May 30,2003, U.S. Provisional Application No. 60/456,027, filed March 18, 2003, U.S. Application No. 10/601,092, filed June 20,2003, Application No. PCT/US03/19574, filed June 20, 2003, and Application No. PCT/US03/41273, filed December 24,2003.

This application also claims the benefit of U.S. Provisional Application No. 60/508,208, filed October 2, 2003, U.S. Provisional Application No. 60/542,752, filed February 6,2004, U.S. Provisional Application No. 60/560,411, filed April 6, 2004, U.S. Provisional Application No. 60/573,412, filed May 21,2004, U.S. Provisional Application No. 60/579,176, filed June 12, 2004, U.S. Provisional Application No. 60/581,992, filed June 22,2004, U.S. Provisional Application No. 60/586,752, filed July 9,2004, and U.S. Provisional Application No. 60/588,236, filed July 15,2004.

All of the applications above, to which a benefit is claimed, are herein incorporated by reference in their entireties.

FIELD OF THE INVENTION The present invention relates to modafmil containing co-crystals and uses of the same.

BACKGROUND OF THE INVENTION Active pharmaceutical ingredients (API or APIs (plural)) in pharmaceutical compositions can be prepared in a variety of different forms. Such APIs can be prepared so as to have a variety of different chemical forms including chemical derivatives, solvates, hydrates, co-crystals, or salts. Such APIs can also be prepared to have different physical forms. For example, the APIs may be amorphous, may have different crystalline polymorphs, or may exist in different solvation or hydration states. By varying the form of an API, it is possible to vary the physical properties 2 INTELLECTUAL property OFFICE OF N.Z. 2 6 may 2009 received 545133 thereof. For example, crystalline polymorphs typically have different solubilities from one another, such that a more thermodynamically stable polymorph is less soluble than a less thermodynamically stable polymorph. Pharmaceutical polymorphs can also differ in properties such as shelf-life, bioavailability, morphology, vapour pressure, density, colour, and compressibility. Accordingly, variation of the crystalline state of an API is one of many ways in which to modulate the physical properties thereof.

It would be advantageous to have new forms of these APIs that have improved properties, in particular, as oral formulations. Specifically, it is desirable to identify improved forms of APIs that exhibit significantly improved properties including increased aqueous solubility and stability. Further, it is desirable to improve the processability, or preparation of pharmaceutical formulations. For example, needlelike crystal forms or habits of APIs can cause aggregation, even in compositions where the API is mixed with other substances, such that a non-uniform mixture is obtained. Needle-like morphologies can also give rise to filtration problems (See e.g., Mirmehrabi et al. J. Pharm. Sci. Vol. 93, No. 7, pp. 1692-1700,2004). It is also desirable to increase the dissolution rate of API-containing pharmaceutical compositions in water, increase the bioavailability of orally-administered compositions, and provide a more rapid onset to therapeutic effect. It is also desirable to have a form of the API which, when administered to a subject, reaches a peak plasma level faster, has a longer lasting therapeutic plasma concentration, and higher overall exposure when compared to equivalent amounts of the API in its presently-known form.

Modafinil, an API used to treat subjects with narcolepsy, is practically insoluble in water. Modafinil(CAS Registry Number: 68693-11-8) is represented by the structure (I): 3 Modafinil is a chiral molecule due to the chiral SgQ^roup. Therefore, modaflnil exists as two isomers, R-{-)-modafinil and S-(+)-modafinil. It would be advantageous to have new forms of modafinil that have improved properties, in particular, as oral formulations. Specifically, it is desirable to identify improved forms of modafinil that exhibit significantly increased aqueous solubilities and both chemical and form stability. It is also desirable to increase the dissolution rate of API-containing pharmaceutical compositions in water, increase the bioavailability of orally-administered compositions, and provide a more rapid onset to therapeutic effect. It is also desirable to have a form of the API which, when administered to a subject, reaches a peak plasma level faster and/or has a longer lasting plasma concentration and higher overall exposure at high doses when compared to equivalent amounts of the API in its presently-known form.

SUMMARY OF THE INVENTION It has now been found that co-crystals and solvates of modafinil can be obtained, many of which have different properties as compared to the free form of the API.

In one aspect the invention provides a co-crystal comprising modafinil and a co-crystal former selected from the group consisting of: malonic acid, glycolic acid, fumaric acid, tartaric acid, citric acid, succinic acid, gentisic acid, oxalic acid, l-hydroxy-2-naphthoic acid, orotic acid, glutaric acid, L-tartaric acid, palmitic acid, L-proline, salicylic acid, lauric acid, L-malic acid, and maleic acid.

Herein described is a co-crystal of modafinil, wherein the co-crystal former is an ether, thioether, alcohol, thiol, aldehyde, ketone, thioketone, nitrate ester, phosphate ester, thiophosphate ester, ester, thioester, sulfate ester, carboxylic acid, phosphonic acid, phosphinic acid, sulfonic acid, amide, primaiy amine, secondary amine, ammonia, tertiary amine, sp2 amine, thiocyanate, cyanamide, oxime, nitrile, diazo, organohaiide, nitro, S-heterocyclic ring, thiophene, N-heterocyclic ring, pyrrole, O-heterocyclic ring, fiiran, epoxide, hydroxamic acid, imidazole, or pyridine.

Also described is a pharmaceutical composition comprising a co-crystal of modafinil. Typically, the pharmaceutical composition further comprises one or more pharmaceutically-acceptable carriers, diluents or excipients. Pharmaceutical compositions described herein are described in further detail below. 4 intellectual property office of n.z. 2 6 may 2009 DPP.cn/cn 545133 Also described is a process for the preparation of a co-crystal of modafinil, which comprises: (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-crystals comprising modafinil and the co-ciystal former.

In an embodiment, the co-crystal former has at least one functional group selected from the group consisting of ether, thioether, alcohol, thiol, aldehyde, ketone, thioketone, nitrate ester, phosphate ester, thiophosphate ester, ester, thioester, sulfate ester, carboxylic acid, phosphonic acid, phosphinic acid, sulfonic acid, amide, primary amine, secondary amine, ammonia, tertiary amine, sp2 amine, thiocyanate, cyanamide, oxime, nitrile, diazo, organohalide, nitro, S-heterocyclic ring, thiophene, N-heterocyclic ring, pyrrole, O-heterocyclic ring, furan, epoxide, hydroxamic acid, imidazole, or pyridine.

Embodiment as described including, but not limited to, co-crystals, polymorphs, and solvates can comprise racemic modafinil, enantiomerically pure modafinil (i.e., R-(-)-modafinil or S-(+)-modafinil), or enriched modafinil (e.g., between about 55 and about 90 percent ee). Similarly, co-crystal formers and solvent molecules (e.g., in a solvate) can also exist as racemic, enantiomerically pure, or an enriched form in embodiments of the present invention.

Also described is a process for increasing the solubility of modafinil in water, simulated gastric fluid (SGF), or simulated intestinal fluid (SIF) for use in a pharmaceutical composition or medicament, which process comprises: (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; intellectual property office of n.z. 2 6 may 2009 received 545133 (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with tile co-crystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-crystals comprising the modafinil and the co-crystal former.

Also described is a process for modulating the dissolution of modafinil, whereby the aqueous dissolution rate or the dissolution rate in simulated gastric fluid or in simulated intestinal fluid, or in a solvent or plurality of solvents is increased, which process comprises: (a) providing modafinil; (b) providing a co-ciystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-ciystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-crystals comprising the modafinil and the co-crystal former.

Also described is a process for modulating the bioavailability of modafinil, whereby the AUC is increased, the time to Tmax is reduced, the length of time the concentration of modafinil is above lA Tmax is increased, or Cmax is increased, which process comprises: (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-ciystals comprising the modafinil and the co-crystal former. intellectual property office of n.z. 2 6 may 2009 r f r. f i v f n 545133 Also described is a process for modulating the dose response of modafinil for use in a pharmaceutical composition or medicament, which process comprises: (a) providing modafinil: (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-crystals comprising the modafinil and the co-crystal the stability of modafinil (as compared to a reference form such as its free form), which process comprises: (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution conditions, so as to form a solid phase; and (d) isolating co-crystals comprising the modafinil and the co-crystal former.

Also described is a process for modifying the morphology of modafinil, which process comprises: (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; former.

Also described is a process for improving the modafinil with the co-crystal former under crystallization 7 intellectual property offige of n.z. 545133 (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-ciystals comprising the modafinil and the co-crystal former.

Also described is a process of screening for co-crystal compounds, which comprises: (a) providing (/) modafinil and (/'/) a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-ciystal; and (b) screening for co-crystals of modafinil with a co-crystal former by subjecting each combination of modafinil and co-crystal former to a procedure comprising: (i) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (ii) isolating co-crystals comprising the modafinil and the co-crystal former.

Also described is a process of screening for co-crystal compounds, which comprises: (a) providing (/) modafinil and (//) a plurality of different co-crystal formers compatible with a functional group of modafinil such that each co-crystal former and the modafinil can form a co-crystal; and (b) screening for co-crystals of modafinil with co-ciystal formers by subjecting each combination of modafinil and co-crystal former to a procedure comprising: (i) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (ii) isolating co-ciystals comprising the modafinil and the co-crystal former. 8 intellectual property office of n.z. 2 £ may 2009 RPnFIVPD 545133 Also described is a co-crystal composition comprising a co-crystal, wherein said co-crystal comprises modafinil and a co-ciystal former. In further embodiments the co-ciystal has an improved property as compared to the free form (which includes hydrates and solvates). In further embodiments, the improved property is selected from the group consisting of: increased solubility, increased dissolution, increased bioavailability, increased dose response, or other property described herein.

In another embodiment, the present invention provides a co-crystal comprising modafinil and a co-crystal former selected from the group consisting of: malonic acid, glycolic acid, fumaric acid, tartaric acid, citric acid, succinic acid, gentisic acid, oxalic acid, 1 -hydroxy-2-naphthoic acid, orotic acid, glutaric acid, L-tartaric acid, palmitic acid, L-proline, salicylic acid, lauric acid, L-malic acid, and maleic acid.

In further embodiments, the present invention provides the following co-crystals: modafinihmalonic acid, modafinil:glycolic acid, modafinil:maIeic acid, modafmil:L-tartaric acid, modafinil:citric acid, modafiniksuccinic acid, modafinil:DL-tartaric acid, modafinikfumaric acid (Form I), modafinikfumaric acid (Form II), modafinil:gentis ic acid, modafinikoxalic acid, modafinil: l-hydroxy-2-naphthoic acid, R-(-)-modafinil:malonic acid, R-(-)-modafinil:succinic acid, R-(-)-modafmikcitric acid, R-(-)-modafin il :DL-tartaric acid, R-(-)-modafinil:l -hydroxys-naphthoic acid, R-(-)-modafmil:orotic acid, R-(-)-modafmil:glutaric acid, R-(-)-modafmikL-tartaric acid, R-(-)-modafinil:paImitic acid, R-(-)-modafinil:L-proline, R-(-)-modafinil:salicylic acid, R-(-)-modafinil:lauric acid, R-(-)-modafinil:L-maIic acid, and R-(-)-modafmil:gentisic acid.

Also described is a novel polymorph or co-crystal of racemic modafinil (form VII).

In another embodiment, described are the following modafinil solvates: acetic acid, tetrahydrofuran, 1,4-dioxane, methanol, nitromethane, acetone, o-xylene, benzene, ethanol, benzyl alcohol, isopropanol, acetonitrile, and toluene.

The processes as described herein may each comprise a further step or steps in which the modafinil co-crystal produced thereby is incorporated into a pharmaceutical composition. intellectual property offige of n.z. 2 6 may 2009 received RECEIVED at IPONZ on 13 November 2009 545133 In another embodiment, a pharmaceutical composition comprises a modified release profile of one or more of racemic modafinil, R-(-)-modafinil, and S-(+)-modafinil. The modified release profile can comprise, for example, two or more maxima of plasma concentration, such as a dual-release profile.

Also described is a medicament comprising a co-crystal of modafinil and methods of making the same. Typically, the medicament further comprises one or more pharmaceutically-acceptable carriers, diluents or excipients. Medicaments according to the invention are described in further detail below.

The processes described may each comprise a farther step or steps in which the modafinil co-crystal produced thereby is incorporated into a medicament.

In another aspect the invention provides a use of a co-crystal of the invention in the manufacture of a medicament for treating a subject suffering from excessive daytime sleepiness associated with narcolepsy, multiple sclerosis related fatigue, infertility, eating disorders, attention deficit hyperactivity disorder (ADHD), Parkinson's disease, incontinence, sleep apnea, or myopathies.

Also described herein is a method for treating a subject, preferably a human subject, suffering from excessive daytime sleepiness associated with narcolepsy, multiple sclerosis related fatigue, infertility, eating disorders, attention deficit hyperactivity disorder (ADHD), Parkinson's disease, incontinence, sleep apnea, or myopathies where modafinil is an effective active pharmaceutical for said disorder. The method comprises administering to the subject a therapeutically-effective amount of a co-crystal or a solvate comprising modafinil, or a polymorph of modafinil.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1- PXRD diffractogram of a co-crystal comprising modafinil and malonic acid. Figure 2- DSC thermogram of a co-crystal comprising modafinil and malonic acid. Figure 3- TGA thermogram of a co-ciystal comprising modafinil and malonic acid. Figure 4A and 4B- Raman spectrum of a co-ciystal comprising modafinil and malonic acid (Figure 4A), and three Raman spectra of modafinil (bottom spectrum), malonic acid (middle spectrum), and a co-crystal comprising modafinil and malonic acid (top 545133 spectrum) (Figure 4B).

Figure 5A and 5B- Infrared spectrum of a co-crystal comprising modafinil and malonic acid (Figure 5A), and three Infrared spectra of modafinil (top spectrum), malonic acid (middle spectrum), and a co-crystal comprising modafinil and malonic acid (bottom spectrum) (Figure 5B). 10a 198Q889_1.DOC 2 6 MAY 2009 RPPciwi— 545133 Figure 6A- PXRD diffractogram of a co-crystal comprising modafinil and malonic acid.

Figure 6B- DSC thermogram of a co-crystal comprising modafinil and malonic acid (from grinding).

Figure 7- Packing diagram for modafinil:malonic acid co-crystal.

Figures 8A and 8B- PXRD diffractograms of a co-crystal comprising modafinil and glycolic acid, background removed and as collected, respectively.

Figures 9A and 9B- PXRD diffractograms of a co-crystal comprising modafinil and maleic acid, background removed and as collected, respectively.

Figure 10- PXRD diffractogram of a co-crystal comprising modafinil and L-tartaric acid.

Figure 11 A- PXRD diffractogram of a co-crystal comprising modafinil and citric acid. Figure 1 IB- DSC thermogram of a co-crystal comprising modafinil and citric acid. Figures 12A and 12B- PXRD diffractogram of a co-crystal comprising modafinil and succinic acid, background removed and as collected, respectively.

Figure 13- DSC thermogram of a co-crystal comprising modafinil and succinic acid. Figure 14- Packing diagram of a co-crystal comprising modafinil and succinic acid. Figure 15- PXRD diffractogram of a co-crystal comprising modafinil and DL-tartaric acid.

Figure 16- PXRD diffractogram of a co-crystal comprising modafinil and fumaric acid (Form I).

Figure 17- Packing diagram of a co-crystal comprising modafinil and fumaric acid (Form I).

Figure 18- PXRD diffractogram of a co-crystal comprising modafinil and fumaric acid (Form II).

Figure 19- PXRD diffractogram of a co-crystal comprising modafinil and gentisic acid.

Figure 20- PXRD diffractogram of a co-crystal comprising modafinil and oxalic acid. Figure 21- PXRD diffractogram of a co-crystal comprising modafinil and 1-hydroxy-2-naphthoic acid.

Figure 22- PXRD diffractogram of a co-crystal comprising R-(-)-modafinil and malonic acid.

Figure 23- DSC thermogram of a co-crystal comprising R-(-)-modafinil and malonic acid. 11 wo 2oo5/o23i(>8 545133 Figure 24- PXRD diffractogram of a co-crystal comprising R-(-)-modafinil and succinic acid.

Figure 25- DSC thermogram of a co-crystal comprising R-(-)-modafinil and succinic acid.

Figure 26- PXRD diffractogram of a co-crystal comprising R-(-)-modafmil and citric acid.

Figure 27- DSC thermogram of a co-crystal comprising R-(-)-modafinil and citric acid.

Figure 28- PXRD diffractogram of a co-crystal comprising R-(-)-modafinil and DL-tartaric acid.

Figure 29- DSC thermogram of a co-crystal comprising R-(-)-modafinil and DL-tartaric acid.

Figure 30- PXRD diffractogram of a co-ciystal comprising R-(-)-modafiniI and 1-hydroxy-2-naphthoic acid.

Figure 31- DSC thermogram of a co-crystal comprising R-(-)-modafinil and 1-hydroxy-2-naphthoic acid.

Figure 32- PXRD diffractogram of a co-crystal comprising R-(-)-modafinil and 1- hydroxy-2-naphthoic acid obtained from a high throughput experiment.

Figure 33- PXRD diffractogram of a co-crystal comprising R-(-)-modafinil and orotic acid.

Figure 34- DSC thermogram of a co-crystal comprising R-(-)-modafmiI and orotic acid.

Figure 35- PXRD diffractogram of a solvate comprising modafinil and acetic acid. Figure 36- TGA thermogram of a solvate comprising modafinil and acetic acid. Figure 37- DSC thermogram of a solvate comprising modafinil and acetic acid.

Figure 38- Raman spectrum of a solvate comprising modafinil and acetic acid.

Figure 39- PXRD diffractogram of a solvate comprising modafinil and tetrahydrofuran.

Figure 40- PXRD diffractogram of a solvate comprising modafinil and 1,4-dioxane. Figure 41- PXRD diffractogram of a solvate comprising modafinil and methanol. Figure 42- TGA thermogram of a solvate comprising modafinil and methanol.

Figure 43- DSC thermogram of a solvate comprising modafinil and methanol.

Figure 44- PXRD diffractogram of a solvate comprising modafinil and nitromethane. Figure 45- PXRD diffractogram of a solvate comprising modafinil and acetone. 12 WO 2005/0231')8 545133 Figure 46- PXRD diffractogram of a possible solvate comprising modafinil and acetone.

Figure 47- PXRD diffractogram of a possible solvate comprising modafinil and 1,2-dichloroethane.

Figure 48- PXRD diffractogram of a polymorph of modafinil (Form VII).

Figure 49- Stability plot of modafmikmalonic acid co-crystal over a 26 week period. Figure 50- Closer view of stability plot of modafinilrmalonic acid co-crystal over a 26 week period.

Figure 51- PXRD diffractogram comparison of modafinil:malonic acid co-crystal after several environmental conditions are endured.

Figure 52- Dissolution profile of several formulations of modafinil free form and modafinil:malonic acid.

Figure 53 -In Vitro dissolution profile of modafinil-.malonic acid co-crystal in SGF and SIF.

Figure 54- In Vitro dissolution profile of modafinikmalonic acid co-crystal in HC1. Figure 55- DVS plot of modafmil:malonic acid co-crystal.

Figure 56- Pharmacokinetics of modafinil malonic acid co-crystal in dogs.

Figure 57- PXRD diffractogram of a co-crystal comprising R-(-)-modafinil and gentisic acid.

Figure 58- Packing diagram of acetone channel solvate of modafinil.

Figure 59- Additional packing diagram of acetone channel solvate of modafinil.

Figure 60- PXRD diffractogram of o-xylene solvate.

Figure 61- Raman spectrum of o-xylene solvate (middle spectrum).

Figure 62- TGA thermogram of o-xylene solvate.

Figure 63- DSC thermogram of o-xylene solvate.

Figure 64- PXRD diffractogram of benzene solvate.

Figure 65- Raman spectrum of benzene solvate (middle spectrum).

Figure 66- TGA thermogram of benzene solvate.

Figure 67- DSC thermogram of benzene solvate.

Figure 68- PXRD diffractogram of toluene solvate.

Figure 69- Raman spectrum of toluene solvate (middle spectrum).

Figure 70- TGA thermogram of toluene solvate.

Figure 71- DSC thermogram of toluene solvate.

Figure 72- PXRD diffractogram of R-(-)-modaflnil ethanol solvate. 13 545133 Figure 73- TGA thermogram ofR-(-)-modafinil ethanoi solvate.

Figure 74- PXRD diffractogram of R-(-)-modafmil benzyl alcohol solvate.

Figure 75- DSC thermogram of R-(-)-modafinil benzyl alcohol solvate.

Figure 76- TGA thermogram of R-(-)-modafinil benzyl alcohol solvate.

Figure 77- PXRD diffractogram of R-(-)-modafinil isopropanol solvate.

Figure 78- PXRD diffractogram of R-(-)-modafinil acetonitrile solvate.

Figure 79- PXRD diffractogram of R-(-)-modafinil:glutaric acid co-ciystal.

Figure 80- PXRD diffractogram of R-(-)-modafinil:citric acid co-crystal.

Figure SI - PXRD diffractogram of R-(-)-modafinil:L-tartaric acid co-crystal.

Figures 82A and 82B- PXRD diffractograms of R-(-)-modafmil:oxalic acid co-crystal.

Figure 83- PXRD diffractogram of R-(-)-modafinil:palmitic acid co-crystal.

Figure 84- PXRD diffractogram of R-(-)-modafinil:L-proline co-crystal.

Figure 85- PXRD diffractogram of R-(-)-modafinil:salicylic acid co-crystal.

Figure 86- PXRD diffractogram of R-(-)-modafinil:lauric acid co-crystal.

Figure 87- PXRD diffractogram of R-(-)-modafinil:L-malic acid co-crystal.

DETAILED DESCRIPTION OF THE INVENTION The structure of modafinil includes a stereocenter and, therefore, can exist as a racemate, one of two pure isomers, or any ratio of the two isomeric pairs. The chemical name of racemic modafinil is (±)-2-[(Diphenylmethyl) sulfinyl]acetamide. The isomeric pairs of racemic modafinil are R-(-)-2-[(Diphenylmethyl) suifinyl]acetamide or R-(-)-modafmil and S-(+)-2-[(Diphenylmethyl) sulfmyl]acetamide or S-(+)-mo4afitiil.

The term "comprising" as used in this specification means "consisting at least in part of'. When interpreting each statement in this specification that includes the term "comprising", features other than that or those prefaced by the term may also be present. Related terms such as "comprise" and "comprises" are to be interpreted in the same manner.

In the description in this specification reference may be made to subject matter that is not within the scope of the claims of the current application. That subject matter should be readily identifiable by a person skilled in the art and may assist in putting into practice the invention as defined in the claims of this application. 14 intellectual property office of n.2. 2 6 may 2009 545133 As used herein and unless otherwise specified, the term "enantiomerically pure" includes a composition which is substantially enantiomerically pure and includes, for example, a composition with greater than or equal to about 90, 91, 92, 93,94, 95, 96, 97, 98, or 99 percent enantiomeric excess. Enantiomeric excess is defined by percent enantiomer A - percent enantiomer B, or by the formula: WO 2005/0231<>8 545133 ee percent = 100 * ([R] - [S] / ([R] + [S]), where R is moles of R-(-)-modafmil and S is moles of S-(+)-modafinil.

As used herein, the term "modafinil" includes the racemate, other mixtures of R- and S-isomers, and single enantiomers, but may be specifically set forth as the racemate, R-isomer, S-isomer, or any mixture of both R- and S-isomers.

As used herein and unless otherwise specified, the term "racemic co-crystal" refers to a co-crystal which is comprised of an equimolar mixture of the enantiomers of modafinil, the co-crystal former, or both. For example, a co-crystal comprising modafinil and a non-stereoisomeric co-crystal former is a "racemic co-crystal" only when there is present an equimolar mixture of the modafinil enantiomers. Similarly, a co-crystal comprising modafinil and a stereoisomeric co-crystal former is a "racemic co-crystal" only when there is present an equimolar mixture of the modafinil enantiomers and of the co-crystal former enantiomers.

As used herein and unless otherwise specified, the term "enantiomerically pure co-crystal" refers to a co-crystal which is comprised of modafinil and a stereoisomeric or non-stereoisomeric co-crystal former where the enantiomeric excess of the stereoisomeric species is greater than or equal to about 90 percent ee (enantiomeric excess).

The term "co-crystal" as used herein means a crystalline material comprised of two or more unique solids at room temperature (22 degrees C), each containing distinctive physical characteristics, such as structure, melting point, and heats of fusion, with the exception that, if specifically stated, the API may be a liquid at room temperature. The co-crystals of the present invention comprise a co-crystal former Hi-bonded to modafinil or a derivative thereof. The co-crystal former may be H-bonded directly to modafinil or may be H-bonded to an additional molecule which is bound to modafinil. The additional molecule may be H-bonded to modafinil or bound ionically to modafinil. The additional molecule could also be a different API. Solvates of modafinil compounds that do not further comprise a co-crystal former are not co-crystals according to the present invention. The co-crystals may however, include one or more solvate molecules in the crystalline lattice. That is, a solvate of co-crystal, or a co-crystal further comprising a solvent or compound that is a liquid at room temperature, is a co-crystal according to the present invention, but crystalline material comprised of only modafinil and one or more liquids (at room temperature) are not co-crystals for purposes of the present invention. Other modes of molecular 545133 recognition may also be present including, pi-stacking, guest-host complexation and van der Waals interactions. Of the interactions listed above, hydrogen-bonding is the dominant interaction in the formation of the co-crystal, (and a required interaction according to the present invention) whereby a non-covalent bond is formed between a hydrogen bond donor of one of the moieties and a hydrogen bond acceptor of the other. Hydrogen bonding can result in several different intermolecular configurations. For example, hydrogen bonds can result in the formation of dimers, linear chains, or cyclic structures. These configurations can further include extended (two-dimensional) hydrogen bond networks and isolated triads. An alternative embodiment provides for a co-crystal wherein the co-crystal former is a second API. In another embodiment, the co-crystal former is not an API.

For purposes of the present invention, the chemical and physical properties of modafinil in the form of a co-crystal may be compared to a reference compound that is modafinil in a different form. The reference compound may be specified as a free form, or more specifically, an anhydrate or hydrate of a free form, or more specifically, for example, a hemihydrate, monohydrate, dihydrate, trihydrate, quadrahydrate, pentahydrate; or a solvate of a free form. For example, the reference compound for modafinil in free form co-crystallized with a co-crystal former can be modafinil in free form. The reference compound may also be specified as crystalline or amorphous. The reference compound may also be specified as the most stable polymorph known of the specified form of the reference compound.

The ratio of modafinil to co-crystal former may be stoichiometric or non-stoichiometric according to the present invention. Non-limiting examples such as, 1:1,1:1.5, 1.5:1,1:2, and 2:1 ratios of modafinikco-crystal former are acceptable. In addition, co-crystals with vacancies within the crystalline lattice are included in the present invention. For example, a co-crystal with less than or about 0.01, 0.1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,13, 14,15, 16, 17, 18, 19, or 20 percent vacancies within the crystalline lattice are included in the present invention. The vacancies can be due to missing modafinil molecules or missing co-crystal former molecules from the crystalline lattice, or both.

It has surprisingly been found that when modafinil and a selected co-crystal former are allowed to form co-ciystals, the resulting co-crystals often give rise to improved properties of modafinil, as compared to modafinil in the free form, 16 545133 particularly with respect to: solubility, dissolution, bioavailability, stability, Cmax, Tmax. processability (including compressibility), longer lasting therapeutic plasma concentration, etc. For example, a co-crystal form of modafinil is particularly advantageous due to the low solubility of modafinil in water. Additionally, the co-crystal properties conferred upon modafinil are also useful because the bioavailability of modafinil can be improved and the plasma concentration and/or serum concentration of modafinil can be im proved. This is particularly advantageous for orally-administrable formulations. Moreover, the dose response of modafinil can be improved, for example by increasing the maximum attainable response and/or increasing the potency of modafinil by increasing the biological activity per dosing equivalent.

Accordingly, herein described is a pharmaceutical composition (or medicament) comprising a co-ciystal of modafinil and a co-crystal former, such that the modafinil and the co-crystal former are capable of co-crystallizing from a solution phase under crystallization conditions or from the solid-state, for example, through grinding or heating. In another aspect, the co-crystal former which has at least one functional group selected from the group consisting of ether, thioether, alcohol, thiol, aldehyde, ketone, thioketone, nitrate ester, phosphate ester, thiophosphate ester, ester, thioester, sulfate ester, carboxylic acid, phosphonic acid, phosphinic acid, sulfonic acid, amide, primary amine, secondary amine, ammonia, tertiary amine, sp2 amine, thiocyanate, cyanamide, oxime, nitrile, diazo, organohalide, nitro, S-heterocyclic ring, thiophene, N-heterocyclic ring, pyrrole, O-heterocyclic ring, furan, epoxide, hydroxamic acid, imidazole, and pyridine, or a functional group in a Table herein, such that the modafinil and co-crystal former are capable of co-crystallizing from a solution phase under crystallization conditions.

In another embodiment, the use of an excess (more than 1 molar equivalent for a 1:1 co-crystal) of a co-ciystal former can be used to drive the formation of stoichiometric co-ctystals. For example, co-crystals with stoichiometrics of 1:1,2:1, or 1:2 can be produced by adding co-ciystal former in an amount that is 2,3,4, 5,6, 7,8, 9, 10,15,20,25, 50,75,100 times or more than the stoichiometric amount for a given co-crystal. Such an excessive use of a co-crystal former to form a co-crystal can be employed in solution or when grinding modafinil and a co-crystal former to cause co-crystal formation. 17 _ ^1 tLJr^^ALPRopERTY OFF/GE OF N.Z. 2 6 may 2309 RFPCn/r p\ 545133 In another embodiment of the present invention, a modafinil co-ciystal further comprises a co-crystal former which is hydrogen bonded via a preferred interaction between two or more functional groups. For example, modafinil and malonic acid co-crystallize through the interaction of a carboxylic acid functional group of the co-crystal former with sulfoxide and amide functional groups of modafinil.

In another embodiment of the present invention, the co-crystal comprises modafinil wherein the modafinil forms a dimeric primary amide structure via hydrogen bonds with an R22 (8) motif. See e.g., J. Bernstein, Polymorphism in Molecular Crystals. Oxford University Press, 2002, pp. 55-59, or M. C. Etter, Acct. Chem. Res., 1990, 23,120, or M. C. Etter, J. Phys. Chem., 1991, 95, 4601. In such a structure, the NHs moiety can also participate in a hydrogen bond with a donor or an acceptor moiety from, for example, a co-crystal former or an additional (third) molecule, and the C=0 moiety can participate in a hydrogen bond with a donor moiety from the co-crystal former or the additional molecule. In a further embodiment, the dimeric primary amide structure (formed by two modafinil molecules) further comprises one, two, three, or four hydrogen bond donors (from one, two, three, or four co-crystal formers). In a further embodiment, the dimeric primary amide structure further comprises one or two hydrogen bond acceptors (from one or two co-crystal formers). In a further embodiment, the dimeric primary amide structure further comprises a combination of hydrogen bond donors and acceptors. For example, the dimeric primary amide structure can further comprise one hydrogen bond donor and one hydrogen bond acceptor, one hydrogen bond donor and two hydrogen bond acceptors, two hydrogen bond donors and one hydrogen bond acceptor, two hydrogen bond donors and two hydrogen bond acceptors, or three hydrogen bond donors and one hydrogen bond acceptor.

The co-crystals of the present invention are formed where modafinil and the co-crystal former are bonded together through hydrogen bonds. Other non-covalent interactions, including pi-stacking and van der Waals interactions, may also be present.

In one embodiment, the co-crystal former is selected from the co-crystal formers of Table I and Table II. In other embodiments, the co-crystal former of Table I is specified as a Class 1, Class 2, or Class 3 co-crystal former (see column labeled "class" Table I). Table I lists multiple pKa values for co-crystal formers having 18 545133 multiple functionalities. It is readily apparent to one skilled in the art the particular functional group corresponding to a particular pKa value.

In another embodiment the particular functional group of a co-crystal former interacting with modafinil is specified (see for example Table I, columns labeled "Functionality" and "Molecular Structure" and the column of Table II labeled "Co-Crystal Former Functional Group").

In another embodiment, the co-crystal comprises more than one co-crystal former. For example, two, three, four, five, or more co-crystal formers can be incorporated in a co-crystal with modafinil. Co-crystals which comprise two or more co-crystal formers and an API are bound together via hydrogen bonds. In one embodiment, incorporated co-ciystal formers are hydrogen bonded to modafinil molecules. In another embodiment, co-crystal formers are hydrogen bonded to either the modafinil molecules or the incorporated co-crystal formers.

In each process, described herein, there is a need to contact modafinil with the co-crystal former. This may involve grinding the two solids together or melting one or both components and allowing them to recrystallize. This may also involve either solubilizing modafinil and adding the co-crystal former, or solubilizing the co-crystal former and adding modafinil. Crystallization conditions are applied to modafinil and the co-ciystal former. This may entail altering a property of the solution, such as pH or temperature and may require concentration of the solute, usually by removal of the solvent, typically by drying the solution. Solvent removal results in the concentration of both modafinil and the co-crystal former increasing over time so as to facilitate crystallization. For example, evaporation, cooling, or the addition of an antisolvent may be used to crystallize co-crystals. In another embodiment, a slurry comprising modafinil and a co-crystal former is used to form co-crystals. Once the solid phase comprising any crystals is formed, this may be tested as described herein.

The co-crystals obtained as a result of such process steps may be readily incorporated into a pharmaceutical composition (or medicament) by conventional means. Pharmaceutical compositions and medicaments in general we discussed in further detail below and may further comprise a pharmaceutically-acceptable diluent, excipient or carrier.

Described herein is a process for the preparation of a co-crystal of modafinil, which comprises: 19 545133 (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-crystals comprising modafinil and the co-ciystal former.

In an embodiment, the co-ciystal former has at least one functional group selected from the group consisting of ether, thioether, alcohol, thiol, aldehyde, ketone, thioketone, nitrate ester, phosphate ester, thiophosphate ester, ester, thioester, sulfate ester, carboxylic acid, phosphonic acid, phosphinic acid, sulfonic acid, amide, primary amine, secondary amine, ammonia, tertiary amine, sp2 amine, thiocyanate, cyanamide, oxime, nitrile, diazo, organohalide, nitro, S-heterocyclic ring, thiophene, N-heterocyclic ring, pyrrole, O-heterocyclic ring, furan, epoxide, hydroxamic acid, imidazole, or pyridine.

Also described is a process for the production of a pharmaceutical composition or medicament, which process comprises: (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co- crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions; (d) isolating co-crystals formed thereby; and (e) incorporating the co-crystals into a pharmaceutical composition or medicament In another embodiment, a process for the formation of co-crystals includes a meta-stable form of modafinil, the co-crystal former, or both. A meta-stable form can be for example, but not limited to, a polymorph, solvate, or hydrate of modafinil or the co-ciystal former. While not bound by theory, the incorporation of a meta-stable 2 6 MAIT 2009 545133 form may facilitate co-crystal formation via increasing the thermodynamic driving force.

Assaying the solid phase for the presence of co-crystals of modafinil and the co-crystal former may be carried out by conventional methods known in the art. For example, it is convenient and routine to use powder X-ray diffraction techniques to assess the presence of co-crystals. This may be affected by comparing the diffractograms of modafinil, the crystal former and putative co-crystals in order to establish whether or not true co-crystals had been formed. Other techniques, used in an analogous fashion, include differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), infrared spectroscopy (IR), and Raman spectroscopy. Single crystal X-ray diffraction is especially useful in identifying co-crystal structures.

Also described is a process of screening for co-crystal compounds, which comprises: (a) providing (/) modafinil and (ii) a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; and (b) screening for co-ciystals of the modafinil with the co-crystal former by subjecting each combination of modafinil and co-crystal former to a procedure comprising: crystal former.

An alternative embodiment is drawn to a process of screening for co-crystal compounds, which comprises: (a) providing (i) modafinil and (ii) a plurality of different co-crystal formers compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; and (i) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions so as to form a solid phase; and (ii) isolating co-crystals comprising the modafinil and the co- 21 2 6 mav m beceived wo 2005/023i<>8 545133 (b) screening for co-crystals of the modafinil with the co-crystal formers by subjecting each combination of the modafinil and the co-crystal formers to a procedure comprising: (i) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with each co-ciystal former under crystallization conditions so as to form a solid phase; and (ii) isolating co-crystals comprising the modafinil and the co- crystal former.

The present invention includes several co-crystals comprising modafinil and a carboxylic acid co-crystal former. Some examples include modafinil co-crystals comprising malonic acid, tartaric acid (L- and DL-), succinic acid, citric acid, fumaric acid, gentisic acid, oxalic acid, and l-hydroxy-2-naphthoic acid. These examples represent mono-, di- and tri-carboxylic acid co-crystal formers. Other acids, including carboxylic acids, may be used as co-crystal formers with modafinil including, but not limited to, palmitic acid, orotic acid, and adipic acid etc. These co-crystal formers may comprise one, two, three, or more carboxylic acid functional groups. Co-crystal formers can also include non-carboxylic acid molecules such as, but not limited to, urea, saccharin, and caffeine.

In another embodiment, a co-crystal comprises modafinil and a carboxylic acid as a co-crystal former. In another embodiment, the carboxylic acid co-crystal former has one, two, three, or more carboxylic acid functional groups.

Several co-crystals may exhibit one or more particular interactions between modafinil and a carboxylic acid co-crystal former. For example, a carboxylic acid functional group can interact with the primary amide and/or the S=0 functional group of modafinil via a hydrogen bond. In another embodiment, a carboxylic acid functional group from the co-ciystal former interacts with the primary amide functional group or the S=0 functional group of modafinil via a hydrogen bond. In another embodiment, a carboxylic acid functional group from the co-crystal former interacts with the periphery of the amide dimer of modafinil via a hydrogen bond. In another embodiment, a carboxylic acid functional group from the co-crystal former interacts with the amide dimer and the S=0 functional group of modafinil via a hydrogen bond. In another embodiment, a carboxylic acid functional group from the co-crystal former interacts with two amide dimers of modafinil via a hydrogen bond. 22 545133 Modafinil and some co-crystal formers of the present invention have one or more chiral centers and may exist in a variety of stereoisomeric configurations. As a consequence of these chiral centers, modafinil and several co-crystal formers of the present invention occur as racemates, mixtures of enantiomers and as individual enantiomers, as well as diastereomers and mixtures of diastereomers. All such racemates, enantiomers, and diastereomers are within the scope of the present invention including, for example, cis- and Jrara-isomers, R- and S-enantiomers, and (D)- and (L)-isomers. Co-crystals of the present invention can include isomeric forms of either modafinil or the co-crystal former or both. Isomeric forms of modafinil and co-crystal formers include, but are not limited to, stereoisomers such as enantiomers and diastereomers. In one embodiment, a co-crystal can comprise racemic modafinil and/or a co-crystal former. In another embodiment, a co-crystal can comprise enantiomerically pure R- or S-modafinil and/or a co-crystal former. In another embodiment, a co-crystal of the present invention can comprise modafinil or a co-crystal former with an enantiomeric excess of about 1 percent, 2 percent, 3 percent, 4 percent, 5 percent, 10 percent, 15 percent, 20 percent, 25 percent, 30 percent, 35 percent, 40 percent, 45 percent, 50 percent, 55 percent, 60 percent, 65 percent, 70 percent, 75 percent, 80 percent, 85 percent, 90 percent, 95 percent, 96 percent, 97 percent, 98 percent, 99 percent, greater than 99 percent, or any intermediate value. Several non-limiting examples of stereoisomeric co-crystal formers include tartaric acid and malic acid. In another embodiment, a polymorph or a solvate of the present invention can comprise modafinil with an enantiomeric excess of about 1 percent, 2 percent, 3 percent, 4 percent, 5 percent, 10 percent, 15 percent, 20 percent, 25 percent, 30 percent, 35 percent, 40 percent, 45 percent, 50 percent, 55 percent, 60 percent, 65 percent, 70 percent, 75 percent, 80 percent, 85 percent, 90 percent, 95 percent, 96 percent, 97 percent, 98 percent, 99 percent, greater than 99 percent, or any intermediate value.

"Enriched" modafinil, according to the present invention, comprises both the R-(-)- and S-(+)-isomers of modafinil in amounts greater than or equal to about 5, 6, 7, 8, 9, or 10 percent by weight and less than or equal to about 90, 91, 92, 93, 94, or 95 percent by weight. For example, a composition comprising 67 percent by weight R-(-)-modafinil and 33 percent by weight S-(+)-modafinil is an enriched modafinil composition. In such an example, the composition is neither racemic nor enantiomerically pure. The term "enriched R-(-)-modafinil" may be used to describe 23 545133 a composition of modafinil with greater than 50 percent R-(-)-modafinil and less than 50 percent S-(+)-modafinil. Likewise, the term "enriched S-(+)-modafinil" may be used to describe a composition of modafinil with greater than 50 percent S-(+)-modafinil and less than 50 percent R-(-)-modafinil.

The terms "R-(-)-modafinil" and "S-(+)-modafinil" can be used to describe enriched modafinil, enantiomerically pure modafinil, or substantially enantiomerically pure modafinil, but may also specifically exclude enriched modafinil, enantiomerically pure modafinil, and/or substantially enantiomerically pure modafinil.

Co-crystals, solvates, and polymorphs comprising enantiomerically pure and/or enantiomerically enriched components (e.g., modafinil or co-crystal former) can give rise to chemical and/or physical properties which are modulated with respect to those of the corresponding co-crystal comprising a racemic component. For example, the modafinihmalonic acid co-crystal from Example 1 comprises racemic modafinil. Enantiomerically pure R-(-)-modafinil:malonic acid is included in the scope of the invention. Likewise, enantiomerically pure S-(+)-modafinil:malonic acid is included in the scope of the invention. A co-crystal comprising an enantiomerically pure component can give rise to a modulation of, for example, activity, bioavailability, or solubility, with respect to the corresponding co-crystal comprising a racemic component. As an example, the co-crystal R-(-)-modafinil:malonic acid can have modulated properties as compared to the racemic modafinikmalonic acid co-ciystal.

Polymorphs and solvates of modafinil can also be prepared with racemic modafinil, enantiomerically pure modafinil, or with any mixture of R-(-)- and S-(+)-modafinii according to the present invention.

In another embodiment, herein described is a pharmaceutical composition or medicament comprising a co-crystal with enantiomerically pure modafinil and/or co-crystal former wherein the bioavailability is modulated with respect to the racemic co-crystal. In another embodiment, also described is ^ftdutki's a pharmaceutical composition or medicament comprising a co-crystal with enantiomerically pure modafinil and/or co-crystal former wherein the activity is modulated with respect to the racemic co-crystal. Also described is invention inclinte a pharmaceutical composition or medicament comprising a co- 24 2 6 mav 2009 fREnpn/r-i-N 545133 crystal with enantiomerically pure modafinil and/or co-crystal former wherein the solubility is modulated with respect to the racemic co-crystal.

In another embodiment, a pharmaceutical composition or medicament can be formulated to contain modafinil in co-crystai form as micronized or nano-sized particles. More specifically, another embodiment couples the processing of pure modafinil to a co-crystal form with the process of making a controlled particle size for manipulation into a pharmaceutical dosage form. This embodiment combines two processing steps into a single step via techniques such as, but not limited to, grinding, alloying, or sintering (i.e., heating a powder mix). The coupling of these processes overcomes a serious limitation of having to isolate and store the bulk drug that is required for a formulation, which in some cases can be difficult to isolate (e.g., amorphous, chemically or physically unstable).

Solubility Modulation In a farther aspect, herein described is a process for increasing the solubility of modafinil in water, simulated gastric fluid (SGF), or simulated intestinal fluid (SIF) for use in a pharmaceutical composition or medicament, which process comprises: (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-crystals comprising the modafinil and the co-crystal former.

In one embodiment, the solubility of modafinil is modulated such that the aqueous solubility (mg/mL) is increased by at least 1.1,1.2,1.3,1.5,2.0,5.0,10.0, 20.0,25.0,50.0,75.0, or 100.0 times or more than the free form. Solubility of modafinil may be measured by any conventional means such as chromatography (e.g., HPLC) or spectroscopic determination of the amount of modafinil in a saturated 'NTEomcEaoft£entv 2 6 may 2009 | recelvpn 545133 solution, such as UV-spectroscopy, IR-spectroscopy, Raman spectroscopy, quantitative mass spectroscopy, or gas chromatography.

In another embodiment, the compositions or medicaments including co-crystals, solvates, and polymorphs described herein can be compared with free form modafinil as found in PROVIGIL® (Cephalon, Inc.). (See US Reissued Patent No. RE37,516) For example, the bioavailability of a composition or medicament of the present invention can be compared with that of PROVIGIL. As embodiments of the present invention, solubility can be increased 2,3,4, 5, 7,10,15,20,25, 50, 75, or 100 times by making a co-crystal of the reference form (e.g., crystalline or amorphous free form, hydrate or solvate). Further aqueous solubility can be measured in simulated gastric fluid (SGF) or simulated intestinal fluid (SIF) rather than water. SGF (non-diluted) of the present invention is made by combining 1 g/L Triton X-100 and 2 g/L NaCl in water and adjusting the pH with 20 mM HC1 to obtain a solution with a final pH=1.7 SIF is 0.68% monobasic potassium phosphate, 1% pancreatin, and sodium hydroxide where the pH of the final solution is 7.5. The pH of the solvent used may also be specified as 1,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9, 2,2.1,2.2, 2.3,2.4, 2.5,2.6, 2.7,2.8,2.9,3, 3.5,4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9,9.5, 10, 10.5,11, 11.5, or 12, or any pH in between successive values.

Examples of embodiments includes: co-crystal compositions with an aqueous solubility, at 37 degrees C and a pH of 7.0, that is increased at least 5 fold over the reference form, co-crystal compositions with a solubility in SGF that is increased at least 5 fold over the reference form, co-crystal compositions with a solubility in SIF that is increased at least 5 fold over the reference form.

Dissolution Modulation In another aspect described herein, the dissolution profile of modafinil is modulated whereby the aqueous dissolution rate or the dissolution rate in simulated gastric fluid or in simulated intestinal fluid, or in a solvent or plurality of solvents is increased. Dissolution rate is the rate at which API solids dissolve in a dissolution medium. For APIs whose absorption rates are faster than the dissolution rates (e.g., steroids), the rate-limiting step in the absorption process is often the dissolution rate. Because of a limited residence time at the absorption site, APIs that are not dissolved before they are removed from intestinal absorption site are considered useless. 26 intellectual property office of im.z. 2 6 may 2009 [received 545133 Therefore, the rate of dissolution has a major impact on the performance of APIs that are poorly soluble. Because of this factor, the dissolution rate of APIs in solid dosage forms is an important, routine, quality control parameter used in the API manufacturing process. The following equation is an approximation, Dissolution rate = KS(Cs-C) where IC is dissolution rate constant, S is the surface area, Cs is the apparent solubility, and C is the concentration of API in the dissolution medium.

For rapid API absorption, Cs-C is approximately equal to Cs The dissolution rate of modafinil may be measured by conventional means known in the art.

The increase in the dissolution rate of a co-crystal, as compared to the reference form (e.g., free form), may be specified, such as by 10, 20, 30,40, 50, 60, 70, 80, 90, or 100%, or by 2,3,4,5 ,6, 7, 8, 9, io, 15,20,25, 30, 40, 50, 75, 100, 125, 150,175,200,250, 300, 350,400,500, 1000,10,000, or 100,000 fold greater than the reference form (e.g., free form) in the same solution. Conditions under which the dissolution rate is measured are the same as discussed above. The increase in dissolution may be further specified by the time the composition remains supersaturated before reaching equilibrium solubility.

In a further aspect, herein described is a process for modulating the dissolution of modafinil, whereby the aqueous dissolution rate or the dissolution rate in simulated gastric fluid or in simulated intestinal fluid, or in a solvent or plurality of solvents is increased, which process comprises: (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution Hie modafinil with the co-crystal former under ciystallization conditions, so as to form a solid phase; and (d) isolating co-crystals comprising the modafinil and the co-crystal former. 27 INTELLECTUAL PROPERTY OFFICE OF N.Z. 2 s may 2009 received 545133 Examples of above embodiments include: co-crystal compositions with a dissolution rate in aqueous solution, at 37 degrees C and a pH of 7.0, that is increased at least 5 fold over the reference form, co-crystal compositions with a dissolution rate in SGF that is increased at least 5 fold over the reference form, co-crystal compositions with a dissolution rate in SIF that is increased at least 5 fold over the reference form.

Bioavailability Modulation The methods described herein are used to make a pharmaceutical modafinil formulation with greater solubility, dissolution, and bioavailability. Bioavailability can be improved via an increase in AUC, reduced time to Tmax: (the time to reach peak blood serum levels), or increased Cmax. The present invention can result in higher plasma concentrations of modafinil when compared to the free form (reference form).

AUC is the area under the plot of plasma concentration of API (not logarithm of the concentration) against time after API administration. The area is conveniently determined by the "trapezoidal rule": The data points are connected by straight line segments, perpendiculars are erected from the abscissa to each data point, and the sum of the areas of the triangles and trapezoids so constructed is computed. When the last measured concentration (Cn, at time t„) is not zero, the AUC from t„ to infinite time is estimated by C„/ke|.

The AUC is of particular use in estimating bioavailability of APIs, and in estimating total clearance of APIs (Clr). Following single intravenous doses, AUC = D/C1t, for single compartment systems obeying first-order elimination kinetics, where D is the dose; alternatively, AUC = Co/kei, where kei is the API elimination rate constant. With routes other than the intravenous, AUC = F - D/C1t, where F is the absolute bioavailability of the API.

Also described is a process for modulating the bioavailability of modafinil, whereby the AUC is increased, the time to Tmax is reduced, the length of time the concentration of modafinil is above 14 Tmax is increased, or Cmax is increased, which process comprises: (a) providing modafinil; 28 'NTEnpSr^Akc-PR0PERTY OFF/ge OF N.Z. 2 6 may 2009 DCPCIi/r WO 2005/0231')8 545133 (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-crystals comprising the modafinil and the co-crystal former.

Examples of the above embodiments include: co-crystal compositions with a time to Tmax that is increased by at least 5% as compared to the reference form, co-crystal compositions with a time to Tmax that is increased by at least 10% over the reference form, co-crystal compositions with a time to Tmax that is increased by at least 15% over the reference form, co-crystal compositions with a time to Tmax that is increased by at least 20% over the reference form, co-crystal compositions with a Tmax that is increased by at least 25% over the reference form, co-crystal compositions with a Tmax that is increased by at least 30% over the reference form, co-crystal compositions with a Tmax that is increased by at least 35% over the reference form, co-crystal compositions with a Tmax that is increased by at least 40% over the reference form, co-crystal compositions with an AUC that is increased by at least 5% over the reference form, co-crystal compositions with an AUC that is increased by at least 10% over the reference form, co-crystal compositions with an AUC that is increased by at least 15% over the reference form, co-crystal compositions with an AUC that is increased by at least 20% over the reference form, co-crystal compositions with an AUC that is increased by at least 25% over the reference form, co-crystal compositions with an AUC that is increased by at least 30% over the reference form, co-crystal compositions with an AUC that is increased by at least 35% over the reference form, co-crystal compositions with an AUC that is increased by at least 40% over the reference form. Other examples include wherein the reference form is crystalline, wherein the reference form is amorphous, or wherein the reference form is an anhydrous crystal form of modafinil. 29 545133 Dose Response Modulation In a further aspect,; herein described is a process for modulating the dose response of modafinil for use in a pharmaceutical composition or medicament, which process comprises: (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-ciystals comprising the modafinil and the co-crystal former.

Dose response is the quantitative relationship between the magnitude of response and the dose inducing the response and may be measured by conventional means known in the art. The curve relating effect (as the dependent variable) to dose (as the independent variable) for an API-cell system is the "dose-response curve". Typically, the dose-response curve is the measured response to an API plotted against the dose of the API (mg/kg) given. The dose response curve can also be a curve of AUC against the dose of the API given.

In an embodiment of the present invention, a co-crystal of the present invention has an increased dose response curve or a more linear dose response curve than the corresponding reference compound.

Increased Stability In a still further aspect herein described is a process for improving the stability of modafinil (as compared to a reference form such as its free form), which process comprises: (a) providing modafinil; (b) providing a co-ciystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; intellectual property OFFICE OF N.Z. 2 6 may 2003 R EC EIVP n 545133 (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and (d) isolating co-crystals comprising the modafinil and the co-crystal former.

In a preferred embodiment, the compositions described herein, including modafinil co-crystals, solvates, and formulations comprising modafinil, are suitably stable for pharmaceutical use. Preferably, modafinil or formulations thereof, of the present invention, are stable such that when stored at 30 degrees C for 2 years, less than 0.2 % of any one degradant is formed. The term degradant refers herein to product(s) of a single type of chemical reaction. For example, if a hydrolysis event occurs that cleaves a molecule into two products, for the purpose of the present invention, it would be considered a single degradant More preferably, when stored at 40 degrees C for 2 years, less than 0.2 % of any one degradant is formed. Alternatively, when stored at 30 degrees C for 3 months, less than 0.2 % or 0.15 %, or 0.1 % of any one degradant is formed, or when stored at 40 degrees C for 3 months, less than 0.2 % or 0,15 %, or 0.1 % of any one degradant is formed. Further alternatively, when stored at 60 degrees C for 4 weeks, less than 0.2 % or 0.15 %, or 0.1 % of any one degradant is formed. The relative humidity (RH) may be specified as ambient RH, 75 % RH, or as any single integer between 1 to 99 % RH. In another embodiment, a single dose of the present invention comprises less than 0.5 %, 0.2 %, or 0.1 % degradants upon administration to a subject.

Morphology Modulation In a still further aspect, herein described is a process for modifying the morphology of modafinil, which process compl ises: (a) providing modafinil; (b) providing a co-crystal former compatible with a functional group of modafinil such that the co-crystal former and the modafinil can form a co-crystal; (c) grinding, heating, co-subliming, co-melting, or contacting in solution the modafinil with the co-crystal former under crystallization conditions, so as to form a solid phase; and 31 2 6 MAY 2009 RE C E-M/FD WO 2005/0231<>8 545133 (d) isolating co-crystals comprising the modafinil and the co-crystal former.

In an embodiment the co-crystal comprises or consists of modafinil and a co-crystal former wherein the interaction between the two, e.g., H-bonding, occurs between the amino group of modafinil and a co-crystal former with a corresponding interacting group of Table III. In a further embodiment, the co-crystal comprises modafinil and a co-crystal former of Table I or II. In an aspect of the invention, only co-crystals having an H-bond acceptor on the first molecule and an H-bond donor on the second molecule, where the first and second molecules are either co-crystal former and modafinil respectively, or modafinil and co-crystal former respectively, are included in the present invention.

A co-crystal can comprise more than two chemical entities within its co-crystalline structure. For example, a co-crystal can further comprise a solvent molecule, a water molecule, a salt, etc. In addition, a co-crystal can comprise an API and two or more co-crystal formers, a co-crystal former and two or more APIs, two or more APIs, or two or more co-crystal formers.

As defined herein, a ternary co-crystal is a co-crystal which comprises three distinct chemical entities in a stoichiometric ratio, where each is a solid at room temperature (with the exception that the API may be a liquid at room temperature). Specifically, a ternary co-crystal comprises three distinct chemical entities such as API:co-crystal former(l):co-crystal former(2), where the ratio of components can be, for example, but not limited to, 1:1:1,2:1:1,2:1:2,2:1:0.5,2:2:1, etc. Ternary co-crystals can also comprise other combinations of components such as, but not limited to, API(l):API(2):co-crystal former, API(1):API(2):API(3), and co-crystal former(l):co-ciystal former(2):co-crystal former(3).

In another embodiment, the present invention provides a co-crystal comprising modafinil and a co-crystal former selected from the group consisting of: malonic acid, glycolic acid, fumaric acid, tartaric acid, citric acid, succinic acid, gentisic acid, oxalic acid, l-hydroxy-2-naphthoic acid, orotic acid, glutaric acid, L-tartaric acid, palmitic acid, L-proline, salicylic acid, lauric acid, L-malic acid, and maleic acid.

In further embodiments, the present invention provides the following co-crystals: modafinikmalonic acid, modafinil :glycolic acid, modafinihmaleic acid, modafinil:L-tartaric acid, modafinilxitric acid, modafiniksuccinic acid, 32 545133 modafinilzDL-tartaric acid, modafinikfumaric acid (Form I), modafinikfumaric acid (Form II), modafinifcgentisic acid, modafmikoxalic acid, modafinil: l-hydroxy-2-naphthoic acid, R-(-)-modafinil:maIonic acid, R-(-)-modafinil succinic acid, R-(-)-modafinilrcitric acid, R-(-)-modafinil:DL-tartaric acid, R-(-)-modafinil:l-hydroxy-2-naphthoic acid, R-(-)-modafinil:orotic acid, R-(-)-modafmil:glutaric acid, R-(-)-modafiniI:L-tartaric acid, R-(-)-modafinil:palmitic acid, F.-(-)-modafmil:L-proline, R-(-)-modafmil:salicylic acid, R-(-)-modafmil:lauric acid, R-(-)-modafinil:L-malic acid, and R-(-)-modafinil:gentisic acid.

Also described is a novel polymorph or co-crystal of racemic modafinil (form VII).

Also described are the following modafinil solvates: acetic acid, tetrahydrofuran, 1,4-dioxane, methanol, nitromethane, acetone, o-xylene, benzene, and toluene.

Pharmaceutical^ acceptable co-crystals can be administered by controlled- or delayed-release means. Controlled-release pharmaceutical products have a common goal of improving drug therapy over that achieved by their non-controlled release counterparts. Ideally, the use of an optimally designed controlled-release preparation in medical treatment is characterized by a minimum of drug substance being employed to cure or control the condition in a minimum amount of time. Advantages of controlled-release formulations include: 1) extended activity of the drug; 2) reduced dosage frequency; 3) increased patient compliance; 4) usage of less total drug; 5) reduction in local or systemic side effects; 6) minimization of drug accumulation; 7) reduction in blood level fluctuations; 8) improvement in efficacy of treatment; 9) reduction of potentiation or loss of drug activity; and 10) improvement in speed of control of diseases or conditions. (Kim, Cherng-ju, Controlled Release Dosage Form Design, 2 Technomic Publishing, Lancaster, Pa.: 2000).

Conventional dosage forms generally provide rapid or immediate drug release from the formulation. Depending on the pharmacology and pharmacokinetics of the drug, use of conventional dosage forais can lead to wide fluctuations in the concentrations of the drug in a patient's blood and other tissues. These fluctuations can impact a number of parameters, such as dose frequency, onset of action, duration of efficacy, maintenance of therapeutic blood levels, toxicity, side effects, and the like. Advantageously, controlled-release formulations can be used to control a drug's onset of action, duration of action, plasma levels within the therapeutic window, and 33 VFFIQE OF N.Z. 2 6 may 2009 545133 peak blood levels. In particular, controlled- or extended-release dosage forms or formulations can be used to ensure that the maximum effectiveness of a drug is achieved while minimizing potential adverse effects and safety concerns, which can occur both from under dosing a drug (i.e., going below the minimum therapeutic levels) as well as exceeding the toxicity level for the drug.

Most controlled-release formulations are designed to initially release an amount of drug (active ingredient) that promptly produces the desired therapeutic effect, and gradually and continually release other amounts of drug to maintain this level of therapeutic or prophylactic effect over an extended period of time. In order to maintain this constant level of drug in the body, the drug must be released from the dosage form at a rate that will replace the amount of drug being metabolized and excreted from the body. Controlled-release of an active ingredient can be stimulated by various conditions including, but not limited to, pH, ionic strength, osmotic pressure, temperature, enzymes, water, and other physiological conditions or compounds.

A variety of known controlled- or extended-release dosage forms, formulations, and devices can be adapted for use with the co-ciystals and compositions of the invention. Examples include, but are not limited to, those described in U.S. Pat Nos.: 3,845,770; 3,916,899; 3,536,809; 3,598,123; 4,008,719; 5,674,533; 5,059,595; 5,591,767; 5,120,548; 5,073,543; 5,639,476; 5,354,556; 5,733,566; and 6,365,185 Bl; each of which is incorporated herein by reference. These dosage forms can be used to provide slow or controlled-release of one or more active ingredients using, for example, hydroxypropylmethyl cellulose, other polymer matrices, gels, permeable membranes, osmotic systems (such as OROS® (Alza Corporation, Mountain View, Calif. USA)), multilayer coatings, microparticles, liposomes, or microspheres or a combination thereof to provide the desired release profile in varying proportions. Additionally, ion exchange materials can be used to prepare immobilized, adsorbed co-crystals and thus effect controlled delivery of the drug. Examples of specific anion exchangers include, but are not limited to, Duolite® A568 and Duolite® AP143 (Rohm & Haas, Spring House, PA. USA).

One embodiment described. encompasses a unit dosage form which comprises a pharmaceutically acceptable co-crystal, or a solvate, hydrate, dehydrate, v anhydrous, or amorphous form thereof and one or more pharmaceutically acceptable 545133 excipients or diluents, wherein the pharmaceutical composition, medicament or dosage form is formulated for controlled-release. Specific dosage forms utilize an osmotic drug delivery system.

A particular and well-known osmotic drug delivery system is referred to as OROS® (Alza Corporation, Mountain View, Calif. USA). This technology can readily be adapted for the delivery of compounds and compositions of the invention. Various aspects of the technology are disclosed in U.S. Pat. Nos. 6,375,978 Bl; 6,368,626 Bl; 6,342,249 Bl; 6,333,050 B2; 6,287,295 Bl; 6,283,953 Bl; 6,270,787 Bl; 6,245,357 Bl; and 6,132,420; each of which is incorporated herein by reference. Specific adaptations of OROS® that can be used to administer compounds and compositions of the invention include, but are not limited to, the OROS® Push-Pull™, Delayed Push-Pull™, Multi-Layer Push-Pull™, and Push-Stick™ Systems, all of which are well known. See, e.g., http://www.alza.com. Additional OROS® systems that can be used for the controlled oral delivery of compounds and compositions of the invention include ORQS®-CT and L-OROS®. Id.; see also, Delivery Times, vol. II, issue II (Alza Corporation).

Conventional OROS® oral dosage forms are made by compressing a drug powder (e.g. co-crystal) into a hard tablet, coating the tablet with cellulose derivatives to form a semi-permeable membrane, and then drilling an orifice in the coating (e.g., with a laser). Kim, Cherng-ju, Controlled Release Dosage Form Design, 231-238 (Technomic Publishing, Lancaster, Pa.: 2000). The advantage of such dosage forms is that the delivery rate of the drug is not influenced by physiological or experimental conditions. Even a drug with a pH-dependent solubility can be delivered at a constant rate regardless of the pH of the delivery medium. But because these advantages are provided by a build-up of osmotic pressure within the dosage form after administration, conventional OROS® drug delivery systems cannot be used to effectively deliver drugs with low water solubility. Id. at 234. Because co-crystals of this invention can be far more soluble in water than modafinil itself, they are well suited for osmotic-based delivery to patients. This invention does, however, encompass the incorporation of conventional crystalline modafinil (e.g. pure modafinil without co-crystal former), and isomers and isomeric mixtures thereof, into OROS® dosage forms. 545133 A specific dosage form comprises: a wail defining a the wall having an exit orifice formed or formable therein and at least a portion of the wall being semipermeable; an expandable layer located within the cavity remote from the exit orifice and in fluid communication with the semipermeable portion of the wall; a diy or substantially dry state drug layer located within the cavity adjacent to the exit orifice and in direct or indirect contacting relationship with the expandable layer; and a flow-promoting layer interposed between the inner surface of the wall and at least the external surface of the drug layer located within the cavity, wherein the drug layer comprises a co-crystal, or a solvate, hydrate, dehydrate, anhydrous, or amorphous form thereof. See U.S. Pat. No. 6,368,626, the entirety of which is incorporated herein by reference.

Another specific dosage form Comprises: a wall defining a cavity, cavity, the wall having an exit orifice formed or formable therein and at least a portion of the wall being semipermeable; an expandable layer located within the cavity remote from the exit orifice and in fluid communication with the semipermeable portion of the wall; a drug layer located within the cavity adjacent the exit orifice and in direct or indirect contacting relationship with the expandable layer; the drug layer comprising a liquid, active agent formulation absorbed in porous particles, the porous particles being adapted to resist compaction forces sufficient to form a compacted drug layer without significant exudation of the liquid, active agent formulation, the dosage form optionally having a placebo layer between the exit orifice and the drug layer, wherein the active agent formulation comprises a co-ciystal, or a solvate, hydrate, dehydrate, anhydrous, or amorphous form thereof. See U.S. Pat. No. 6,342,249, the entirety of which is incorporated herein by reference.

In another embodiment, a pharmaceutical composition or medicament comprises a mixture of a novel form of modafinil of the present invention (e.g., a co-ciystal) and the free form of modafinil. This embodiment can be used, for example, as a controlled-, sustained-, or extended-release dosage form. In another embodiment, an extended-release dosage form comprises free form modafinil and a co-crystal or a solvate of the present invention. Such an extended-release dosage form contains modafinil in a form (e.g. modafinihmalonic acid co-crystal) which has a greater bioavailability than that of free form modafinil. In addition, the Cmax of such a form can be greater than that of free form modafinil, facilitating a therapeutic effect with longer duration than free form modafinil alone. 36 WO 2005/0231')8 545133 In another embodiment, a pharmaceutical composition or medicament comprises a modified release profile of one or more of racemic modafinil, R-(-)-modafinil, and S-(+)-modafinil. The modified release profile can comprise, for example, two or more maxima of plasma concentration, such as a dual-release profile. Such a modified release profile may aid a patient treated with a composition or medicament of the present invention who experiences loss of wakefulness in the afternoon, for example. A second "burst" or release of API at least 2, 3,4,5, or 6 hours after administration may help to overcome such an effect. In another embodiment, a pharmaceutical composition or medicament comprising a small loading dose released immediately following administration can be employed, followed by an approximate zero-order release profile over the following 2,3, 4, 5, or 6 hours. In such a composition, peak plasma levels can be reached at about midday.

In another embodiment, a pharmaceutical composition or medicament comprising a modified release profile of modafinil can comprise R-(-)-modafinil and S-(+)-modafinil wherein the R-(-)-modafinil provides an initial increase (initial Cmax due to R-(-)-modafmil) in plasma concentration and the S-(+)-modafmil provides a delayed increase (subsequent Cmax due to S-(+)-modafinil) in plasma concentration. The delayed increase in Cmax due to S-(+)-modafinil can be 2, 3,4, 5, 6 hours or more after the initial Cmax due to R-(-)-modafinil. In another embodiment, the delayed Cmax is approximately equal to the initial Cmax. In another embodiment, the delayed Cmax is greater than the initial Cmax- In another embodiment, the delayed Cmax is less than the initial Cmax. In another embodiment, the delayed Cmax is due to racemic modafinil, instead of S-(+)-modafinil. In another embodiment, the delayed Cmax is due to R-(-)-modafmil, instead of S-(+)-modafinil. In another embodiment, the initial Cmax is due to racemic modafinil, instead of R-(-)-modafinil. In another embodiment, the initial Cmax is due to S-(+)-modafinil, instead of R-(-)-modafinil. In another embodiment, the modified release profile has 3, 4, 5, or more "bursts" in plasma concentration.

In another embodiment, a pharmaceutical composition or medicament comprising a modified release profile of modafinil wherein one or more of racemic modafinil, R-(-)-modafmil, or S-(+)-modafinil are present in the form of a co-crystal, solvate, free form, or a polymorph thereof.

In another embodiment, a pharmaceutical composition or medicament ' comprising a modified release profile wherein R-(-)-modafinil is used in an oral formulation. Such a composition can minimize first-pass metabolism of modafinil to 37 545133 the sulfone. In another embodiment, a pharmaceutical composition or medicament comprising a modified release profile wherein racemic modafinil is used in an oral formulation. In another embodiment, a pharmaceutical composition or medicament comprising a modified release profile wherein S-(+)-modafinil is used in an oral formulation. In another embodiment, a pharmaceutical composition or medicament comprising a modified release profile wherein racemic modafinil and R-(-)-modafinil are used in an oral formulation. In another embodiment, a pharmaceutical composition or medicament comprising a modified release profile wherein racemic modafinil and S-(+)-modafinil are used in an oral formulation. In another embodiment, a pharmaceutical composition or medicament comprising a modified release profile wherein S-(+)-modafinil and R-Q-modafinil are used in an oral formulation. In another embodiment, a pharmaceutical composition or medicament comprising a modified release profile wherein racemic modafinil, S-(+)-modafinil and R-(-)-modafinil are used in an oral formulation.

In another embodiment, a pharmaceutical composition or medicament comprising a modified release profile of modafinil is administered transdermally.

Such a transdermal (TD) delivery can avoid first-pass metabolism. Additionally, a "pill-and-patch" strategy can be taken, where only a fraction of the daily dose is delivered through the skin to generate basal systemic levels, onto which oral therapy is added to ensure the wakefulness effect.

Excipients employed in pharmaceutical compositions and medicaments of the present invention can be solids, semi-solids, liquids or combinations thereof. Preferably, excipients are solids. Compositions and medicaments described herein containing excipients can be prepared by known technique of pharmacy that comprises admixing an excipient with an API or therapeutic agent. A pharmaceutical composition or medicament contains a desired amount of API per dose unit and, if intended for oral administration, can be in the form, for example, of a tablet, a caplet, a pill, a hard or soft capsule, a lozenge, a cachet, a dispensable powder, granules, a suspension, an elixir, a dispersion, a liquid, or any other form reasonably adapted for such administration. If intended for parenteral administration, it can be in the form, for example, of a suspension or transdermal patch. If intended for rectal administration, it can be in the form, for example, of a suppository.

Presently preferred are oral dosage forms that are discrete dose units each containing a predetermined amount of the API, such as tablets or capsules. 38 545133 Non-limiting examples follow of excipients that can be used to prepare pharmaceutical compositions or medicaments as described herein.

Pharmaceutical compositions and medicaments optionally comprise one or more pharmaceutically acceptable carriers or diluents as excipients. Suitable carriers or diluents illustratively include, but are not limited to, either individually or in combination, lactose, including anhydrous lactose and lactose monohydrate; starches, including directly compressible starch and hydrolyzed starches (e.g., Celutab™ and Emdex™); mannitol; sorbitol; xylitol; dextrose (e.g., Cerelose™ 2000) and dextrose monohydrate; dibasic calcium phosphate dihydrate; sucrose-based diluents; confectioner's sugar; monobasic calcium sulfate monohydrate; calcium sulfate dihydrate; granular calcium lactate trihydrate; dextrates; inositol; hydrolyzed cereal solids; amylose; celluloses including microcrystalline cellulose, food grade sources of alpha- and amorphous cellulose (e.g., RexcelJ), powdered cellulose, hydroxypropylcellulose (HPC) and hydroxypropylmethylcellulose (HPMC); calcium carbonate; glycine; bentonite; block co-polymers; polyvinylpyrrolidone; and the like. Such carriers or diluents, if present, constitute in total about 5% to about 99%, preferably about 10% to about 85%, and more preferably about 20% to about 80%, of the total weight of the composition. The carrier, carriers, diluent, or diluents selected preferably exhibit suitable flow properties and, where tablets are desired, compressibility.

Lactose, mannitol, dibasic sodium phosphate, and microcrystalline cellulose (particularly Avicel PH microcrystalline cellulose such as Avicel PH 101), either individually or in combination, are preferred diluents. These diluents are chemically compatible with APIs. The use of extragranular microcrystalline cellulose (that is, microciystalline cellulose added to a granulated composition) can be used to improve hardness (for tablets) and/or disintegration time. Lactose, especially lactose monohydrate, is particularly preferred. Lactose typically provides compositions having suitable release rates of APIs, stability, pre-compression flowability, and/or drying properties at a relatively low diluent cost. It provides a high density substrate that aids densification during granulation (where wet granulation is employed) and therefore improves blend flow properties and tablet properties.

Pharmaceutical compositions and medicaments optionally comprise one or more pharmaceutically acceptable disintegrants as excipients, particularly for tablet formulations. Suitable disintegrants include, but are not limited 39 "mwfefpg»'Y 2 6 may 2009 received 545133 to, either individually or in combination, starches, including sodium starch glycolate (e.g., Explotab™ of PenWest) and pregelatinized corn starches (e.g., National™ 1551 of National Starch and Chemical Company, National™ 1550, and Colocorn™ 1500), clays (e.g., Veegum™ HV of R.T. Vanderbilt), celluloses such as purified cellulose, microcrystalline cellulose, methylcellulose, carboxymethylcellulose and sodium carboxymethylcellulose, croscarmellose sodium (e.g., Ac-Di-Sol™ of FMC), alginates, crospovidone. and gums such as agar, guar, locust bean, karaya, pectin and tragacanth gums.

Disintegrants may be added at any suitable step during the preparation of the composition, particularly prior to granulation or during a lubrication step prior to compression. Such disintegrants, if present, constitute in total about 0.2% to about 30%, preferably about 0.2% to about 10%, and more preferably about 0.2% to about 5%, of the total weight of the composition.

Croscarmellose sodium is a preferred disintegrant for tablet or capsule disintegration, and, if present, preferably constitutes about 0.2% to about 10%, more preferably about 0.2% to about 7%, and still more preferably about 0.2% to about 5%, of the total weight of the composition. Croscarmellose sodium confers superior intragranular disintegration capabilities to granulated pharmaceutical compositions and medicaments of the present invention.

Pharmaceutical compositions and medicaments optionally comprise one or more pharmaceutically acceptable binding agents or adhesives as excipients, particularly for tablet formulations. Such binding agents and adhesives preferably impart sufficient cohesion to the powder being tableted to allow for normal processing operations such as sizing, lubrication, compression and packaging, but still allow the tablet to disintegrate and the composition to be absorbed upon ingestion. Such binding agents may also prevent or inhibit ciystallization or recrystallization of an API of the present invention once the salt has been dissolved in a solution.

Suitable binding agents and adhesives include, but are not limited to, either individually or in combination, acacia; tragacanth; sucrose; gelatin; glucose; starches such as, but not limited to, pregelatinized starches (e.g., National™ 1511 and National™ 1500); celluloses such as, but not limited to, methylcellulose and carmellose sodium (e.g., Tylose™); alginic acid and salts of alginic acid; magnesium aluminum silicate; PEG; guar gum; polysaccharide acids; bentonites; povidone, for example povidone K-15, K-30 and K-29/32; polymethacrylates; HPMC; 40 | intellectual property OPPIGF OF N2 2 6 may 2009 r e c eIV ED 545133 hydroxypropylcellulose (e.g., Klucel™ of Aqualon); and ethylcellulose (e.g., Ethocel™ of the Dow Chemical Company). Such binding agents and/or adhesives, if present, constitute in total about 0.5% to about 25%, preferably about 0.75% to about 15%, and more preferably about 1% to about 10%, of the total weight of the pharmaceutical composition or medicament.

Many of the binding agents are polymers comprising amide, ester, ether, alcohol or ketone groups and, as such, are preferably included in pharmaceutical compositions and medicaments of the present invention. Polyvinylpyrrolidones such as povidone K-30 are especially preferred. Polymeric binding agents can have varying molecular weight, degrees of crosslinking, and grades of polymer. Polymeric binding agents can also be copolymers, such as block co-polymers that contain mixtures of ethylene oxide and propylene oxide units. Variation in these units' ratios in a given polymer affects properties and performance. Examples of block copolymers with varying compositions of block units are Poloxamer 188 and Poloxamer 237 (BASF Corporation).

Pharmaceutical compositions and medicaments optionally comprise one or more pharmaceutically acceptable wetting agents as excipients. Such wetting agents are preferably selected to maintain the API in close association with water, a condition that is believed to improve bioavailability of the composition.

Non-limiting examples of surfactants that can be used as wetting agents in pharmaceutical compositions and medicaments of the invention include quaternaiy ammonium compounds, for example benzalkonium chloride, benzethonium chloride and cetylpyridinium chloride, dioctyl sodium sulfosuccinate, polyoxyethylene alkylphenyl ethers, for example nonoxynol 9, nonoxynol 10, and octoxynol 9, poloxamers (polyoxyethylene and polyoxypropylene block copolymers), polyoxyethylene fatty acid glycerides and oils, for example polyoxyethylene (8) caprylic/capric mono- and diglycerides (e.g., Labrasol™ of Gattefosse), polyoxyethylene (35) castor oil and polyoxyethylene (40) hydrogenated castor oil; polyoxyethylene alkyl ethers, for example polyoxyethylene (20) cetostearyl ether, polyoxyethylene fatty acid esters, for example polyoxyethylene (40) stearate, polyoxyethylene sorbitan esters, for example polysorbate 20 and polysorbate 80 (e.g., Tween™ 80 of ICI), propylene glycol fatty acid esters, for example propylene glycol laurate (e.g., Lauroglycol™ of Gattefosse), sodium iauryl sulfate, fatty acids and salts thereof, for example oleic acid, sodium oleate and triethanolamine oleate, glyceiyl 41 INTEnppircAktf,R0PERTY offigp of n.z. 2 6 may 2009 RECEIVFnl 545133 fatty acid esters, for example glyceiyl monostearate, sorbitan esters, for example sorbitan monolaurate, sorbitan monooleate, sorbitan monopalmitate and sorbitan monostearate, tyloxapol, and mixtures thereof. Such wetting agents, if present, constitute in total about 0.25% to about 15%, preferably about 0.4% to about 10%, and more preferably about 0.5% to about 5%, of the total weight of the pharmaceutical composition or medicament.

Wetting agents that are anionic surfactants are preferred. Sodium lauryl sulfate is a particularly preferred wetting agent. Sodium lauryl sulfate, if present, constitutes about 0.25% to about 7%, more preferably about 0.4% to about 4%, and still more preferably about 0.5% to about 2%, of the total weight of the pharmaceutical composition or medicament.

Pharmaceutical compositions and medicaments optionally comprise one or more pharmaceutically acceptable lubricants (including anti-adherents and/or glidants) as excipients. Suitable lubricants include, but are not limited to, either individually or in combination, glyceryl behapate (e.g., Compritol™ 888 of Gattefosse); stearic acid and salts thereof, including magnesium, calcium and sodium stearates; hydrogenated vegetable oils (e.g., Sterotex™ of Abitec); colloidal silica; talc; waxes; boric acid; sodium benzoate; sodium acetate; sodium fumarate; sodium chloride; DL-leucine; PEG (e.g., Carbowax™ 4000 and Carbowax™ 6000 of the Dow Chemical Company); sodium oleate; sodium lauryl sulfate; and magnesium lauryl sulfate. Such lubricants, if present, constitute in total about 0.1% to about 10%, preferably about 0.2% to about 8%, and more preferably about 0.25% to about 5%, of the total weight of the pharmaceutical composition or medicament.

Magnesium stearate is a preferred lubricant used, for example, to reduce friction between the equipment and granulated mixture during compression of tablet formulations.

Suitable anti-adherents include, but are not limited to, talc, cornstarch, DL-leucine, sodium lauryl sulfate and metallic stearates. Talc is a preferred anti-adherent or glidant used, for example, to reduce formulation sticking to equipment surfaces and also to reduce static in the blend. Talc, if present, constitutes about 0.1% to about 10%, more preferably about 0.25% to about 5%, Mid still more preferably about 0.5% to about 2%, of the total weight of the pharmaceutical composition or medicament.

Glidants can be used to promote powder flow of a solid formulation. Suitable glidants include, but are not limited to, colloidal silicon dioxide, starch, talc, tribasic 42 intellectual property OFFfGf OF M.z. 2 s may 2009 deceived 545133 calcium phosphate, powdered cellulose and magnesium trisilicate. Colloidal silicon dioxide is particularly preferred.

Other excipients such as colorants, flavors and sweeteners are known in the pharmaceutical art and can be used in pharmaceutical compositions and medicaments of the present invention. Tablets can be coated, for example with an enteric coating, or uncoated. Compositions of the invention can further comprise, for example, buffering agents.

Optionally, one or more effervescent agents can be used as disintegrants and/or to enhance organoleptic properties of pharmaceutical compositions and medicaments of the invention. When present in pharmaceutical compositions and medicaments of the invention to promote dosage form disintegration, one or more effervescent agents are preferably present in a total amount of about 30% to about 75%, and preferably about 45% to about 70%, for example about 60%, by weight of the pharmaceutical composition or medicament.

According to a particularly preferred embodiment, an effervescent agent, present in a solid dosage form in an amount less than that effective to promote disintegration of the dosage form, provides improved dispersion of the API in an aqueous medium. Without being bound by theory, it is believed that the effervescent agent is effective to accelerate dispersion of the API, from the dosage form in the gastrointestinal tract, thereby further enhancing absorption and rapid onset of therapeutic effect. When present in a pharmaceutical composition or medicament to promote intragastrointestinal dispersion but not to enhance disintegration, an effervescent agent is preferably present in an amount of about 1% to about 20%, more preferably about 2.5% to about 15%, and still more preferably about 5% to about 10%, by weight of the pharmaceutical composition or medicament.

An "effervescent agent" herein is an agent comprising one or more compounds which, acting together or individually, evolve a gas on contact with water. The gas evolved is generally oxygen or, most commonly, carbon dioxide. Preferred effervescent agents comprise an acid and a base that react in the presence of water to generate carbon dioxide gas. Preferably, the base comprises an alkali metal or alkaline earth metal carbonate or bicarbonate and the acid comprises an aliphatic carboxylic acid.

Non-limiting examples of suitable bases as components of effervescent agents useful in the invention include carbonate salts (e.g., calcium carbonate), bicarbonate 43 intcllectual property OFFIftT OF V 7 2 6 may 2009 * £ c p l \j p n 545133 salts (e.g., sodium bicarbonate), sesquicarbonate salts, and mixtures thereof. Calcium carbonate is a preferred base.

Non-limiting examples of suitable acids as components of effervescent agents and/or solid acids useful in the invention include citric acid, tartaric acid (as D-, L-, or D/L-tartaric acid), malic acid, maleic acid, fumaric acid, adipic acid, succinic acid, acid anhydrides of such acids, acid salts of such acids, and mixtures thereof. Citric acid is a preferred acid.

In a preferred embodiment where the effervescent agent comprises an acid and a base, the weight ratio of the acid to the base is about 1:100 to about 100:1, more preferably about 1:50 to about 50:1, and still more preferably about 1:10 to about 10:1. In a further preferred embodiment of the invention, where the effervescent agent comprises an acid and a base, the ratio of the acid to the base is approximately stoichiometric.

Excipients which solubilize metal salts of APIs typically have both hydrophilic and hydrophobic regions, or are preferably amphiphilic or have amphiphilic regions. One type of amphiphilic or partially-amphiphilic excipient comprises an amphiphilic polymer or is an amphiphilic polymer. A specific amphiphilic polymer is a polyalkylene glycol, which is commonly comprised of ethylene glycol and/or propylene glycol subunits. Such polyalkylene glycols can be esterified at their termini by a carboxylic acid, ester, acid anhyride or other suitable moiety. Examples of such excipients include poloxamers (symmetric block copolymers of ethylene glycol and propylene glycol; e.g., poloxamer 237), polyalkyene glycolated esters of tocopherol (including esters formed from a di- or multi-ftinctional carboxylic acid; e.g., d-alpha-tocopherol polyethylene glycol-1000 succinate), and macrogoiglycerides (formed by alcoholysis of an oil and esterification of a polyalkylene glycol to produce a mixture of mono-, di- and tri-glycerides and mono- and di-esters; e.g., stearoyl macrogol-32 glycerides). Such pharmaceutical compositions and medicaments are advantageously administered orally.

Pharmaceutical compositions and medicaments can comprise about 10% to about 50%, about 25% to about 50%, about 30% to about 45%, or about 30% to about 35% by weight of API; about 10% to about 50%, about 25% to about 50%, about 30% to about 45%, or about 30% to about 35% by weight of a an excipient which inhibits ciystallizatton; and about 5% to about 50%, about 10% to about 40%, about 15% to about 35%, or about 30% to about 35% by weight of a 44 Wllectual prop OFFlhf: OF N.Z.

PROPER! 2 6 mm 2009 received 545133 binding agent In one example, the weight ratio of the API to the excipient which inhibits crystallization to binding agent is about I to 1 to 1.

Solid dosage forms can be prepared by any suitable process, not limited to processes described herein.

An illustrative process comprises (a) a step of blending a salt of the invention with one or more excipients to form a blend, and (b) a step of tableting or encapsulating the blend to form tablets or capsules, respectively.

In a preferred process, solid dosage forms are prepared by a process comprising (a) a step of blending an API salt of the invention with one or more excipients to form a blend, (b) a step of granulating the blend to form a granulate, and (c) a step of tableting or encapsulating the blend to form tablets or capsules respectively. Step (b) can be accomplished by any dry or wet granulation technique known in the art, but is preferably a dry granulation step. A salt of the present invention is advantageously granulated to form particles of about 1 micrometer to about 100 micrometer, about 5 micrometer to about 50 micrometer, or about 10 micrometer to about 25 micrometer. One or more diluents, one or more disintegrants and one or more binding agents are preferably added, for example in the blending step, a wetting agent can optionally be added, for example in the granulating step, and one or more disintegrants are preferably added after granulating but before tableting or encapsulating. A lubricant is preferably added before tableting. Blending and granulating can be performed independently under low or high shear. A process is preferably selected that forms a granulate that is uniform in API content, that readily disintegrates, that flows with sufficient ease so that weight variation can be reliably controlled during capsule filling or tableting, and that is dense enough in bulk so that a batch can be processed in the selected equipment and individual doses fit into the specified capsules or tablet dies.

In an alternative embodiment, solid dosage forms are prepared by a process that includes a spray drying step, wherein the API is suspended with one or more excipients in one or more sprayable liquids, preferably a non-protic (e.g., non-aqueous or non-alcoholic) sprayable liquid, and then is rapidly spray dried over a current of warm air.

A granulate or spray dried powder resulting from any of the above illustrative processes can be compressed or molded to prepare tablets or encapsulated to prepare capsules. Conventional tableting and encapsulation techniques known in the art can 45 | 2 6 MAY 2009 i [receive d 545133 be employed. Where coated tablets arc desired, conventional coating techniques are suitable.

Excipients for tablet compositions of the invention are preferably selected to provide a disintegration time of less than about 30 minutes, preferably about 25 minutes or less, more preferably about 20 minutes or less, and still more preferably about 15 minutes or less, in a standard disintegration assay.

In another embodiment a pharmaceutical composition or medicament comprising modafinil and an additional API can be prepared. The modafinil and the additional API can be in the form of a co-crystal, or may be included as a mixture or a combination of active pharmaceutical ingredients. For example, a composition can comprise modafinil and caffeine as a combination. A composition comprising modafinil and caffeine can be used as a therapeutic agent to treat the same conditions as modafinil. In such a composition comprising modafinil and caffeine, the caffeine can yield a quick release characteristic (small Tmax relative to modafinil) to the dissolution profile while the modafinil causes the therapeutic effect to be present for hours after administration. For example, the Tmax of caffeine may be 0.001,0.01, 0.05,0.1,0.2,0.3,0.4,0.5,0.6, 0.7, or 0.8 times that of modafinil. Combination therapies comprise the administration of two or more APIs in the same formulation, or in two or more co-administered formulations. The APIs can be administered together at the same time, or individually at specified intervals.

Uses for modafinil are well known in the art and include the treatment of narcolepsy, multiple sclerosis related fatigue, infertility, eating disorders, attention deficit hyperactivity disorder (ADHD), Parkinson's disease, incontinence, sleep apnea, or myopathies. In another embodiment, any one or more of the modafinil compositions1 described herein may be used in the treatment of one or more of the above conditions. The dosage and administration for modafinil compositions can be determined using routine methods in the art but will generally fall between about 50 and about 700 mg/day.

In another embodiment, a composition can be administered to a mammal via an injection. Injections include, but are not limited to, intravenous, subcutaneous, and intramuscular injections. In another embodiment, a composition is formulated for injection into a mammal in need of therapeutic effect 46 ^,ELnL|CTUAL PROPERTY] OFR£f OF N.Z. 2 6 may 2009 WO 2005/023198 PCT/US2004/029013 EXAMPLES General Methods for the Preparation of Co-Crvstals a) High Throughput crystallization using the CrystalMax® platform CrystalMax® comprises a sequence of automated, integrated high throughput robotic stations capable of rapid generation, identification and characterization of polymorphs, salts, and co-crystals of APIs and API candidates. Worksheet generation and combinatorial mixture design is carried out using proprietary design software Architect™. Typically, an API or an API candidate is dispensed from an organic solvent into tubes and dried under a stream of nitrogen. Salts and/or co-crystal formers may also be dispensed and dried in the same fashion. Water and organic solvents may be combinatorially dispensed into the tubes using a multi-channel dispenser. Each tube in a 96-tube array is then sealed within 15 seconds of combinatorial dispensing to avoid solvent evaporation. The mixtures are then rendered supersaturated by heating to 70 degrees C for 2 hours followed by a 1 degree C/minute cooling ramp to 5 degrees C. Optical checks are then conducted to detect crystals and/or solid material. Once a solid has been identified in a tube, it is isolated through aspiration and drying. Raman spectra are then obtained on the solids and cluster classification of the spectral patterns is performed using proprietary software (Inquire™). b) Crystallization from solution Co-crystals may be obtained by dissolving the separate components in a solvent and adding one to the other. The co-crystal may then precipitate or crystallize as the solvent mixture is evaporated slowly. The co-crystal may also be obtained by dissolving the two components in the same solvent or a mixture of solvents. The co-crystal may also be obtained by seeding a saturated solution of the two components and seeding with a ground mixture of the co-crystal. c) Crystallization from the melt (Co-melting) 47 545133 A co-crystal may be obtained by melting the two components together (i.e., co-melting) and allowing recrystallization to occur. In some cases, an anti-solvent may be added to facilitate crystallization. d) Thermal microscopy A co-crystal may be obtained by melting the higher melting component on a glass slide and allowing it to recrystallize. The second component is then melted and is also allowed to recrystallize. The co-crystal may form as a separated phase/band in between the eutectic bands of the two original components. e) Mixing and/or grinding A co-crystal may be obtained by mixing or grinding two components together in the solid state. For example, Example 12 describes the synthesis of a modafinil: 1-hydroxy-2-naphthoic acid co-crystal obtained by milling with the addition of a small amount of an appropriate solvent (wet grinding). Similarly, Example 5 describes the synthesis of a modafmil:citric acid monohydrate co-crystal obtained by milling both with and without the addition of a small amount of an appropriate solvent. In one embodiment, a co-crystal is prepared via milling or grinding modafinil with a co-crystal former (dry grinding). In another embodiment, a co-crystal is prepared via milling or grinding modafinil, a co-crystal former, and a small amount of solvent (wet grinding).

In another embodiment, a co-crystal is prepared with the addition of solvent, without the addition of solvent, or both. Solvents used in such a co-crystallization process can be, for example, but not limited to, acetone, methanol, ethanol, isopropyl alcohol, ethyl acetate, isopropyl acetate, nitromethane, dichloromethane, chloroform, toluene, propylene glycol, dimethyl sulfoxide (DMSO), dimethyl formamide (DMF), diethyl ether (ether), ethyl formate, hexane, acetonitrile, benzyl alcohol, water, or another organic solvent including alcohols. f) Co-sublimation A co-crystal may be obtained by co-subliming a mixture of an API and a co-crystal former in the same sample cell as an intimate mixture either by heating, mixing or placing the mixture under vacuum. A co-crystal may also be obtained by co-sublimation using a Kneudsen apparatus where the API and the co-crystal former are 48 545133 contained in separate sample cells, connected to a single cold finger, each of the sample cells is maintained at the same or different temperatures under a vaccutn atmosphere in order to co-sublime the two components onto the cold-finger forming the desired co-crystal.

Analytical Methods Differential scanning calorimetric (DSC) analysis of the samples was performed using a Q1000 Differential Scanning Calorimeter (TA Instruments, New Castle, DE, U.S.A.), which uses Advantage for QW-Series, version 1.0.0.78, Thermal Advantage Release 2.0 (2001 TA Instruments-Water LLC). In addition, the analysis software used was Universal Analysis 2000 for Windows 95/98/2000/NT, version 3.1E;Build 3.1.0.40 (2001 TA Instruments-Water LLC).

For the DSC analysis, the purge gas used was dry nitrogen, the reference material was an empty aluminum pan that was crimped, and the sample purge was 50 mL/minute.

DSC analysis of the sample was performed by placing the modafinil sample in an aluminum pan with a crimped pan closure. The starting temperature was typically 20 degrees C with a heating rate of 10 degrees C/minute, and the ending temperature was 200 degrees C. All reported DSC transitions represent the temperature of endothermic or exothermic transition at their respective peaks with an error of +/- 2 degrees C, unless otherwise indicated.

Thermogravimetric analysis (TGA) of samples was performed using a Q500 Thermogravimetric Analyzer (TA Instruments, New Castle, DE, U.S.A.), which uses Advantage for QW-Series, version 1.0.0.78, Thermal Advantage Release 2.0 (2001 TA Instruments-Water LLC). In addition, the analysis software used was Universal Analysis 2000 for Windows 95/98/2000/NT, version 3.1E;Build 3.1.0.40 (2001 TA Instruments-Water LLC).

For the TGA experiments, the purge gas used was dry nitrogen, the balance purge was 40 mL/minute N2, and the sample purge was 60 mL/minute N2.

TGA was performed on the sample by placing the modafinil sample in a platinum pan. The starting temperature was typically 20 degrees C with a heating rate of 10 degrees C/minute, and the ending temperature was 300 degrees C. 49 WO 2005/0231')8 545133 A powder X-ray diffraction (PXRD) pattern for the samples was obtained using a D/Max Rapid, Contact (Rigaku/MSC, The Woodlands, TX, U.S.A.), which uses as its control software RINT Rapid Control Software, Rigaku Rapid/XRD, version 1.0.0 (1999 Rigaku Co.). In addition, the analysis software used were RENT Rapid display software, version 1.18 (Rigaku/MSC), and JADE XRD Pattern Processing, versions 5.0 and 6.0 ((1995-2002, Materials Data, Inc.).

For the PXRD analysis, the acquisition parameters were as follows: source was Cu with a K line at 1.5406 A; x-y stage was manual; collimator size was 0.3 mm; capillary tube (Charles Supper Company, Natick, MA, U.S.A.) was 0.3 mm ID; reflection mode was used; the power to the X-ray tube was 46 kV; the current to the X-ray tube was 40 mA; the omega-axis was oscillating in a range of 0-5 degrees at a speed of 1 degree/minute; the phi-axis was spinning at an angle of 360 degrees at a speed of 2 degrees/second; 0.3 mm collimator; the collection time was 60 minutes; the temperature was room temperature; and the heater was not used. The sample was presented to the X-ray source in a boron rich glass capillary.

In addition, the analysis parameters were as follows: the integration 2-theta range was 2-60 degrees; the integration chi range was 0-360 degrees; the number of chi segments was 1; the step size used was 0.02; the integration utility was cylint; normalization was used; dark counts were 8; omega offset was 180; and chi and phi offsets were 0.

PXRD diffractograms were also acquired via the Bruker AXS D8 Discover X-ray Diffractometer. This instrument was equipped with GADDS™ (General Area Diffraction Detection System), a Bruker AXS HI-STAR Area Detector at a distance of 15.05 cm as per system calibration, a copper source (Cu/Ka 1.54056 angstroms), automated x-y-z stage, and 0.5mm collimator. The sample was compacted into pellet form and mounted on the x-y-z stage. A diffractogram was acquired under ambient conditions (25 degrees C) at a powder setting of 40kV and 40mA in reflection mode while the sample remained stationary. The exposure time was varied and specified for each sample. The diffractogram obtained underwent a spatial remapping procedure to account for the geometrical pincushion distortion of the area detector then integrated along chi from -118.8 to -61.8 degrees and 2-theta 2.1-37 degrees at a step size of 0.02 degrees with normalization set to bin normalize.

The relative intensity of peaks in a diffractogram is not necessarily a limitation of the PXRD pattern because peak intensity can vary from sample to sample, e.g., due 50 545133 to crystalline impurities. Further, the angles of each peak can vary by about +/- 0.1 degrees, preferably +/- 0.05. The entire pattern or most of the pattern peaks may also shift by about +/- 0.1 degrees to about +/- 0.2 degrees due to differences in calibration, settings, and other variations from instrument to instrument and from operator to operator. All reported PXRD peaks in the Figures, Examples, and elsewhere herein are reported with an error of about ±0.1 degrees 2-theta.

For PXRD data herein, including Tables and Figures, each composition of the present invention may be characterized by any one, any two, any three, any four, any five, any six, any seven, or any eight or more of the 2 theta angle peaks. Any one, two, three, four, five, or six DSC transitions, can also be used to characterize the compositions of the present invention. The different combinations of the PXRD peaks and the DSC transitions can also be used to characterize the compositions.

Thermal (hotstage) microscopy was completed on a Zeiss Axioplan 2 microscope equipped with a Mettler Toledo FP90 controller. The hotstage used was a Mettler Toledo FP82HT. All melting point determinations were completed by placing the sample on a microscope slide and covered with a coverslip. The initial temperature was set at 30 degrees C and the temperature was increased at a rate of 10 degrees C/minute. Melting was observed through a 5x microscope objective.

HPLC Method: (adapted from Donovan et al. Therapeutic Drug Monitoring 25:197-202.

Column: Astec Cyclobond 12000 RSP 250x4.6mm (Part No. 411121) Mobile Phase A: 20 mM sodium phosphate, pH 3.0 B: 70:30 mobile phase A:acetonitrile Flow Rate: 1.0 mL/min (-1500 PSI) Flow Program: gradient Run Time: 35 minutes Detection: UV @ 225 ran Injection Volume: 10 microliters Column Temperature: 30 +/-1 degrees C Standard diluent: 90:10 (v/v) Mobile Phase A:acetonitrile Needle wash: acetonitrile 51 545133 Purge solvent & seal wash: 90:10 (v/v) water:acetonitrile Mobile Phase Preparation: 1. Prep 1 M sodium phosphate monobasic: dissolve 120 g of sodium phosphate monobasic in water and make up to 1000 mL; filter. 2. Prep Mobile Phase A (20 mM sodium phosphate, pH 3.0): for each liter, dilute 20 mL 1 M sodium phosphate to 1000 mL with water; adjust pH to 3.0 with phosphoric acid. 3. Prep Mobile Phase B (70:30 (v/v) 20 mM sodium phosphate, pH 3.0:acetonitrile): for each liter, mix 700 mL Mobile Phase A and 300 mL of acetonitrile.

Sample Prep: 1. Dissolve samples in 90:10 (v/v) 20 mM sodium phosphate, pH 3.0:acetonitrile to an approximate concentration of 20 micrograms/mL Raman Acquisitions The sample was either left in the glass vial in which it was processed or an aliquot of the sample was transferred to a glass slide. The glass vial or slide was positioned in the sample chamber. The measurement was made using an Almega™ Dispersive Raman (Almega™ Dispersive Raman, Thermo-Nicolet, 5225 Verona , Road, Madison, WI 53711-4495) system fitted with a 785 am laser source. The sample was manually brought into focus using the microscope portion of the apparatus with a lOx power objective (unless otherwise noted), thus directing the laser onto the surface of the sample. The spectrum was acquired using the parameters, outlined in Table A. (Exposure times and number of exposures may vary; changes to parameters will be indicated for each acquisition.) Table A. Raman Spectral acquisition parameters Parameter Setting Used Exposure time (s) 2.0 Number of exposures Laser source wavelength (nm) 785 Laser power (%) 100 Aperture shape pin hole Aperture size (um) 100 Spectral range 104-3428 Grating position Single 52 WO 2005/023198 545133 PCT/US2004/029013 Temperature at acquisition (degrees C) | 24.0 IR acquisitions IR spectra were obtained using NexusTM 470 FT-IR, Thermo-Nicolet, 5225 Verona Road, Madison, WI 53711-4495 and were analyzed with Control and Analysis software: OMNIC, Version 6.0a, (C) Thermo-Nicolet, 1995-2004.

Data for the co-crystals are shown in Table IV and in the Figures.

Example 1 Racemic Modafinil Malonic acid Co-crystal To a solution containing racemic modafinil (150 mg, 0.549 mmol) in acetic acid (600 microliters) was added malonic acid (114.9 mg, 1.104 mmol). The mixture was then heated on a hotplate at 67 degrees C until all material dissolved. The solution was then dried under a flow of nitrogen to give a 1:1 modafinikmalonic acid co-crystal as a colorless solid. The solid material was characterized using PXRD. The material was then dried further under a flow of nitrogen overnight to give the same material with a slight excess of malonic acid. The colorless solid was characterized using PXRD (Bruker), DSC, TGA, IR and Raman spectroscopy. PXRD data for the modafinihmalonic acid (1:1) co-crystal are listed in Table IV, and the diffractogram is shown in Figure 1 (Data as collected/received). DSC showed an endothermic transition at about 106 degrees C, and the thermogram is shown in Figure 2. TGA thermogram is shown in Figure 3. Figures 4A and 4B show a Raman spectrum of the modafinil malonic acid co-crystal and three Raman spectra of modafinil, malonic acid, and the co-crystal, respectively. Figures 5A and 5B show an IR spectrum of the modafinihtnalonic acid co-crystal and three IR spectra of modafinil, malonic acid, and the co-crystal, respectively. The modafinikmalonic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 1 including, but not limited to, 5.00,9.17, 10.08, 16.81, 18.26, 19.43,21.36, 21.94, 22.77, 24.49, 25.63,26.37, and 28.45 degrees 2-theta. 53 545133 The modafinilrmalonic acid co-crystal was also prepared by grinding the API and co-crystal former together. Racemic modafinil (2.50 g, 0.009 mol) and malonic acid (1.01 g, 0.0097 mmol) were mixed in a large mortar and pestle over a period of seven days (malonic acid added in increments over 7 days with about a 1:1.05 ratio made on the first day and increments added over the next seven days which resulted in a 1:2 modafinil imalonic acid ratio). The mixture was ground for 45 minutes initially and 20 minutes each time more malonic acid was added. On the seventh day the mixture of co-crystal and starting components was heated in a sealed 20 mL vial at 80 degrees C for about 35 minutes to facilitate completion of the co-crystal formation. PXRD analysis (Bruker) of the resultant material was completed, and is shown in Figure 6A (data as received). The modafmihmalonic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 6A including, but not limited to, 5.08, 9.28, 16.81, 18.27, 19.45, 21.39,21.99,22.83,23.50, 24.58, 25.12, and 28.49 degrees 2-theta. DSC thermogram for the co-crystal shows, in Figure 6B, an endothermic transition at about 116 degrees C. Single crystal data of the modafinikmalonic acid co-crystal were acquired and are reported below. Figure 7 shows a packing diagram of the modafinil-.malonic acid.

Crystal data: CisEfoNOeS, M = 377.40, monoclinic C2/c; a = 18.728(8) angstroms, b = 5.480(2) angstroms, c = 33.894(13) angstroms, alpha = 90 degrees, beta = 91.864(9) degrees, gamma = 90 degrees, T = 100(2) K, Z = 8, Dc = 1.442 Mg/m3, V = 3477(2) cubic angstroms, k - 0.71073 angstroms, 6475 reflections measured, 3307 unique (Rilrt = 0.1567). Final residuals were Ri = 0.1598, WR2 = 0.3301 for I>2sigma(I), and Ri = 0.2544, wR2 = 0.3740 for all 3307 data.

Other methods were also used to prepare the modafinil:malonic acid co-crystal. A third preparation was performed by placing modafinil (30 mg, 0.0001 mol) and excess malonic acid in a stainless steel vial. 20 microliters of acetone was added to the vial. The vial was then placed in a grinder (wig-l-bug, Bratt Technologies, 115V/60Hz) and the solid mixture was milled for 5 minutes. The resultant powder was then collected and characterized using PXRD and DSC. In yet another preparation of the modafinihmalonic acid co-crystal, the third preparation above was completed without the addition of solvent. All of the above methods with malonic acid were shown to yield the same co-crystal via PXRD and DSC analysis. 54 545133 Example 2 Racemic Modafinil:Glvcolic acid Co-crvstal Racemic modafinil (1 mg, 0.0037mmol) and glycolic acid (0.30 mg, 0.0037 mmol) were dissolved in acetone (400 microliters). The solution was allowed to evaporate to dryness and the resulting solid was characterized using PXRD (Rigaku). PXRD data for the modafinikglycolic acid co-crystal are listed in Table IV. See Figures 8A and 8B. Figure 8A shows the PXRD diffractogram after subtraction of background noise. Figure 8B shows the raw PXRD data as collected.

An alternative method for the preparation of modafinikglycolic acid co-crystals was also completed. To a solution of modafinil (1 mg, 0.0037 mmol) dissolved in a mixture of acetone and methanol (3:1,100 microliters) was added glycolic acid (0.28 mg, 0.0037 mmol) dissolved in methanol (50 microliters). The solvent was then evaporated to dryness under a flow of nitrogen to give a mixture of the two starting components. Acetone (200 microliters) was then added to the mixture and it was heated to 70 degrees C and maintained at 70 degrees C for 2 hours. The sample was then cooled to 5 degrees C and maintained at that temperature for 1 day. After 1 day, the cap was removed from the vial and the solvent was evaporated to dryness to give a modafinikglycolic acid co-ciystal as a colorless solid. The modafinikglycolic acid co-crystal was characterized by PXRD. The modafinikglycolic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 8A including, but not limited to, 9.51,14.91, 15.97, 19.01,20.03,21.59, 22.75,25.03, and 25.71 degrees 2-theta. The modafinikglycolic acid co-crystal can, likewise, be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 8B including, but not limited to, 9.53, 14.93, 15.99, 19.05,20.05, 21.61, 22.77, and 25.05 degrees 2-theta.

Example 3 Racemic Modafinil:Maleic acid Co-crystal To a solution containing modafinil (150 mg, 0.549mmol) in acetic acid (600 microliters) was added maleic acid (30.7 mg, 0.264mmol). The mixture was then heated on a hotplate at 67 degrees C until all material dissolved. The solution was then dried under a flow of nitrogen to give a clear amorphous material. The 55 545133 amorphous material was stored in a sealed vial at room temperature. After 2 days, a solid material began to form and and was collected and characterized to be a modafmikmaleic acid co-crystal using PXRD (Rigaku), as shown in Figures 9A and 9B. Figure 9A shows the PXRD diffractogram after subtraction of background noise. Figure 9B shows the raw PXRD data. PXRD data for the modafinil:maleic acid co-crystal are listed in Table IV. The modafinilrmaleic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 9A including, but not limited to, 4.69, 6.15, 9.61, 10.23, 15.65, 16.53,17.19,18.01,19.97, 21.83, and 22.45 degrees 2-theta. The modafinilrmaleic acid co-crystal can, likewise, be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 9B including, but not limited to, 4.69, 6.17, 9.63, 10.25, 15.67, 16.53,17.21, 18.05, 19.99, 21.85, and 22.47 degrees 2-theta.

Example 4 Racemic ModafinikL-tartaric acid Co-crvstal To a solution of racemic modafinil (10.12 mg, 0.037 mmol) in methanol (2 mL) was added L-tartaric acid (5.83 mg, 0.039 mmol). The solution was then left to evaporate at room temperature to give a clear, viscous material. The material was dried further under flowing nitrogen for 2 days, and then placed in a vial and capped. After 6 days, a small amount of colorless solid formed. One day after the first solids are seen approximately 60 % of the remaining clear amorphous volume converted to the solid form. A sample of this material was analyzed by PXRD (Bruker), as shown in Figure 10. The modafinil:L-tartaric acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 10 including, but not limited to, 6.10, 7.36, 9.38, 14.33, 16.93, 17.98, 18.81,20.15, 20.71, 22.49, and 25.04 degrees 2-theta.

Example 5 Racemic Modafinil :Citric acid Co-crystal Racemic modafinil (25.3 mg, 93 mmol) and citric acid monohydrate (26.8 mg, 128 mmol) were ground together for 3 minutes. 1 mg of the resulting mixture was then dissolved in acetone (100 microliters) and heated to 70 degrees C and maintained at that temperature for 2 hours. The solution was then cooled to 5 degrees C and was 56 wo 2oo5/o23i(>8 545133 left at that temperature for 2 days. After 2 days the cap was removed from the vial and one drop of water was added. The solvent was then evaporated to give a modafinil:citric acid monohydrate co-crystal as a colorless solid. The modafiniheitric acid monohydrate co-crystal was characterized by PXRD (Rigaku), as shown in Figure 11A (background subtracted). The modafinil:citric acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 11A including, but not limited to, 5.29, 7.29,9.31,12.41,13.29, 17.29,17.97, 18.79,21.37, and 23.01 degrees 2-theta.

Other methods were also used to prepare the modafinihcitric acid monohydrate co-crystal. A second preparation was performed by placing modafinil (30 mg, 0.0001 mol) and excess citric acid monohydrate in a stainless steel vial. 20 microliters of acetone was added to the vial. The vial was then placed in a grinder (wig-l-bug, Bratt Technologies, 115V/60Hz) and the solid mixture was milled for 5 minutes. The resultant powder was then collected and characterized using PXRD and DSC. The DSC thermogram is shown in Figure 1 IB. In yet another preparation of the modafinil .-citric acid monohydrate co-crystal, the second preparation above was completed without the addition of solvent. All of the above methods with citric acid monohydrate were shown to yield the same co-crystal via PXRD and DSC analysis.

Example 6 Racemic Modafinil-.Succinic acid Co-crvstal Racemic modafinil (25mg, 90 mmol) and succinic acid (10.6 mg, 90 mmol) were placed in a glass vial and dissolved in methanol (20 microliters). The resulting solution was heated at 70 degrees C for 2 hours and then cooled to 5 degrees C and maintained at that temperature for 2 days. After 2 days, the cap was removed from the vial and the solvent was evaporated at 65 degrees C to give a 2:1 modafinil:succinic acid co-crystal as a colorless solid. The co-crystal is a 2:1 co-crystal comprising two moles of modafinil for every mole of succinic acid. The modafinil:succinic acid co-crystal was characterized by PXRD (Rigaku) and DSC, as shown in Figures 12A, 12B, and 13. Figure 12A shows the PXRD diffractogram after subtraction of background noise. Figure 12B shows the raw PXRD data. Figure 13 shows the DSC thermogram.

An alternative method for the preparation of modafiniI:succinic acid co-crystals was also completed. To racemic modafinil (49.7 mg, 0.182 mmol) and 57 WO 2005/0231')8 545133 succinic acid (21.6 mg, 0.182 mmol) in a round bottom flask was added methanol (1.5 mL). The mixture was then dissolved on a hotplate at 65 degress C. Seed crystals of tnodafinilrsuccinic acid co-crystal from the above preparation were then added to the flask. The methanol was then evaporated using a rotary evaporator and a 65 degrees C hot water bath to give the modafinil:succinic acid co-crystal as a colorless solid. PXRD (Rigaku) of the collected solid confirms the synthesis of the modafiniksuccinic acid co-crystal. The modafiniksuccinic acid co-ciystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 12A including, but not limited to, 5.45, 9.93, 15.85, 17.97, 18.73, 19.95, 21.33, 21.93, 23.01, and 25.11 degrees 2-theta. The modafmil:succinic acid co-crystal can, likewise, be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 12B including, but not limited to, 5.45, 9.93, 15.87, 17.99,18.75, 19.95,21.95, 23.03, and 25.07 degrees 2-theta. Single crystal data of the modafmilrsuccinic acid co-crystal were acquired and are reported below. Figure 14 shows a packing diagram of the modafinil: succinic acid co-crystal.

Crystal data: C17H18NO4S, triclinic P-l; a = 5.672(4) angstroms, b = 8.719(6) angstroms, c = 16.191(11) angstroms, alpha = 93.807(14) degrees, beta = 96.471(17) degrees, gamma = 92.513(13) degrees, T = 100(2) K, Z = 2, Dc = 1.392 Mg/m3, V = 792.8(9) cubic angstroms, X = 0.71073 angstroms, 2448 reflections measured, 1961 unique (Rjnt = 0.0740). Final residuals were Ri = 0.1008, wR2 = 0.2283 for I>2sigma(I), and Ri = 0.1593, WR2 = 0.2614 for all 1961 data.

A third method was also used to prepare the modafiniksuccinic acid co-crystal. This method was performed by placing modafinil (30 mg, 0.0001 mol) and excess succinic acid in a stainless steel vial. 20 microliters of acetone was added to the vial. The vial was then placed in a grinder (wig-l-bug. Bratt Technologies, 115V/60Hz) and the solid mixture was milled for 5 minutes. The resultant powder was then collected and characterized using PXRD and DSC. All of the above methods with succinic acid were shown to yield the same co-crystal via PXRD and DSC analysis.

Example 7 Racemic Modafinil :DL-tartaric acid Co-crvstal 58 wo 2oo5/o23ii>8 545133 A suspsension of racemic modafinil (162 mg; 0.591 mmol) and DL-tartaric acid (462 mg; 3.08 mmol) in acetone (10 mL) was heated to reflux for 1 minute. The undissolved DL-tartaric acid was filtered off while the suspension was still hot through a 0.2 micrometer PTFE filter. The remaining solution was allowed to cool to room temperature then to 0 degrees C for 1 hour. After 1 hour, large colorless crystals were observed. The mother liquor was decanted and the solid was allowed to air dry and was characterized by PXRD (Rigaku), as shown in Figure 15. The modafmikDL-tartaric acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 15 including, but not limited to, 4.75, 9.53, 10.07, 15.83, 17.61, 19.37,20.25,21.53,22.55, and 23.75 degrees 2-theta (as collected).

Example 8 Racemic Modafinil:Fumaric acid Co-crvstal (Form D Racemic modafinil (30 mg, 0.0001 mol) and fumaric acid (2.3 mg, 0.0002 mol) were placed in a stainless steel vial. 20 microliters of acetone was added to the vial. The vial was then placed in a grinder (wig-l-bug, Bratt Technologies, 115V/60Hz) and the solid mixture was milled for 5 minutes. The resultant powder was then collected and characterized as modafinikfumaric acid co-crystal (Form I) using PXRD (Rigaku), as shown in Figure 16. The co-crystal is a 2:1 co-crystal comprising two moles of modafinil for every mole of fumaric acid. The modafinikfumaric acid co-crystal (Form I) can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 16 including, but not limited to, 5.45, 9.95, 10.91, 15.93, 18.03, 18.81, 19.93, 20.25, 21.37, 21.95, 23.09, and 25.01 degrees 2-theta (as collected). Single crystal data of the modafinikfumaric acid co-crystal (Form I) were acquired and are reported below. Figure 17 shows a packing diagram of the modafinikfumaric acid co-crystal (Form I).

Crystal data: C17H17NO4S, M = 331.38, triclinic P-l; a = 5.7000(15) angstroms, b = 8.735(2) angstroms, c = 16.204(4) angstroms, alpha = 93.972(6) degrees, beta = 97.024(6) degrees, gamma = 93.119(7) degrees, T = 100(2) K, Z = 2, Dc = 1.381 Mg/m3, V = 797.2(4) cubic angstroms, % = 0.71073 angstroms, 4047 reflections measured, 2615 unique (RitU = 0.0475). Final residuals were Ri = 0.0784, wR2 = 0.1584 for I>2sigma(l), and Ri = 0.1154, wR2 = 0.1821 for all 2615 data. 59 545133 Example 9 Racemic Modafinil :Fumaric acid Co-crvstal ("Form II) Racemic modafinil (30 mg, 0.0001 mol) and fumaric acid (1.2 mg, 0.0001 mol) were placed in a stainless steel vial. 20 microliters of acetone was added to the vial. The vial was then placed in a grinder (wig-l-bug, Bratt Technologies, 115V/60Hz) and the solid mixture was milled for 5 minutes. The resultant powder was then collected and characterized as modafinikfumaric acid co-crystal (Form II) using PXRD (Rigaku), as shown in Figure 18. The modafinikfumaric acid co-crystal (Form II) can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 18 including, but not limited to, 6.47, 8.57, 9.99, 13.89, 14.53, 16.45, 17.13, 17.51, 18.39, 20.05, 20.79, 25.93, and 27.95 degrees 2-theta (as collected).

Example 10 Racemic Modafinil :Gentisic acid Co-crvstal Racemic modafinil (30 mg, 0.0001 mol) and gentisic acid (1.5 mg, 0.0001 mol) were placed in a stainless steel vial. 20 microliters of acetone was added to the vial. The vial was then placed in a grinder (wig-l-bug, Bratt Technologies, 115V/60Hz) and the solid mixture was milled for 5 minutes. The resultant powder was then collected and characterized using PXRD (Bruker), as shown in Figure 19. The modafinikgentisic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 19 including, but not limited to, 6.96, 12.92, 14.76, 17.40,18.26,20.10,20.94,23.46, and 24.36 degrees 2-theta (as collected).

Example 11 Racemic ModafinikQxalic acid Co-crvstal A preparation of modafinikoxalic acid co-crystal was performed by placing racemic modafinil (30 mg, 0.0001 mol) and oxalic acid (1-2 mg, 0.0001-0.0002 mol) in a stainless steel vial. 20 microliters of acetone was added to the vial. The vial was then placed in a grinder (wig-l-bug, Bratt Technologies, 115V/60Hz) and the solid mixture was milled for 5 minutes. The resultant powder was then collected and characterized using PXRD (Bruker), as shown in Figure 20. In another preparation of 60 545133 the modafinilroxalic acid co-crystal, the preparation above was completed without the addition of solvent. Both methods were shown to yield the same co-crystal via PXRD analysis. The modafinikoxalic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 20 including, but not limited to, 5.98, 13.68, 14.80, 17.54, 19.68, 21.12, 21.86, and 28.90 degrees 2-theta (as collected).

Example 12 Racemic Modafinil: l-hvdroxv-2-naphthoic acid Co-crvstal Racemic modafinil (30 mg, 0.0001 mol) and 1-hydroxy-2-naphthoic acid (21 mg, 0.0001 mol) were placed in a stainless steel vial. 20 microliters of acetone was added to the vial. The vial was then placed in a grinder (wig-l-bug, Bratt Technologies, 115V/60Hz) and the solid mixture was milled for 5 minutes. The resultant powder was then collected and characterized using PXRD (Bruker), as shown in Figure 21. The modafinil: l-hydroxy-2-naphthoic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 21 including, but not limited to, 5.72,7.10, 11.48, 14.16, 15.66, 17.92, 19.18,20.26,21.28,21.94,24.38, and 26.86 degrees 2-theta (as collected). PXRD peaks at 10.05 and 26.36 degrees 2-theta may be from excess co-crystal former.

Example 13 R-f-VModafinil Malonic acid Co-crvstal R-(-)-modafmil:malonic acid co-crystal was prepared by grinding R-(-)-modafinil (29.7 mg, 0.109 mmol, 82.2 percent R-isomer) with malonic acid (11.9 mg, 0.114 mmol). The ground mixture was then heated to 80 degrees C for 10 minutes. The powder was analyzed by PXRD (Bruker) and DSC, as shown in Figures 22 and 23, respectively. The PXRD pattern confirms that the co-crystal was made and shows many similarities to the PXRD pattern for the racemic modafinihmalonic acid co-crystal. The R-(-)-modafiniI:malonic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 22 including, but not limited to, 5.04,9.26, 16.73, 18.23, 19.37, 21.90, 22.74, 24.44, and 61 WO 2005/0231<>8 545133 .67 degrees 2-theta (data as collected). The DSC showed a melting range of 111.5 -114.7 degrees C with a heat of fusion of 112.9 J/g.

Example 14 R-f-VModafini I rSuccinic acid Co-crystal R-(-)-modafinil:succinic acid co-crystal was prepared by grinding R-(-)-modafinil (30.9 mg, 0.113 mmol, 82.2 percent R-isomer) with succinic acid (14.8 mg, 0.125 mmol). The ground mixture was then heated to 145 degrees C for 5 minutes. The powder was analyzed by PXRD (Bruker) and DSC, as shown in Figures 24 and 25, respectively. The PXRD pattern confirms that the co-crystal was made and shows many similarities to the PXRD pattern for the racemic modafinil:succinic acid co-crystal made from solution. The R-(-)-modafmil:succinic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 24 including, but not limited to, 5.36, 9.83,15.80, 17.88, 18.70, 19.87, 21.21, 21.85, and 25.96 degrees 2-theta (data as collected). The DSC showed a melting range of 143.3 - 145.2 degrees C with a heat of fusion of 140.7 J/g.

Example 15 R-f-VModafmil:Citric acid Co-crvstal R-(-)-modafinil:citric acid co-crystal was prepared by grinding R-(-)-modafinil (30.0 mg, 0.110 mmol, 82.2 percent R-isomer) with citric acid monohydrate (27.1 mg, 0.129 mmol). The powder was analyzed by PXRD (Bruker) and DSC, as shown in Figures 26 and 27, respectively. The PXRD pattern confirms that the co-crystal was made and shows many similarities to the PXRD pattern for the racemic modafinikcitric acid co-ciystal. The R-(-)-modafinil:citric acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 26 including, but not limited to, 5.18, 7.23, 9.23, 12.32, 13.23, 17.25, 17.92, 18.76,20.25,21.30, and 23.71 degrees 2-theta (data as collected). The DSC showed a melting range of 83.5 - 89.0 degrees C with a heat of fusion of 39.8 J/g.

Example 16 R-C-")-Modafinil:DL-tartaric acid Co-crvstal 62 545133 The R-(-)-raodaflnil:DL-tartaric acid co-crystal was found from a high throughput crystallization experiment from dichloromethane. The vial contained a 1:2 mixture of R-(-)-modafmil (greater than 98 percent R-isomer) and DL-tartaric acid. The co-crystal was also found from a 1:1 mixture of R-(-)-modafmil (greater than 98 percent R-isomer) and DL-tartaric acid in nitromethane. The solid materials were collected and characterized using PXRD (Bruker) and DSC, as shown in Figures 28 and 29, respectively. The R-(-)-modafmil:DL-tartaric acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 28 including, but not limited to, 4.67, 15.41,17.97, 19.46, 20.50, 22.91, and 24.63 degrees 2-theta (as collected). Endothermic transitions were present at about 107, 152, and 187 degrees C.

Example 17 R-f-VModafinil:l-hvdroxv-2-naphthoic acid Co-crvstal To a solid mixture of R-(-)-modafinil (98.6 mg; 0.361 mmol, greater than 98 percent R-isomer) and l-hydroxy-2-naphthoic acid (71.2 mg; 0.378 mmol) was added o-xylene (4.5 mL). The mixture was heated to reflux for less than one minute at which point both solids dissolved. The solution was then slowly cooled to room temperature at which point a solid crystallized. The solid was collected via filtration and air-dried. The powder was characterized using PXRD (Bruker), as shown in Figure 30. The same material has been prepared from benzene, toluene, and acetone using the above procedure. The R-(-)-modafinil: l-hydroxy-2-naphthoic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 30 including, but not limited to, 5.27, 8.85, 10.60, 12.11, 14.47, 17.80, 18.80,21.20,23.03, and 25.61 degrees 2-theta (as collected).

The R-(-)-modafinil:l-hydroxy-2-naphthoic co-crystal was also obtained from a high throughput crystallization experiment from a vial containing a 1:1 mixture of R-(-)-modafmil (greater than 98 percent R-isomer) and l-hydroxy-2-naphthoic acid in nitromethane. The solid material was collected and characterized using DSC and PXRD (Bruker), as shown in Figures 31 and 32, respectively. The R-(-)-modafinil:l-hydroxy-2-naphthoic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 32 including, but 63 545133 not limited to 5.34, 8.99, 10.68, 12.15, 14.51, 21.28,23.14, and 24.50 degrees 2-theta (as collected). DSC shows endothermic transitions at about 118 and 179 degrees C.

Example 18 R-(-)-Modafinil:Orotic acid Co-crvstal The R-(-)-modafinil:orotic acid co-crystal was obtained from a high throughput crystallization experiment from a vial containing R-(-)-modafinil (1 mg, 0.0036 mmol, greater than 98 percent R-isomer) and orotic acid (1.14 mg, 0.0073 mmol) in acetone (100 microliters). The solid material obtained was characterized using PXRD (Bruker) and DSC, as shown in Figures 33 and 34, respectively. The R-(-)-modafinil:orotic acid co-ciystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 33 including, but not limited to, 9.77, 17.85, 20.52, 20.95,24.03, and 26.80 degrees 2-theta (as collected). PXRD peaks at 14.61 and 28.60 may correspond to excess co-crystal former. Endothermic transitions were present at about 116, 130, and 169 degrees C.

Table IV: Co-crystals of Modafinil Co-Crystal former Representative PXRD Peaks (degrees 2-theta) Malonic acid .00, 9.17, 10.08,16.81, 18.26,19.43, 21.36, 2L94,22:77, 24.49,25.63, 26.37,28.45 Glycolic acid 9.5'3,'14.93,15.99,19.05, 20.05, 21.61, 22.77,25.05 Maleic acid 4.69, 6.17, 9.63, 10.25,15.67,16.53, 17.21J 18.05, i9.99,21.85, 22.47 L-tartaric acid 6.10,7.36, 9.38, 14.33, i6.93, 17198,18.81,20.15, 20.71,22.49, 25.04 Citric acid .29, 7.29, 9.31,12.41,13.29,17.29,17.97,18.79, 21.37,23.01 Succinic acid .45, 9.93, 15.87, 17.99, 18.75,19.95; 21.95; 23.03, 25.07 DL-tartaric acid 4.75, 9.53, 10.07,15.83, 171(51,19,37, 20.25,21.53, 22^5, 23.75 Fumaric acid (Form I) .45, 9.95, 10.91, 15.93, 18.03, 18.8i; 19.93,20.25, 21.37,21:95,23.09, 25.01 Fumaric acid (Form II) 6.47, 8.57, 9.99, 13.89,14.53,16.45, 17.13,17.51,18.39,20.05, 20.79, 25.93, 27.95 Gentisic acid 6.96, 12.92,14.76,17.40', 18.26,20.10, 20.94, 23.46, 24.36 Oxalic acid .98, 13.68,14.80,17.54, 19.68,21.12, 21.86,28.90 1 -hy droxy-2-naphthoic acid .72, 7.10, 11.48,14.16, 15.66, 1792, 19.18,20.26, 21.28,21.94,24.38, 26.86 ♦Malonic acid .04, 9.26, 16.73, 18.23, 19.37, 21.90, 22.74,24.44,25.67 * Succinic acid .36, 9.83, 15.80,17.88, 18.70, 19.87, 21.21, 21.85, 25.96 * Citric acid .18, 7.23, 9.23, 12.32,13.23,17.25,17.92, 18.76, 20.25,21.30, 23.71 **DL-tartaric acid 4.67, 15.41, 17.97, 19.46, 20.50, 22.91, 24.63 ** l-hydi'oxy-2-naphthoic acid .27, 8.88,10.60,12.11, 14.47,17.80, 18.80,21.20,23.03, 25.61 ** Orotic acid 9.77,17.85,20.52,20.95,24.03,26.80 **Gcntisic acid 7.07, 7.51,9.07, 12.31,16.03,17.63,18.39,19.83, 21.27,23.57,26.93,28.85 * = API is R-(-)-modafinil with 82.2 percent (purity) R-(-)-modafiniI (17.8 percent S-(+)-modafinil) 64 545133 ** = API is R-(-)-modafinil with greater than 98 percent (purity) R-(-)-modafinil (less than 2 percent S- (+)-modafinil All other co-crystals comprise racemic modafmil Example 19 Acetic acid Solvate of Racemic Modafinil To racemic modafinil (12.9 mg, 0.047 mmol) was added acetic acid (40 microliters). The mixture was heated at 50 degrees C to completely dissolve the solid. The solution was allowed to cool to room temperature, and left overnight, which yielded no precipitation. The solution was then evaporated under flowing nitrogen until precipitation was observed. The resulting solid was further dried under flowing nitrogen. Characterization of the product has been achieved via PXRD (Rigaku), TGA, DSC, and Raman spectroscopy, as shown in Figures 35-38, respectively. An alternative method for the preparation of the acetic acid solvate of modafinil was also completed. A sample of modafinil acetic acid solvate was prepared by dissolving racemic modafinil (12.9 mg, 0.047 mmol) in acetic acid (40 microliters) and incubating at 65 degrees C for 30 minutes to dissolve, then cooling to 25 degrees C to incubate overnight. The sample was then evaporated to approximately 1/3 volume. After centrifugation of the sample, rapid nucleation and growth of crystals was observed. An additional 20 microliters of acetic acid was then added. The sample was heated at 50 degrees C until partial dissolution of the crystals was observed. The sample was then cooled to room temperature over a 1 hour period, then to 5 degrees C for 3 hours in an attempt to induce crystal growth. The sample was then dried under nitrogen gas. Rapid appearance of crystals was observed. The modafinil acetic acid solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 35 including, but not limited to, 6.17, 9.63, 15.69, 17.97, 19.99, and 21.83 degrees 2-theta (data as collected).

Example 20 Tetrahydrofiiran Solvate of Racemic Modafinil The tetrahydrofiiran (THF) solvate of modafinil was prepared by placing racemic modafinil (10.4 mg, 0.038 mmol) in tetrahydrofiiran (1 mL). The powder did not completely dissolve in THF and converted overnight into long, fine, needle shaped crystals which were collected and analyzed by PXRD (Rigaku), as shown in Figure 39. The modafinil tetrahydrofiiran solvate can be characterized by any one, 65 545133 any two, any three, any four, any five, or any six or more of the peaks in Figure 39 including, but not limited to, 6.97, 9.79, 10.97,16.19, 19.03, 19.71, 20.59, 22.25, and 25.13 degrees 2-theta (data as collected).

Example 21 1.4-Dioxane Solvate of Racemic Modafinil To racemic modafinil (11.6 mg, 0.042 mmol) was added 1,4-dioxane (1 mL). The mixture was then left overnight and converted to long, fine, needle shaped crystals which were collected and analyzed by PXRD (Rigaku), as shown in Figure 40. The modafinil 1,4-dioxane solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 40 including, but not limited to, 6.93, 9.85, 10.97, 16.19, 18.97, 19.61,20.33,20.65, and 22.07 degrees 2-theta (data as collected). PXRD pattern also contains several spikes which were a result of instrument error and could not be removed.

Example 22 Methanol Solvate of Racemic Modafinil The methanol solvate of modafinil is obtained by evaporating 2 mL of a 30 mg/mL racemic modafinil solution in methanol under flowing nitrogen overnight. The methanol solvate was characterized by PXRD (Rigaku), TGA, and DSC, as shown in Figures 41,42, and 43, respectively. The modafinil methanol solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 41 including, but not limited to, 6.15, 9.89, 12.25, 15.69,17.97, 20.07, 21.85, and 22.73 degrees 2-theta (data as collected).

Example 23 Nitromethane Solvate of Racemic Modafinil To racemic modafinil (12.9 mg, 0.047 mmol) was added nitromethane (1 mL). The mixture which did not fully dissolve was left overnight and converted to large rectangular crystals. The solid was collected and analyzed by PXRD (Rigaku), as shown in Figure 44. The modafinil nitromethane solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 66 WO 2005/0231')8 545133 44 including, but not limited to, 6.17, 9.77,15.89,18.11, 20.07, 22.17, 22.91, 25.31, and 25.83 degrees 2-theta (data as collected).

Example 24 Acetone Solvate of Racemic Modafinil A solution containing racemic modafinil (300 mg, 0.001 mol) and glutaric acid (150 mg, 0.001 mol) in acetone (3 mL) was heated until it was boiling in order to dissolve all solid material. Once the solids dissolved, the solution was placed on an aluminum block at 5 degrees C. After 15 minutes of sitting at 5 degrees C, crystals began to form at the bottom of the vial. The solution was then decanted and the single crystals were collected and analyzed using PXRD (Rigaku), as shown in Figure 45. The crystals were determined to be an acetone solvate of modafinil. The acetone solvate of modafinil can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 45 including, but not limited to, 6.11, 9.53, 15.81, 18.11, 20.03, 21.63,22.45, 25.23, 25.65, 28.85, 30.23, and 32.93 degrees 2-theta (as collected). The acetone solvate may also be obtained following the procedure above with several other co-crystal formers including adipic acid, lactobionic acid, maleic acid, and glycolic acid.

Example 25 Racemic modafinil (1 mg, 0.0037mmol) and mandelic acid (0.55 mg, 0.0037 mmol) were dissolved in acetone (400 microliters). The solution was allowed to evaporate to dryness and the resulting solid was characterized using PXRD (Rigaku), as shown in Figure 46. The obtained solid is a mixture of the acetone solvate and another product of modafinil. The form can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 46 including, but not limited to, 6.11, 9.53, 15.77, 18.03,20.01, and 21.61 degrees 2-theta (background removed). Other peaks including 6.75, 10.31,14.77, and 23.27 may correspond to a modafinil polymorph.

Example 26 Racemic modafinil (1 mg, 0.0037mmol) and fumaric acid (0.42 mg, 0.0037 mmol) were dissolved in 1,2-dichloroethane (400 microliters). The solution was allowed to evaporate to dryness and the resulting solid was characterized using PXRD 67 545133 (Rigaku), as shown in Figure 47. The obtained solid may be a solvate of modafinil. The form can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 47 including, but not limited to, 5.87, 8.95, 12.49, 13.99, 18.19, 19.99,21.57, and 25.01 degrees 2-theta (background removed).

Example 27 Novel form of Racemic Modafinil Racemic modafinil was dispensed from a stock solution containing 50 mg of modafinil in 20 mL of a 15:5 acetone/methanol mixture. The solution was then evaporated to dryness under a flow of nitrogen. Benzoic acid was dispensed from an acetone solution and the mixture was again evaporated to dryness. 200 microliters of isopropyl alcohol or methanol was then added and the vials were capped. After standing at room temperature for one day, the caps were removed and the solvent was allowed to evaporate. PXRD (Rigaku) was carried out on the sample, as shown in Figure 48. The novel form of racemic modafinil, which may be a polymorph or a co-crystal, is denoted as form VII. Form VII can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 48 including, but not limited to, 5.47, 9.99, 15.73, 17.85,18.77, 20.05, 21.23, 22.05, 23.15, and 25.13 degrees 2-theta (data as collected).

Example 28 Racemic ModafinikMalonic acid Co-Crvstal Pharmacokinetic Study in Dogs The racemic modafinihmalonic acid co-crystal (from Example 1) was administered to dogs in a pharmacokinetic study. Particles of modafinikmalonic acid co-crystal with a median particle size of about 16 micrometers were administered in the study. As a reference, micronized modafinil with a median particle size of about 2 micrometers was also administered in the study. The AUC of the modafinil: malonic acid co-crystal was determined to be 40 to 60 percent higher than that of the pure modafinil. Such a higher bioavailability illustrates the modulation of an important pharmacokinetic parameter due to an embodiment of the present invention. A compilation of important pharmacokinetic parameters measured during the animal study are included in Table V. 68 WO 2005/0231<>8 PCT/US2004/029013 Table V- Pharmacokinetic parameters of modafinikmalonic acid co-crystal and pure modafinil in dogs Parameter Pure Modafinil Modafinikmalonic acid co-crystal Median particle size 2 micrometers 16 micrometers C„,flS (ng/niL) 11.0 ±5.9 .3 + 3.4 Troax (hours) 1.3 + 0.6 1.7 + 0.6 AUC (relative) 1.0 1.4-1.6 Half-life (hours) 2.1 ±0.7 .1+2.4 Example 29 Racemic Modafinil:Malonic acid Co-crvstal Solid-State Stability The stability of the racemic modafinil malonic acid co-crystal was measured at various temperatures and relative humidities over a four week period. No degradation was found to occur at 20 or 40 degrees C. At 60 degrees C, about 0.14 percent degradation per day was determined based on a simple exponential model. At 80 degrees C, about 8 percent degradation per day was determined.

The stability of the modafmil:malonic acid co-crystal was also measured at various temperatures and relative humidities over a 26 week period. Figures 49 and 50 show the % area impurities as measured via IIPLC versus time (weeks) for samples stored at various conditions including: 25 degrees C, 60 % RH; 40 degrees C, 75 percent RH; 40 degrees C, ambient RH; 60 degrees C, ambient RH; 80 degrees C, ambient RH; and -20 degrees C. These data show that the compound is stable when stored at or below 40 degrees C for at least 26 weeks. Figure 51 compares PXRD patterns of initial and 26 week old samples of the modafinil:malonic acid co-crystal for several temperatures and RH levels.

Example 30 Formulation of Racemic Modafinil :Malonic Acid Co-crvstal The formulation of a racemic modafinil :malonic acid co-crystal was completed using lactose. Two mixtures, one of modafinil and lactose, and the second of modafinikmalonic acid co-crystal and lactose, were ground together in a mortar an pestle. The mixtures targeted a 1:1 weight ratio of modafinil to lactose. In the modafinil and lactose mixture, 901.2 mg of modafinil and 901.6 mg of lactose were ground together. In the modafinikmalonic acid co-crystal and lactose mixture, 1221.6 mg of co-crystal and 871.4 mg of lactose were ground together. The resulting 69 545133 powders were analyzed by PXRD and DSC. The PXRD patterns and DSC thermograms of the mixtures showed virtually no change upon comparison with both individual components. The DSC of the co-crystal mixture showed only the co-crystal melting peak at 113.6 degrees C with a heat of fusion of 75.9 J/g. This heat of fusion is 59.5 % of that found for the co-crystal alone (127.5 J/g). This result is consistent with a 58.4 % weight ratio of co-crystal in the mixture. The DSC of the modafinil and lactose mixture had a melting point of 165.7 degrees C. This is slightly lower then the measured melting point of modafinil (168.7 degrees C). The heat of fusion of the mixture (59.3 J/g) is 46.9 % that of the modafinil alone (126.6 J/g), which is consistent with the estimated value of 50 %.

The in vitro dissolution of both the modafinikmalonic acid co-crystal and pure modafinil were tested in capsules. Both gelatin and hydroxypropylmethyl cellulose (HPMC) capsules were used in the dissolution study. The capsules were formulated with and without lactose. All formulations were ground in a mortar and pestle prior to transfer into a capsule. The dissolution of the capsules was tested in 0.01 M HC1 (See Figure 52).

In 0.01NHCI, using sieved and ground materials in gelatin capsules: Modafinil and the modafinikmalonic acid co-crystal were passed through a 38 micrometer sieve. Gelatin capsules (Size 0, B&B Pharmaceuticals, Lot # 15-01202) were filled with 200.0 mg sieved modafinil, 280.4 mg sieved modafinil-.malonic acid co-crystal, 200.2 mg ground modafinil, or 280.3 mg ground modafinil-.malonic acid co-crystal. Dissolution studies were performed in a Vankel VK 7000 Benchsaver Dissolution Testing Apparatus with the VK750D heater/circulator set at 37 degrees C. At 0 minutes, the capsules were dropped into vessels containing 900 mL 0.01 M HC1 and stirred by paddles.

Absorbance readings were taken using a Cary 50 Spectrophotometer (wavelength set at 260nm) at the following time points: 0, 5, 10, 15,20, 25, 30, 40, 50, and 60 minutes. The absorbance values were compared to those of standards and the modafinil concentrations of the solutions were calculated.

In 0.01NHCI, using ground materials in gelatin or HPMC capsules, with and without lactose: 70 545133 Modafinil and the modafinikmalonic acid co-crystal were mixed with equivalent amounts of lactose (Spectrum, Lot QV0460) for approximately 5 minutes. Gelatin capsules (Size 0, B&B Pharmaceuticals, Lot # 15-01202) were filled with 400.2 mg modafinil and lactose (approximately 200 mg modafinil), or 561.0 mg modafinikmalonic acid co-crystal and lactose (approximately 200 mg modafinil). HPMC capsules (Size 0, Shionogi, Lot # A312A6) were filled with 399.9 mg modafinil and lactose, 560.9 mg modafinikmalonic acid co-crystal and lactose, 199.9 mg modafinil, or 280.5 mg modafinikmalonic acid co-crystal. The dissolution study was carried out as described above.

Example 31 In Vitro Dissolution Figure 53 shows in vitro dissolution data of micronized racemic modafinikmalonic acid co-crystal and of micronized modafinil in simulated gastric fluid (SGF) and in simulated intestinal fluid (SIF). Both samples were blended with lactose and filled into HPMC capsules. The co-crystal releases modafinil into solution more quickly in both SGF and SIF than does the free form of modafinil. Figure 54 compares the dissolution of an HPMC capsule filled with the modafinikmalonic acid co-ciystal blended with lactose and that of a PROVIGIL tablet. Figure 55 shows a dynamic vapor sorption (DVS) isotherm plot of the modafinikmalonic acid co-crystal. This plot shows no appreciable water adsorption up to at least 40 percent RH at 26 degrees C.

Example 32 In Vivo Studies A pharmacokinetic study was completed with dogs using both racemic modafinikmalonic acid formulated with lactose and PROVIGIL tablets (200 mg). Seven capsules were filled with the modafinikmalonic acid co-crystal and lactose to 476.24 +/- 2 mg, each containing 200 mg modafinil. Figure 56 shows the co-crystal formulation has an increased Cmax and an increased bioavailability. Severel important pharmacokinetic parameters are described in Table VI. In Table VI, "Cmax" is the maximum blood plasma concentration, "AUC (inf)" is the extrapolated area under the curve, "ti/2" is the amount of time for the blood plasma level to decrease to half of the Cmax level beginning at administration, "Tmax" is the time to maximum blood plasma 71 545133 concentration from administration, "CL" is the clearance rate of modafinil, and "F %" is the percent bioavailability.

Table VI- PK parameters of modafinikmalonic acid co-crystal and PROVIGIL from In Vivo study PROVIGIL (200 mg) Cmax AUC (inf) tl/2 Tmax CL F % Mean 7838.33 41193.33 1.76 2.00 524.17 66.48 SD 2734.35 8104.32 0.88 0.63 146.98 13.08 %CV 34.9 19.7 49.7 31.6 28.0 19.7 Modafinil:malonic acid (200 mg modafinil) Cmax AUC (inf) tl/2 Tmax CL F % Mean 11246.67 50545.00 1.63 2.00 368.33 81.57 SD 1662.13 10635.46 0.64 0.89 165.60 17.16 % cv 14.8 ' 21.0 39.5 44.7 45.0 21.0 Example 33 R-f-VmodafinikGentisic acid Co-crvstal R-(-)-modafinil (50 mg, 0.183 mmol, greater than 98 percent R-isomer) and gentisic acid (28.2 mg, 0.183 mmol) were placed in a stainless steel vial. 10 microliters of acetone was added to the vial. The vial was then placed in a grinder (wig-l-bug, Bratt Technologies, 115V/60Hz) and the solid mixture was milled for 5 minutes. The resultant powder was then collected and characterized using PXRD (Rigaku), as shown in Figure 57. The R-(-)-modafinil:gentisic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 57 including, but not limited to, 7.07, 9.07, 12.31, 13.03, 14.09, 18.93,19.83, and 21.27 degrees 2-theta (as collected). Other PXRD peaks at 7.51, 16.03,17.63, 18.39, 23.57, 26,93, and 28.85 degrees 2-theta correspond to excess co-crystal former.

Example 34 Channel Solvates of Racemic Modafinil Channel solvates of modafinil have been unexpectedly discovered. The channel solvate was made from a solution of racemic modafinil (97.9 mg, 0.358 mmol) and l-hydroxy-2-napthoic acid (68.8 mg, 0.366 mmol) in acetone (3.15 mL), dissolved over a 60 degrees C hotplate. The solution was then evaporated under flowing nitrogen while hot to 1.6 mL total volume. Once cooled, the solution was seeded with ground racemic modafinil: 1 -hydroxy-2-naphtoic acid co-crystal. Single 72 545133 crystals were obtained and characterized using single x-ray analysis. Single-crystal x-ray parameters: P2(l)/n, a = 12.737(3) angstroms, b = 5.5945(11) angstroms, c = 22.392(5) angstroms, alpha= 90 degrees, beta= 104.140(4) degrees, gamma = 90 degrees, V = 1547.3(5) cubic angstroms, Z = 2. Figures 58 and 59 show packing diagrams of the acetone channel solvate of modafinil. The packing diagrams show acetone with a variable position within the channel structure. An ethyl acetate channel solvate has also been prepared according to the method above using ethyl acetate in place of acetone.

Example 35 o-Xylene Hemisolvate of Racemic Modafinil An o-xylene hemisolvate was formed by preparing a 1:2 solution of racemic modafinil (49.6 mg, 0.181 mmol) and l-hydroxy-2-napthoic acid (68.3 mg, 0.363 mmol) in o-xylene (4.5 mL). The mixture was heated on a hotplate with swirling until all solids were dissolved. The solution was then left to crystallize in a sealed vial. The resulting powder was collected in a centrifuge filter and analyzed by PXRD (Bruker), as shown in Figure 60. Raman spectroscopy (Figure 61), TGA(Figure 62), and DSC (Figure 63) were also used to analyze and characterize the hemisolvate. The o-xylene solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 60 including, but not limited to, 5.31, 6.53,6.96, 10.68,14.20,17.64,19.93, 25.69, and 26.79 degrees 2-theta. The o-xylene solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 61 (middle spectrum) including, but not limited to, 1641, 1407,1379, 1211, 1024, and 721 cm-1.

Example 36 Benzene Hemisolvate of Racemic Modafinil A benzene hemisolvate was formed by preparing a 1:2 solution of racemic modafinil (50.6 mg, 0.181 mmol) and l-hydroxy-2-napthoic acid (70.1 mg, 0.373 mmol) in benzene (1.8 mL). The mixture was heated on a hotplate with swirling until all solids were dissolved. The solution was then left to crystallize in a sealed vial. The resulting powder was collected in a centrifuge filter and analyzed by PXRD 73 WO 2005/0231')8 545133 (Bruker), as shown in Figure 64. Raman spectroscopy (Figure 65), TGA (Figure 66), and DSC (Figure 67) were also used to analyze and characterize the hemisolvate. The benzene solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 64 including, but not limited to, 5.82, 6.09, 8.11,10.28, 12.06,13.28, 14.73, 17.03, 19.11, 19.93,21.23, 25.38, and 26.43 degrees 2-theta. The benzene solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 65 (middle spectrum) including, but not limited to, 1637, 1600, 1409, 1380, 1214, 1025, 998, and 721 cm"1.

Example 37 Toluene Hemisolvate of Racem ic Modafinil A toluene hemisolvate was formed by making a 1:2 solution of racemic modafinil (37.3 mg, 0.136 mmol) and l-hydroxy-2-napthoic acid (51.3 mg, 0.273 mmol) in toluene (1 mL). The mixture was heated on a hotplate with swirling until all solids were dissolved. The solution was then left to crystallize in a sealed vial. The resulting powder was collected in a centrifuge filter and analyzed by PXRD (Bruker), as shown in Figure 68. Raman spectroscopy (Figure 69), TGA (Figure 70), and DSC (Figure 71) were also used to analyze and characterize the hemisolvate. The toluene solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 68 including, but not limited to, 5.30, 5.96,10.65, 12.90,14.51,17.60, and 18.15 degrees 2-theta. The toluene solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 69 (middle spectrum) including, but not limited to, 1640, 1581, 1408, 1380, 1209, 1024,1001, and 722 cm"1.

Example 38 Pharmacokinetics of Isomers of Modafinil A dog pharmacokinetic study (N = 6) of a single intravenous dose of R-(-)-modafmil was completed. The purity of the R-(-)-modafmil in the administered formulation was ca 80 percent. This formulation was compared to a formulation of racemic modafinil, also administered by the intravenous route to the same dogs in a crossover design. Results are reported in Table VII. In Table VII, "Cmax" is the 74 545133 maximum blood plasma concentration, "AUC (inf)" is the extrapolated area under the curve, "ti/2" is the amount of time for the blood plasma level to decrease to half of the Cmax level beginning at administration, "Vd" is the volume of distribution, and "CL" is the clearance rate of modafinil.

Table VII- PK parameters of racemic modafinil and R-(-)-modafinil from In Vivo study Racemic Modafinil (5 mg/kg IV) Cmax AUC (inf) tl/2 vd CL (ng/mL) (ng/mL x hr) (hr) (mL/kg) (mL/hr x kg) Mean 8682,83 15117.50 1.05 588.83 341.00 SD 1413.71 2870.24 0.16 96.41 65.63 %CV 16.3 19.0 .4 16.4 19.2 R-(-)-modafinil (5 mg/kg IV) Mean 7806.67 15905.17 1.53 646.67 340.33 SD 827.97 4958.47 1.11 68.10 102.39 %CV .6 31.2 72.5 .5 1 30.1 These results suggest that there is no significant difference between the pharmacokinetics of R-(-)-modafmil and racemic modafinil following intravenous administration.

These results are in contrast to the pharmacokinetics of the isomers when administered by the oral route (See US Patent No. 4,927,855, which is herein incorporated by reference in its entirety). In said study, four dogs were administered 30 mg/kg oral dose of either R-(-)-modafinil (40-982), S-(+)-modafinil (40-983), or racemic modafinil (40-476). The AUC values were calculated from plasma concentration of both forms (40-476) and the sulfone metabolite measured from 2 to 9 hours post-dose administration. Table VIII shows the pharmacokinetic data.

Table VIII- PK parameters of racemic modafinil, R-(-)-modafinil, and S-(+)-modafinil from In Vivo study Compound administered (30 mg/kg) Mean AUC (racemate) (mg/L x hr) Mean AUC (sulfone) (mg/L x hr) 40-476 (racemate) 46.76 +/- 6.95 .12+/-6.93 40-982 (R-(-)-modafinil) 97.22 +/- 12.58 8.69+/-1.22 40-983 (S-(+)-modafinil) 50.94 +/- 8.77 83.12+/-21.66 75 545133 These results suggest striking differences in the metabolism of both isomers of modafinil, leading to differences in the formation of the inactive sulfone metabolite therefore resulting in higher exposure to the API when administered as R-(-)-modafinil. The different profile observed between the intravenous and the oral route could be explained by the fact that the formation of the sulfone metabolite is primarily catalyzed by cytochrome CYP3A4 which is both present at the intestinal and hepatic level, and that the affinity of CYP3A4 to S-(+)-modafinil is higher (stereoselective metabolism) than that to R-(-)-modafiniI. This can result in faster metabolite formation with S-(+)-modafinil which can reduce the exposure to the API.

Example 39 R-f-Vmodafinil Ethanol Solvate A solution containing R-(-)-modafinil (100 mg, 0.366 mmol, 85.4 percent R-isomer) and racemic modafinil (40 mg, 0.146 mmol) in ethanol (3 mL) was prepared. The mixture was heated to reflux in order to dissolve the entire solid and was then cooled to room temperature (25 degrees C). After remaining at room temperature for 15 minutes, the solution was placed at 5 degrees C overnight. A solid precipitate was observed after 1 day and was collected, dried, and characterized using PXRD and TGA (Figures 72 and 73). The solid was determined to be an ethanol solvate of R-(-)-modafinil.

R-(-)-modafinil ethanol solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 72 including, but not limited to, 6.13, 9.59,15.69, 17.97, 20.05,21.55,22.35,25.77, and 29.07 degrees 2-theta (Rigaku PXRD, data as collected).

TGA of the R-(-)-modafmil ethanol solvate characterized in Figure 73 showed about a 5.4 percent weight loss between about 25 and about 140 degrees C.

Example 40 R-C-Vmodafinil Benzyl alcohol Solvate R-(-)-modafinil (100 mg, 0.366 mmol) was milled with benzyl alcohol (40 microliters) for 5 minutes. The milled powder was then analyzed by PXRD, DSC, and TGA (Figures 74, 75, and 76). The powder was determined to be a benzyl alcohol solvate of R-(-)-modafinil. 76 545133 R-(-)-modaftnil benzyl alcohol solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 74 including, but not limited to, 5.77, 7.76, 10.48, 15.78, 17.80,18.57,21.53,22.97, and 27.73 degrees 2-theta (Bruker PXRD, data as collected).

DSC of the R-(-)-modafinil benzyl alcohol solvate characterized in Figure 75 showed an endothermic transition at about 83 degrees C.

TGA of the R-(-)-modafmil benzyl alcohol solvate characterized in Figure 76 showed about a 28.5 percent weight loss between about 25 and about 125 degrees C.

Example 41 R-(-Vmodafinil Isopropanol Solvate R-(-)-modafinil was slurried overnight in isopropanol. The liquid was filtered out in a centrifuge filter, then dried under flowing nitrogen gas at 5 degrees C. The resulting solid was analyzed via PXRD.

R-(-)-modafinil isopropanol solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 77 including, but not limited to, 5.76, 7.77, 10.49, 15.79, 18.58, 21.53,25.76, and 27.74 degrees 2-theta (Bruker PXRD, data as collected).

Example 42 R-C-Vmodafxnil Acetonitrile Solvate 100 mg of R-(-)-modafinil was slurrie in acetonitrile for 2 days. The solid was filtered from the suspension and analyzed by PXRD.

R-(-)-modafmil acetonitrile solvate can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 78 including, but not limited to, 5.29, 6.17, 8.16, 10.19, 11.19, and 21.86 degrees 2-theta (Bruker PXRD, data as collected).

Example 43 R-f-VModafinil:Glutaric acid Co-crvstal R-(-)-modafmil (20 to 30 mg, greater than 98 percent R-isomer) and glutaric acid (15-20 mg) were ground together in the presence of one drop of benzyl alcohol. 77 545133 The resultant solid was characterized by PXRD (See Figure 79) and may comprise a co-crystal. The R-(-)-modafinil:glutaric acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 79 including, but not limited to, 4.30, 8.67, 9.78, 17.99, 18.92, 19.74,20.50, 21.36, 22.25, 23.87,27.16,29.24, and 32.46 degrees 2-theta (Bruker PXRD, data as collected).

Wet grinding was also used with acetone and with water, both of which resulted in the formation of the co-crystal.

Example 44 R-(-VModafinil:Citric acid Co-crvstal R-(-)-modafinil (20 to 30 mg, greater than 98 percent R-isomer) and citric acid monohydrate (15-20 mg) were ground together in the presence of one drop of benzyl alcohol.

The resultant solid was characterized by PXRD (See Figure 80) and may comprise a co-crystal. The R-(-)-modafinil:citric acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 80 including, but not limited to, 5.23,7.06, 9.10, 12.43, 13.18, 14.37, 17.34, 17.95,20.85,21.39, 22.03, 22.96,23.54, and 24.93 degrees 2-theta (Bruker PXRD, data as collected).

Wet grinding was also used with acetone which resulted in the formation of the co-crystal.

Example 45 R-C-VModafinil:L-tartaric acid Co-crvstal R-(-)-modafinil (20 to 30 mg, greater than 98 percent R-isomer) and L-tartaric acid (15-20 mg) were ground together in the presence of one drop of benzyl alcohol.

The resultant solid was characterized by PXRD (See Figure 81) and may comprise a co-crystal. The R-(-)-modafinil:L-tartaric acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 81 including, but not limited to, 4.56, 10.33, 14.45, 17.29, 19.91, 21.13,23.10,24.10, and 26.76 degrees 2-theta (Bruker PXRD, data as collected). 78 545133 Wet grinding was also used with acetone and with water, both of which resulted in the formation of the co-crystal.

Example 46 R-(-)-Modafinil:Oxalic acid Co-crvstal R-(-)-modafinil (20 to 30 mg, greater than 98 percent R-isomer) and oxalic acid (15-20 mg) were ground together in the presence of one drop of benzyl alcohol.

The resultant solid was characterized by PXRD (See Figures 82A and 82B) and may comprise one or more co-crystals. The R-(-)-modafinil:oxalic acid (Form I) co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 82A including, but not limited to, 5.99,14.73, 16.59, 17.38, 18.64,25.66, and 28.85 degrees 2-theta (Bruker PXRD, data as collected). The R-(-)-modafinil:oxalic acid (Form II) co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 82B including, but not limited to, 5.66, 14.76, 17.20, 17.63, 19.60,24.90, and 28.84 degrees 2-theta (Bruker PXRD, data as collected).

Wet grinding was also used with acetone and with water, both of which resulted in the formation of the co-crystal.

Example 47 R-(-VModafinil:Palmitic acid Co-crvstal R-(-)-modafinil (20 to 30 mg, greater than 98 percent R-isomer) and palmitic acid (15-20 mg) were ground together in the presence of one drop of benzyl alcohol.

The resultant solid was characterized by PXRD (See Figure 83) and may comprise a co-crystal. The R-(-)-modafinil:palmitic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 83 including, but not limited to, 3.80, 6.55, 7.66, 10.24, 11.49, 19.48, 21.09, 21.74, 22.20, 22.97, and 23.99 degrees 2-theta (Bruker PXRD, data as collected).

Example 48 79 545133 R-(-VModafinil:L-proline Co-crystal R-(-)-modafmil (20 to 30 mg, greater than 98 percent R-isomer) and L-proline (15-20 mg) were ground together in the presence of one drop of benzyl alcohol.

The resultant solid was characterized by PXRD (See Figure 84) and may comprise a co-crystal. The R-(-)-modafmil:L-proline co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 84 including, but not limited to, 6.52, 8.53, 10.25, 14.69,19.06, 19.71,20.75, 22.29, 22.75, 25.08, and 26.27 degrees 2-theta (Bruker PXRD, data as collected).

Wet grinding was also used with acetone and with methanol, both of which resulted in the formation of the co-crystal.

Example 49 R-M-Modafmil:Salicylic acid Co-crvstal R-(-)-modafinil (20 to 30 mg, greater than 98 percent R-isomer) and salicylic acid (15-20 mg) were ground together in the presence of one drop of benzyl alcohol.

The resultant solid was characterized by PXRD (See Figure 85) and may comprise a co-crystal. The R-(-)-modafinil:salicylic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 85 including, but not limited to, 8.92,10.85,12.18, 14.04, 17.07, 17.59, 18.81, 21.24,23.32,25.22, and 28.59 degrees 2-theta (Bruker PXRD, data as collected).

Example 50 R-f-VModafinil:Lauric acid Co-crvstal R-(-)-modafinil (20 to 30 mg, greater than 98 percent R-isomer) and lauric acid (15-20 mg) were ground together in the presence of one drop of benzyl alcohol.

The resultant solid was characterized by PXRD (See Figure 86) and may comprise a co-crystal. The R-(-)-modafinil:lauric acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 86 including, but not limited to, 3.12, 6.55, 10.24, 13.97, 16.40, 17.62, 19.02,20.05,21.38,22.24,23.81, and 25.96 degrees 2-theta (Bruker PXRD, data as collected). 80 545133 Wet grinding was also used with acetone and with methanol, both of which resulted in the formation of the co-crystal.

Example 51 R-(-VModafinil:L-malic acid Co-crvstal R-(-)-modafinil (20 to 30 mg, greater than 98 percent R-isomer) and L-malic acid (15-20 mg) were ground together in the presence of one drop of acetone.

The resultant solid was characterized by PXRD (See Figure 87) and may comprise a co-crystal. The R-(-)-modafinil:L-malic acid co-crystal can be characterized by any one, any two, any three, any four, any five, or any six or more of the peaks in Figure 87 including, but not limited to, 4.62, 9.32, 10.32, 15.83, 16.71, 17.38, 19.30,19.93,21.48,23.07,24.26, and 27.25 degrees 2-theta (Bruker PXRD, data as collected).

Example 52 Preparation of benzhdrvlthioacetic acid from henzlivdrol To a solution of benzhydrol (100 g, 0.542 mol) in trifluoroacetic acid (300 mL) at room temperature (about 22 degrees C) was added thioglycolic acid (50 g, 0.542 mol) drop wise over 20 minutes. Reaction progress was monitored by thin layer chromatography (TLC). The reaction was complete within one hour at which point water (1000 mL) was added slowly into the reaction mixture causing the product to precipitate. The resulting precipitate was filtered, washed with water and dried overnight under high vacuum to give benzhydrylthioacetic acid (139.3 g, 99.3%) as a pale yellow solid. (See Prisinzano, T. et al, Tetrahedron Asymm., 2004, 15, 1053-1058) Example 53 Preparation of benzhdrvlthioacetic acid from bromodiphenvlmethane COne Pot Procedure^ To a solution of thiourea (30.4 g. 0.399 mol) in water (200 mL) was added bromodiphenylmethane (98.8 g, 0.399 mol) at 42 degrees C. The mixture was heated 81 545133 gradually to reflux for 10 minutes. The reaction mixture was then cooled to 50 degrees C and 5 N NaOH (200 mL) was subsequently added. The reaction mixture was then heated to reflux (101-102 °C) for 30 minutes and subsequently cooled to 60 degrees C. To this reaction mixture was slowly added a solution of chloroacetic acid (53.4 g, 0.565 mol) and NaOH (22.2 g) in water (150 mL) over 45 minutes. The reaction mixture was stirred for another 30 minutes. The reaction was then cooled to room temperature and washed with f-butylmethylether (200 ml) to remove any non carboxylic acid impurities. The aqueous layer was acidified (pH 2.0) using concentrated HCl (50 mL). The resulting precipitate was filtered, washed with water (2 x 200 mL) and heptane (200 mL) and allowed to air dry to give benzhydrylthioacetic acid (116.8 g, 100%) as a colorless solid. (See US Patent No. 4,066,686) Example 54 Preparation of benzhdrvlthioacetic acid from benzhvdrol using trifluoroacetic acid in dichloromethane To a solution of benzhydrol (90 g, 0.488 mol) and trifluoroacetic acid (90 mL) in dichloromethane (300 mL) was added thioglycolic acid (40 g, 0.488 mol) in dichloromethane (60 mL) drop wise over 20 minutes. The reaction was completed in one hour. The solvent was removed in vacuo to give a crude solid, which was dried overnight under high vacuum. The solid was treated with 2 N NaOH (1.0 L) and washed with /"-butylmethylether (200 ml) to remove non carboxylic acid impurities. The aqueous solution was then acidified with concentrated HCl and the resulting precipitate was collected, washed with water and dried to give benzhydrylthioacetic acid (128.5 g) as a colorless solid.

Example 55 Preparation of benzhvdrvlsulfinvlacetic acid from benzhdrvlthioacetic acid To a suspension of benzhydrylthioacetic acid (63.7 g, 0.246 mol) in methanol (250 mL) was added a solution of concentrated H2SO4 (1.6 mL) in isopropyl alcohol (65 mL) at room temperature (about 22 degrees C). To this suspension was added 82 545133 % H2O2 in water (65 mL) drop wise over 25 minutes. The reaction was monitored by TLC and was completed within 2 hours. The solution was diluted with a solution ofNaHSOs (125 mg) in water (700 mL). The resulting precipitate was filtered, washed with water, then methanol: water (1:1), and dried to give benzhydrylsulfinylacetic acid (47.6 g). 'H-TMMR indicated the desired product was obtained along with -10 percent starting material and some impurities. The compound was triturated with ethanol (100 mL), filtered and dried to give pure benzhydrylsulfinylacetic acid (33.4 g, 49.4%) as a colorless solid. (See Prisinzano, T. et al, Tetrahedron Asymm., 2004,15, 1053-1058) Example 56 Oxidation of benzhdrvlthioacetic acid A 50 L three-necked round bottom flask equipped with a mechanical stirrer, a 2 L dropping funnel, a nitrogen inlet and an internal temperature probe was charged with benzhydrylthioacetic acid (3.5 kg, 13.54 mol), methanol (14 L) and H2SO4 (72 g) solution in isopropyl alcohol (6.5 L). To this mixture was added 30% H2O2 solution in water (3.75 L) drop wise over 80 minutes maintaining the temperature below 30 degrees C. Reaction mixture was further stirred for 7 hours, which resulted in formation of a crystalline solid. The reaction was monitored using TLC and HPLC. The resulting solid was filtered and washed with water (4.0 L) to give benzhydrylsulfinylacetic acid (2.5 kg) as a colorless solid. The peroxide was quenched with a NaHS03 solution.

Example 57 Resolution of benzhydrylsulfinylacetic acid using S-f-Va-methvlbenzvlamine To a solution of (±)-benzhydrylsulfinylacetic acid (62.4 g, 0.227 mol) in water (300 mL) at 80 degrees C was added 5'-(-)-a-methylbenzyl amine (30 mL, 0.236 mol) and stirred at reflux (101-102 degrees C) for 10 minutes. The solution was gradually cooled to 40 degrees C and the resulting precipitate was filtered, washed with water and dried to give a colorless solid (71.4 g). The salt was re-crystallized in water (500 ml) to give another colorless solid (53.5 g). The salt was then suspended in water 83 WO 2005/0231')8 545133 (200 mL), acidified with concentrated HCl (50 mL), and stirred for 10 minutes. The resulting suspension was filtered and washed with water to give R-(-)-benzhydrylsulfinylacetic acid (21.5 g) as a colorless solid. Chiral purity as determined by HPLC was >99.9% ee. (See US Patent No. 4,927,855) Example 58 Amidation of R-M-benzhvdrvlsulfinylacetic acid to give R-C-Vmodafinil using N.N-carbonvl diimidazole A 50 L, three-necked round bottom flask equipped with a mechanical stirrer, a nitrogen inlet and an internal temperature probe was charged with R-(-)-benzhydrylsulfinylacetic acid (1.32 kg, 4.81 mol) and tetrahydrofiiran (7.0 L). To this slurry was added AT,2V-carbonyl diimidazole (1.215 kg, 7.49 mol) in tetrahydrofiiran (7 L), which gave a clear solution. The solution was then stirred for 30 minutes and NH3 gas (191 g, 2.5 eq.) was then bubbled through the reaction mixture for 3.5 hours.

After that time, the volatiles were removed in vacuo to give a crude solid, which was triturated with a 20% methanol solution in /-butylmethylether (7.0 L) overnight. The solid material was then collected and purified further by refluxing of the solid in a 1:1 mixture of ethanol and f-butylmethylether (3 L). The reaction was then cooled to room temperature and the solid material was filtered and dried to give R-(-)-modaftnil (501 g, 99.6% chemical purity and 100% ee) as a colorless solid.

Example 59 Preparation of Racemic Modafinil via activation using iV.Af-Carbonyl Diimidazole (CDD To a suspension of (±)-benzhydrylsulfinylacetic acid (10.0 g, 0.036 mol) in tetrahydrofiiran (100 mL) was added A^V-carbonyl diimidazole (7.1 g, 0.043 mol) resulting in a clear solution. The solution was stirred for 10 minutes and a precipitate formed upon evolution of CO2. NH3 gas was then bubbled through the reaction mixture for 10 minutes raising the reaction temperature from 16 to 33 degrees C. The reaction mixture was then diluted with water and extracted with ethyl acetate (3 x 50 84 545133 mL). The organic layers were combined, washed with water, brine and dried over Na2SQ4- The organic layer was then concentrated in vacuo to give crude modafinil (11.5 g). Recrystallization from 60 % aqueous methanol gave pure modafmil (6.0 g) as a colorless solid.

Example 60 Synthesis of Modafinil from henzhvdrol To a solution of benzhydrol (30 g, 0.162 mol) and trifluoroacetic acid (15 mL) in dichloromethane (120 ml) was added a solution of methyl thioglycolate (0.178 mol) in dichloromethane (30 ml) drop wise over 20 minutes. The reaction was stirred at room temperature for 1 hour and a saturated NaHCOj solution was added slowly. The organic layer was separated and concentrated in vacuo to give crude benzhydrylthioacetate (38.2 g, 89%).

To a solution of NH4CI (0.29 mol, 2.0 eq) and NH4OH (300 ml) in methanol (200 mL) was added a solution of benzhydrylthioacetate (38.2 g, 0.145 mol) in methanol (50 ml) maintaining the temperature below 20 °C. The reaction was stirred for 1 hour and diluted with water (100 ml) resulting in the formation of a precipitate. The precipitate was collected, washed with water and dried to give benzhydrylthioacetamide (31 g) as colorless solid.

Racemic modafmil was obtained from oxidation of benzhydrylthiacetamide using H2O2 following the same method used in the oxidation of benzhydrylthioacetic acid in the preparation of R-(-)-modafinil. 85 TABLE I Table 1 Co-Crystal Former MW (g/mol) MP (°C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values 1 -Hydroxy-2-naphthoic acid 188.18 191-192 2 Carboxylic acid, alcohol 1 2 OH 2.7,13.5 4-aminobenzoic acid 137.14 187-188 2 Amine, carboxylic acid 1 3 ) 4.7, 4.8 4-atninopyridine 94.11 158-159 3 Amine, pyridine 1 2 4-Chlorobenzene-sulfonic acid 192.63 67 1 so3h 3 . 1 CI SOjK 0-1 4-ethoxyphenyl urea 180.2 173-174 3 Amide, NH 2 3 0 -7-9 7-oxo-DHEA 303 190-192 1 Alcohol, Ketone 3 1 o CHjII cn, y T | J 1 H I H 86 TABLE 1 2 m N> OF ar> 3m 3o -< Or- a "x CO *$i m I 33 1 s Co-Crystal Former MW (g/mol) MP (°C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values Acesulfame 163.15 123-124 3 S02, Amide 4 1 a o ~5-7 Acetohydroxamic acid 75.07 89-92 3 Amide, NH, OH 2 2 1 h 8.7 Adenine 135.13 220 (sub.) 1 Amine, NH 3 3 nhj kx> 3.8 Adipic Acid 146.14 152 1 Carboxylic acid 2 2 HOOC(CH2)<COOH 4.44, 5.44 Alanine 89.09 289-291 1 Amine, carboxillic acid 1 3 h h2n oh 2.35', 9.87 Allopurinaol 136.11 >350 3 OH,NH 4 2 r"t)- oh .2 87 TABLE I 0 z — 1 ) r«o cn rn op 5m 2o 1 3> sf ■ —< Or • 5s* ■n-o i s NS m 33 3 Co-Crystal Former MW (g/mol) MP (°C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values Arginine 174.2 244 (dec.) 1 Amine, COOH 2 7 NH O NH] 2.18, 9.09, 13.2 Ascorbic acid 176.12 190-192 1 C=0, OH 6 4 HO OH 4.17,11.57 Asparagine 132.12 234-235 1 Amine, amide, COOH 3 o o nh2 2.02, 8.5 Aspartic acid 133.1 270-271 1 Amine, COOH 2 4 "ty1- o nh2 1.88, 3.65, 9.60 Benzenesulfonic Acid 158.18 43-44 1 S03H 2 1 "C/ 1 0.70, 1.58 Benzoic acid* 122.12 122-123 2 COOH 1 1 CK 4.19 Ul £>. Ul 88 TABLE f D ti n i m or oi ID m Jo -< or- "n-n S 23 40 N% m n 3 Co-Crystal Former MW (g/mol) MP (°C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values Caffeine 194.19 238 3 C=0 3 0 ■&$ I cttj Camphoric acid 200.23 186-189 2 Carboxylic acid 2 2 H3C COOH ac, COOH 4.72, 5.83 Capric acid 172.27 31.4 1 Carboxylic acid 1 1 CH3(CH2)8COOH 4.9 Chrysin 254.24 285 1 Phenol, ether, ketone 2 2 oh o Cinnamic acid 144.2 133 3 Carboxylic acid 1 1 o 4.4 Citric Acid 192.12 153 1 OH, COOH 4 4 ^,^-cooh ho —cooh ^^cooh 3.13,4.76, 6.40 89 TABLE I rsj cr> m or 3o i »g. -< or """0 , & 23 N: m 33 Co-Crystal Former MW (g/mol) MP (°C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values Clemizole 325.84 167 1 Pyrrolidine 3 0 Cyclamic acid 179.24 169-170 3 NH, S03H 2 2 -2 Cysteine 121.15 — 1 Amine, COOH, SH 2 4 0 nh2 1.71, 8.33, 10.78 Dimethylglycine 103.1 178-192 1 Amine, Carboxylic acid 2 1 o \ II N—CH-C—OH / 1 H 2.5 D-Ribose 150.13 87 1 Alcohol, ether 1 4 HCK Y> 1 r OH OH Fumaric acid 116.07 287 1 COOH 2 2 x o V"" -o o—;. f o £ 3.03, 4.38 90 TABLE I z —i m or cr> 3o -< 01- £o ""x b Z23 N% rn 21 3 Co-Crystal Former MW (g/mol) MP (°C) Class Functionality # acceptors Udonors Molecular Strucutre pKa Values Galactaric acid 210.14 255 (dec) 1 Carboxylic acid, alcohol 2 6 OH OH I I IIOOC C—HC—HC C COOH I I OH OH 3.08, 3.63 Genistein 270.24 297-298 1 Alcohol, Phenol, ether, ketone 2 3 OH O II — OH Gentisic acid 154.12 199-200 form 1,205 form II 2 Carboxylic acid, alcohol, phenol 1 3 COOH jtr 2.93 Glucamine, N-Methyl 195.22 128-129 1 Alcohol, Amine 6 OH OH A A 1 y H oh oh 8.03(B) Gluconic acid 196.15 131 1 OH, COOH 6 6 h h oh h 3.76 oh oh h oh Glucosamine 179.17 88 1 OH 6 V oh | mhg 6.91 91 TABLE I Co-Crystal Former MW (g/mol) MP (®C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values Glucuronic acid 194.14 165 1 Carboxylic acid, alcohol, aldehyde 2 s oh oh o oh oh 3.18 Glutamic acid 147.13 160 1 Amine, COOH 2 4 o 0 nh2 2.19, 4.25, 9.67 Glutamine 146.15 185-186 1 Amine, Amide, COOH 2 0 0 nh2 2.17, 9.13 Glutaric acid 132.11 98-98 1 COOH 2 2 0 0 2.7, 4.5 Glycine 75.07 182 1 Amine, COOH 2 3 0 oh 2.34, 9.6 Glycolic acid 76.05 80 1 OH, COOH 2 2 °H ho 0 3.82 is ! 92 TABLE I Co-Crystal Former MW (g/mol) MP(°C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values Hippuric acid 179.17 187-188 1 Amide, NH, COOH 2 2 T O 3,55 Histidine 155.16 287 (dec.) 1 Amine, COOH, Imidazole 2 4 o *n nhj 1.78, 5.97, a.97 Hydroquinone* 110.11 170-171 2 OH, Phenol 2 2 jCT -10 Imidazole 68.08 90-91 1 NH 1 1 6.92 Ipriflavone 280.32 115-117 1 Ketone, ether 3 0 xjocV^ Isoleucine 131.17 168-170 (sub.) 1 Amine, COOH 1 3 ch3 0 0, nhj 2.32, 9.76 93 TABLE I Co-Crystal Former MW (g/mol) MP (°C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values Lactobionic acid 358.3 128-130 2 Alcohol, carboxylic acid, ether 1 9 |h o ^11° 3.2 Laurie acid 200.32 44-48 1 Carboxylic acid 1 1 CH3(CH2)10COOH -4.5 Leucine 131.17 145-148 (sub.) 1 Carboxylic acid, amine 1 3 v o VV- h2n 2.36, 9.6 Lysine 146.19 225 (dec.) 1 Amine, COOH 1 o htn. AL oh mhj 2.2, 8.9, 10.28 Maleic 116.07 138-139 1 COOH 2 2 _u o o / \ o o X 1.92, 6,23 Malic acid 134.09 131-132 1 OH, COOH 3 3 o oh 0 3.46, 5.1 i 01 ft 94 TABLE I Co-Crystal Former MW (g/mol) MP(°C) Class Fttnctionality # acceptors # donors Molecular Strucutre pKa Values Malonic 104.06 135 1 COOH 2 2 2.83, 5.70 Mandelic acid 152.15 119 1 OH, COOH 2 2 3.37 Methionine 149.21 280-282 ■(dec.) 1 Amine, COOH, S-Me 2 3 0 NH2 2-3,9 Nicotinamide 122.12 128-131 1 Pyridine, amide 2 2 0 Of 3.3 Nicotinic acid 123.11 236-237 2 Carboxylic acid, pyridine 2 1 8- o X 2.07(B), 4.85 Orotic acid 156.1 345-346 2 Carboxilic acid, lactam 3 3 L^nh cooh .85,8.95 95 TABLE I op OS 3m 2o 2: £?;=! mc -< o£ j Co ^■o p CO Co-Crystal Former MW (g/mol) MP (°C) Class Functionality # acceptors # donors Molecular Strucutre pKa 1 Values Oxalic acid 90.04 189 (dec) 2 Carboxilic acid 2 2 -v 0 1.27,4.27 Palmidc acid 256.43 63-64 1 Carboxylic acid 1 1 CH3(CH2)14COOH 4.9 Pamoic 388.38 280 (dec) 2 Carboxylic acid, phenol 2 4 COOH COOH 2.51,3.1 Phenylalanine 165.19 283 (dec.) 1 Amine, COOH 1 3 0 -2,-9 Piperazine 86.14 106 1 NH 0 2 /~-\ 9.82(B) Procaine 236.31 61 1 Amine, C=0 2 2 ^CKj 8.9(B) Proline 115.13 220-222 (dec.) 1 COOH, NH 1 2 r 0 "b 1.99,10.6 • M 33 96 TABLE I Co-Crystal Former MW (g/mol) MP(°C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values p-Toluenesulfonic acid 172.2 106-107 2 Sulfonic acid 2 1 j 2 ~ -1.34 Pyridoxamine 168 193-194 2 OH, Amine, Pyridine 3 4 -jx ~9 Pyridoxine 170 160 2 Alcohol, Pyridine 3 3 jx oh ~9 Pyroglutamic acid 129.12 162 2 Carboxylic acid, Lactam 2 2 3.32 Quercetin 302.24 314 dec. 1 Phenol, ether, ketone 2 oh o Resveratrol 228.24 253-255 1 Phenol 0 3 97 TABLE I Co-Crystal Former MW (g/mol) MPfC) Class Functionality * acceptors # donors Molecular Strucutre pXa Values Saccharin 183.19 228-230 1 Amide, C=0, S=0, N-H 3 1 g< a 2 Salicylic acid, 4-amino 153.14 150-151 3 COOH, OH, Analine 1 4 "-o-c OH 3.25,10, 3.5(B) Salicylic acid 138.12 159 3 COOH, OH 2 2 OH 2.98, 13.82 Sebacic acid 202.25 134.5 1 Carboxylic acid 2 2 HOOC(CH2)aCOOH 4.59, 5.59 Serine 105.09 228 (dec.) 1 Carboxylic acid, amine, OH 2 3 o NHj 2.21,9.15 Stearic acid 284.47 70-71 1 Carboxylic acid 1 1 CH3(CH2)16COOH 4.9 Succinic acid 118.09 185-187 1 Carboxylic acid 2 2 0 o 4.21,5.64 « « 98 TABLE I -< m Of ^ m 3o I Or "D N% rn 33 3| Co-Crystal Former MW (g/mol) MP (°C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values Tartaric acid 150.09 205-206 1 Carboxylic acid 4 4 oh o v-a o oh 3.02,4.36 Threonine 119.12 255-257 (dec.) 1 Amine, COOH, OH 2 4 oh o nh2 2.15, 9.12 TRIS 121.13 171-172 2 Amine, OH 3 nh2 ho^A^oh 'oh .91,8.3 Tiyptophan 204.23 289 (dec.) 1 Amine, COOH, Indole 1 4 oq^ 9 2.30, 9.39 Tyrosine 181.19 342-344 1 Amine, COOH, OH 2 3 xrv- 2.2, 9.11, 10.07 Urea 60.06 Dec. 1 CO,NH2 .1 4 h2n -8 99 TABLE I « Co-Crystal Former MW (g/mol) MP (°C) Class Functionality # acceptors # donors Molecular Strucutre pKa Values Valine 117.15 315 1 Amine, COOH 1 3 ch, 0 nhj -4.5, -9 Vitamin K5 209.68 280-282 (dec.) 3 Amine, OH 1 3 -9 Xylitol 152.15 93-95 (I) 2 OH oh oh oh -9 100 ) TABLE II Co-crystal Former Co-crystal Former Functional Group Interacting Group 1,5-Napthalene-disulfonic Add Sulfonic Acid pyridine ketone aldehyde ether ester amide Carboxylic . Acid 1 -Hy droxy-2-naphthoic add Carboxylic Acid alcohol ketone thiol amide amine analine phenol 1-Hydroxy-2-naphthoic add alcohol alcohol ketone thiol amide amine analine phenol 4-Aminobenzoic Acid Amine alcohol ketone thiol amide amine analine phenol 4-Aminobenzoic Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol 4-aminopyridine Amine alcohol ketone thiol amide amine analine phenol 4-aminopyridine Pyridine 'alcohol pyridinium * 'amide nitro 'amine 'Carboxylic Acid 4-Chlorobenzene-Sulfonic Acid Sulfonic Acid pyridine ketone aldehyde ether ester amide Carboxylic Acid 4-ethoxypher>yl Urea Amide alcohol ketone thiol amide amine analine phenol 4-ethoxyphenyl Urea Amine alcohol ketone thiol amide amine analine phenol 7-oxo-DHEA alcohol alcohol ketone thiol amide amine analine phenol 7-oxo-DHEA Ketone alcohol thiol amide amine analine phenol Acesulfame Sulfone pyridine ketone aldehyde ether ester amide carboxilic acid Acesulfame Amide alcohol ketone thiol amide amine analine phenol Acetohydroxamic Acid Amide alcohol ketone thiol amide amine analine phenol Acetohydroxamic Acid Amine alcohol ketone thiol amide amine analine phenol Acetohydroxamic Acid Alcohol alcohol ketone thiol amide amine analine phenol Adenine Amine alcohol ketone thiol amide amine analine phenol Adenine N 'alcohol pyridinium * *amide nitro "amine 'carboxilic acid Adipic acid Carboxyiic Acid alcohol ketone thiol amide amine analine phenol Alanine Amine alcohol ketone thiol amide amine analine phenol Alanine Carboxyiic Acid alcohol ketone thiol amide amine analine phenol Altopurinaoi Alcohol alcohol ketone thiol amide amine analine phenol Allopurinaol Amine alcohol ketone thiol amide amine analine phenol Arginine Amine alcohol ketone thiol amide amine analine phenol Arginine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Ascorbic Add Ketone alcohol thiol amide amine analine phenol Ascorbic Acid Alcohol alcohol ketone thiol amide amine analine phenol Ascorbic Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Page 101 TABLE II Co-crystal Former 1,5-Napthalene-dtsulfonic Acid amine metals thioether sulfate alcohol 1-Hydroxy-2-naphtholc acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde ester 1 -Hy droxy-2-naphthoic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde ester 4-Aminobenzoic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde 4-Aminobenzoic Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Add metals aldehyde 4-aminopyridine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde 4-aminopyridine 'sulfonamide "ketone ether triazole ammonium oxime "chlorine 4-Chlorobenzene-Sulfonic Acid amine metals thioether sulfate alcohol 4-ethoxyphenyl Urea phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde 4-ethoxyphenyl Urea phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde 7-oxo-DHEA phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde ester 7-oxo-DHEA phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Acesulfame amine metals thioether sulfate alcohol Acesulfame phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Acetohydroxamic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Acetohydroxamic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Acetohydroxamic Acid phosphate sulfate suifone nitrate pyridine Carboxylic Add metals aldehyde Adenine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Adenine *sulfonamide "ketone ether triazole ammonium oxime "chlorine Adipic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Alanine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Alanine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Allopurinaol phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Allopurinaol phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Arginine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Arginine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Ascorbic Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Ascorbic Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Ascorbic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Page102 TABLE II Co-crystal Former 1,5-Napthalene-disulfonic Acid 1-Hydroxy-2-naphthoic acid ether cyano furan bromine chlorine s-heterocyclic pyridine 1-Hydroxy-2-naphthoic acid ether cyano furan bromine chlorine s-heterocyclic pyridine 4-Aminobenzoic Acid ester ether cyano furan bromine chlorine s-heterocyclic 4-Aminobenzoic Acid ester ether cyano furan bromine chlorine s-heterocyclic 4-aminopyridine ester ether cyano furan bromine chlorine s-heterocyclic 4-aminopyridine thiol n-heterocydic ring thionedisulfide pyrrolidindione iodine hydrazone thiocyanate "bromine 4-Chlorobenzene-Sulfonic Acid 4-ethoxyphenyl Urea ester ether cyano furan bromine chlorine s-heterocyolic 4-ethoxyphenyl Urea ester ether cyano furan bromine chlorine s-heterocyclic 7-oxo-DHEA ether cyano furan bromine chlorine s-heterocyclic pyridine 7-oxo-DHEA ester ether cyano furan bromine chlorine s-heferocyclic Acesulfame Acesulfame ester ether cyano furan bromine chlorine s-heterocyclic Acetohydroxamic Acid ester ether cyano furan bromine chlorine s-heterocyclic Acetohydroxamic Acid ester ether cyano furan bromine chlorine s-heterocyclic Acetohydroxamic Acid ester ether cyano furan bromine chlorine s-heterocyclic Adenine ester ether cyano furan bromine chlorine s-heterocyclic Adenine thiol n-heterocyclic ring thionedisulfide pyrrolidindione iodine hydrazone thiocyanate "bromine Adipic acid ester ether cyano furan bromine chlorine s-heterocyclic Alanine ester ether cyano furan bromine chlorine s-heterocyclic Alanine ester ether cyano furan bromine chlorine s-heterocyclic Allopurinaol ester ether cyano furan bromine chlorine s-heterocyclic Allopurinaol ester ether cyano furan bromine chlorine s-heterocyclic Arginine ester ether cyano furan bromine chlorine s-heterocyclic Arginine ester ether cyano furan bromine chlorine s-heterocyclic Ascorbic Add ester ether cyano furan bromine chlorine s-heterocyclic Ascorbic Add ester ether cyano furan bromine chlorino s-heterocyclic Ascorbic Acid ester ether cyano furan bromine chlorine s-heterocyclic Page 103 TABLE II Z —1 m OF 05 5m 3o —< Or ro ■*-Q § CO N° m 3D *1 Co-crystal Former 1,5-Napthalene-disulfonic Acid 1 -Hydroxy-2-naphthoic acid cyano n-heterocyclic ketone phosphate ester fluorine carbamate 1 -Hydroxy-2-naphthoic acid cyano n-heterocyclic ketone phosphate ester fluorine carbamate 4-Aminobenzoic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine 4-Aminobenzoic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine 4-aminopyridine pyridine cyano n-heterocyclic ketone phosphate ester fluorine 4-aminopyridine hydroxamic acid cyano carboxamide 'sulfonic acid •phosphoric acid N-oxide 4-Chlorobenzene-Sulfonic Acid 4-ethoxyphenyl Urea pyridine cyano n-heterocyclic ketone phosphate ester fluorine 4-ethoxyphenyl Urea pyridine cyano n-heterocyclic ketone phosphate ester fluorine 7-oxo-DHEA cyano n-heterocyclic ketone phosphate ester fluorine carbamate 7-oxo-DHEA pyridine cyano n-heterocyclic ketone phosphate ester fluorine Acesulfame Acesulfame pyridine cyano n-heterocyclic ketone phosphate ester fluorine Acetohydroxamic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Acetohydroxamic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Acetohydroxamic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Adenine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Adenine hydroxamic acid cyano carboxamide *sulfonicacid 'phosphoric acid N-oxide Adipic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Alanine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Alanine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Allopurinaol pyridine cyano n-heterocyclic ketone phosphate ester fluorine Allopurinaol pyridine cyano n-heterocyclic ketone phosphate ester fluorine Arginine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Arginine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Ascorbic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Ascorbic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Ascorbic Acid 'pyridine cyano n-heterocyclic ketone phosphate ester fluorine I Page 104 TABLE IE Co-crystal Former 1,5-Napthalene-disulfonic Acid 1 -Hydroxy-2-naphthoic acid imidazole BF4 1 -Hydroxy-2-naphthoic acid imidazole BF4 4-Amtnobenzoic Acid carbamate imidazole BF4 N-S02 thiourea iodine 4-Aminobenzoic Acid carbamate imidazole BF4 N-S02 thiourea iodine 4-aminopyridine carbamate imidazole BF4 N-S02 thiourea iodine 4-aminopyridine ester ether fluorine acetate thione dithiadiazocycfopentadienyl 4-Chlorobenzene-Sulfonic Acid 4-ethoxyphenyl Urea carbamate imidazole BF4 N-S02 thiourea iodine epoxide 4-ethoxyphenyl Urea carbamate imidazole BF4 N-S02 thiourea iodine 7-oxo-DHEA imidazole BF4 7-oxo-DHEA carbamate imidazole BF4 N-S02 thiourea iodine Acesulfame Acesulfame carbamate imidazole BF4 N-S02 thiourea iodine epoxide Acetohydroxamic Acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Acetohydroxamic Acid carbamate imidazole BF4 N-S02 thiourea iodine Acetohydroxamic Acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Adenine carbamate imidazole BF4 N-S02 thiourea iodine Adenine ester ether fluorine acetate thione dithiadiazocyciopentadienyl Adipic acid carbamate imidazole BF4 N-S02 thiourea iodine Alanine carbamate imidazole BF4 N-S02 thiourea iodine Alanine carbamate imidazole BF4 N-S02 thiourea iodine Allopurinaol carbamate imidazole BF4 N-S02 thiourea iodine epoxide Allopurinaol carbamate imidazole BF4 N-S02 thiourea iodine Arginine carbamate imidazole BF4 N-S02 thiourea iodine Arginine carbamate imidazole BF4 N-S02 thiourea iodine Ascorbic Acid carbamate imidazole BF4 N-S02 thiourea iodine Ascorbic Acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Ascorbic Acid carbamate imidazole BF4 N-S02 thiourea iodine Page 105 z rn ^ or ? |8 3C o-j ^ Or Co-crystal Former 1,5-Napthalene-disulfonic Acid 1-Hydroxy-2-naphthoic acid 1 -Hydroxy-2-naphthoic acid 4-Aminobenzoic Acid 4-Aminobenzoic Acid 4-aminopyridine 4-aminopyridine 4-Chlorobenzene-Sulfdnic Acid 4-ethoxyphenyl Urea peroxide 4-ethoxyphenyl Urea 7-oxo-DHEA 7-oxo-DHEA Acesulfame Acesulfame peroxide Acetohydroxamic Acid peroxide Acetohydroxamic Add Acetohydroxamic Add Adenine Adenine Adipic add Alanine Alanine Allopurinaol Allopurinaol Arginine Arginine Ascorbic Add Ascorbic Acid Ascorbic Acid TABLE II Page 106 TABLE II Co-crystal Former Co-crystal Former Functional Group Interacting Group Asparagine Amine alcohol ketone thiol amide amine analine phenol Asparagine Amide alcohol ketone thiol amide amine analine phenol Asparagine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Aspartic Acid Amine alcohol ketone thiol amide amine analine phenol AsparticAcid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Benzenesulfonic Acid Sulfonic Acid pyridine ketone aldehyde ether ester amide Carboxylic Acid Benzoic Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Caffeine Ketone alcohol thiol amide amine analine phenol Camphoric acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Capric acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Genisfein Ketone alcohol thiol amide amine analine phenol Genistein Phenol amine amide sulfoxide n pyridine cyano aldehyde Genistein Ether aromatic-N amide amine aromatic_s Sp2 amine sulfoxide chlorate Cinnamic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Citric Acid Alcohol alcohol ketone thiol amide amine analine phenol Citric Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Clemizole Pyrrolidine *alcohol pyridinium # *amide nitro *amine 'carboxilic acid Cyclamic Acid Amine alcohol ketone thiol amide amine analine phenol Cyclamic Acid Sulfonic Acid pyridine ketone aldehyde ether ester amide Carboxylic Acid Cysteine Amine alcohol ketone thiol amide amine analine phenol Cysteine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Cysteine Thiol carboxylic acid sodium aldehyde ketone -N cadmium Dlmethylglycine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Dimethylglycine Amine alcohol ketone thiol amide amine analine phenol D-ribose Ether aromatic-N amide amine aromatic s Sp2 amine sulfoxide chlorate D-ribose Alcohol alcohol ketone thiol amide amine analine phenol Fumaric Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Galactaric acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Galactaric acid alcohol alcohol ketone thiol amide amine analine phenol Chrysin Ketone alcohol thiol amide amine analine phenol Page 107 TABLE II JJ 2 d m ro m OF o O) jm HO m •>- SF* —< Or_ < oo o CO ""13 2o m U3 m d 3 Co-crystal Former Asparagine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Asparagine phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Asparagine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Aspartic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Aspartic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Benzenesulfonic Acid amine metals thioether sulfate alcohol Benzoic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Caffeine phosphate sulfate sulfone nitrate pyridine Carboxylic Acid mefals aldehyde Camphoric acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Capric acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Genistein phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Genistein alchohol ester ether n-oxide chlorine fluorine bromine Genistein chlorine cyano ester amine nitro nitrate bromine aldehyde Cinnamlcacid phosphate sulfate sulfone nitrate pyridine * carboxilic acid metals aldehyde Citric Acid phosphate' sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Citric Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Clemizole 'sulfonamide 'ketone ether triazole ammonium oxime 'chlorine Cyclamic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Cyclamic Acid amine metals thioether sulfate alcohol Cysteine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Cysteine phosphate sulfate sulfone nitrate pyridine carboxilic acid mefals aldehyde Cysteine arsenic chlorine alcohol potassium Ru Rb Sb Dimeihylglycine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Dimethylglycine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde D-ribose chlorine cyano ester amine nitro nitrate bromine aldehyde D-ribose phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Fumaric Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Galactaric acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Galactaric acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde ester Chrysin phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Ul £>. Ul Page 108 TABLE II D Tl D Tl < TT D ro m or -nm cn tj0 Z Sc ^ m> -C or po ""u § zg m 33 3 Co-crystal Former Asparagine ester ether cyano furan bromine chlorine s-heterocyclic Asparagine ester ether cyano furan bromine chlorine s-heterocyclic Asparagine ester ether cyano furan bromine chlorine s-heterocyclic Aspartic Acid ester ether cyano furan bromine chlorine s-heterocyclic Aspartic Acid ester ether cyano furan bromine chlorine s-heterocyclic Benzenesulfonic Acid Benzoic Acid ester ether cyano furan bromine chlorine s-heterocyclic Caffeine ester ether cyano furan bromine chlorine s-hetsrocyclic Camphoric acid ester ether cyano furan bromine chlorine s-heterocyclic Capric acid ester ether cyano furan bromine chlorine s-heterocyclic Genistein ester ether cyano furan bromine chlorine s-heterocyclic Genistein iodine ketone sulfonic acid sulfate phosphate phosphonic acid carboxylic acid nitro Genistein ketone peroxide epoxide heterocyclic-S iodine ester Cinnamic acid ester ether cyano furan bromine chlorine s-heterocyclic Citric Acid ester ether cyano furan bromine chlorine s-heterocyclic Citric Acid ester ether cyano furan bromine chlorine s-heterocyclic Clemizole thiol n-heterocyclic ring thionedisulfide pyrrolidindione iodine hydrazone thiocyanate 'bromine Cyclamic Acid ester ether cyano furan bromine chlorine s-heterocyclic Cyclamic Add Cysteine ester ether cyano furan bromine chlorine s-heterocyclic Cysteine ester ether cyano furan bromine chlorine s-heterocyclic Cysteine Dimethyfglycine ester ether cyano furan bromine chlorine s-heterocyclic Dimethylglycine ester ether cyano furan bromine chlorine s-heterocyclic D-ribose ketone peroxide epoxide heterocyclic-S iodine ester D-ribose ester ether cyano furan bromine chlorine s-heterocyclic Fumaric Acid ester ether cyano furan bromine chlorine s-heterocyclic Galactaric acid ester ether cyano furan bromine chlorine s-heterocyclic Galactaric; acid ether cyano furan bromine chlorine s-heterocyclic pyridine Chrysin ester ether cyano furan bromine chlorine s-heterocyclic Page 109 TABLE II z H m i«o op o> 3ITI DO 3> «? Or f»o ^■n c=> § NS m JO 2 Co-crystal Former Asparagine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Asparagine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Asparagine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Aspartic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Aspartic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Benzenesulfonic Acid Benzoic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Caffeine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Camphoric acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Capric add pyridine cyano n-heterocyclic ketone phosphate ester fluorine Genistein pyridine cyano n-heterocyclic ketone phosphate ester fluorine Genistein sulfone analine Genistein ether carboxylic acid sulfate sulfone alcohol Cinnamic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Citric Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Citric Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Clemizole hydroxamic acid cyano carboxamide 'sulfonic acid 'phosphoric acid N-oxide Cyclamic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Cyclamic Acid Cysteine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Cysteine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Cysteine Dimethylglycine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Dimethylglycine pyridine cyano n-heterocyclic ketone phosphate ester fluorine D-ribose ether carboxylic acid sulfate sulfone alcohol D-ribose pyridine cyano n-heterocycllc ketone phosphate ester fluorine Fumaric Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Galactaric acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Galactaric acid cyano n-heterocyclic ketone phosphate ester fluorine carbamate Chrysin pyridine cyano n-heterocyclic ketone phosphate ester fluorine Page 110 TABLE II Co-crystal Former Asparagine carbamate imidazole BF4 N-S02 thiourea iodine Asparagine carbamate imidazole BF4 N-S02 thiourea iodine epoxide Asparagine carbamate imidazole BF4 N-S02 thiourea iodine Aspartic Acid carbamate imidazole BF4 N-S02 thiourea iodine Aspartic Acid carbamate imidazole BF4 N-S02 thiourea iodine Benzenesulfonic Acid Benzoic Acid carbamate imidazole BF4 N-S02 thiourea iodine Caffeine carbamate imidazole BF4 N-S02 thiourea iodine Camphoric acid carbamate imidazole BF4 N-S02 thiourea iodine Capric acid carbamate imidazole BF4 N-S02 thiourea iodine Genistein carbamate imidazole BF4 N-S02 thiourea iodine Genistein Genistein phospphate cyanamide Cinnamic acid carbamate imidazole BF4 N-S02 thiourea iodine Citric Acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Citric Acid carbamate imidazole BF4 N-S02 thiourea iodine Clemizole ester ether fluorine acetate thione dithiadiazocyclopentadienyi Cyclamic Acid carbamate imidazole BF4 N-S02 thiourea iodine Cyclamic Acid Cysteine carbamate imidazole BF4 N-S02 thiourea iodine Cysteine carbamate imidazole BF4 N-S02 thiourea iodine Cysteine Dimethylglycine carbamate imidazole BF4 N-S02 thiourea iodine Dimethylglycine carbamate imidazole BF4 N-S02 thiourea iodine D-ribose phospphate cyanamide D-ribose carbamate imidazole BF4 N-S02 thiourea iodine epoxide Fumade Add carbamate imidazole BF4 N-S02 thiourea iodine Galactaric acid carbamate imidazole BF4 N-S02 thiourea iodine Galactaric acid imidazole BF4 Chrysin carbamate imidazole " BF4 N-S02 thiourea iodine Page 111 TABLE II fv> o> frii or 2}rT7, ^ Or ""■O, 25 N "O I m 33 Co-crystal Former Asparagine Asparagine peroxide Asparagine Aspartic Acid Aspartic Acid Benzenesulfonic Acid Benzoic Acid Caffeine Camphoric acid Capric add Genistein Genistein Genistein Cinnamic acid Citric Acid Citric Acid Clemizole Cyclamic Acid Cyclamic Acid Cysteine Cysteine Cysteine Dimethyiglydne Dimethylglycine D-ribose D-ribose Fumaric Add Galactaric add Galactaric add Chrysin Page 112 TABLE II Co-crystal Former Co-crystal Former Functional Group Interacting Group Chrysin Phenol amine amide sulfoxide n pyridine cyano aldehyde Chrysin Ether aromatic-N amide amine aromatic s Sp2 amine sulfoxide chlorate Gentisic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Gentisic acid Phenol amine amide sulfoxide n pyridine cyano aldehyde Glucamine, N-methyl alcohol alcohol ketone thiol amide amine analine phenol Glucamine, N-methyl Amine alcohol ketone thiol amide amine analine phenol Gluconic Acid Alcohol alcohol ketone thiol amide amine analine phenol Gluconic Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Glucosamine alcohol alcohol ketone thiol amide amine analine phenol Glucuronic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Glucuronic acid alcohol alcohol ketone thiol amide amine analine phenol Glucuronic acid Aldehyde alcohol ketone thiol amide amine analine phenol Glutamic Acid Amine alcohol ketone thiol amide amine analine phenol Glutamic Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Glutamine Amine alcohol ketone thiol amide amine analine phenol Glutamine Amide alcohol ketone thiol amide amine analine phenol Glutamine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Glutaric Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Glycine Amine alcohol ketone thiol amide amine analine phenol Glycine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Glycolic Acid Alcohol alcohol ketone thiol amide amine analine phenol Glycolic Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol HippuricAcid Amide alcohol ketone thiol amide amine analine phenol Hippuric Acid Amine alcohol ketone thiol amide amine analine phenol Hippuric Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Histidine Amine alcohol ketone thiol amide amine analine phenol Histidine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Histidine Imidazole imidazole chlorine acetamide carboxylase thione nitro Hydroquinone Alcohol alcohol ketone thiol amide amine analine phenol Hydroquinone Phenol amine amide sulfoxide n pyridine cyano aldehyde imidazole Amine alcohol ketone thiol amide amine analine phenol Page 113 TABLE II Co-crystal Former Chrysin alchohol ester ether n-oxide chlorine fluorine bromine Chrysin chlorine cyano ester amine nitro nitrate bromine aldehyde Gentisic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Gentisic acid alchohol ester ether n-oxide chlorine fluorine bromine Glucamine, N-methyl phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde ester Glucamine, N-methyl phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Gluconic Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Gluconic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Glucosamine phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Glucuronic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Glucuronic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde ester Glucuronic acid phosphate sulfate sulfone nitrate pyridine aromatic carboxilic acid metals aldehyde Glutamic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Glutamic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Glutamine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Glutamine phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Glutamine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde GlutaricAcid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Glycine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Glycine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Glycolic Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Glycolic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Hippuric Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Hippuric Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Hippuric Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Histidine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Histidine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Histidine cyanamide ketone cyano Carboxylic Acid alcohol thiol amine phosphinic acid hemihydrat e Hydroquinone phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Hydroquinone alchohol ester ether n-oxide chlorine fluorine bromine Imidazole phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Page 114 TABLE II Co-crystal Former Chrysin iodine ketone sulfonic acid sulfate phosphate phosphonic acid carboxylic acid nitro Chrysin ketone peroxide epoxide heterocyclic-S iodine ester Gentisic acid ester ether cyano furan bromine chlorine s-heterocyclic Gentisic acid iodine ketone sulfonic acid sulfate phosphate phosphonic acid carboxylic acid nitro Glucamine, N-methyl ether cyano furan bromine chlorine s-heterocyclic pyridine Glucamine, N-methyl ester ether cyano furan bromine chlorine s-heterocyciic Gluconic Acid ester ether cyano furan bromine chlorine s-heterocyclic Gluconic Acid ester ether cyano furan bromine chlorine s-heterocyclic Glucosamine ester ether cyano furan bromine chlorine s-heterocyclic Glucuronic acid ester ether cyano furan bromine chlorine s-heterocyclic Glucuronic acid ether cyano furan bromine chlorine s-heterocyclic pyridine Glucuronic acid ester ether cyano furan bromine chlorine s-heterocyclic Glutamic Acid ester ether cyano furan bromine chlorine s-heterocyciic Glutamic Acid ester ether cyano furan bromine chlorine s-heterocyclic Glutamine ester ether cyano furan bromine chlorine s-heterocyclic Glutamine ester ether cyano furan bromine chlorine s-heterocyciic Glutamine ester ether cyano furan bromine chlorine s-heterocyclic GlutaricAcid ester ether cyano furan bromine chlorine s-heterocyclic Glycine ester ether cyano furan bromine chlorine s-heterocyclic Glycine ester ether cyano furan bromine chlorine s-heterocyclic Glycolic Acid ester ether cyano furan bromine chlorine s-heterocyclic Glycolic Acid ester ether cyano furan bromine chlorine s-heterocyclic Hippuric Acid ester ether cyano furan bromine chlorine s-heterocyclic Hippuric Acid ester ether cyano furan bromine chlorine s-heterocyclic Hippuric Acid ester ether cyano furan bromine chlorine s-heterocyc/ic Histidine ester ether cyano furan bromine chlorine s-heterocyclic Histidine ester ether cyano furan bromine chlorine s-heterocyclic Histidine chlorine sulfonyl sulfoxide amide fluorine sulfonate ester Hydroquinone ester ether cyano furan bromine chlorine s-heterocyclic Hydroquinone iodine ketone sulfonic acid sulfate phosphate phosphonic acid carboxylic acid nitro Imidazole ester ether cyano furan bromine chlorine s-heterocyclic Page 115 TABLE II Co-crystal Former Chrysin sulfone analine Chrysin ether carboxylic acid sulfate sulfone alcohol Gentisic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Gentisic acid sulfone analine Glucamine, N-methyl cyano n-heterocyclic ketone phosphate ester fluorine carbamate Glucamine, N-methyl pyridine cyano n-heterocyclic ketone phosphate ester fluorine Gluconic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Gluconic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glucosamine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glucuronic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glucuronic acid cyano n-heterocyclic ketone phosphate ester fluorine carbamate Glucuronic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glutamic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glutamic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glutamine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glutamine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glutamine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glutaric Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glycine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glycine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glycolic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Glycolic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Hippuric Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Hippuric Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Hippuric Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Histidine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Histidine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Histidine Hydroquinone pyridine cyano n-heterocyclic ketone phosphate ester fluorine Hydroquinone sulfone analine Imidazole pyridine cyano n-heterocyclic ketone phosphate ester fluorine Page, 116 TABLE II Co-crystat Former Chrysin Chrysin phospphate cyanamide Gentisic acid carbamate imidazole BF4 N-S02 thiourea iodine Gentisic acid Glucamine, N-methyl imidazole BF4 Glucamine, N-methyl carbamate imidazole BF4 N-S02 thiourea iodine Gluconic Acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Gluconic Acid carbamate imidazole BF4 N-S02 thiourea iodine Glucosamine carbamate imidazole BF4 N-S02 thiourea iodine epoxide Glucuronic acid carbamate imidazole BF4 N-S02 thiourea iodine Glucuronic acid imidazole BF4 Glucuronic acid carbamate imidazole BF4 alkane aromatic N-S02 thiourea iodine epoxide Glutamic Acid carbamate imidazole BF4 N-S02 thiourea iodine Glutamic Acid carbamate imidazole BF4 N-S02 thiourea iodine Glutamine carbamate imidazole BF4 N-S02 thiourea iodine Glutamine carbamate imidazole BF4 N-S02 thiourea iodine epoxide Glutamine carbamate imidazole BF4 N-S02 thiourea iodine Glutaric Acid carbamate imidazole BF4 N-S02 thiourea iodine Glycine carbamate imidazole BF4 N-S02 thiourea iodine Glycine carbamate imidazole BF4 N-S02 thiourea iodine Glycolic Acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Glycolic Acid carbamate imidazole BF4 N-S02 thiourea iodine Hippuric Acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Hippuric Acid carbamate imidazole BF4 N-S02 thiourea iodine Hippuric Acid carbamate imidazole BF4 N-S02 thiourea iodine Histidine carbamate imidazole BF4 N-S02 thiourea iodine Histidine carbamate imidazole BF4 N-S02 thiourea iodine Histidine Hydroquinone carbamate imidazole BF4 N-S02 thiourea iodine epoxide Hydroquinone Imidazole carbamate imidazole BF4 N-S02 thiourea iodine Pag© 117 (V> o> r>o CO m i or "! i ns; Or is i s% m, 3D Co-crystal Former Chrysin Chrysin Gentisic acid Gentisic acid Glucamine, N-methyl Glucamine, N-methyl Gluconic Acid Gluconic Acid Glucosamine Glucuronic acid Glucuronic acid Glucuronic acid Glutamic Acid Glutamic Acid Glutamine Glutamine peroxide Glutamine Glutaric Acid Glycine Glycine Glycolic Acid Glycolic Acid Hippuric Acid peroxide Hippuric Acid Hippuric Acid Histidine Histidine Histidine Hydroquinone Hydroquinone Imidazole TABLE II Page 118 TABLE I! Co-crystal Former Co-crystal Former Functional Group Interacting Group Ipriflavone Ether aromatic-N amide amine aromatic_s Sp2 amine sulfoxide chlorate Ipriflavone Ketone alcohol _ thiol amide amine analine phenol Isoleucine Amine alcohol ketone thiol amide amine analine phenol Isoteuclne Carboxylic Acid alcohol ketone thiol amide amine analine phenol lactobionic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Lactobionic acid alcohol alcohol ketone thiol amide amine analine phenol Lactobionic acid Ether aromatic-N amide amine aromatic_s Sp2 amine sulfoxide chlorate Laurie acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Leucine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Leucine Amine alcohol ketone thiol amide amine analine phenol Lysine Amine alcohol ketone thiol amide amine analine phenol Lysine Carboxylic Acid alcohol ketone thiol amide amine analine phenoi Maleic Carboxylic Acid alcohol ketone thiol amide amine analine phenol Malic Acid Alcohol alcohol ketone thiol amide amine analine phenoi Malic Acid Carboxylic Acid alcohol ketone thiol amide amine anslins phenol Malonic Carboxylic Acid alcohol ketone thiol amide amine analine phenol Mandelic Acid Alcohol alcohol ketone thiol amide amine analine phenol Mandelic Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Methionine Amine alcohol ketone thiol amide amine analine phenol Methionine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Methionine Thioether -N amide amine _s Sp2 amine sulfoxide chlorate Nicotinamide Pyridine •alcohol * •amide nitro 'amine 'Carboxylic Acid Nicotinamide Amide alcohol ketone thiol amide amine analine phenol Nicotinic Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Nicotinic Acid Pyridine •alcohol * •amide nitro *amine 'Carboxyiic Acid Orotic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Orotic acid Lactam alcohol ketone thiol amide amine analine phenol Oxalic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Palmitic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Pamoic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Pamoic acid alcohol alcohol ketone thiol amide amine analine phenol Pamoic acid Phenol amine amide sulfoxide n pyridine cyano aldehyde Page 119 TABLE II Co-crystal Former Ipriflavone chlorine cyano ester amine nitro nitrate bromine aldehyde Ipriflavone phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Isoleucine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Isoleucine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde lactobionic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Lactobionic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde ester Lactobionic acid chlorine cyano ester amine nitro nitrate bromine aldehyde Laurie acid phosphate sulfate sulfone nitrate pyridine carboxiiic acid aldehyde Leucine phosphate sulfate sulfone 1 nitrate pyridine Carboxylic Acid metals aldehyde Leucine phosphate sulfate sulfone nitrate pyridine carboxitic acid metals aldehyde Lysine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Lysine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Maleic phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Malic Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Malic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Malonic phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Mandelic Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Mandelic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Methionine phosphate sulfate sulfone nitrate pyridine carboxiiic acid metals aldehyde Methionine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Methionine chlorine cyano ester amine nitro nitrate bromine aldehyde Nicotinamide *sulfonamide 'ketone ether triazole ammonium oxime 'chlorine Nicotinamide phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Nicotinic Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Nicotinic Acid "sulfonamide 'ketone ether triazole ammonium oxime 'chlorine Orotic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid aldehyde Orotic acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Oxalic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid aldehyde Palmitic acid phosphate sulfate sulfone nitrate pyridine carboxiiic acid aldehyde Pamoic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid aldehyde Pamoic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde ester Pamoic acid alchohol ester ether n-oxide chlorine fluorine bromine Page 120 TABLE II Co-crystal Former ipriflavone ketone peroxide epoxide heterocyclic-S iodine ester Ipriflavone ester ether cyano furan bromine chlorine s-heterocyclic Isoleucine ester ether cyano furan bromine chlorine s-heterocyclic Isoleucine ester ether cyano furan bromine chlorine s-heterocydic lactobionic acid ester ether cyano furan bromine chlorine s-heterocyclic Lactobionic acid ether cyano furan bromine chlorine s-heterocydic pyridine Lactobionic acid ketone peroxide epoxide heterocyclic-S iodine ester Laurie acid ester ether cyano furan bromine chlorine s-heterocydic Leucine ester ether cyano furan bromine chlorine s-heterocyclic Leucine ester ether cyano furan bromine chlorine s-heterocyclic Lysine ester ether cyano furan bromine chlorine s-heterocyclic Lysine ester ether cyano furan bromine chlorine s-heterocyclic Maleic ester ether cyano furan bromine chlorine s-heterocyclic Malic Acid ester ether cyano furan bromine chlorine s-heterocyclic Malic Add ester ether cyano furan bromine chlorine s-heterocyclic Malonic ester ether cyano furan bromine chlorine s-heterocyclic Mandelic Acid ester ether cyano furan bromine chlorine s-heterocyclic Mandelic Acid ester ether cyano furan bromine chlorine s-heterocyclic Methionine ester ether cyano furan bromine chlorine s-heterocyclic Methionine ester ether cyano furan bromine chlorine s-heterocyclic Methionine ketone peroxide epoxide Ag Se heterocyclic-S iodine ester Nicotinamide thiol n-heterocyclic ring thionedisulfide pyrrolidindione iodine hydrazone thiocyanate "bromine Nicotinamide ester ether cyano furan bromine chlorine s-heterocyclic Nicotinic Acid ester ether cyano furan bromine chlorine s-heterocyciic Nicotinic Acid thiol n-heterocyclic ring thionedisulfide pyrrolidindione iodine hydrazone thiocyanate "bromine Orotic acid ester ether cyano furan bromine chlorine s-heterocyclic Orotic acid ester ether cyano furan bromine chlorine s-heterocyclic Oxalic acid ester ether cyano furan bromine chlorine s-heterocyclic Palmitic acid ester ether cyano furan bromine chlorine s-heterocyclic Pamoic add ester ether cyano furan bromine chlorine s-heterocyclic Pamoic acid ether cyano furan bromine chlorine s-heterocyclic pyridine Pamoic acid iodine ketone sulfonic acid sulfate phosphate phosphonic acid carboxylic acid nitro Page 121 TABLE ii Co-crystal Former Ipriflavone ether carboxylic acid sulfate sulfone alcohol Ipriflavone pyridine cyano n-heterocyclic ketone phosphate ester fluorine Isoleucine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Isoleucine pyridine cyano n-heterocyclic ketone phosphate ester fiuorine lactobionic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Lactobionic acid cyano n-heterocyclic ketone phosphate ester fluorine carbamate Lactobionic acid ether carboxylic acid sulfate sulfone alcohol Laurie acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Leucine pyridine cyano n-hetsrocyclic ketone phosphate ester fluorine Leucine pyridine cyano n-heterocyciic ketone phosphate ester fluorine Lysine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Lysine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Maleic pyridine cyano n-heterocyclic ketone phosphate ester fluorine Malic Acid pyridine cyano n-heterocycllc ketone phosphate ester fluorine Malic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Malonic pyridine cyano n-heterocyclic ketone phosphate ester fluorine Mandelic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Mandelic Acid pyridine cyano n-heterocycNc ketone phosphate ester fluorine Methionine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Methionine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Methionine ether carboxylic acid sulfate sulfone alcohol Nicotinamide hydroxamic acid cyano carboxamide 'sulfonic acid *phosphoric acid N-oxide Nicotinamide pyridine cyano n-heterocyclic ketone phosphate ester fluorine Nicotinic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Nicotinic Acid hydroxamic acid cyano carboxamide 'sulfonic acid 'phosphoric acid N-oxide Orotic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Orotic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Oxalic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Palmitic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Pamoic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Pamoic acid cyano n-heterocyclic ketone phosphate ester fluorine carbamate Pamoic acid sulfone analine Page 122 TABLE II Co-crystal Former Ipriflavone phospphate cyanamide Ipriflavone carbamate imidazole BF4 N-S02 thiourea iodine Isoleucine carbamate imidazole BF4 N-S02 thiourea iodine Isoleucine carbamate imidazole BF4 N-S02 thiourea iodine lactobionic acid carbamate imidazole BF4 N-S02 thiourea iodine Lactobionic acid imidazole BF4 Lactobionic acid phospphate cyanamide Laurie acid carbamate imidazole BF4 N-S02 thiourea iodine Leucine carbamate imidazole BF4 N-S02 thiourea iodine Leucine carbamate imidazole BF4 N-S02 thiourea iodine Lysine carbamate imidazole BF4 N-S02 thiourea iodine Lysine carbamate imidazole BF4 N-S02 thiourea iodine Maleic carbamate imidazole BF4 N-S02 thiourea iodine Malic Acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Malic Acid carbamate imidazole BF4 N-S02 thiourea iodine Malonic carbamate imidazole BF4 N-S02 thiourea iodine Mandelic Acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Mandelic Acid carbamate imidazole BF4 N-S02 thiourea iodine Methionine carbamate imidazole BF4 N-S02 thiourea iodine Methionine carbamate imidazole BF4 N-S02 thiourea iodine Methionine phospphate Nicotinamide ester ether fluorine acetate thione dithiadiazocyclopentadienyl Nicotinamide carbamate imidazole BF4 N-S02 thiourea iodine epoxide Nicotinic Acid carbamate imidazole BF4 N-S02 thiourea iodine Nicotinic Acid ester ether fluorine acetate thione dithiadiazocyclopentadienyl Orotic acid carbamate imidazole BF4 N-S02 thiourea iodine Orotic acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Oxalic acid carbamate imidazole BF4 N-S02 thiourea iodine Palmitic acid carbamate imidazole BF4 N-S02 thiourea iodine Pamoic acid carbamate imidazole BF4 N-S02 thiourea iodine Pamoic acid imidazole BF4 Pamoic acid Page 123 Co-crystal Former Ipriflavone Ipriflavone Isoleucine Isoleucine lactobionic acid Lactobionic acid Lactobionic acid Laurie acid Leucine Leucine Lysine Lysine Maleic Malic Add MalicAdd Malonic Mandelic Add Mandelic Acid Methionine Methionine Methionine Nicotinamide Nicotinamide peroxide Nicotinic Acid Nicotinic Acid Orotic add Orotic acid peroxide Oxalic acid Palmitic acid Pamoic add Pamoic acid Pamoic add TABLE II Page 124 TABLE II Co-crystal Former Co-crystal Former Functional Group Interacting Group Phenylalanine Amine alcohol ketone thiol amide amine analine phenol Phenylalanine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Piperazine Amine alcohol ketone thiol amide amine analine phenol Procaine Amine alcohol ketone thiol amide amine analine phenol Procaine Ketone alcohol thiol amide amine analine phenol Proline Carboxyiic Acid alcohol ketone thiol amide amine analine phenol Proline Amine alcohol ketone thiol amide amine analine phenol p-Toluenesulfonic acid Sulfonic Acid pyridine ketone aldehyde ether ester amide Carboxylic Acid Pyridoxamine Alcohol alcohol ketone thiol amide amine analine phenol Pyridoxamine Amine alcohol ketone thiol amide amine analine phenol Pyridoxamine Pyridine 'alcohol # *amide nitro •amine •Carboxyiic Acid Pyridoxine (4-PyridoxicAcid) Pyridine •alcohol pyridinium * •amide nitro "amine "Carboxylic Acid Pyridoxine {4-Pyridoxic Acid) Alcohol alcohol ketone thiol amide amine analine phenol Pyroglutamic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Pyroglutamic add Lactam alcohol ketone thiol amide amine analine phenol Quercetin Ketone alcohol thiol amide amine analine phenol Quercetin Phenol amine amide sulfoxide n pyridine cyano aldehyde Quercetin Ether aromatic-N amide amine aromatic_s Sp2 amine sulfoxide chlorate Resveratrol Ketone alcohol thiol amide amine analine phenol Resveratrol Phenol amine amide sulfoxide n pyridine cyano aldehyde Saccharin Amide alcohol ketone thiol amide amine analine phenol Saccharin Ketone alcohol thiol amide amine analine phenol Saccharin Sulfoxide pyridine ketone aldehyde ether ester amide Carboxylic Acid Saccharin Amine alcohol ketone thiol amide analine phenol Salicylic Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Salicylic Acid Alcohol alcohol ketone thiol amide amine analine phenol Salicylic Acid, 4-amino Carboxylic Acid alcohol ketone thiol amide amine analine phenol Salicylic Acid, 4-amino alcohol alcohol ketone thiol amide amine analine phenol Salicylic Acid, 4-amino Amine alcohol ketone thiol amide amine analine phenol Page 125 TABLE If Co-crystal Former Phenylalanine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Phenylalanine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Piperazine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Procaine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Procaine phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Proline phosphate sulfate sulfone nitrate pyridine carboxilic add metals aldehyde Proline phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde p-Toluenesulfonic acid amine metals thioether sulfate alcohol Pyridoxamine phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Pyridoxamine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Pyridoxamine •sulfonamide 'ketone ether triazole ammonium oxime "chlorine Pyridoxine (4-Pyridoxic Acid) •sulfonamide •ketone ether triazole ammonium oxime •chlorine Pyridoxine (4-Pyridoxic Acid) phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Pyroglutamic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Pyroglutamic add phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Quercetin phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Quercetin alchohol ester ether n-oxide chlorine fluorine bromine Quercetin chlorine cyano ester amine nitro nitrate bromine aldehyde Resveratrol phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Resveratrol alchohol ester ether n-oxide chlorine fluorine bromine Saccharin phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Saccharin phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Saccharin amine metals thioether sulfate alcohol Saccharin phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Salicylic Acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Salicylic Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Salicylic Add, 4-amino phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Salicylic Add, 4-amino phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde ester Salicylic Add, 4-amino phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Page 126 TABLE II - Ji =.38.' 5 S s to of' *1 n§: 5: 3i Co-crystal Former Phenylalanine ester ether cyano furan bromine chlorine s-heterocyclic Phenylalanine ester ether cyano furan bromine chlorine s-heterocyclic Piperazine ester ether cyano furan bromine chlorine s-heterocyclic Procaine ester ether cyano furan bromine chlorine s-heterocyclic Procaine ester ether cyano furan bromine chlorine s-heterocyclic Proline ester ether cyano furan bromine chlorine s-heterocyciic Proline ester ether cyano furan bromine chlorine s-heterocyclic p-Toluenesulfonic add — Pyridoxamine ester ether cyano furan bromine chlorine s-heterocyclic Pyridoxamine ester ether cyano furan bromine chlorine s-heterocyclic Pyridoxamine thiol n-heterocyclic ring thionedisulfide iodine hydrazone thiocyanate 'bromine Pyridoxine (4-Pyridoxic Acid) thiol n-heterocyclic ring thionedisulfide pyrrolidindione iodine hydrazone thiocyanate 'bromine Pyridoxine (4-Pyridoxic Add) ester ether cyano furan bromine chlorine s-heterocyclic Pyroglutamic add ester ether cyano furan bromine chlorine s-heterocyclic Pyroglutamic acid ester ether cyano furan bromine chlorine s-heterocyclic Quercetin ester ether cyano furan bromine chlorine s-heterocyclic Quercetin iodine ketone sulfonic acid sulfate phosphate phosphonic acid carboxylic acid nitro Quercetin ketone peroxide epoxide heterocyclic-S iodine ester Resveratrol ester ether cyano furan bromine chlorine s-heterocyclic Resveratrol iodine ketone sulfonic acid sulfate phosphate phosphonic acid carboxylic acid nitro Saccharin ester ether cyano furan bromine chlorine s-heterocydic Saccharin ester ether cyano furan bromine chlorine s-heterocyclic Saccharin Saccharin ester ether cyano furan bromine chlorine s-heterocyclic Salicylic Acid ester ether cyano furan bromine chlorine s-heterocyclic Salicylic Acid ester ether cyano furan bromine chlorine s-heterocyclic Salicylic Acid, 4-amino ester ether cyano furan bromine chlorine s-heterocyclic Salicylic Acid, 4-amino ether cyano furan bromine chlorine s-heterocyclic pyridine Salicylic Acid, 4-amino ester ether cyano furan bromine chlorine s-heterocyclic Page 127 TABLE II Co-crystal Former Phenylalanine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Phenylalanine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Piperazine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Procaine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Procaine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Proline pyridine cyano n-heterocyclic ketone phosphate ester fluorine Proline pyridine cyano n-heterocyclic ketone phosphate ester fluorine p-Toluenesulfonic acid Pyridoxamine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Pyridoxamine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Pyridoxamine hydroxamic acid cyano carboxamide 'sulfonic acid •phosphoric acid N-oxide Pyridoxine (4-Pyridoxic Acid) hydroxamic acid cyano carboxamide 'sulfonic acid •phosphoric acid N-oxide Pyridoxine (4-Pyridoxic Acid) pyridine cyano n-heterocyclic ketone phosphate ester fluorine Pyroglutamic add pyridine cyano n-heterocyclic ketone phosphate ester fluorine Pyroglutamic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Quercetin pyridine cyano n-heterocyclic ketone phosphate ester fluorine Quercetin sulfone analine Quercetin ether carboxylic add sulfate sulfone alcohol Resveratrol pyridine cyano n-heterocyclic ketone phosphate ester fluorine Resveratrol sulfone analine Saccharin pyridine cyano n-heterocyclic ketone phosphate ester fluorine Saccharin pyridine cyano n-heterocyclic ketone phosphate ester fluorine Saccharin Saccharin pyridine cyano n-heterocyclic ketone phosphate ester fluorine Salicylic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Salicylic Acid pyridine cyano n-heterocydic ketone phosphate ester fluorine Salicylic Acid, 4-amino pyridine cyano n-heterocyclic ketone phosphate ester fluorine Salicylic Add, 4-amino cyano n-heterocyclic ketone phosphate ester fluorine carbamate Salicylic Acid, 4-amino pyridine cyano n-heterocyclic ketone phosphate ester fluorine Page 128 TABLE II Co-crystal Former Phenylalanine carbamate imidazole BF4 N-S02 thiourea iodine Phenylalanine carbamate imidazole BF4 N-S02 thiourea iodine Piperazine carbamate imidazole BF4 N-S02 thiourea iodine Procaine carbamate imidazole BF4 N-S02 thiourea iodine Procaine carbamate imidazole BF4 N-S02 thiourea iodine Proline carbamate imidazole BF4 N-S02 thiourea iodine Protine carbamate imidazole BF4 N-S02 thiourea iodine p-Toluenesulfonic acid Pyridoxamine carbamate imidazole BF4 N-S02 thiourea iodine epoxide Pyridoxamine carbamate imidazole BF4 N-S02 thiourea iodine Pyridoxamine ester ether fluorine acetate thione dithiadiazocyclopentadienyl Pyridoxine (4-Pyridoxic Acid) ester ether fluorine acetate thione dithiadiazocyclopentadienyl Pyridoxine (4-Pyridoxic Acid) carbamate imidazole BF4 N-S02 thiourea iodine epoxide Pyroglutamic acid carbamate imidazole BF4 N-S02 thiourea iodine Pyroglutamic acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Quercetin carbamate imidazole BF4 N-S02 thiourea iodine Quercetin Quercetin phospphate cyanamide Resveratrol carbamate imidazole BF4 N-S02 thiourea iodine Resveratrol Saccharin carbamate imidazole BF4 N-S02 thiourea iodine epoxide Saccharin carbamate imidazole BF4 N-S02 thiourea iodine Saccharin Saccharin carbamate imidazole BF4 N-S02 thiourea iodine Salicylic Acid carbamate imidazole BF4 N-S02 thiourea iodine Salicylic Acid carbamate imidazole BF4 N-S02 thiourea iodine epoxide Salicylic Acid, 4-amino carbamate imidazole BF4 N-S02 thiourea iodine Salicylic Acid, 4-amino imidazole BF4 Salicylic Acid, 4-amino carbamate imidazole BF4 N-S02 thiourea iodine Page 129 Co-crystal Former Phenylalanine Phenylalanine Piperazine Procaine Procaine Proline Proline p-Toluenesulfbnic acid Pyridoxamine Pyridoxamine Pyridoxamine Pyridoxine (4-Pyridoxic Acid) Pyridoxine (4-Pyridoxic Acid) Pyroglutamic acid Pyroglutamic acid peroxide Quercetin Quercetin Quercetin Resveratrol Resveratrol Saccharin peroxide Saccharin Saccharin Saccharin Salicylic Add Salicylic Acid Salicylic Acid, 4-amino Salicylic Acid, 4-amino Salicylic Acid, 4-amino TABLE II Page 130 TABLE II - oj?' iMi - se « "V ® £8: ntj 3 Co-crystal Former Co-crystal Former Functional Group Interacting Group Sebacic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Serine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Serine Amine alcohol ketone thiol amide amine analine phenol Serine Alcohol alcohol ketone thiol amide amine analine phenol Stearic acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Succinic Acid Carboxylic Acid alcohol ketone thiol amide amine anafine phenol Tartaric Acid Carboxylic Acid alcohol ketone thiol amide amine analine phenol Threonine Amine alcohol ketone thiol amide amine analine phenol Threonine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Threonine alcohol alcohol ketone thiol amide amine analine phenol Tris Amine alcohol ketone thiol amide amine analine phenol Tris Alcohol alcohol ketone thiol amide amine analine phenol Tryptophan Amine alcohol ketone thiol amide amine analine phenol Tryptophan Carboxylic Acid alcohol ketone thiol amide amine analine phenol Tryptophan Indole *alcohol pyridinium * *amide nitro •amine 'carboxilic acid Tyrosine Amine alcohol ketone thiol amide amine analine phenol Tyrosine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Tyrosine Alcohol alcohol ketone thiol amide amine analine phenol Urea Ketone alcohol thiol amide amine analine phenol Urea Amine alcohol ketone thiol amide amine analine phenol Urea Amide alcohol ketone thiol amide amine analine phenol Valine Amine alcohol ketone thiol amide amine analine phenol Valine Carboxylic Acid alcohol ketone thiol amide amine analine phenol Vitamin K5 Amine alcohol ketone thiol amide amine analine phenol Vitamin KS Alcohol alcohol ketone thiol amide amine analine phenol Xylitol Alcohol alcohol ketone thiol amide amine analine phenol Page 131 TABLE II Co-crystal Former Sebacic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Serine phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Serine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Serine phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Stearic acid phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Succinic Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Tartaric Acid phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Threonine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Threonine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Threonine phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Tris phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Tris phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Tryptophan phosphate sulfate sulfone nitrate pyridine carboxilic acid metats aldehyde Tryptophan phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Tryptophan 'sulfonamide •ketone ether triazole ammonium oxime •chlorine Tyrosine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Tyrosine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Tyrosine phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Urea phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Urea phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Urea phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Valine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Valine phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Vitamin K5 phosphate sulfate sulfone nitrate pyridine carboxilic acid metals aldehyde Vitamin K5 phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Xylitol phosphate sulfate sulfone nitrate pyridine Carboxylic Acid metals aldehyde Page 132 TABLE I! P ok -nrfl , -Q op rrit- ■p.

: Or . , "o » r-J"0 m 1' Co-crystal Former Sebaclc acid ester ether cyano furan bromine chlorine s-heterocyclic Serine ester ether cyano furan bromine chlorine s-heterocyclic Serine ester ether cyano furan bromine chlorine s-heterocyclic Serine ester ether cyano furan bromine chlorine s-heterocyclic Stearic acid ester ether cyano furan bromine chlorine s-heterocyclic Succinic Acid ester ether cyano furan bromine chlorine s-heterocyclic Tartaric Acid ester ether cyano furan bromine chlorine s-heterocyclic Threonine ester ether cyano furan bromine chlorine s-heterocyclic Threonine ester ether cyano furan bromine chlorine s-heterocyciic Threonine ester ether cyano furan bromine chlorine s-heterocyclic Tris ester ether cyano furan bromine chlorine s-heterocyclic Tris ester ether cyano furan bromine chlorine s-heterocyclic Tryptophan ester ether cyano furan bromine chlorine s-heterocyclic Tryptophan ester ether cyano furan bromine chlorine s-heterocyclic Tryptophan thiol n-heterocycllc ring thionedisulfide pyrrolidindione iodine hydrazone thiocyanate •bromine Tyrosine ester ether cyano furan bromine chlorine s-heterocyclic Tyrosine ester ether cyano furan bromine chlorine s-heterocyclic Tyrosine ester ether cyano furan bromine chlorine s-heterocyclic Urea ester ether cyano furan bromine chlorine s-heterocyclic Urea ester ether cyano furan bromine chlorine s-heterocyclic Urea ester ether cyano furan bromine chlorine s-heterocyclic Valine ester ether cyano furan bromine chlorine s-heterocyclic Valine ester ether cyano furan bromine chlorine s-heterocyclic Vitamin K5 ester ether cyano furan bromine chlorine s-heterocyclic Vitamin K5 ester ether cyano furan bromine chlorine s-heterocyclic Xytitoi ester ether cyano furan bromine chlorine s-heterocyclic Page 133 TABLE it Co-crystal Former Sebacicacid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Serine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Serine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Serine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Stearic acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine Succinic Acid pyridine cyano n-heterocyclic ketone phosphate ester fluorine _ Tartaric Acid pyridine cyano n-heterocyciic ketone phosphate ester fluorine Threonine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Threonine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Threonine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Tris pyridine cyano n-heterocyclic ketone phosphate ester fluorine Tris pyridine cyano n-heterocyclic ketone phosphate ester fluorine Tryptophan pyridine cyano n-heterocyclic ketone phosphate ester fluorine Tryptophan pyridine cyano n-heterocyclic ketone phosphate ester fluorine Tryptophan hydroxamic acid cyano carboxamide "sulfonic acid •phosphoric acid N-oxide Tyrosine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Tyrosine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Tyrosine pyridine cyano n-heterocydic ketone phosphate ester fluorine Urea pyridine cyano n-heterocyclic ketone phosphate ester fluorine Urea pyridine cyano n-heterocyclic ketone phosphate ester fluorine Urea pyridine cyano n-heterocyclic ketone phosphate ester fluorine Valine pyridine cyano n-heterocydic ketone phosphate ester fluorine Valine pyridine cyano n-heterocyclic ketone phosphate ester fluorine Vitamin K5 pyridine cyano n-heterocyclic ketone phosphate ester fluorine Vitamin K5 pyridine cyano n-heterocyclic ketone phosphate ester fluorine Xylitol pyridine cyano n-heterocyclic ketone phosphate ester fluorine Page 134 TABLE II co m or 3jm HO OH or ""■o 233 N% m 3D Co-crystal Former Sebacic acid carbamate imidazole BF4 N-S02 thiourea iodine Serine carbamate imidazole BF4 N-S02 thiourea iodine Serine carbamate imidazole BF4 N-S02 thiourea iodine Serine carbamate imidazole BF4 N-S02 thiourea iodine epoxide Stearic acid carbamate imidazole BF4 N-S02 thiourea iodine Succinic Acid carbamate imidazole BF4 N-S02 thiourea iodine Tartaric Acid carbamate imidazole BF4 N-S02 thiourea iodine Threonine carbamate imidazole BF4 N-S02 thiourea iodine Threonine carbamate imidazole BF4 N-S02 thiourea iodine Threonine carbamate imidazole BF4 N-S02 thiourea iodine epoxide Tris carbamate imidazole BF4 N-S02 thiourea iodine Tris carbamate imidazole BF4 N-S02 thiourea iodine epoxide Tryptophan carbamate imidazole BF4 N-S02 thiourea iodine Tryptophan carbamate imidazole BF4 N-S02 thiourea iodine Tryptophan ester ether fluorine acetate thione dithiadiazocyclopentadienyl Tyrosine carbamate imidazole BF4 N-S02 thiourea iodine Tyrosine carbamate imidazole BF4 N-S02 thiourea iodine Tyrosine carbamate imidazole BF4 N-S02 thiourea iodine epoxide Urea carbamate imidazole BF4 N-S02 thiourea iodine Urea carbamate imidazole BF4 N-S02 thiourea iodine Urea carbamate imidazole BF4 N-S02 thiourea iodine epoxide Valine carbamate imidazole BF4 N-S02 thiourea iodine Valine carbamate imidazole BF4 N-S02 thiourea iodine Vitamin K5 carbamate imidazole BF4 N-S02 thiourea iodine Vitamin K5 carbamate imidazole BF4 N-S02 thiourea iodine epoxide Xylitol carbamate imidazole BF4 N-S02 thiourea iodine epoxide Page 135 S! ro o,r 3o OS £ -< i CA Or 25 i N "O m 33 3 Co-crystal Former Sebacicacid Serine Serine Serine Stearic acid Succinic Acid Tartaric Acid Threonine Threonine Threonine Tris Tris Tryptophan Tryptophan Tryptophan Tyrosine Tyrosine Tyrosine Urea Urea Urea peroxide Valine Valine Vitamin K5 Vitamin K5 Xylitol TABLE II Pap 136 TABLE III Functional Group Functional Group Structure Interacting Group pyridine •alcohol pyridinium •amide nitro *amine •carboxilic acid Imidazole 0 imidazole chlorine acetamide carboxylate thione nitro Hydroxamic acid I h hydroxamic acid alcohol phosphinic ester . alkane pyridine amide peroxide R 0 OH ester peroxide amide ether alkane N-heterocycle epoxide A alkane bromine alcohol ester epoxide amide thioester R 3 v O aromatic thioester alkane sulfamide hydroxy bromine thfoketone s alkane thioketone ketone SULFAMIDE AMINE thiol Page 137 TABLE III rr gp so OH - or 35 INJ cn Jt* -< CO N° m jj Functional Group pyridine •sulfonamide •ketone ether triazole alkane ammonium oxime •chlorine alkyne thiol imidazole cyanamide ketone cyano carboxilic acid alcohol alkane thiol amine phosphinic acid hemihydrate chlorine Hydroxamic acid sulfonamide carboxylate phosphine amine aromatic peroxide aromatic alcohol pyrimidinedione analine thiazole peroxy acid ketone carboxilic acid azide phosphine oxide epoxide alkene hydrazone aromatic thioether ketone aldehyde chlorine carboxilic acid alkyne thioester Iodine amine cyano thioketone amide chlorine nitro thioketone sulfoxide 0X0 chlorine bromine AROMATIC alkene sulfone iodine AZOXY potassium cn 01 Page 138 TABLE III 33 m l>o m op o CT5 3o m «I ~< Or- < ;—> ~"-o m N° m □ 3J 3 \ Functional Group pyridine n-heterocyclic ring thionedisulfide pyrrolidindione iodine hydrazone thiocyanate *bromine aromatic hydroxamic acid cyano imidazole sulfbnyl sulfoxide amide fluorine sulfonate ester Hydroxamic acid peroxide sulfonamide analine epoxide ammonium fluorine nitro amine cyano thioester thioketone epoxide n-oxide cyano iron cobalt amine sulfate Page 139 TABLE 111 Z H m INJ Op ar> sl -< O"- Cs? S CO N° m JD 3 Functional Group pyridine carboxamide •sulfonic acid •phosphoric acid N-oxide ester ether fluorine acetate thione dithiadiazocydo pentadienyl imidazole Hydroxamic acid peroxide epoxide thioester thioketone Page 140 1 TABLE lit zd m o m < m o m ro Op cn 3o g Eg M-"T3 £§ N-0 m 33 I rr» m r-o oF O) 13 > r— 3 t3 n Functional Group pyridine imidazole Hydroxamic acid peroxide epoxide thioester thioketone 01 & Page 141 TABLE III 0 ZD 177 D Tl rs> cn 3> _ -< -• JS> m O. 5m 3D P*;=i > Or ^-0 O •\l m 30 3 Functional Group Functional Group Structure Interacting Group nitrate ester 0, no2 aromatic amide alkane chlorine nitrate ester bromine Thiophosphate ester-0 s II 0 P 0" I oh amine imidazole cyclic amide Phosphate ester 0 II 0 P O- 1 oh aromatic alcohol phosphate ester aromatic faring pyridine analine Ketone J ) alcohol ketone thiol amide amine analine Aldehyde c R > H alcohol ketone thiol amide amine - analine Thiol R SH carboxylic acid sodium aldehyde ketone aromatic-N cadmium Alcohol R OH alcohol ketone thiol amide amine analine Page 142 TABLE III Functional Group nitrate ester alcohol ether acetate Thiophosphate ester-0 Phosphate ester amine sodium potassium lithium carboxylic acid amide alkane Ketone phenol phosphate sulfate sulfone nitrate pyridine aromatic carboxilic acid metals aldehyde Aldehyde phenol phosphate sulfate sulfone nitrate pyridine aromatic carboxilic acid metals aldehyde Thiol alkane arsenic chlorine alcohol potassium Ru aromatic Rb Sb Alcohol phenol phosphate sulfate sulfone nitrate pyridine aromatic carboxilic acid metals aldehyde Page 143 TABLE III 3J m D 77 n i rn M O f f i rs> "ri o (a N Tl m i Functional Group nitrate ester Thiophosphate ester-0 Phosphate ester Ketone ester ether cyano furan bromine chlorine s-heterocyclic pyridine cyano Aldehyde ester ether cyano furan bromine chlorine s-heterocyciic pyridine cyano Thiol Alcohol ester ether cyano furan bromine chlorine s-heterocyclic pyridine cyano Page 144 TABLE III Functional Group nitrate ester Thiophosphate ester-0 phosphate ester Ketone n-heterocyclic ketone phosphate ester fluorine carbamate imidazole BF4 alkane aromatic N-SQ2 Aldehyde n-heterocyclic ketone phosphate ester fluorine carbamate imidazole BF4 alkane aromatic N-S02 Thiol Alcohol n-heterocyclic ketone phosphate ester fluorine carbamate imidazole BF4 alkane aromatic N-S02 Page 145 Functional Group nitrate ester Thiophosphate ester-O Phosphate ester Ketone thiourea iodine Aldehyde thiourea iodine epoxide Thiol Alcohol thiourea iodine epoxide TABLE 111 Page 146 TABLE III Functional Group Functional Group Structure Interacting Group Thioether FT R aromatic-N amide amine aromatic s Sp2 amine sulfoxide Ether .CL R R aromatic-N amide amine aromatic s Sp2 amine sulfoxide Cyanamide N C=N cyano amine potassium aromatic-N bromine sodium Thiocyanate o II z aromatic-S ester ether sP2 amine NH thioether ether metals MoOCH BF4 bromine Amine primary R NH2 alcohol ketone thiol amide amine analine Amine secondary R2 NH alcohol ketone thiol amide amine analine Page. 147 TABLE III Functional Group Thioether chlorate chlorine alkyne cyano ester amine nitro nitrate bromine aldehyde Ether chlorate chlorine alkyne cyano ester amine nitro nitrate bromine aldehyde Cyanamide imidazole ether n-heterocyclic alcohol cesium Ag Thiocyanate sP2 amine chlorine Sp2 amine sulfate Osmium Amine primary phenol phosphate sulfate sulfone nitrate pyridine aromatic carboxilic acid metals aldehyde Amine secondary phenol phosphate sulfate sulfone nitrate pyridine aromatic carboxilic acid metals aldehyde Page 148 TABLE III Functional Group .

Thioether ketone peroxide epoxide Ag Se heterocyclic-S iodine ester ether carboxylic acid Ether ketone peroxide epoxide Ag Se heterocyclic-S iodine ester ether carboxylic acid Cyanamide Thiocyanate sP2 amine Amine primary ester ether cyano furan bromine chlorine s-heterocyclic pyridine cyano Amine secondary ester ether cyano furan bromine chlorine s-heterocyclic pyridine cyano Page 149 TABLE III Functional Group Thioether sulfate sulfone alkane alcohol phospphate Ether sulfate sulfone alkane alcohol phospphate cyanamide Cyanamide Thiocyanate sP2 amine Amine primary n-heterocyclic ketone phosphate ester fluorine carbamate imidazole BF4 alkane aromatic N-S02 Amine secondary n-heterocyclic ketone phosphate ester fluorine carbamate imidazole BF4 alkane aromatic N-S02 Page. 150 TABLE III m »N» oP => 3§ —< o fO "^-n § z*> s go m 23 Functional Group Thioether Ether Cyanamide Thiocyanate sP2 amine Amine primary thiourea iodine Amine secondary thiourea iodine Page 151 TABLE 111 z H m OF CD 3D >■ 82 -< or- i ""x CO N% m 3D 3 Functional Group Functional Group Structure Interacting Group Amine tertiary R3 —n alcohol ketone thiol amide amine analine c i Amide r nh2 alcohol ketone thiol amide amine analine 0 ii r s 0- ii Sulfonic acid II o pyridine ketone aldehyde ether ester amide 0 ii r p 0* 1 Phosphinic acid 1 r alkane potassium lithium n-heterocyclic oxime amide 0 ii r p o- 1 Phosphonic acid oh alkane potassium lithium n-heterocyclic oxime amide c j ) Carboxylic acid alcohol ketone thiol amide amine analine Page 152 TABLE 111 U m d n n J cn z H m Of 33 rn Ho i H ~< Of 50 ""-c 8 z5 nS 2 3 Functional Group Amine tertiary phenol phosphate sulfate sulfone nitrate pyridine aromatic carboxilic acid metals aldehyde Amide phenol phosphate sulfate sulfone nitrate pyridine aromatic carboxilic acid metals aldehyde Sulfonic acid carboxilic acid amine metals thioether sulfate alcohol Phosphinic acid phenol aromatic amine alcohol metals Phosphonic acid phenol aromatic amine alcohol metals carboxylic acid Sp2 amine analine ether Carboxyiic acid phenol phosphate sulfate sulfone nitrate pyridine aromatic carboxilic acid metals aldehyde Page 153 TABLE 111 Functional Group Amine tertiary ester ether cyano furan bromine chlorine s-heterocyclic pyridine cyano Amide ester ether cyano furan bromine chlorine s-heterocyclic pyridine cyano Sulfonic acid Phosphinic acid Phosphonic acid phosphonic acid aromatic-N ketone aldehyde imidazole Carboxylic acid ester ether cyano furan bromine chlorine s-heterocyclic pyridine cyano Page 154 TABLE III Functional Group Amine tertiary n-heterocyclic ketone phosphate ester fluorine carbamate imidazole BF4 alkane aromatic N-S02 Amide n-heterocyclic ketone phosphate ester fluorine carbamate imidazole BF4 alkane aromatic N-S02 Sulfonic acid Phosphinic acid Phosphonic acid Carboxylic acid n-heterocyclic ketone phosphate ester fluorine carbamate imidazole BF4 alkane aromatic N-S02 Page 155 m i or Ijjm ° OH Or v ^5 -5' Functional Group Amine tertiary thiourea iodine Amide thiourea iodine epoxide peroxide Sulfonic acid Phosphinic acid Phosphonic acid Carboxylic acid thiourea iodine TABLE 111 Page 156 TABLE III m IN* OP °» 38j |S0 ^ or- I ^ """D § ^O-1 s r»%! rn f -Ii Functional Group Functional Group Structure Interacting Group Sulfate ester 0 II 0 i 0 o pyridine ketone aldehyde ether ester amide Oxime C N OH alcohol alkane amine amide ether ester Nitrile C=N metal ketone phenol alcohol cyano Diazo RH2C N N CH2R Oxime Nitro no2 pyridine ketone aldehyde elher ester amide S-heterocyclic ring Ci n n alcohol thioketone thioether s-heterocyclic ketone aromatic Thiophene o chlorine fluorine amide ketone NO SO Page 157 TABLE III J Functional Group Sulfete ester carboxilic acid amine metals thioether sulfate alcohol Oxime pyridine n-aromatic chlorate chlorine Sp2-N diazo thioketone cyano n-oxide ketone Nitrile amine analine bromine amide alkane carboxylic acid chlorine n-heterocyclic aromatic potassium Diazo Nitro carboxilic acid amine metals thioether sulfate alcohol S-heterocyclic ring alkene amine chlorine BF4 sulfate ester NO ether amide iodine Thiophene CO cn £>. Ol Page 158 TABLE III Functional Group Sulfate ester Oxime aldehyde carboxylic acid bromine aromatic pyridine BF4 Nitrile aldehyde thioether pyridine n- aromatic bromine ether s-aromatic thiophene Diazo Nitro S-heterocyclic ring carboxylic acid sodium cyano chloride furan Thiophene Page 159 TABLE III Functional Group Sulfate ester Oxime Nitrile Diazo Nitro S-heterocyclic ring Thiophene Ul £>. Ul Page 160 TABLE 111 o cn 2| rrf {N> 3m . 5° i ^7$ Or- , 3 Functional Group Sulfate ester Oxime Nitrile Diazo Nitro S-heterocyclic ring Thiophene Page 161 TABLE III o/r; s §3' . Or-, ^ """D S ° *S 3: 3i Functional Group Functional Group Structure Interacting Group N-heterocyclic ring H n n alcohol thioketone thioether s-heterocyclic ketone aromatic O-heterocyclic ring o alcohol thioketone thioether s-heterocyclic ketone aromatic Pyrrole chlorine fluorine amide ketone NO SO Furan o s-heterocyclic Pag© 162 TABLE III ^ op s |o £ ~< 0£ ""td a ® K/P< Functional Group N-heterocyclic ring alkene amine chlorine BF4 sulfate ester NO ether amide iodine O-heterocyclic ring alkene amine chlorine BF4 sulfate ester NO ether amide iodine Pyrrole CO imidazole pyridine n-aromatic aldehyde carboxylic acid sulfate chlorine bromine oxime Furan Page 163 TABLE 111 Functional Group N-heterocyclic ring carboxylic acid sodium cyano chloride aldehyde O-heterocyclic ring Pyrrole carboxylic acid alcohol sodium phenol cyano ester chloride ether aldehyde Page 164 TABLE III Functional Group N-heterocyclic ring O-heterocyclic ring Pyrrole Furan ni | Op *8! »s> o> : £>% me §r "E •*§/ Si No Page 165 Functional Group N-heterocyclic ring O-heterocyclic ring Pyrrole Furan TABLE III Page 166

Claims (43)

545133 What we claim is:

1. A co-crystal comprising modafmil and a co-crystal former selected from the group consisting of: malonic acid, glycolic acid, fumaric acid, tartaric acid, citric acid, succinic acid, gentisic acid, oxalic acid, l-hydroxy-2-naphthoic acid, orotic acid, glutaric acid, L-tartaric acid, palmitic acid, L-proline, salicylic acid, lauric acid, L-malic acid, and maleic acid.

2. The co-crystal according to claim 1, wherein: (a) the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (i) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.08,9.28, and 16.81 degrees; (ii) said co-ciystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 16.81,18.27, and 19.45 degrees; (iii) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.28,19.45, and 22.83 degrees; (iv) said co-ciystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.08 and 9.28 degrees; (v) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 16.81 and 19.45 degrees; (vi) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 18.27 and 22.83 degrees; (vii) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises a peak at 5.08 degrees; (viii) said co-ciystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.28 degrees; or (ix) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises a peak at 16.81 degrees; 545133 {b) the co-crystal is characterized by a DSC thermogram, wherein said co-ciystal is a modafmil:malonic acid co-crystal and said DSC thermogram comprises an endothermic transition at about 116 degrees C; or (c) the co-crystal is characterized by a Raman spectrum comprising peaks expressed in terms of cm"1, wherein: (i) said co-crystal is a modafinikmalonic acid co-crystal and said Raman spectrum comprises peaks at 1004,633, and 265; (ii) said co-crystal is a modafinikmalonic acid co-crystal and said Raman spectrum comprises peaks at 1032,1601, and 767; (iii) said co-ciystal is a modafinikmalonic acid co-crystal and said Raman spectrum comprises peaks at 1004 and 633; (iv) said co-ciystal is a modafinikmalonic acid co-ciystal and said Raman spectrum comprises peaks at 1183 and 767; or (v) said co-crystal is a modafinikmalonic acid co-crystal and said

3. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2- theta angles wherein: (a) said co-ciystal is a modafinikglycolic acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.51,15.97, and 20.03 degrees; (b) said co-crystal is a modafinikglycolic acid co-crystal and said X-ray diffraction pattern comprises peaks at 14.91, 19.01, and 22.75 degrees; (c) said co-crystal is a modafinikglycolic acid co-crystal and said X-ray diffraction pattern comprises peaks at 15.97,25.03, and 25.71 degrees; (d) said co-crystal is a modafinikglycolic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 9.51 and 15.97 degrees; (e) said co-crystal is a modafmikglycolic acid co-crystal and said X-ray diffraction pattern comprises peaks at 20.03 and 25.03 degrees; (f) said co-crystal is a modafinikglycolic acid co-crystal and said X-ray diffraction pattern comprises peaks at 15.97 and 25.03 degrees; (g) said co-crystal is a modafinikglycolic acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.51 degrees; Raman spectrum comprises peaks at 1601 and 718. 1980889_1.DOC 168 545133 (h) said co-crystal is a modafinikglycolic acid co-crystal and said X-ray diffraction pattern comprises a peak at 15.97 degrees; or (i) said co-crystal is a modafinikglycolic acid co-crystal and said X-ray diffraction pattern comprises a peak at 20.03 degrees.

4. The co-crystal according to claim 1, wherein: (a) the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (i) said co-crystal is a modafinil :maleic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 4.69,6.15, and 9.61 degrees; (ii) said co-crystal is a modafinil rmaleic acid co-crystal and said X-ray diffraction pattern comprises peaks at 10.23, 19.97, and 21.83 degrees; (iii) said co-crystal is a modafinil :maleic acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.69,10.23, and 21.83 degrees; (iv) said co-ciystal is a modafinil :maleic acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.69 and 19.97 degrees; (v) said co-crystal is a modafinil :maleic acid co-crystal and said X-ray diffraction pattern comprises peaks at 6.15 and 9.61 degrees; (vi) said co-ciystal is a modafinil :maleic acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.69 and 6.15 degrees; (vii) said co-crystal is a modafmil:maleic acid co-crystal and said X-ray diffraction pattern comprises a peak at 4.69 degrees; (viii) said co-crystal is a modafinilrmaleic acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.61 degrees; or (ix) said co-crystal is a modafmil :maleic acid co-crystal and said X-ray diffraction pattern comprises a peak at 19.97 degrees; or (b) the co-crystal is characterized by a DSC thermogram, wherein said co-crystal is a modafinihmaleic acid co-ciystal and said DSC thermogram comprises an endothermic transition at about 168 degrees C. 545133

5. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2- theta^angles, wherein: (a) said co-crystal is a modafinil:L-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 6.10, 14.33, and 20.71 degrees; (b) said co-crystal is a modafmil:L-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 16.93,20.15, and 22.49 degrees; (c) said co-crystal is a modafinil:L-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 16.93,20.71, and 29.72 degrees; (d) said co-crystal is a modafinil:L-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 6.10 and 20.15 degrees; (e) said co-crystal is a modafinil:L-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 14.33 and 20.71 degrees; (f) said co-crystal is a modafinil:L-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 7.36 and 25.04 degrees; (g) said co-crystal is a modafinil:L-tartaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 6.10 degrees; (h) said co-crystal is a modafinil:L-tartaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 16.93 degrees; or (i) said co-crystal is a modafinil:L-tartaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 20.71 degrees.

6. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (a) said co-crystal is a modafinilrcitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.29, 7.29, and 9.31 degrees; (b) said co-crystal is a modafmikcitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 12.41,13.29, and 14.61 degrees; (c) said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 17.29,17.97, and 21.37 degrees; (d) said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.29 and 17.29 degrees; 198Q889_1.DOC 170 / 2 $ tyy 545133 said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises a peak at 5.29 degrees; said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises a peak at 7.29 degrees; or said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises a peak at 12.41 degrees.

The co-crystal according to claim 1, wherein: the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (i) said co-ctystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.45,9.93, and 17.99 degrees; (ii) said co-crystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises peaks at 19.95,21.95, and 25.07 degrees; (iii) said co-crystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.45, 17.99, and 21.35 degrees; (iv) said co-crystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.45 and 9.93 degrees; (v) said co-crystal is a modafiniksuccinic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 17.99 and 21.95 degrees; (vi) said co-crystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.93 and 19.95 degrees; (vii) said co-crystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises a peak at 5.45 degrees; (viii) said co-crystal is a modafiniksuccinic acid co-ciystal and said X-ray diffraction pattern comprises a peak at 9.93 degrees; or (ix) said co-crystal is a modafiniksuccinic acid co-ctystal and said X-ray diffraction pattern comprises a peak at 17.99 degrees; or the co-ciystal is characterized by a DSC thermogram, wherein said co-crystal is a modafiniksuccinic acid co-crystal and said DSC thermogram comprises an endothermic transition at about 149 degrees C. .l.DOC 171 545133

8. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (a) said co-crystal is a modaflnilrDL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.75, 9.53, and 15.83 degrees; (b) said co-crystal is a modafinil:DL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 17.61, 20.25, and 22.55 degrees; (c) said co-crystal is a modafinil:DL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 10.07, 17.61, and 21.53 degrees; (d) said co-crystal is a modafinil:DL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.75 and 15.83 degrees; (e) said co-crystal is a modafinil:DL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.53 and 17.61 degrees; (f) said co-crystal is a modafinil:DL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 21.53 and 22.55 degrees; (g) said co-crystal is a modafmilrDL-tartaric acid co-ciystal and said X-ray diffraction pattern comprises a peak at 4.75 degrees; (h) said co-crystai is a modafinihDL-tartaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.53 degrees; or (i) said co-crystal is a modafmil:DL-tartaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 15.83 degrees.

9. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta-angles, wherein: (a) said co-crystal is a modafinil:fumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.45, 9.95, and 18.03 degrees; (b) said co-crystal is a modafinilrfumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 15.93,18.81, and 21.95 degrees; (c) said co-ciystal is a modafinil: fumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.95,19.93, and 23.09 degrees; (d) said co-crystal is a modafinil:fumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.45 and 9.95 degrees; (e) said co-crystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.45 and 18.03 degrees; 1980889_1.DOC 1?2 / 2 $ ft P- _ 545133 (0 said co-crystal is a modafinikfumaric acid co-eiystal and said X-ray diffraction pattern comprises peaks at 15.93 and 21.95 degrees; (g) said co-crystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 5.45 degrees; (h) said co-crystal is a modafinikfumaric acid co-crystai and said X-ray diffraction pattern comprises a peak at 9.95 degrees; or (i) said co-crystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 18.03 degrees.

10. The co-crystal according to claim 9, wherein the co-crystal is modafinikfumaric acid Form I.

11. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2- theta-angles wherein: (a) said co-crystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 6.47, 8.57, and 9.99 degrees; (b) said co-ciystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 13.89,14.53, and 20.79 degrees; (c) said co-crystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 16.45, 18.39, and 20.05 degrees; (d) said co-crystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 6.47 and 20.79 degrees; (e) said co-crystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.99 and 14.53 degrees; (f) said co-crystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 13.89 and 20.05 degrees; (g) said co-crystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 6.47 degrees; (h) said co-ctystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 13.89 degrees; or (i) ' said co-crystal is a modafinikfumaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 20.79 degrees. 3980889_t.DOC 173 545133

12. The co-crystal according to claim 11, wherein the co-crystal is modafmil: fumaric acid Form II.

13. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (a) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises peaks at 6.96, 12.92, and 14.76 degrees; (b) said co-ciystal is a modafinilrgentisic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 14.76, 18.26, and 20.10 degrees; (c) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises peaks at 6.96,17.40, and 20.94 degrees; (d) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises peaks at 6.96 and 14.76 degrees; (e) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises peaks at 12.92 and 17.40 degrees; (f) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises peaks at 6.96 and 18.26 degrees; (g) said co-ctystal is a modafinilrgentisic acid co-ctystal and said X-ray diffraction pattern comprises a peak at 6.96 degrees; (h) said co-crystal is a modafinilrgentisic acid co-crystal Mid said X-ray diffraction pattern comprises a peak at 14.76 degrees; or (i) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises a peak at 18.26 degrees.

14. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (a) said co-crystal is a modafinilroxalic acid co-ctystal aid said X-ray diffraction pattern comprises peaks at 5.98,17.54, and 19.68 degrees; (b) said co-crystal is a modafinilroxalic acid co-ctystal and said X-ray diffraction pattern comprises peaks at 13.68,14.80, and 21.12 degrees; (c) said co-crystal is a modafinilroxalic acid co-ctystal and said X-ray diffraction pattern comprises peaks at 17.54,19.68, and 21.86 degrees; 1980889_1.DOC 174 INTELLECTUAL PROPERTY OFFICE OF N.Z. 2 6 may 2009 received 545133 (d) said co-ciystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.98 and 19.68 degrees; (e) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises peaks at 13.68 and 14.80 degrees; (f) said co-crystal is a modafinilroxalic acid co-crystal and said X-r?y diffraction pattern comprises peaks at 5.98 and 17.54 degrees; (g) said co-crystal is a modafinilroxalic acid co-ciystal and said X-ray diffraction partem comprises a peak at 5.98 degrees; (h) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises a peak at 19.68 degrees; or (i) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises a peak at 17.54 degrees.

15. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2- theta angles, wherein: (a) said co-crystal is a modafmil: l-hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.72,7.10, and 14.16 degrees; (b) said co-crystal is a modafinil: 1 -hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 11.48, 15.66, and 20.26 degrees; (c) said co-crystal is a modafinil: 1 -hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.72, 7.10, and 20.26 degrees; (d) said co-crystal is a modafini 1:1 -hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.72 and 7.10 degrees; (e) said co-crystal is a modafinil: l-hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 14.16 and 20.26 degrees; (f) said co-crystal is a modafinil: 1 -hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.72 and 14.16 degrees; (g) said co-crystal is a modafinil: l-hydroxy-2-naphthoic acid co-ctystal and said X-ray diffraction pattern comprises a peak at 5.72 degrees; 198Q889_1.DOC 175 INTEIXECTUAL PROPERTY OFRBE OF N.Z. 2 6 may 2009 545133 (h) said co-crystal is a modafmil: l-hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises a peak at 7.10 degrees; or (i) said co-crystal is a modafinil: l-hydroxy-2-naphthoic acid co-ciystal and said X-ray diffraction pattern comprises a peak at 14.16 degrees.

16. The co-crystal according to claim 1, wherein: (a) the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (i) said co-crystal is a modafinil-.malonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.04,9.26, and 16.73 degrees; (ii) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 18.23, 19.37, and 22.74 degrees; (iii) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.04, 16.73, and 19.37 degrees; (iv) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.04 and 9.26 degrees; (v) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 16.73 and 19.37 degrees; (vi) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.26 and 18.23 degrees; (vii) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises a peak at 5.04 degrees; (viii) said co-crystal is a modafinikmalonic acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.26 degrees; or (ix) said co-crystal is a modafinikmalonic acid co-ciystal and said X-ray diffraction pattern comprises a peak at 19.37 degrees; or (b) the co-ciystal is characterized by a DSC thermogram, wherein said co-ciystal is a modafinikmalonic acid co-crystal and said DSC thermogram comprises an endothermic transition at about 115 degrees C.

17. The co-crystal according to claim 16, wherein the modafinil is R-(-> modafinil. 1980889_1.DOC 176 INTELLECTUAL PROPERTY OFFICE OF N.Z. 2 6 may 2009 545133

18. The co-crystal according to claim 1, wherein: (a) the co-ciystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (i) said co-crystal is a modafinil :succinic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.36, 9.83, and 17.88 degrees; (ii) said co-ciystal is a modafiniksuccinic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 15.80,19.87, and 21.85 degrees; (iii) said co-crystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.36, 9.83, and 21.85 degrees; (iv) said co-ciystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.36 and 9.83 degrees; (v) said co-crystai is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises peaks at 17.88 and 19.87 degrees; (vi) said co-crystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.83 and 15.80 degrees; (vii) said co-ciystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises a peak at 5.36 degrees; (viii) said co-ciystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.83 degrees; or (ix) said co-crystal is a modafiniksuccinic acid co-crystal and said X-ray diffraction pattern comprises a peak at 17.88 degrees; or (b) the co-crystal is characterized by a DSC thermogram, wherein said co- crystal is a modafiniksuccinic acid co-crystal and said DSC thennogram comprises an endothermic transition at about 145 degrees C.

19. The co-crystal according to claim 18, wherein the modafinil is R-(-)-modafinil. 1980S89_1.DOC 177 545133

20. The co-crystal according to claim 1, wherein: (a) the co-ciystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (i) said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.18,7.23, and 9.23 degrees; (ii) said co-ctystal is a modafinihcitric acid co-ciystal and said X-ray diffraction pattern comprises peaks at 12.32,13.23, and 17.25 degrees; (iii) said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.23, 17.92, and 21.30 degrees; (iv) said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.18 and 9.23 degrees; (v) said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 7.23 and 13.23 degrees; (vi) said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 17.25 and 17.92 degrees; (vii) said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises a peak at 5.18 degrees; (viii) said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises a peak at 7.23 degrees; or (ix) said co-crystal is a modafinilxitric acid co-ctystal and said X-ray diffraction pattern comprises a peak at 9.23 degrees; or (b) the co-crystal is characterized by a DSC thennogram, wherein said co- ciystal is a modafinilxitric acid co-crystal and said DSC thermogram comprises an endothermic transition at about 89 degrees C.

21. The co-crystal according to claim 20, wherein the modafinil is R-(-)- modafinil. N.z. 198Q889_1.DOC 178 2 6 MAY 2009 rec Pll/p- 545133

22. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2- theta-angles, wherein: (a) said co-ciystal is a modafinil:l-hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.27, 8.85, and 10.60 degrees; (b) said co-crystal is a modafinil:l-hydroxy-2-naphthoic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 10.60, 14.47, and 21.20 degrees; (c) said co-crystal is a modafinil: 1 -hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.27,14.47, and 23.03 degrees; (d) said co-crystal is a modafinil: l-hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.27 and 8.85 degrees; (e) said co-crystal is a modafmil: 1 -hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 10.60 and 23.03 (f) said co-crystal is a modafinil: l-hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises peaks at 14.47 and 21.20 (g) said co-ciystal is a modafmil: l-hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises a peak at 5.27 degrees; (h) said co-crystal is a modafinil: l-hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises a peak at 8.85 degrees; or (i) said co-ciystal is a modafinil: l-hydroxy-2-naphthoic acid co-crystal and said X-ray diffraction pattern comprises a peak at 14.47 degrees.

23. The co-crystal according to claim 22, wherein the modafinil is R-(-)-modafinil.

24. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (a) said co-crystal is a modafmil:DL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.67,15.41, and 19.46 degrees; degrees; degrees; 1980889_1.DOC 179 545133 (b) said co-crystal is a modafinilrDL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 17.97,19.46, and 22.91 degrees; (c) said co-crystal is a modafinilrDL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.67,22.91, and 24.63 degrees; (d) said co-crystal is a modafinilrDL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.67 and 19.46 degrees; (e) said co-crystal is a modafinilrDL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 17.97 and 22.91 degrees; (f) said co-ciystal is a modafinilrDL-tartaric acid co-ciystal and said X-ray diffraction pattern comprises peaks at 15.41 and 24.63 degrees; (g) said co-ciystal is a modafinilrDL-tartaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 4.67 degrees; (h) said co-ciystal is a modafinilrDL-tartaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 19.46 degrees; or (i) said co-crystal is a modafinilrDL-tartaric acid co-ciystal and said X-ray diffraction pattern comprises a peak at 22.91 degrees.

25. The co-crystal according to claim 24, wherein the modafinil is R-(-)-modafinil.

26. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (a) said co-ciystal is a modafmilrorotic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 9.77, 17.85, and 20.52 degrees; (b) said co-crystal is a modafmilrorotic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 17.85,24.03, and 26.80 degrees; (c) said co-ciystal is a modafmilrorotic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 9.77,20.52, and 24.03 degrees; (d) said co-crystal is a modafmilrorotic acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.77 and 17.85 degrees; (e) said co-ciystal is a modafinilrorotic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 17.85 and 24.03 degrees; (f) said co-crystal is a modafinilrorotic acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.77 and 26.80 degrees; 1980889_1.DOC 180 RECEIVED at IPONZ on 13 November 2009 545133 (g) said co-crystal is a modafinilrorotic acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.77 degrees; (h) said co-crystal is a modafinilrorotic acid co-ciystal and said X-ray diffraction pattern comprises a peak at 17.85 degrees; or (i) said co-crystal is a modafinilrorotic acid co-ciystal and said X-ray diffraction pattern comprises a peak at 24.03 degrees.

27. The co-crystal according to claim 26, wherein the modafinil is R-(-)-modaflnil.

28. The co-crystal of claim 1, wherein the modafinil is R-(-)-modafinil.

29. The co-crystal of claim 1, wherein the modafinil is S-(+)-modafinil.

30. A use of a co-crystal according to any one of claims 1 to 29 in the manufacture of a medicament for treating a subject suffering from excessive daytime sleepiness associated with narcolepsy, multiple sclerosis related fatigue, infertility, eating disorders, attention deficit hyperactivity disorder (ADHD), Parkinson's disease, incontinence, sleep apnea, or myopathies.

31. The use according to claim 30, wherein the subject is a human subject.

32. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (a) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises peaks at 7.07,9.07, and 12.31 degrees; (b) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.07,18.39, and 21.27 degrees; (c) said co-crystal is a modafinilrgentisic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 17.63, 23.57, and 26.93 degrees; (d) said co-ciystal is a modafinilrgentisic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 9.07 and 16.03 degrees; (e) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises peaks at 7.51 and 21.27 degrees; 7 1980889_1.DOC 181 545133 (f) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises peaks at 7.07 and 7.51 degrees; (g) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.07 degrees; (h) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises a peak at 7.07 degrees; (i) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises a peak at 16.03 degrees; (j) said co-crystal is a modafinilrgentisic acid co-crystal and said X-ray diffraction pattern comprises peaks at 7.07,9.07,16.03,18.39,21.27, and 23.57 degrees; or

33. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2- theta-angles, wherein: (a) said co-crystal is a modafinilrglutaric acid co-ciystal and said X-ray diffraction pattern comprises peaks at 9.78, 18.92, and 21.36 degrees; (b) said co-crystal is a modafinilrglutaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 20.50,22.25, and 23.87 degrees; (c) said co-crystal is a modafinilrglutaric acid co-ciystal and said X-ray diffraction pattern comprises peaks at 8.67, 19.74, and 27.16 degrees; (d) said co-crystal is a modafinilrglutaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 8.67 and 18.92 degrees; (e) said co-crystal is a modafinilrglutaric acid co-ciystal and said X-ray diffraction pattern comprises peaks at 9.78 and 20.50 degrees; (f) said co-crystal is a modafinilrglutaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 21.36 and 23.87 degrees; (g) said co-crystal is a modafinilrglutaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 23.87 degrees; (h) said co-crystal is a modafinilrglutaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 8.67 degrees; (i) said co-crystal is a modafinilrglutaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.78 degrees; (j) said co-crystal is a modafinilrglutaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 8.67, 9.78,18.92,20.50, and 23.87 degrees; or 1980889_1.DOC jg2 / Op HAY2009 I 545133 (k) said co-crystal is a modafinilrglutaric acid co-ciystal and said X-ray diffraction pattern comprises peaks at 18.92,20.50,21.36,22.25, and 23.87 degrees.

34. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2- theta-angles, wherein: (a) said co-crystal is a modafinihcitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 7.06,9.10, and 17.95 degrees; (b) said co-crystal is a modafinilxitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 12.43, 13.18, and 20.85 degrees; (c) said co-crystal is a modafinihcitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.23,7.06, and 9.10 degrees; (d) said co-crystal is a modafinihcitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.23 and 12.43 degrees; (e) said co-ciystal is a modafinilxitric acid co-ciystal and said X-ray diffraction pattern comprises peaks at 9.10 and 17.95 degrees; (f) said co-crystal is a modafinihcitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.10 and 12.43 degrees; (g) said co-crystal is a modafinihcitric acid co-crystal and said X-ray diffraction pattern comprises a peak at 7.06 degrees; (h) said co-crystal is a modafinihcitric acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.10 degrees; (i) said co-crystal is a modafinihcitric acid co-crystal and said X-ray diffraction pattern comprises a peak at 17.95 degrees; (j) said co-crystal is a modafinihcitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 7.06,12.43,13.18,17.95, and 20.85 degrees; or (k) said co-crystal is a modafinihcitric acid co-crystal and said X-ray diffraction pattern comprises peaks at 7.06, 9.10,17.95,21.39, and 22.96 degrees.

35. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta angles, wherein: (a) said co-crystal is a modafinihL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.56,10.33, an^LI7.29 degrees; 1980889_1.DOC 183 545133 (b) said co-crystal is a modafinihL-iartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 17.29, 19.91, and 21.13 degrees; (c) said co-crystal is a modafinikL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.56, 14.45, and 19.91 degrees; (d) said co-crystal is a modafinikL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.56 and 10.33 degrees; (e) said co-crystal is a modafinikL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 17.29 and 19.91 degrees; (f) said co-crystal is a modafinikL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 19.91 and 21.13 degrees; (g) said co-crystal is a modafinikL-tartaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 4.56 degrees; (h) said co-crystal is a modafinikL-tartaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 10.33 degrees; (i) said co-crystal is a modafinikL-tartaric acid co-crystal and said X-ray diffraction pattern comprises a peak at 19.91 degrees; or (j) said co-crystal is a modafinikL-tartaric acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.56, 10.33, 17.29, 19.91, and 21.13 degrees.

36. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2- theta-angles, wherein: (a) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.99,14.73, and 17.38 degrees; (b) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises peaks at 17.38,18.64, and 28.85 degrees; (c) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises peaks at 14.73, 18.64, and 25.66 degrees; (d) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.99 and 14.73 degrees; (e) said co-crystal is a modafinilroxalic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 17.38 and 18.64 degrees; (f) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.99 and 28.85 degrees; 1980889_1.DOC 184 545133 (g) said co-crystal is a modafinil :oxalic acid co-crystal and said X-ray diffraction pattern comprises a peak at 5.99 degrees; (h) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises a peak at 14.73 degrees; (i) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises a peak at 28.85 degrees; or (j) said co-crystal is a modafinilroxalic acid co-crystal and said X-ray diffraction pattern comprises peaks at 5.99, 14.73,17.38, 18.64, and 28.85 degrees.

37. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2- theta-angles, wherein: (a) said co-crystal is a modafinilrpalmitic acid co-crystal and said X-ray diffraction pattern comprises peaks at 3.80,6.55, and 7.66 degrees; (b) said co-ciystal is a modafinilrpalmitic acid co-crystal and said X-ray diffraction pattern comprises peaks at 10.24, 19.48, and 21.09 degrees; (c) said co-crystal is a modafinilrpalmitic acid co-crystal and said X-ray diffraction pattern comprises peaks at 3.80, 19.48, and 23.99 degrees; (d) said co-crystal is a modafinilrpalmitic acid co-crystal and said X-ray diffraction pattern comprises peaks at 3.80 and 6.55 degrees; (e) said co-crystal is a modafinilrpalmitic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 6.55 and 7.66 degrees; (f) said co-crystal is a modafinilrpalmitic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 19.48 and 23.99 degrees; (g) said co-crystal is a modafinilrpalmitic acid co-crystal and said X-ray diffraction pattern comprises a peak at 3.80 degrees; (h) said co-crystal is a modafinilrpalmitic acid co-ciystal and said X-ray diffraction pattern comprises a peak at 6.55 degrees; (i) said co-ciystal is a modafinilrpalmitic acid co-ciystal and said X-ray diffraction pattern comprises a peak at 7.66 degrees; (j) said co-crystal is a modafinilrpalmitic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 3.80, 7.66, 10.24, and 19.48 degrees; or (k) said co-crystal is a modafinilrpalmitic acid co-crystal and said X-ray diffraction pattern comprises peaks at 3.80,6.55, 7.66,10.24, 19.48, and 198Q889_1.DOC 23.99 degrees. 185 545133

38. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta-angles, wherein: (a) said co-ciystal is a modafinihL-proline co-crystal and said X-ray diffraction pattern comprises peaks at 6.52, 8.53, and 10.25 degrees; (b) said co-crystal is a madafinil:L-proline co-crystal and said X-ray diffraction pattern comprises peaks at 19.06, 22.75, and 25.08 degrees; (c) said co-crystal is a modafinil:L-proIine co-crystal and said X-ray diffraction pattern comprises peaks at 6.52, 10.25, and 19.06 degrees; (d) said co-crystal is a modafinihL-proline co-crystal and said X-ray diffraction pattern comprises peaks at 6.52 and 8.53 degrees; (e) said co-crystal is a modafinihL-proIine co-crystal and said X-ray diffraction pattern comprises peaks at 6.52 and 10.25 degrees; (f) said co-crystal is a modafinil:L-proline co-ciystal and said X-ray diffraction pattern comprises peaks at 19.06 and 22.29 degrees; (g) said co-ciystal is a modafinihL-proline co-crystal and said X-ray diffraction pattern comprises a peak at 6.52 degrees; (h) said co-crystal is a modafinihL-proline co-ciystal and said X-ray diffraction pattern comprises a peak at 8.53 degrees; (i) said co-crystal is a modafinihL-proline co-crystal and said X-ray diffraction pattern comprises a peak at 19.06 degrees; (j) said co-crystal is a modafinihL-proline co-crystal and said X-ray diffraction pattern comprises peaks at 6.52, 10.25, 19.06, 22.75, and 25.08 degrees; or (k) said co-crystal is a modafinihL-proline co-crystal and said X-ray diffraction pattern comprises peaks at 8.53, 10.25,19.06, 22.29, and 25.08 degrees.

39. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta-angles, wherein: (a) said co-crystal is a modafiniksalicylic acid co-crystal and said X-ray diffraction pattern comprises peaks at 8.92, 10.85, and 17.07 degrees; 1980889_1.DOC 186 545133 (b) said co-crystal is a modafinihsalicylic acid co-crystal and said X-ray diffraction pattern comprises peaks at 12.18, 21.24, and 23.32 degrees; (c) said co-crystal is a modafinihsalicylic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 8.92, 18.81, and 25.22 degrees; (d) said co-ciystal is a modafinihsalicylic acid co-crystal and said X-ray diffraction pattern comprises peaks at 8.92 and 10.85 degrees; (e) said co-crystal is a modafinihsalicylic acid co-crystal and said X-ray diffraction pattern comprises peaks at 17.07 and 21.24 degrees; (f) said co-crystal is a modafinihsalicylic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 23.32 and 25.22 degrees; (g) said co-crystal is a modafinihsalicylic acid co-crystal and said X-ray diffraction pattern comprises a peak at 8.92 degrees; (h) said co-crystal is a modafinihsalicylic acid co-crystal and said X-ray diffraction pattern comprises a peak at 10.85 degrees; (i) said co-ciystal is a modafinihsalicylic acid co-ciystal and said X-ray diffraction pattern comprises a peak at 21.24 degrees; (j) said co-crystal is a modafinihsalicylic acid co-crystal and said X-ray diffraction pattern comprises peaks at 8.92, 12.18,17.07, 21.24, and 23.32 degrees; or (k) said co-crystal is a modafinihsalicylic acid co-crystal and said X-ray diffraction pattern comprises peaks at 10.85, 14.04, 21.24, and 23.32 degrees.

40. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2-theta-angles, wherein: (a) said co-crystal is a modafiniklauric acid co-crystal and said X-ray diffraction pattern comprises peaks at 3.12,6.55, and 10.24 degrees; (b) said co-crystal is a modafiniklauric acid co-crystal and said X-ray diffraction pattern comprises peaks at 6.55,13.97, and 17.62 degrees; (c) said co-ciystal is a modafiniklauric acid co-crystal and said X-ray diffraction pattern comprises peaks at 3.12,21.38, and 23.81 degrees; (d) said co-crystal is a modafiniklauric acid co-crystal and said X-ray diffraction pattern comprises peaks at 3.12 and 6.55 degrees; (e) said co-crystal is a modafinihlauric acid co-crystal and said X-ray diffraction pattern comprises peaks at 10.24 and 17. 198088<L1 .DOC 187 545133 (f) said co-crystal is a modafinil:lauric acid co-crystal and said X-ray diffraction pattern comprises peaks at 21.38 and 23.81 degrees; (g) said co-crystal is a modafmil: lauric acid co-crystal and said X-ray diffraction pattern comprises a peak at 3.12 degrees; (h) said co-crystal is a modafinil: lauric acid co-crystal and said X-ray diffraction pattern comprises a peak at 6.55 degrees; (i) said co-crystal is a modafinil: lauric acid co-crystal and said X-ray diffraction pattern comprises a peak at 21.38 degrees; (j) said co-crystal is a modafinil: lauric acid co-crystal and said X-ray diffraction pattern comprises peaks at 3.12,10.24,16.40, 19.02, and 21.38 degrees; or (k) said co-crystal is a modafmihlauric acid co-ciystal and said X-ray diffraction pattern comprises peaks at 3.12, 6.55,10.24,21.38, and 23.81 degrees.

41. The co-crystal according to claim 1, wherein the co-crystal is characterized by a powder X-ray diffraction pattern comprising peaks expressed in terms of 2- theta-angles, wherein: (a) said co-crystal is a modafinil:L-malic acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.62,9.32, and 19.30 degrees; (b) said co-crystal is a modafinil:L-malic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 9.32, 10.32, and 21.48 degrees; (c) said co-ciystal is a modafinil:L-malic acid co-crystal and said X-ray diffraction pattern comprises peaks at 19.30,21.48, and 24.26 degrees; (d) said co-crystal is a modafinil :L-malic acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.62 and 9.32 degrees; (e) said co-crystal is a modafmil:L-malic acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.32 and 10.32 degrees; (0 said co-ciystal is a modafinil:L-malic acid co-ciystal and said X-ray diffraction pattern comprises peaks at 19.30 and 21.48 degrees; (g) said co-ciystal is a modafinil:L-malic acid co-ciystal and said X-ray diffraction pattern comprises a peak at 4.62 degrees; (h) said co-ciystai is a modafinil:L-malic acid co-crystal and said X-ray diffraction pattern comprises a peak at 9.32 degrees; (i) said co-ciystal is a modafinil:L-malic acid co-ciystal and said X-ray diffraction pattern comprises a peak at 19.30 degrees; t980889_l.DOC Jgg RECEIVED at IPONZ on 13 November 2009 545133 (j) said co-crystal is a modafinihL-malic acid co-crystal and said X-ray diffraction pattern comprises peaks at 4.62, 15.83, 17.38, 19.30, and 21,48 degrees; or (k) said co-crystal is a modafinihL-malic acid co-crystal and said X-ray diffraction pattern comprises peaks at 9.32, 10.32, 17.38, 19.30,21.48, and 2426 degrees.

42, A co-crystal according to claim 1, substantially as herein described with reference to any example thereof.

43. A use according to claim 30, substantially as herein described with reference to any example thereof. 1980889_1.DOC 189