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EP1181296A1 - Composes anti-inflammatoires inhibant l'adhesion cellulaire - Google Patents

Composes anti-inflammatoires inhibant l'adhesion cellulaire

Info

Publication number
EP1181296A1
EP1181296A1 EP99931986A EP99931986A EP1181296A1 EP 1181296 A1 EP1181296 A1 EP 1181296A1 EP 99931986 A EP99931986 A EP 99931986A EP 99931986 A EP99931986 A EP 99931986A EP 1181296 A1 EP1181296 A1 EP 1181296A1
Authority
EP
European Patent Office
Prior art keywords
thieno
pyridine
carboxamide
chlorophenoxy
methyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99931986A
Other languages
German (de)
English (en)
Inventor
David L. Arendsen
Pramila Bhatia
Steven A. Boyd
Kevin R. Condroski
Jennifer C. Freeman
Indrani W. Gunawardana
Kraig Lartey
Catherine M. Mccarty
Nicholas A. Mort
Meena V. Patel
Michael A. Staeger
Andrew O. Stewart
David M. Stout
Gui-Dong Zhu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Abbott Laboratories
Original Assignee
Abbott Laboratories
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Abbott Laboratories filed Critical Abbott Laboratories
Publication of EP1181296A1 publication Critical patent/EP1181296A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/04—Ortho-condensed systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
    • C07D491/02—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains two hetero rings
    • C07D491/04—Ortho-condensed systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D495/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
    • C07D495/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
    • C07D495/04—Ortho-condensed systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D513/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
    • C07D513/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains two hetero rings
    • C07D513/04—Ortho-condensed systems

Definitions

  • the present invention relates to compounds that are useful for treating inflammatory diseases, to pharmaceutical compositions comprising these compounds, and to methods of inhibiting inflammation in a mammal.
  • Inflammation results from a cascade of events that includes vasodilation accompanied by increased vascular permeability and exudation of fluid and plasma proteins. This disruption of vascular integrity precedes or coincides with an infiltration of inflammatory cells.
  • Inflammatory mediators generated at the site ofthe initial lesion serve to recruit inflammatory cells to the site of injury. These mediators (chemokines such as IL-8, MCP-1, MIP-1, and RANTES, complement fragments and lipid mediators) have chemotactic activity for leukocytes and attract the inflammatory cells to the inflamed lesion.
  • chemokines such as IL-8, MCP-1, MIP-1, and RANTES, complement fragments and lipid mediators
  • These chemotactic mediators which cause circulating leukocytes to localize at the site of inflammation require the cells to cross the vascular endothelium at a precise location. This leukocyte recruitment is accomplished by a process called cell adhesion.
  • the first step consists of leukocyte rolling along the vascular endothelial cell lining in the region of inflammation.
  • the rolling step is mediated by an interaction between leukocyte surface oligosaccharides (such as Sialylated Lewis-X antigen (Slex)) and a selectin molecule expressed on the surface ofthe endothelial cell in the region of inflammation.
  • leukocyte surface oligosaccharides such as Sialylated Lewis-X antigen (Slex)
  • a selectin molecule expressed on the surface ofthe endothelial cell in the region of inflammation.
  • the selectin molecule is not normally expressed on the surface of endothelial cells but rather is induced by the action of inflammatory mediators such as TNF- ⁇ and interleukin- 1.
  • Rolling decreases the velocity ofthe circulating leukocyte in the region of inflammation and allows the cells to more firmly adhere to the endothelial cell.
  • the firm adhesion is accomplished by the interaction of integrin molecules that are present on the surface ofthe rolling leukocytes and their counter-receptors-the Ig superfamily molecule- on the surface ofthe endothelial cell.
  • the Ig superfamily molecules or CAMs are either not expressed or are expressed at low levels on normal vascular endothelial cells.
  • the CAM's like the selectins, are induced by the action of inflammatory mediators like TNF-alpha and IL-1.
  • the final event in the adhesion process is the extravasation ofthe leukocyte through the endothelial cell barrier and the migration ofthe leukocyte along the chemotactic gradient to the site of inflammation.
  • This transmigration is mediated by the conversion ofthe leukocyte integrin from a low avidity state to a high avidity state.
  • the adhesion process relies on the induced expression of selectins and CAM's on the surface of vascular endothelial cells to mediate the rolling and firm adhesion of leukocytes to the vascular endothelium.
  • the induced expression of e-selectin and CAM's is mediated by the transcription factor NFkB.
  • NFkB is a family of dimeric transcription factors made from monomers containing the 300 amino acid Rel domain.
  • IkB inhibitor molecule
  • NFkB is found in the cytoplasm complexed with IkB. Activation of NFkB occurs in response to inflammatory mediators such as TNF- ⁇ , IL-1, and lipopolysaccharide. Activation of NFkB requires phosphorylation of IkB followed by ubiquitinylation ofthe IkB molecule and subsequent degradation by proteosomes. Release of NFkB from association with IkB results in translocation ofthe dimer to the nucleus where it can associate with specific DNA sequences.
  • the e-selectin gene and CAM's contain NFkB-recognition sequences upstream from their coding regions.
  • the DNA- bound NFkB acting with other proteins in the transcription complex directs the expression ofthe e-selectin and CAM genes among others controlled by this transcription factor.
  • the present invention discloses compounds that inhibit the expression of e-selectin and ICAM-1 relative to VCAM-1. These compounds are useful for the treatment or prophylaxis of diseases caused by expression of adhesion molecules. These diseases include those in which leukocyte trafficking plays a role, notably acute and chronic inflammatory diseases, autoimmune diseases, tumor metastasis, allograft rejection, and reperfusion injury.
  • E, F, and G are independently selected from
  • N + -O nitrogen, and (3) N + -O", provided that at least one of E, F or G is nitrogen or N + -O", and further provided that at least one of E, F or G is carbon;
  • Y and Z are independently selected from (1) carbon
  • L A is selected from 0) a covalent bond
  • X A is selected from
  • alkyl of one to ten carbons optionally substituted with 1 , or 2 substituents independently selected from aryl and cycloalkyl of three to ten carbons, (iii) -NR 8 R, and
  • alkyl of one to ten carbons optionally substituted with 1 or 2 substituents independently selected from alkoxy of one to ten carbons and -OH,
  • R, is selected from hydrogen, -C(W)R
  • L B is selected from
  • R 15 is selected from hydrogen
  • X B is selected from
  • R, 6 is selected from (i) hydrogen and (ii) -C(W)NR A R B , and
  • R A , R B , and R 13 are previously defined and R 19 is selected from hydrogen, alkyl of one to ten carbons, and
  • R A is previously defined and R 21 is selected from (i) alkyl of one to ten carbons optionally substituted with 1 or 2 substituents selected from aryl and cycloalkyl of three to ten carbons,
  • Rute R 2 , R 3 , R 4 , and R 5 are hydrogen or absent, -L A - is a covalent bond, and -L B - is a covalent bond, then one of X A or X B is other than hydrogen;
  • R Pain R 2 , R 3 , R 4 , and R 5 are absent or independently selected from (1) hydrogen, (2) alkyl of one to six carbons optionally substituted with 1 or 2 substituents independently selected from
  • alkanoyl refers to an alkyl group attached to the parent molecular group through a carbonyl group.
  • alkenyl refers to a monovalent straight or branched chain group of 2-12 carbon atoms containing at least one carbon-carbon double bond derived from an alkene by the removal of one hydrogen atom.
  • alkenylene refers to a divalent straight or branched chain group of 2-10 carbon atoms containing a carbon-carbon double bond derived from an alkene by the removal of two hydrogen atoms.
  • alkoxy refers to an alkyl group attached to the parent molecular group through an oxygen atom.
  • alkoxyalkoxy refers to an alkoxy group attached to the parent molecular group through another alkoxy group.
  • alkoxycarbonyloxy refers to an alkoxy group, as defined herein, appended to the parent molecular moiety through a carbonyloxy group, as defined herein.
  • alkoxycarbonyloxymethylene refers to an alkoxycarbonyloxy group, as defined herein, appended to the parent molecular moiety through a methylene group, as defined herein.
  • alkyl refers to a saturated straight or branched chain group of 1-20 carbon atoms derived from an alkane by the removal of one hydrogen atom.
  • alkylcarbonyl refers to an alkyl group, as defined herein, appended to the parent molecular moiety through a carbonyl group.
  • alkylcarbonyloxy refers to an alkyl group, as defined herein, appended to the parent molecular moiety through a carbonyloxy group, as defined herein.
  • alkylcarbonyloxymethylene refers to an alkylcarbonyloxy group, as defined herein, appended to the parent molecular moiety through a methylene group, as defined herein.
  • alkylene denotes a divalent group derived from a straight or branched chain hydrocarbon of from 1 to 10 carbon atoms. Representative examples of alkylene include, but are not limited to, -CH 2 -, -CH 2 CH 2 -, -CH 2 CH 2 CH 2 -, -CH 2 CH 2 CH 2 CH 2 -, -CH 2 CH(CH 3 )CH 2 -, and the like.
  • amino refers to a-NR 80 R 81 group, where R 80 and R 81 are independently selected from hydrogen and alkyl.
  • aminocarbonyl refers to an amino group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein.
  • aminocarbonyloxy refers to an aminocarbonyl group, as defined herein, appended to the parent molecular moiety through an oxy group, as defined herein.
  • aminocarbonyloxymethylene refers to an aminocarbonyloxy group, as defined herein, appended to the parent molecular moiety through a methylene group, as defined herein.
  • aryl refers to a mono- or bicyclic carbocyclic ring system having one or two aromatic rings. The aryl group can also be fused to a cyclohexane, cyclohexene, cyclopentane or cyclopentene ring. The aryl groups of this invention can be optionally substituted.
  • carbonyl refers to a -C(O)- group.
  • carbonyloxy refers to a carbonyl group as defined herein, appended to the parent molecular moiety through an oxy group, as defined herein.
  • cycloalkyl refers to a monovalent saturated cyclic hydrocarbon group of 3-12 carbons derived from a cycloalkane by the removal of a single hydrogen atom.
  • ethylenedioxy refers to a -O(CH 2 ) 2 O- group wherein the oxygen atoms ofthe ethylenedioxy group are attached to the parent molecular moiety through one carbon atom forming a 5 membered ring or the oxygen atoms ofthe ethylenedioxy group are attached to the parent molecular moiety through two adjacent carbon atoms forming a six membered ring.
  • heterocycle represents a represents a 4-, 5-, 6- or 7-membered ring containing one, two or three heteroatoms independently selected from the group consisting of nitrogen, oxygen and sulfur.
  • the 4- and 5 -membered rings have zero to two double bonds and the 6- and 7-membered rings have zero to three double bonds.
  • heterocycle also includes bicyclic, tricyclic and tetracyclic groups in which any ofthe above heterocyclic rings is fused to one or two rings independently selected from an aryl ring, a cyclohexane ring, a cyclohexene ring, a cyclopentane ring, a cyclopentene ring or another monocyclic heterocyclic ring.
  • Heterocycles include acridinyl, benzimidazolyl, benzofuryl, benzothiazolyl, benzothienyl, benzoxazolyl, biotinyl, cinnolinyl, dihydrofuryl, dihydroindolyl, dihydropyranyl, dihydrothienyl, dithiazolyl, furyl, homopiperidinyl, imidazolidinyl, imidazolinyl, imidazolyl, indolyl, isoquinolyl, isothiazolidinyl, isothiazolyl, isoxazohdinyl, isoxazolyl, morpholinyl, oxadiazolyl, oxazolidinyl, oxazolyl, oxadiazolyl, piperazinyl, piperidinyl, pyranyl, pyrazolidinyl, pyrazinyl, pyrazolyl, pyrazol
  • Heterocyclics also include bridged bicyclic groups where a monocyclic heterocyclic group is bridged by an alkylene group such as
  • Heterocyclics also include compounds ofthe formula
  • heterocycles include 1,3-benzodioxolyl, 1 ,4-benzodioxanyl, and the like.
  • the heterocycle groups of this invention can be optionally substituted.
  • oxy refers to -O-.
  • methylene refers to a -CH 2 - group.
  • perfluoroalkyl refers to an alkyl group in which all of the hydrogen atoms have been replaced by fluoride atoms.
  • phenyl refers to a monocyclic carbocyclic ring system having one aromatic ring.
  • the aryl group can also be fused to a cyclohexane or cyclopentane ring.
  • the phenyl groups of this invention can be optionally substituted.
  • prodrugs as used herein represents those prodrugs ofthe compounds ofthe present invention which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of humans and lower animals with undue toxicity, irritation, allergic response, and the like, commensurate with a reasonable benefit/risk ratio, and effective for their intended use, as well as the zwitterionic forms, where possible, ofthe compounds ofthe invention.
  • prodrug represents compounds which are rapidly transformed in vivo to the parent compound ofthe above formula, for example, by hydrolysis in blood. A thorough discussion is provided in T. Higuchi and V. Stella, Pro- drugs as Novel Delivery Systems, Vol. 14 ofthe A.C.S. Symposium Series, and in Edward B. Roche, ed., Bioreversible Carriers in Drug Design, American Pharmaceutical Association and Pergamon Press, 1987, both of which are incorporated herein by reference.
  • spiroalkyl refers to an alkylene group wherein two carbon atoms ofthe alkylene group are attached to one carbon atom ofthe parent molecular group thereby forming a carbocyclic ring of three to eleven carbon atoms.
  • tautomer refers to a proton shift from one atom of a molecule to another atom ofthe same molecule wherein two or more structurally distinct compounds are in equilibrium with each other.
  • thioalkoxy refers to an alkyl group attached to the parent molecular group through a sulfur atom.
  • Stereoisomers include enantiomers and diastereomers, and mixtures of enantiomers or diastereomers are designated (— ).
  • Individual stereoisomers of compounds ofthe present invention can be prepared synthetically from commercially available starting materials which contain asymmetric or chiral centers or by preparation of racemic mixtures followed by resolution well-known to those of ordinary skill in the art. These methods of resolution are exemplified by (1) attachment of a mixture of enantiomers to a chiral auxiliary, separation ofthe resulting mixture of diastereomers by recrystallization or chromatography and liberation ofthe optically pure product from the auxiliary or (2) direct separation ofthe mixture of optical enantiomers on chiral chromatographic columns.
  • Geometric isomers can exist in the compounds ofthe present invention.
  • the present invention contemplates the various geometric isomers and mixtures thereof resulting from the arrangement of substituents around a carbon-carbon double bond or arrangement of substituents around a carbocyclic ring.
  • Substituents around a carbon- carbon double bond are designated as being in the Z or E configuration wherein the term "Z” represents substituents on the same side ofthe carbon-carbon double bond and the term “E” represents substituents on opposite sides ofthe carbon-carbon double bond.
  • cis or trans The arrangement of substituents around a carbocyclic ring are designated as cis or trans wherein the term "cis” represents substituents on the same side ofthe plane ofthe ring and the term “trans” represents substituents on opposite sides ofthe plane ofthe ring.
  • Mixtures of compounds wherein the substituents are disposed on both the same and opposite sides of plane ofthe ring are designated cis/trans.
  • Tautomers can also exist in the compounds ofthe present invention.
  • the present invention contemplates tautomers due to proton shifts from one atom to another atom of the same molecule generating two distinct compounds that are in equilibrium with each other.
  • Compounds ofthe present invention include, but are not limited to methyl 2-[(6-ethylthieno[2,3-d]pyrimidin-4-yl)thio]acetate, 6-ethyl-4-[(4-methylphenyl)thio]thieno[2,3-d]pyrimidine, 6-ethyl-4-(2-pyridinylthio)thieno[2,3-d]pyrimidine, 6-ethyl-4-[(2-methylethyl)thio]thieno[2,3-d]pyrimidine, 6-ethyl-4-[(phenylmethyl)thio]thieno[2,3-d]pyrimidine,
  • the compounds ofthe present invention act as antiinflammatory agents with potencies below 1 ⁇ M and are therefore useful for treating inflammatory diseases.
  • compositions and Methods of Treatment also provides pharmaceutical compositions which comprise compounds ofthe present invention formulated together with one or more non-toxic pharmaceutically acceptable carriers.
  • the pharmaceutical compositions may be specially formulated for oral administration in solid or liquid form, for parenteral injection, or for rectal administration.
  • the pharmaceutical compositions of this invention can be administered to humans and other animals orally, rectally, parenterally , intracisternally, intravaginally, intraperitoneally, topically (as by powders, ointments, or drops), bucally, or as an oral or nasal spray.
  • parenteral administration refers to modes of administration which include intravenous, intramuscular, intraperitoneal, intrasternal, subcutaneous and intraarticular injection and infusion.
  • compositions of this invention for parenteral injection comprise pharmaceutically acceptable sterile aqueous or nonaqueous solutions, dispersions, suspensions or emulsions as well as sterile powders for reconstitution into sterile injectable solutions or dispersions just prior to use.
  • suitable aqueous and nonaqueous carriers, diluents, solvents or vehicles include water, ethanol, polyols (such as glycerol, propylene glycol, polyethylene glycol, and the like), and suitable mixtures thereof, vegetable oils (such as olive oil), and injectable organic esters such as ethyl oleate.
  • Proper fluidity can be maintained, for example, by the use of coating materials such as lecithin, by the maintenance ofthe required particle size in the case of dispersions, and by the use of surfactants.
  • compositions may also contain adjuvants such as preservative, wetting agents, emulsifying agents, and dispersing agents. Prevention ofthe action of microorganisms may be ensured by the inclusion of various antibacterial and antifungal agents, for example, paraben, chlorobutanol, phenol sorbic acid, and the like. It may also be desirable to include isotonic agents such as sugars, sodium chloride, and the like,
  • Prolonged abso ⁇ tion ofthe injectable pharmaceutical form may be brought about by the inclusion of agents which delay abso ⁇ tion such as aluminum monostearate and gelatin.
  • Injectable depot forms are made by forming microencapsule matrices ofthe drug in biodegradable polymers such as polylactide-polyglycolide.
  • the rate of drug release can be controlled.
  • biodegradable polymers include poly(orthoesters) and poly(anhydrides) Depot injectable formulations are also prepared by entrapping the drug in liposomes or microemulsions which are compatible with body tissues.
  • the injectable formulations can be sterilized, for example, by filtration through a bacterial-retaining filter, or by inco ⁇ orating sterilizing agents in the form of sterile solid compositions which can be dissolved or dispersed in sterile water or other sterile inj ectable medium j ust prior to use .
  • Solid dosage forms for oral administration include capsules, tablets, pills, powders, and granules.
  • the active compound is mixed with at least one inert, pharmaceutically acceptable excipient or carrier such as sodium citrate or dicalcium phosphate and/or a) fillers or extenders such as starches, lactose, sucrose, glucose, mannitol, and silicic acid, b) binders such as, for example, carboxymethylcellulose, alginates, gelatin, polyvinylpyrrolidone, sucrose, and acacia, c) humectants such as glycerol, d) disintegrating agents such as agar-agar, calcium carbonate, potato or tapioca starch, alginic acid, certain silicates, and sodium carbonate, e) solution retarding agents such as paraffin, f) abso ⁇ tion accelerators such as quaternary ammonium compounds, g) wetting agents such as, for example, cetyl alcohol and
  • the dosage form may also comprise buffering agents.
  • Solid compositions of a similar type may also be employed as fillers in soft and hard-filled gelatin capsules using such excipients as lactose or milk sugar as well as high molecular weight polyethylene glycols and the like.
  • the solid dosage forms of tablets, dragees, capsules, pills, and granules can be prepared with coatings and shells such as enteric coatings and other coatings well known in the pharmaceutical formulating art. They may optionally contain opacifying agents and can also be of a composition that they release the active ingredient(s) only, or preferentially, in a certain part ofthe intestinal tract, optionally, in a delayed manner.
  • coatings and shells such as enteric coatings and other coatings well known in the pharmaceutical formulating art. They may optionally contain opacifying agents and can also be of a composition that they release the active ingredient(s) only, or preferentially, in a certain part ofthe intestinal tract, optionally, in a delayed manner.
  • embedding compositions which can be used include polymeric substances and waxes.
  • the active compounds can also be in micro-encapsulated form, if appropriate, with one or more ofthe above-mentioned excipients.
  • Liquid dosage forms for oral administration include pharmaceutically acceptable emulsions, solutions, suspensions, syrups and elixirs.
  • the liquid dosage forms may contain inert diluents commonly used in the art such as, for example, water or other solvents, solubilizing agents and emulsifiers such as ethyl alcohol, isopropyl alcohol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butylene glycol, dimethyl formamide, oils (in particular, cottonseed, groundnut, corn, germ, olive, castor, and sesame oils), glycerol, tetrahydrofurfuryl alcohol, polyethylene glycols and fatty acid esters of sorbitan, and mixtures thereof.
  • the oral compositions can also include adjuvants such as wetting agents, emulsifying and suspending
  • Suspensions in addition to the active compounds, may contain suspending agents as, for example, ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar-agar, and tragacanth, and mixtures thereof.
  • suspending agents as, for example, ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar-agar, and tragacanth, and mixtures thereof.
  • compositions for rectal or vaginal administration are preferably suppositories which can be prepared by mixing the compounds of this invention with suitable non- irritating excipients or carriers such as cocoa butter, polyethylene glycol or a suppository wax which are solid at room temperature but liquid at body temperature and therefore melt in the rectum or vaginal cavity and release the active compound.
  • suitable non- irritating excipients or carriers such as cocoa butter, polyethylene glycol or a suppository wax which are solid at room temperature but liquid at body temperature and therefore melt in the rectum or vaginal cavity and release the active compound.
  • Liposomes are generally derived from phospholipids or other lipid substances. Liposomes are formed by mono- or multi-lamellar hydrated liquid crystals that are dispersed in an aqueous medium. Any non-toxic, physiologically acceptable and metabolizable lipid capable of forming liposomes can be used.
  • the present compositions in liposome form can contain, in addition to a compound ofthe present invention, stabilizers, preservatives, excipients, and the like.
  • the preferred lipids are the phospholipids and the phosphatidyl cholines (lecithins), both natural and synthetic. Methods to form liposomes are known in the art. See, for example, Prescott, Ed., Methods in Cell Biology. Volume XIV, Academic Press, New York, N.Y. (1976), p. 33 et seq.
  • the compounds ofthe present invention may be used in the form of pharmaceutically acceptable salts derived from inorganic or organic acids.
  • “pharmaceutically acceptable salt” is meant those salts which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response and the like and are commensurate with a reasonable benefit/risk ratio.
  • Pharmaceutically acceptable salts are well-known in the art. For example, S. M. Berge, et al. describe pharmaceutically acceptable salts in detail in J. Pharmaceutical Sciences, 1977, 66: 1 et seq.
  • the salts may be prepared in situ during the final isolation and purification ofthe compounds ofthe invention or separately by reacting a free base function with a suitable acid.
  • Representative acid addition salts include, but are not limited to acetate, adipate, alginate, citrate, aspartate, benzoate, benzenesulfonate, bisulfate, butyrate, camphorate, camphorsufonate, digluconate, glycerophosphate, hemisulfate, heptanoate, hexanoate, fumarate, hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethansulfonate (isethionate), lactate, maleate, methanesulfonate, nicotinate, 2-naphthalenesulfonate, oxalate, pamoate, pectinate, persulfate, 3-phenylpropionate, pi crate, pivalate, propionate, succinate, tartrate, thiocyanate, phosphate, glutamate, bicarbonate, p-toluenesulfonate and undecano
  • the basic nitrogen-containing groups can be quaternized with such agents as lower alkyl halides such as methyl, ethyl, propyl, and butyl chlorides, bromides and iodides; dialkyl sulfates like dimethyl, diethyl, dibutyl and diamyl sulfates; long chain halides such as decyl, lauryl, myristyl and stearyl chlorides, bromides and iodides; arylalkyl halides like benzyl and phenethyl bromides and others. Water or oil-soluble or dispersible products are thereby obtained.
  • lower alkyl halides such as methyl, ethyl, propyl, and butyl chlorides, bromides and iodides
  • dialkyl sulfates like dimethyl, diethyl, dibutyl and diamyl sulfates
  • long chain halides such as decyl
  • acids which may be employed to form pharmaceutically acceptable acid addition salts include such inorganic acids as hydrochloric acid, hydrobromic acid, sulphuric acid and phosphoric acid and such organic acids as oxalic acid, maleic acid, succinic acid and citric acid.
  • Basic addition salts can be prepared in situ during the final isolation and purification of compounds of this invention by reacting a carboxylic acid-containing moiety with a suitable base such as the hydroxide, carbonate or bicarbonate of a pharmaceutically acceptable metal cation or with ammonia or an organic primary, secondary or tertiary amine.
  • Pharmaceutically acceptable salts include, but are not limited to, cations based on alkali metals or alkaline earth metals such as lithium, sodium, potassium, calcium, magnesium and aluminum salts and the like and nontoxic quaternary ammonia and amine cations including ammonium, tetramethylammonium, tetraethylammonium, methylamine, dimethylamine, trimethylamine, triethylamine, diethylamine, ethylamine and the like.
  • Other representative organic amines useful for the formation of base addition salts include ethylenediamine, ethanolamine, diethanolamine, piperidine, piperazine and the like.
  • Preferred salts ofthe compounds ofthe invention include phosphate, tris and acetate.
  • Dosage forms for topical administration of a compound of this invention include powders, sprays, ointments and inhalants.
  • the active compound is mixed under sterile conditions with a pharmaceutically acceptable carrier and any needed preservatives, buffers, or propellants which may be required.
  • Opthalmic formulations, eye ointments, powders and solutions are also contemplated as being within the scope of this invention.
  • Actual dosage levels of active ingredients in the pharmaceutical compositions of this invention may be varied so as to obtain an amount ofthe active compound(s) that is effective to achieve the desired therapeutic response for a particular patient, compositions, and mode of administration.
  • the selected dosage level will depend upon the activity of the particular compound, the route of administration, the severity ofthe condition being treated, and the condition and prior medical history ofthe patient being treated. However, it is within the skill ofthe art to start doses ofthe compound at levels lower than required for to achieve the desired therapeutic effect and to gradually increase the dosage until the desired effect is achieved.
  • dosage levels of about 1 to about 50, more preferably of about 5 to about 20 mg of active compound per kilogram of body weight per day are administered orally to a mammalian patient.
  • the effective daily dose may be divided into multiple doses for pu ⁇ oses of administration, e.g. two to four separate doses per day.
  • Scheme 1 shows the preparation of thieno[2,3-d]pyrimidines from esters of general formula 1 by published procedures. 4-Chlorothieno[2,3-d]pyrimidines of general formula 3 were substituted with thiols to provide 4-thioethers of general formula 4 or substituted with amines to provide 4-aminothieno[2,3-d]pyrimidines of general formula 5.
  • Scheme 2 shows the preparation of thieno[2,3-d]pyrimidines from esters of general formula 1 by published procedures. 4-Chlorothieno[2,3-d]pyrimidines of general formula 3 were substituted with thiols to provide 4-thioethers of general formula 4 or substituted with amines to provide 4-aminothieno[2,3-d]pyrimidines of general formula 5.
  • Scheme 2 shows the preparation of 2-carboxy-substituted thieno[2,3- d]pyrimidines.
  • Pyrimidinones of general formula 1 weres reacted with phosphoryl chloride to produce 4-chloro pyrimidines of general formula 6, which were then substituted with thiols to provide thioethers of general formula 7.
  • Scheme 3 shows the preparation of thieno[3,2-d]pyrimidines derived from chloropyrimidines of general formula 8. Substitution ofthe chlorides with thiols provided thioethers of general formula 9, and substitution ofthe chlorides with amines provided aminopyrimidines of general formula 10.
  • Scheme 5 shows the preparation of 6-alkyl substituted thieno[2,3-d]pyrimidines with alkylthio groups at the 4-position.
  • 2-aminothiophene 13 was acylated to provide amide 14 which was cyclized to provide thienopyrimidinone 15.
  • the pyrimidinone was converted to chloride 16 and further to thioether 17 by standard procedures.
  • Acids of general formula 21 may also be converted to amides of general formula 22 or 23 through the intermediate acid chlorides by treatment first with oxalyl chloride or thionyl chloride, then with the amine of choice (R 2 , R 3 can be substituted or unsubstituted alkyl, aryl, heterocyclic).
  • aicds 21 may be converted to amides 22 or 23 by other coupling methods, such as carbodiimide (for example, N-ethyl-N'-(3- dimethylamino)propyl carbodiimide hydrochloride (EDC)), mixed anhydrides (derived from pivaloyl chloride or isobutyl chloroformate treatment), and active esters (for example, derived from N-hydroxysuccinimide, p-nitrophenol).
  • carbodiimide for example, N-ethyl-N'-(3- dimethylamino)propyl carbodiimide hydrochloride (EDC)
  • EDC N-ethyl-N'-(3- dimethylamino)propyl carbodiimide hydrochloride
  • mixed anhydrides derived from pivaloyl chloride or isobutyl chloroformate treatment
  • active esters for example, derived from N-hydroxysuccinimide, p-nitrophenol
  • Scheme 7 illustrates the analogous preparation of 4-ether-substituted thienopyridines of general formula 30.
  • Aldehyde 18 was substituted with alcohols (R 1 substituted or unsubstituted aryl, heterocyclic) under basic conditions (for example, potassium tert-butoxide or cesium carbonate in anhydrous tetrahydrofuran or dimethylformamide) to give pyridine-ethers of general formula 24, and then further reacted with methyl thioglycolate to provide the thieno[2,3-c]pyridine esters of general formula 25. These esters may be converted to the corresponding primary amides of general formula 26 by heating in methanolic ammonia solution.
  • esters of general formula 25 may be reacted with mono or disubstituted amines in polar solvents such as dimethylformamide or methanol.
  • Esters of general formula 25 were hydrolyzed to carboxylic acids of general formula 28 by basic hydrolysis with sodium or lithium hydroxide in aqueous methanol or tetrahydrofuran. The acids were then converted to amides of general formula 30 by reaction ofthe corresponding acid chlorides of general formula 29 with amines.
  • the acids 30 were coupled to amines by standard peptide-coupling conditions as described in Scheme 6 for amides 22 or 23.
  • Esters of general formula 33 were converted to amides of general formula 34 by the procedures described for 26, 27 or 30 in Scheme 7.
  • Scheme 9 shows the conversion of acids of general formula 21 to aldehyde or ketone-derived compounds.
  • aldehydes of general formula 36 were produced by reduction ofthe N-methyl-N-methoxylamides of general formula 35.
  • the amides of general formula 35 were also reacted with Grignard reagents to produce unsymmetrical ketones of general formula 39.
  • Aldehydes of general formula 36 and Ketones of general formula 39 were utilized for the production of oximes of general formula 37 or 40 by reaction with hydroxylamine derivatives.
  • Aldehyde of general formula 36 were reacted with phosphoranes (or phosphonoacetate salts) to produce 2-alkenyl substituted derivatives of general formula 38.
  • Ketones of general formula 39 were reduced to the corresponding alkanes of general formula 41 by treatment with hydrazine and strong base, such as potassium hydroxide.
  • Analogous 2-position derivatives of thienopyridine ethers of general formula 28 in Scheme 7 would follow similar synthetic routes as described in Scheme 9.
  • acids 28 may be converted to aldehydes, ketones, oximes, alkenes, or alkanes substitutions at the 2-position.
  • Amides of general formula 34 may be converted to the corresponding thionoamides of general formula 42 by treatment with Lawesson's reagent as shown in Scheme 10.
  • E + C0 2 , NCC0 2 CH 3 , RCHO, R 2 R 3 CO, CIS0 2 NR 2 , S0 2 , Rl or RBr, B(OiPr) 3 , CISnR 3 , CISiR 3
  • Scheme 13 illustrates an alternative method for the preparation of 2-carboxaldehydes of general formula 36 or 47.
  • the alcohols were then oxidized to the aldehydes using Swern conditions.
  • the aldehydes were then reacted with Wittig reagents (for example phosphoranes to produce the acrylate derivatives of general formula 48 (Jung, M. E. and Kiankarami, M. J. Org. Chem. 1998, 63, 2968-2974).
  • thienopyridines of general formula 27 or 30 were alkylated on the pyridine nitrogen using alkyl iodides (or alkyl bromides or triflates) to produce the pyridinium salts of general formula 49.
  • R may be alkylcarbonyloxymethylene, aminocarbonyloxymethylene, alkoxycarbonyloxymethylene, or alkyl.
  • Such derivatives may serve as prodrug forms ofthe thienopyridine amides 27 or 30.
  • 50 may be reacted with alkyl or arylmagnesium halides, or alkyl lithium salts, to provide amides of general formula 53.
  • Isocyanate 50 was hydrolyzed under aqueous conditions to produce 2-amino derivatives of general formula 54.
  • Amines of general formula 54 were reacted with appropriate electrophiles to further derivatize this position.
  • styryl derivative 56 was converted to the 1,2-diol 57 by treatment with osmium tetroxide under standard conditions.
  • the 4-(4-bromophenoxy) derivative 58 underwent fascile substitution with aryl boronic acids under palladium catalysis under Suzuki conditions to provide biaryl derivatives of general formula 59.
  • alkoxycarbonylation under palladium catalysis efficiently provides esters of general formula 61.
  • Scheme 19 shows the use of boronic acid derivatives to functionalize the 4- position ofthe thieno[2,3-c]pyridines.
  • the chemistry depicted may be applied to a broad range of aryl olefins analogous to bromostyrene 62.
  • bromostyrene 62 was converted to the boronic acid 63 under standard conditions, and the boronic acid was coupled to 4-bromothienopyridine 32 under Suzuki conditions, affording the styryl analog 64.
  • the ester 64 was converted to the amide 65 by the previously described method (Miyara, N and Suzuki, A. Chem. Rev. 1995, 95, 2457-2463).
  • the olefinic group may then be converted to the epoxide 66, which can undergo reactions with nucleophilic reagents at the less-hindered position ofthe epoxide to producing analogs of general formula 67.
  • styryl derivative 65 may be converted to the diol 68 by standard methods.
  • Scheme 21 depicts the preparation of 5-halo thienopyridine derivatives, as exemplified by the preparation ofthe 5-chloro analog 75.
  • Formylation of lithiated 2,3,5- trichloropyridine with methyl formate gave aldehyde 72.
  • Displacement ofthe 3 and 5 chlorines with excess 4-bromophenol and reaction with methylthioglycolate gave the 5-chlorothienopyridine 74 in low yield, together with the major product 73.
  • the 5-chloro isomer was treated with ammonia in methanol in a pressure tube to generate the amide 75. It should be noted that this chemistry may be applied using a range of phenols or hydroxy heterocyclic compounds in place of 4-bromophenol.
  • Scheme 23 illustrates the preparation of 4-acyl derivatives of thieno[2,3- c]pyridines.
  • Carboxylic acid 85 was converted to amide 86 via the acid chloride, then the hydroxyamide 86 underwent thionyl chloride-mediated cyclization to the oxazoline 87 (Meyers, A. I.; Stoianova, D. J. Org. Chem. 1997, 62, 5219-5221). Palladium mediated alkoxycarbonylation of 87 yielded ester 88 (Heck, R. F.; et al. J. Org. Chem. 1974, 39, 3318). Ester 88 may be converted to the Weinreb amide 89 by standard methods.
  • Scheme 24 depicts a proposed method for the formation of 4-hydroxy substituted thieno[2,3-c]pyridine.
  • Reaction of phenol 92 with dihydropyran under acidic conditions yields tetrahydropyranyl ether 93 (Grant, H. N., et al. Helv. Chim. Acta. 1963, 46, 41).
  • Lithiation of 93 and subsequent quench with methyl formate gives aldehyde 94.
  • Displacement ofthe halide with methyl thioglycolate and subsequent cyclization with cesium carbonate yields the ester 95.
  • Removal ofthe tetrahydropyranyl ether with aqueous HCl gives hydroxypyridine 96, which may be converted to the amide as described previously.
  • Scheme 25 proposes the use ofthe 4-hydroxy group for introduction of functionality to the 4-position ofthe thieno[2,3-c]pyridines.
  • the 2-carboxylic acid group is first protected as the oxazoline 99 (through the intermediate amide 98), then the hydroxy group is converted to the aryl triflate 100 by standard conditions.
  • Triflate 100 may then be converted to the N-methyl-N-methoxy amide 89 under conditions similar to that for bromide 87.
  • 4-triflate 100 may serve as a coupling partner in a variety of transition-metal mediated couplings with appropriate nucleophilic partners (for example, boronic acids, boranes, alkyl or aryl-zinc reagents).
  • Scheme 27 illustrates additional derivatives which can be derived from amino esters of general formula 108 or amino amides of general formula 109.
  • amino amides of general formula 109 may be treated with 1 , 1 '-carbonyldiimidazole to produce cyclic imides of general formula 110.
  • the 3-amino group was acylated (for example, with acid chlorides and weak base, or by coupling with acids using carbodiimides) to give the diamides of general formula 111.
  • the 3-amino group may be alkylated under reductive conditions using aldehydes and a reducing agent (such as triacetoxyborohydride), to provide alkylated amines of general formula 112.
  • Scheme 28 shows the preparation of compounds bearing alkyl substituents at the 3- position ofthe thieno[2,3-c]pyridines.
  • 3,5-dichloropyridine was deprotonated with strong base (for example, lithium dusopropylamide), and then reacted with an acylating reagent (ester, N-methyl-N- methoxyamide, acyl pyrazole, or others) to provide ketone 113.
  • an aldehyde for example, acetaldehyde
  • the product may be oxidized (for example, with tetrapropylammonium perruthenate) to provide ketone 113.
  • Scheme 29 describes a similar strategy used to obtain derivatives with alkoxy groups at the 3-position of thieno[2,3-c]pyridines.
  • Ester 116 was substituted and cyclized to provide 3-hydroxy analogs of general formula 117.
  • the hydroxy group may be left unsubstituted, leading to amides of general formula 118 (or other derivatives).
  • hydroxy esters of general formula 117 may be alkylated by standard procedures to produce 3 -alkoxy derivates of general formula 119, followed by amide formation to provide compounds of general formula 120.
  • Scheme 30 shows the procedure used for the transformation of a commercially available furo[2,3-b]pyridine 121 into an amide 122.
  • Scheme 31 proposes the preparation of thienopyridine derivatives containing an amide group at the 3-position.
  • Thienopyridines of general formula 44 are halogenated using electophilic halide sources (for example, N-bromosuccinimide, I 2 ), to produce
  • 3-halothienopyridines of general formula 123 Metal-halogen exchange, followed by trapping with carbon dioxide, provides acids of general formula 124.
  • the acids are converted into amides of general formula 125 by standard procedures, or may be homologated to esters of general formula 126 (for example, by the Arndt-Eisert procedure).
  • Esters of general formula 126 may then be converted to amides or other functionality by the methods described above.
  • Scheme 32 describes the methods used for the preparation of a variety of thieno[2,3-b]pyridines starting from the known 4-chloro-5 -ester 127. Displacement ofthe chlorine of 127 proceeded with thiols in the presence of potassium carbonate to provide 4-thioethers of general formula 128. Ester 127 was also hydrolyzed to the acid 129, which was converted to amides of general formula 130 by standard coupling conditions.
  • Scheme 33 shows the conversion of thioethers of general formula 128 to
  • the conesponding acids of general formula 131 may be thermally decarboxylated to provide the 5 -unsubstituted analogs of general formula 132.
  • Compounds of general formula 132 were treated with strong base (for example, n- butyllithium), and reacted with carbon dioxide to provide the 2-carboxylic acids of general formula 133.
  • the acids were then transformed into amides of general formula 134 by previously described procedures.
  • Scheme 34 illustrates the preparation of thieno[3,2-b]pyridines. Chloride 135 was transformed by a similar set of conditions to that described in Scheme 33 to produce acids of general formula 139 and amides of general formula 140.
  • Scheme 35 depicts the preparation of thieno[3,2-c]pyridines.
  • thienopyridone 141 4-oxo-4,5-dihydrothieno[3,2-c]pyridine-2-nitrile 144 was prepared according to literature methods (Eloy, F.; Deryckere, A. Bui. Soc. Chim. Belg. 1970, 79, 301; Troxler, F.; Wiskott. E. US Patent 3,998,835).
  • Treatment of thienopyridone 144 with phosphoryl chloride at 130 °C provided chloride 145, which upon exposure to thiols under basic conditions afforded thioethers of general formula 146.
  • Hydrolysis ofthe nitrile group with polyphosphoric acid gave the conesponding amides of general formula 147.
  • Scheme 37 shows the preparation of intermediates of general formula 151 useful for the preparation of alternative 2-derivatives.
  • Scheme 38 depicts an example ofthe preparation of a related class of inhibitors based on an oxazolopyridine structure.
  • Commercially available 3-chloropyridine is oxidized to the N-oxide 152 with peracetic acid, which is then nitrated in a mixture of concentrated nitric, concentrated sulfuric, and fuming sulfuric acids to give the 4-nitro derivative 153.
  • the chlorine in 153 is then displaced with the sodium salt of p-cresol, and the resulting biaryl ether 154 is hydrogenated (Raney nickel catalysis) to reduce both the nitro functional group and the N-oxide to give 155.
  • the amino group of 155 is protected with an ⁇ -trimethylacetyl group, and the 5-hydroxyl group is introduced according the procedure of Chu-Moyer and Berger (J. Org. Chem. 1995, 60, 5721) by formation ofthe dianion of 156, quenching with trimethyl borate, and oxidation ofthe intermediate boronate ester followed by hydrolysis with basic hydrogen peroxide to give hydroxypyridine 157.
  • the amide is hydrolyzed with hydrochloric acid to give 158, which is condensed with methyl oxalyl chloride to give the oxazolopyridine 158.
  • the methyl ester in 159 was then converted to the primary amide by treatment with ammonia in methanol to give the target compound 160.
  • Scheme 39 illustrates an example ofthe preparation of an analogous thiazolopyridine-based inhibitor.
  • the scheme illustrates the use of para-cresol substituted pyridine as starting material, but the synthesis may be generalized to other aryl, heterocyclic, or alkyl ethers.
  • the dianion of 4-(N-trimethylacetyl)-amino-3-(4- methylphenoxy)-pyridine is quenched with tetramethylthiuram disulfide to introduce the 5-mercapto group into the substituted pyridine ring as dithiocarbamate 161.
  • a related imidazopyridine class of compounds may be prepared from intermediates shown in Scheme 40.
  • 5 -Hydroxypyridine 157 may be converted to the conesponding aniline 166 by heating in ammonium hydroxide saturated with sulfur dioxide in a pressure vessel (Newman and Gait, J. Org. Chem. 1960, 25, 214).
  • the resulting diaminopyridine 167 may be condensed with methyl oxalyl chloride to give the imidazopyridine 168.
  • the ester functionality may then be converted to amide 169 by treatment with ammonia in methanol, as described previously.
  • Scheme 41 is an illustration ofthe preparation of thienopyridazine-containing inhibitors.
  • the protected thiophene acid 170 was deprotonated with strong base (e.g. n- butyllithium), and reacted with a formylating reagent.
  • strong base e.g. n- butyllithium
  • the resultant oxazoline aldehyde 171 was hydrolyzed and cyclized with hydrazine to provide the hydroxy thienopyridazine 172.
  • the hydroxy group was converted to the chloride 173 by the action of phosphorous oxy chloride and subsequent substitution by alkoxides produced the ethers 174.
  • the amide group is introduced in a manner analogous to that described above for the thienopyridines, providing amide 176.
  • Scheme 43 outlines the preparation of 4-(4-aminophenoxy)thieno[2,3-c]pyridine-2- carboxamide using a modification ofthe route described in Scheme 7.
  • a two step sequence was adopted for assembling the thienopyridine core in the synthesis of 182.
  • Treatment ofthe dichloropyridine aldehyde with one equivalent of N-BOC-protected 4- hydroxyaniline afforded compound 179, which was cyclized to give ester 180. Transformation to the amide 181 followed the previously described procedure, and the Boc-group was removed by treatment with trifluoroacetic acid.
  • aniline 182 also serves as starting material for Sandmeyer reactions via the diazonium salt, in which the amino group may be converted to a variety of functional groups, including halo, hydroxy, cyano, among other standard Sandmeyer products.
  • Scheme 44 exemplifies a general method for the preparation of 4-substituted aminophenoxythieno[2,3-c]pyridines using methodology described by Buchwald, et al. (Wolfe, John; Buchwald, Stephen L. J. Org. Chem. 1997, 62, 6066).
  • Iodide 183 prepared by the previously described methods, was coupled with disubstituted amines (such as morpholine in the above example) in the presence of bis(dibenzylideneacetone)dipalladium and BINAP to provide the substituted aniline 184.
  • Scheme 45 describes the preparation of 4-(4-hydroxymethylphenyl)thieno[2,3- c]pyridine 188, utilizing a modification ofthe route shown in Scheme 7. Starting with mono-tritylated 4-hydroxybenzyl alcohol, condensation with dichloroaldehyde 18, followed by cyclization with methyl thioglycolate, provided protected benzyl alcohol 188. Standard transformations provided alcohol 188.
  • Scheme 46 describes the preparation of a protected benzyl alcohol 190, starting from mono-tetrahydropyran-protected hydroxybenzyl alcohol 189. Standard acid- catalyzed hydrolysis ofthe THP group can also yield the benzyl alcohol analog 188.
  • benzyl alcohol 188 may be further derivatized to esters, using standard coupling procedures, for example by carbodiimide conditions shown above, or by use of acid chloride.
  • Glycosides of benzyl alcohol 187 may be produced using the procedure outlined in Scheme 48. Treatment of the alcohol 187 and tri-O-acetyl-D-glucal with stoichiometric scandium triflate afforded stereo-specifically protected glycoside 192, which was deprotected with methyl amine to give the free glycoside 193.
  • Scheme 51 exemplifies the preparation of 4-heterocyclephenoxythienopyridines.
  • Cyano derivative 202 was transformed into imidazoline 205 under the conditions described above. Incorporation of other heterocycles was accomplished using known Stille, Suzuki, or Heck conditions as exemplified by the Stille coupling of iodo compound 194 and tributylstannylthiophene to provide compound 205 A.
  • the aryl coupling reactions described above may be applied to compounds with a variety of substituents at C-2 ofthe thienopyridine, in addition to the methyl amides exemplified in Scheme 51.
  • Cyclopropylcarbinyl alcohol derivatives ofthe 4-phenyl ethers may be prepared according to the procedure described in Schemes 52 and 53.
  • Commercially available phenylcyclopropane carboxylic acid is converted to the conesponding alcohol 206 by LAH reduction, then demethylation and selective protection ofthe hydroxymethyl group affords phenol 207.
  • phenol 207 was condensed with dichloroaldehyde 18 and then methyl thioglycolate, to produce thienopyridine 208. Standard transformations led to the desired compounds 209 and 210.
  • Scheme 53
  • alcohol 206 was alkylated to produce the polyether phenol 211 which was converted into cyclopropylcarbinyl polyether 212 using similar procedures described in Scheme 52.
  • Such alkylation chemistry may be broadly applied by replacement ofthe diether tosylate shown with other alkyl halides or sulfonate esters.
  • difluoroacetic acid derivative 213 was synthesized by a copper mediated coupling between iodide 194 and ethyl iododifluoroacetate in the presence of phenol, which was found to remarkably inhibit side reactions. Reduction of the ester 213 gave difluoroethyl alcohol 214. Alkylation of alcohol 214 with ethoxyethyl tosylate in the presence of sodium hydride and 15-crown-5 afforded polyether 215.
  • Phenol 219 also serves as a partner in Mitsunobu reactions with a variety of primary or secondary alcohols, to provide alkyl ethers of general formula
  • Esters of general formula 221 were converted to amides of general formula 222 by treatment under the standard conditions of reflux with methanolic amine solutions.
  • Thienopyridine analogs bearing a 4-carbonyl group may be prepared by the procedures described in Scheme 56.
  • Dichloropyridine aldehyde 18 was treated with methyl thioglycolate under previously described conditions to produce the 4-chlorothienopyridine ester 223.
  • Ester exchange was accomplished by base catalyzed hydrolysis to acid 224, and tert-butyl esterification to 225 was accomplished with O-t-butyl trichloroacetimidate under Lewis acid catalysis. Palladium-catalyzed carbethoxylation proceeded under previously described conditions to give diester 226.
  • ester 228 may be transformed to various 2- substituted thienopyridine analogs directly, or oxidized to the conesponding 4-keto derivative 230. Standard transformation of ester 230 to amide 231 completes the synthesis.
  • ester 226 may be selectively converted to amide derivatives by initial alkaline hydroysis ofthe ethyl ester, coupling to an amine, then acidic hydrolysis ofthe tert-butyl ester, and finally coupling to another amine to produce 308.
  • Scheme 58 illustrates the conversion of aldehyde 233 to the acrylate 236, which was accomplished by Homer-Emmons condensation with trimethyl phosphonoacetate (Jung, M. E. and Kiankarami, M. J. Org. Chem. 1998, 63, 2968-2974).
  • the described methods may be extended to analogs bearing a wide variety of C-4 substituents, including aryloxy, alkoxy, arylamino, aryl, alkyl.
  • the derived ester 236 was then subjected to hydrolysis to provide acid 237.
  • Carboxylic acid 237 was subjected to standard coupling conditions to produce amide 238.
  • the derived acrylates of general formula 239 may be oxidized to the conesponding diols of general formula 240 with catalytic osmium tetroxide in the presence of 4-methylmorpholine-N-oxide.
  • the strategy outlined is generally applicable to analogs with a variety of L A X A substituents.
  • Aldehydes of general formula 233 were also reacted with organomagnesium (or organolithium) reagents to produce secondary alcohols which were oxidized to the conesponding ketones of general formula 242.
  • Oxidation is preferably accomplished by standard Swern conditions (DMSO and oxalyl chloride in CH 2 C1 2 solution at low temperature, followed by treatment with tertiary amines such as ethyldiisopropyl amine), but other conditions (tetra- n-propyl perruthenate, manganese dioxide) may be employed.
  • DMSO and oxalyl chloride in CH 2 C1 2 solution at low temperature followed by treatment with tertiary amines such as ethyldiisopropyl amine), but other conditions (tetra- n-propyl perruthenate, manganese dioxide) may be employed.
  • tertiary amines such as ethyldiisopropyl amine
  • manganese dioxide tetra- n-propyl perruthenate, manganese dioxide
  • Nitriles of general formula 244 were also converted to cyanoamidines of general formula 248 when subjected to excess cyanamide in THF with DBU as the base.
  • the 3-amino- 1 ,2,4-oxadiazoles of general formula 249 were then generated by treatment of cyanoamidines of general formula 248 with hydroxylamine hydrochloride and triethy amine in methanol.
  • Scheme 61 depicts the preparation of 2-arylcarbonylthienopyridines.
  • Thienopyridines of general formula 44 were deprotonated with alkyllithium base and condensed with nitrobenzaldehdyes to produce the benzyl alcohols of general formula 250.
  • Tin(II)-induced reduction ofthe nitrophenyls to the anilines of general formula 251 were followed by selective alcohol oxidation with pyridinium chlorochromate.
  • the nitro benzyl alcohols of general formula 250 were also converted to the conesponding ketones of general formula 253 under Swern conditions (for example, oxalyl chloride/DMSO/CH 2 Cl 2 at low temperature, followed by treatment with amine bases).
  • Scheme 62 depicts the preparation of 2-carbamatethienopyridines and 2- ureathienopyridines.
  • Alcohols of general formula 232 were converted to the amines of general formula 254 by Mitsunobu reaction with phthalimide, followed by deprotection with hydrazine.
  • the amines of general formula 254 were converted to the conesponding ureas of general formula 255 by reaction with potassium isocyanate under acidic conditions.
  • the alcohols of general formula 232 were converted to the conesponding carbamates of general formula 256.
  • This chemistry is generally applicable to the use of substituted isocyanates or carbamoyl chlorides, leading to mono or disubstituted carbamates or ureas.
  • Scheme 63 illustrates the preparation of 2-thioureathienopyridines, starting from 2-aminothienpyridines of general formula 54. Reaction of 54 with substituted isothiocyanates in pyridine at reflux provided the thioureas of general formula 257.
  • Scheme 64 illustrates the preparation of 2-thioureathienopyridines, starting from 2-aminothienpyridines of general formula 54. Reaction of 54 with substituted isothiocyanates in pyridine at reflux provided the thioureas of general formula 257.
  • Scheme 64 exemplifies the synthesis of sulfonamides at the 2-position ofthe thienopyridines.
  • An improved procedure for decarboxylation of thienopyridine-2- carboxylic acids is shown, wherein acids of general formula 21 were heated in diphenylether at 210 °C to provide thienopyridines of general formula 44 in high yield.
  • Compounds 44 were deprotonated with strong base, then treated with sulfur dioxide to produce intermediate sulfinic acids.
  • N-chlorosuccinimide produced sulfonyl chlorides of general formula 258, from which a variety of sulfonamides of general formula 259 were prepared by reaction with ammonia, primary or secondary amines in the presence of diisopropylethylamine in protic solvents such as methanol (Prugh, J. D., et al. J. Med. Chem. 1991, 34, 1805-1818; Davidsen, S. K., et al. J. Med. Chem. 1998, 41, 74- 95).
  • protic solvents such as methanol
  • Scheme 65 provides the outline ofthe synthesis of additional 2-arylthienopyridines with amino or hydroxy groups on the aryl ring.
  • Suzuki coupling of boronic acids of general formula 79 with nitro-substituted aryl iodides produced biaryls of general formula 260.
  • Biaryls of general formula 260 were reduced to the aminophenyl derivatives of general formula 261 with tin(II) chloride.
  • Methyl ethers of general formula 262 were prepared from boronic acids 79 by coupling with methoxy iodobenzenes, and were converted to the hydroxy derivatives of general formula 263 through the use of boron tribromide to demethylate the methyl ethers.
  • Schemes 66-71 illustrate syntheses for additional 5-membered heterocycles at the 2-position ofthe thienopyridines.
  • Scheme 66 outlines a method for producing 1,3,4- oxadiazoles.
  • Hydrazides of general formula 264 were prepared by treating esters of general formula 20 or 25 with hydrazine in methylene chloride. The hydrazides were converted to 5-amino-l,3,4-oxadiazoles of general formula 265 by reaction with cyanogen bromide. Hydrazides of general formula 264 may be converted to 5 -unsubstituted or 5- alkyl-substituted-l,3,4-oxadiazoles of general formula 266 by condensation with orthoesters under reflux conditions.
  • Scheme 67 indicates a method of preparing 1,3,4-triazoles from methyl esters of general formula 20 or 25. Condensation with aminoguanidine under basic conditions (for example sodium methoxide in methanol) produced the 2-amino- 1,3 ,4-triazoles of general formula 267. Nonspecific methylation was performed on 1,3,4 triazoles of general formula 267 using sodium hydride and methyl iodide, which provided mono-methyl triazoles of general formula 268, dimethyl triazoles of general formula 269, and trimethyl triazoles of general formula 270, which were chromatographically separable.
  • Scheme 68 indicates a method for the preparation of 1 ,3,4-thiadiazoles of general formula 272.
  • the acid chlorides derived from acids of general formula 21 or 28 were reacted with thiosemicarbazide or substituted thiosemicarbazides to give intermediate acylated thiosemicarbazides of general formula 271, which were cyclized under acid catalysis (for example methanesulfonic acid in refluxing toluene) to provide thiadiazoles of general formula 272.
  • Scheme 69 provides a method for the preparation of l,3,4-oxadiazol-2-thiones and the derived alkylthio-substituted oxadiazoles of general formula 274.
  • Hydrazides of general formula 264 were treated with carbon disulfide in potassium hydroxide in aqueous ethanol solution to give the cyclic thiocarbamates of general formula 273.
  • the thiocarbonyl group was alkylated in low yield with alkyl halides to give the alkylthio 1,3,4-oxadiazoles of general formula 274.
  • Scheme 70 shows the preparation of tetrazoles at the 2-position of thienopyridines.
  • 2-Cyano derivatives of general formula 244 were converted to tetrazoles of general formula 275 using trimethylsilyl azide in the presence of catalytic dibutyltin oxide.
  • the tetrazoles were converted to the N-methyl derivatives of general formula 276 by use of a solution of diazomethane in methanol.
  • Scheme 71 illustrates the syntheses of 2-oxazole and 2-imidazole thienopyridines.
  • Chloroethyl amides of general formula 277 were prepared by chlorination ofthe conesponding hydroxyethyl amides and then cyclized to oxazolines of general formula 278 under basic catalysis (for example, diazabicycloundecane in dichloromethane).
  • the oxazolines of general formula 278 may be converted to the oxazoles of general formula 278 by dehydrogenation according to the procedure of Meyers (Meyers, A. I., et al. J. Amer. Chem. Soc. 1975, 97, 7383).
  • Aminoethyl amides of general formula 280 were cyclized to the imidazolines of general formula 281 by treatment with calcium oxide at high temperature in diphenyl ether. Imidazolines of general formula 281 may be converted to imidazoles of general formula 282 by literature methods (Hughey, J. L., et al. Synthesis [SYNTBF] 1980, (6), 489). Scheme 72
  • Scheme 73 provides a synthesis for 3-carboxythienopyridines.
  • 3,5-dichloropyridine was treated with strong base such as lithium dusopropylamide in anhydrous ethereal solvent at low temperature, followed by the addition of t-butyl chlorooxoacetate to provide the 4-tert-butyl-2-ketoester of 3,5-dichloropyridine 283.
  • the ester 283 was then reacted with 1.25 equivalents of preformed potassium phenoxides at ambient temperature, to give the monoaryloxy derivatives as the main product.
  • the monoaryloxy esters were treated with methyl thioglycolate and base such as potassium t-butoxide or cesium carbonate to provide the desired thienopyridine diesters of general formula 284.
  • the diesters of general formula 284 were then treated with methanolic amines to give the conesponding 3 -tert-butyl ester amides of general formula 285.
  • the tert-butyl ester amides of general formula 285 were converted to the conesponding acid amides of general formula 287 by solvolysis with trifluoroacetic acid.
  • Diesters of general formula 284 may also be converted to the acids of general formula 286 by a similar solvolysis reaction.
  • Scheme 74 describs the use of 4-bromothienopyridine 32 to prepare 4-amino substituted thienopyridine derivatives.
  • Ester 32 was converted to amides of general formula 288 by standard procedures, and then coupled to a variety of amines using palladium(O) catalysis, as described by Buchwald (J. Org. Chem. 1997, 62, 6066-6068), producing 4-amino derivatives of general formula 289.
  • Scheme 75 outlines the preparation and reactions of 7-chloro and 7- bromothienopyridine derivatives.
  • the analogs are useful for preparing active derivatives as well as serving as synthetic intermediates for a variety of 7-substituted thienopyridines.
  • Esters of general formula 25 were oxidized to the pyridine-N-oxides of general formula 290 with meta-chloroperbenzoic acid.
  • the N-oxides were reananged to the 7-halo derivatives of general formula 291 by warming in phosphorous oxy chloride or phosphorous oxybromide.
  • the resultant 7-halides could be converted to the amide derivatives of general formula 292 by standard methods without reaction ofthe 7-chloro or 7-bromo moieties.
  • the chloro or bromo groups could be substituted with amines or alcohols to provide 7-amino derivatives of general formula 293 and 7-alkoxy derivatives of general formula 294 respectively.
  • Esters of general formula 294 were converted to amides of general formula 295 using standard methods.
  • 7-Hydroxy analogs of general formula 296 were prepared from 291 derivatives using acetic anhydride followed by hydrolysis with water.
  • the 7-halo derivatives 291, in particular the 7-bromo derivatives were effective educts in Suzuki reactions with aryl boronic acids, similar to those described in Scheme 19 and 65.
  • Scheme 76 describes the preparation of furopyridine analogs such as 299 (Example 327).
  • dichloropyridinecarboxaldehyde 18 was reacted sequentially with a potassium phenoxide, then with ethyl glycolate, followed by cyclization under basic conditions, affording furopyridine ester 298 in low yield.
  • Standard hydrolysis and coupling conditions afforded the amide 299.
  • the amide was converted to the thioamide 300 by treatment with Lawesson's reagent in hot toluene.
  • Scheme 77 describes the preparation of furopyridine analogs such as 299 (Example 327).
  • Scheme 77 illustrates the preparation N-alkyl 5-amino-l,3,4,-oxadiazoles.
  • the treatment of 265 in refluxing trimethylorthoformate followed by reduction ofthe eneamine intermediate with sodium borohydride in refluxing ethanol provides the N-alkylated 5- amino-l,3,4,-oxadiazoles of general formula 301.
  • Scheme 78 exemplifies the synthesis of substituted vinyl moieties at the 4-position of thienopyridines.
  • Treatment of aldehyde 227 with the appropriate diethylphosphonate in the presence of potassium bis(trimethylsilyl)amide provided 302.
  • Compound 302 was then treated with sulfuric acid in methanol to yield the methyl ester 303, followed by standard amide formation with ammonia and methanol to produce 4-vinylsubstituted thienopyridines of general formula 304.
  • Installation of a substituted vinyl can also be accomplished by using Wittig phosphorane chemistry.
  • Scheme 79 demonstrates the preparation of 4-substituted alkyl thienopyridines.
  • Alcohol 228 was subjected to palladium on carbon in acetic acid to generate the methylene derivative 305.
  • Treatment of 305 with sulfuric acid in methanol yields 306.
  • Formation of the amide is accomplished by treatment of 306 with ammonia in methanol to yield 307
  • Scheme 80 illustrates the preparation of thiazole derivatives at the 2-position of thienopyridines.
  • Thioamides of general formula 309 were alkylated and cyclized with ethyl bromopyruvate, providing thiazole esters of general formula 310.
  • Standard amide formation led to amides of general formula 311.
  • Other amines may be used to produce a variety of substituted amides.
  • esters of general formula 310 may be converted to carbamates of general formula 312 through Curtius reanangement ofthe intermediate acid.
  • the tert-butyl carbamates of general formula 312 were converted to the primary amines of general formula 313 by the action of trifluoroacetic acid.
  • Aldehyde 18 was reacted with the appropriate organomagnesium halide, to give an intermediate secondary alcohol, which was oxidized to the conesponding ketone 314.
  • the method of oxidation was the Swem procedure, although other standard oxidations of this type may be employed (e.g PCC, TPAP).
  • the procedure then follows that previously described for the 3 -unsubstituted analogs, leading to ester 315. Ester 315 then served as starting material for the preparation of amides, or other heterocyclic derivatives at the 2-position ofthe thienopyridines.
  • Scheme 82 describes a method for producing cyclic derivatives between the 2- and 3-positions of thienopyridines.
  • Compound 316 can then be reacted with a primary amine, through alkylation and acylation, leading to the tricyclic lactam 317.
  • These esters in turn can be reacted with substituted amines to yield the conesponding amides 319.
  • Example 1A methyl 6-ethyl-3.4-dihydro-4-oxothieno[2 -d]pyrimidine-2-carboxylate
  • the desired compound was prepared as described in J. Heterocylic Chem. 1987, 24, 581-587.
  • Example IB 6-ethylthienor2.3-d1pyrimidin-4(3H " )-one
  • Example 1A 35 g, 140 mmol
  • LiCl 6.5 g, 153 mmol
  • DMSO 80 mL
  • water 8 mL
  • the extract was dried (MgSO 4 ), filtered, and concentrated to provide the designated compound.
  • Example IC 4-chloro-6-ethylthieno 2.3-d1pyrimidine
  • Example IB (3.97 g, 22.0 mmol) in POCI3 (22 mL) was heated to reflux for 2 hours, cooled, poured onto ice, diluted with water, made basic with concentrated ammonium hydroxide, and extracted with ethyl acetate. The extract was dried (MgSO 4 ), filtered, and concentrated. The residue was purified by flash chromatography on silica gel with 10% ethyl acetate-hexane to provide the designated compound.
  • Example IC (0.25 g, 1.26 mmol) in DMF (1.2 mL) was treated sequentially with methyl thioglycolate (0.134 g, 1.26 mmol) and potassium carbonate (0.174 g, 1.26 mmol), stined at room temperature for 18 hours, cooled, poured into water, diluted with brine, and extracted with dichloromethane. The extract was washed with water and brine, dried (MgSO4), filtered, and concentrated. The residue was triturated then washed with 10% ethyl acetate/hexanes to provide the title compound. mp 36-58 °C;
  • Example 2 6-ethyl-4- [(4-methylphenyl)thio]thieno [2,3 -dlpyrimidine
  • Example IC was processed as in Example ID but substituting thiocresol for methyl thioglycolate to provide the title compound, mp 56-58 °C;
  • Example 3 6-ethyl-4-(2-pyridinylthio)thieno 2,3-d]pyrimidine
  • Example IC was processed as in Example ID but substituting 2-mercaptopyridine for methyl thioglycolate to provide the title compound, mp 76.5-79 °C;
  • Example 4 6-ethyl-4-[( , 2-methylethyl)thio]thieno
  • Example IC was processed as in Example ID but substituting isobutyl mercaptan for methyl thioglycolate to provide the title compound.
  • MS (DCI/NH3) m/z 253 (M+H) + ;
  • Example 5 6-ethyl-4-[(phenylmethv0thio]thieno[2,3-d]pyrimidine
  • Example IC was processed as in Example ID but substituting benzyl mercaptan for methyl thioglycolate to provide the title compound. mp 54-60 °C;
  • Example 6 6-ethyl-4-[(5-methyl-1.3.4-thiadiazol-2-yl)thio]thienor2.3-d]pyrimidine
  • Example IC was processed as in Example ID but substituting 5-methyl- 1,3,4- thiadiazol-2-thiol for methyl thioglycolate to provide the title compound, mp 132-135 °C; MS (DCI NH3) m/z 295 (M+H) + ;
  • Example 7 ethyl 6-ethyl-4-[(4-methylphenyl)thio]thieno[2.3-d]pyrimidine-6-carboxylate
  • Example 1 A was processed as in examples IC and 2 and to provide the title compound. mp 87.5-90 °C;
  • Example 8 6-ethyl-N-(phenylmethyDthieno[2,3-d]pyrimidin-4-amine
  • Example IC (0.27 g, 1.37 mmol) in isopropanol (1.5 mL) was treated with benzylamine (0.19 mL, 1.71 mmol) and sodium carbonate (0.24 g, 2.3 mmol), stined at room temperature overnight, filtered, and concentrated. The residue was purified by flash chromatography on silica gel with 25% ethyl acetate/hexanes to provide the title compound. mp 128-131 °C;
  • Example 9 6-ethyl-N-(5-methyl-13,4-thiadiazol-2-v ⁇ thieno[2,3-d1pyrimidin-4-amine
  • a solution of Example IC (0.20 g, 1.01 mmol) in isopropanol (2 mL) was treated with 2-amino-5-methyl-l ,3,4-thiadiazole (0.15 g, 1.26 mmol) and sodium carbonate (0.18 g, 1.7 mmol), stined at room temperature for 48 hours, treated with cesium carbonate (0.55 g, 1.7 mmol), stined at reflux for 24 hours, concentrated, treated with water, and extracted with dichloromethane. The extract was dried (MgSO 4 ), filtered, and concentrated. The residue was recrystallized with ethanol/water to provide the title compound. mp 277-280 °C;
  • Example 10A was processed as in Bull. Soc. Chim. France 1975, p 815 to provide the designated compound.
  • Example 10B 6-ethyl-2-phenylmethylthieno[2.3-d]pyrimidin-4(3H)-one
  • Example 10B was stined in dioxane/water in the presence of 10% Na2CO3 to provide the designated compound.
  • Example 10C 4-chloro-6-ethyl-2-(phenylmethyl thieno[2,3-d]pyrimidine
  • Example 10C was processed as in Example IC to provide the designated compound.
  • Example 10D and 5-amino- 1, 3 ,4-thiadiazole-2-thiol were processed as in Example ID to provide the title compound.
  • Example 16B 7-methyl-4-r( ' 4-methylphenyl thio1thieno[3.2-d]pyrimidine-2-carboxamide
  • a suspension of Example 16A in dichloromethane (3.3 mL) was treated sequentially with oxalyl chloride (0.03 mL, 0.33 mmol) and DMF (1 drop), and concentrated after formation ofthe acid chloride.
  • the residue was suspended in THF (10 mL), transfened to a vigorously stined solution of 1 :1 ammonium hydroxide/water (10 mL), and extracted with dichloromethane. The extract was dried (MgSO4), filtered, and concentrated.
  • the residue was recrystallized from ethyl acetate/hexanes to provide the title compound, mp 243-246 °C;
  • Example 17A 3,5-dichloropyridine-4-carboxaldehyde Diisopropyl amine (15.6 mL, 0.111 mol) in dry THF (25 mL) at 0 °C was treated with n-BuLi (44.6 mL, 2.5 M in hexane, 0.111 mol) over 35 minutes, stined for 30 minutes, cooled to -78 °C, diluted with THF (100 mL), and a solution of 3,5- dichloropyridine (15.0 g, 0.101 mol) in THF (175 mL) was added slowly over 3.5 hours in order to maintain an internal temperature ⁇ -74 °C.
  • the solution was stined at -78 °C for 30 minutes, treated dropwise over 35 minutes with methyl formate (12.5 mL, 0.203 mmol) in THF (50 mL) maintaining an internal temperature of ⁇ -74 °C, stined at -78 °C for 1.4 hours, rapidly carmulated into a ice cold solution of saturated NaHCO3 with vigorous stining, partitioned with ethyl acetate (500 mL), extracted sequentially with saturated NaHCO3 (2x100 mL), brine (3x150 mL), dried (MgSO4), and concentrated. The residue was purified by flash chromatography on silica gel with 10% acetone/hexane.
  • Example 17B 3-(4-methylphenylthioV5-chloro-4-pyridinecarboxyaldehvde
  • Example 17A (5.05 g, 28.7 mmol) in DMF (70 mL) was treated with p-thiocresol (3.56 g, 28.7 mmol) and potassium carbonate (4.36 g, 31.6 mmol), stined for 0.5 hours at 0 °C then for 1 hour at room temperature, poured into water, diluted with brine, and extracted with dichloromethane. The extract was washed sequentially with water and brine, dried (MgSO 4 ), filtered, and concentrated to provide the designated compound.
  • Example 17B A solution of Example 17B was processed as in Example ID to provide the title compound. mp 116-119 °C;
  • Example 18 A suspension of Example 18 (0.535 g, 1.78 mmol) in dichloromethane (25 mL) at 0 °C was treated sequentially with oxalyl chloride (0.34 g, 2.67 mmol) and DMF (1 drop), stined at room temperature for 0.5 hours, and concentrated. The residue was suspended in THF, treated with THF (60 mL), water (30 mL), and concentrated NH 4 OH (30 mL), and stined for 0.5 hours. The THF layer was separated, washed with brine, partially dried (MgSO 4 ), filtered, and concentrated. The residue was purified by flash chromatograpy on silica gel with 5% methanol/dichloromethane and recrystallized from 95% ethanol to provide the title compound, mp 198-199 °C;
  • Example 17A was processed as in examples 17B, 17C, 18, and 19 but substituting 2-mercaptopyridine for p-thiocresol in Example 17B to provide the title compound, mp 239-242 °C; MS (DCI/NH3) m/z 305 (M+NH 4 ) + ; l H NMR (300 MHz, DMSO-d 6 ) ⁇ 6.99 (d, IH), 7.17 (dd, IH), 7.65 (dt, IH), 7.85 (br s,
  • Example 21 4- [(4-chlorophenyl)thio]thieno [2.3 -c]pyridine-2-carboxamide
  • Example 17A was processed as in examples 17B, 17C, 18, and 19 but substituting 4-chlorothiophenol for p-thiocresol in Example 17B to provide the title compound. mp 239-241 °C;
  • Example 22 N-methoxy-N-methyl-4-[(4-methylphenyl)thio1thieno[2,3-c]pyridine-2-carboxamide A solution of Example 18 (0.66 g, 2.2 mmol) in dichloromethane was treated sequentially with oxalyl chloride (0.29 mL, 3.3 mmol) and DMF (1 drop), stined for 30 minutes, and concentrated.
  • Example 23 N-methoxy-4- [(4-methylphenyl thiolthieno 2.3 -c]pyridine-2-carboxamide
  • Example 18 was processed as in Example 22 but substituting O-methylhydroxyl- aminehydrochloride for N,O-dimethylhydroxylamine hydrochloride to provide the title compound. mp 200-203 °C;
  • Example 25 4-[(4-methylphenv ⁇ thio1thieno[2.3-c]pyridine-2-carboxaldehvde
  • a solution of Example 22 (3.33 g, 9.6 mmol) in THF at -5 °C was treated dropwise with 1M DIBA1-H in THF (14.5 mL, 14.5 mmol), stined for 45 minutes, poured into ice HCl with constant stining, and extracted with dichloromethane. The extract was dried (MgSO4), filtered, and concentrated to provide the title compound.
  • MS DCI/NH3) m/z 303 (M+H) + ;
  • Example 26 4-[(4-methylphenv ⁇ thio]thieno[2.3-c1pyridine-2-carboxaldehyde. O-methyloxime A solution of Example 25 (0.22 g, 0.76 mmol) in 1 :1 pyridine:ethanol (8 mL) was treated with methoxylamine hydrochloride (0.51 mL, 1.52 mmol), stined at room temperature for 3 hours, concentrated, treated with water and extracted with dichloromethane. The extract was washed with IN HCl, dried (MgSO4) ; filtered, and concentrated. The residue was purified by flash chromatography on silica gel with 20% ethyl acetate/hexanes to provide the title compound. mp 95-98 °C;
  • Example 27 4-[f4-methylphenv0thiolthieno[2.3-c]pyridine-2-carboxaldehyde, O-(phenylmethyl)oxime Example 25 and O-benzylhydroxylamine hydrochloride were processed as in Example 26 but for 18 hours instead of 3 hours to provide the title compound, mp 127-133 °C;
  • Example 28 2-[rr4-[(4-methylphenyl)thiolthieno[2,3-c]pyridin-2-ylmethylene1amino]oxy]acetic acid
  • Example 25 was processed as in Example 26 but substituting carboxymethoxyl- amine hemihydrochloride for methoxylamine hydrochloride to provide the title compound. mp 227-230 °C;
  • Example 29 4-r( ' 4-methylphenyl)thio]thieno[2.3-c]pyridine-2-carboxaldehvde.
  • O-phenyloxime Example 25 was processed as in Example 26 but substituting O-phenylhydroxyl- amine hydrochloride for methoxylamine hydrochloride to provide the title compound, mp 94-97 °C;
  • Example 25 was processed as in Example 26 but substituting hydroxylamine hydrochloride for methoxylamine hydrochloride to provide the title compound, mp 209-210 °C;
  • Example 28 was processed as in Example 19 to provide the title compound, mp 152-156 °C; MS (DCI/NH 3 ) m/z 358 (M+H) + ;
  • Example 32 (E)-3-[( ' 4-methylphenyl)thio]thieno[2.3-c]pyridin-2-yl1-2-propenamide
  • Example 25 (0.23 g, 1.27 mmol) in chloroform (10 mL) was treated with carbamoylmethylenetriphenylphosphorane (0.41 g, 1.27 mmol), heated to reflux for 30 minutes, cooled, and concentrated. The residue was purified with flash chromatography on silica gel with 2% methanol/dichloromethane to provide the title compound, mp 171-174 °C;
  • Example 22 A solution of Example 22 in THF (25 mL) at 0 °C was treated with methyl magnesium bromide (1.4M in toluene/THF, 1.85 mL, 2.6 mmol), warmed to room temperature, stined overnight, treated with methylmagnesiumbromide (1.4M in toluene/THF, 0.7 mL, 1.3 mmol) stined for 1 hour, poured with constant swirling onto ice/NH 4 Cl, and extracted with ethyl acetate. The extract was dried (MgSO4), filtered, and concentrated. The residue was purified by flash chromatography on silica gel with 20% ethyl acetate/hexanes to provide the title compound. mp 134-138 °C;
  • Example 22 and phenyl lithium were processed as in Example 33 to provide the title compound, mp 103-107 C; MS (DCI/NH3) m/z 362(M+H) + ;
  • Example 35 2-ethyl-4-[(4-methylphenyl thio]thienor2.3-c]pyridine
  • ethylene glycol (10 mL) was treated with hydrazine hydrate (0.18 mL, 5.8 mmol), stined at 160 °C for 30 minutes, cooled to room temperature, treated with potassium hydroxide, stined at 150 °C for 45 minutes, cooled to room temperature, treated with water, and extracted with ethyl acetate.
  • the extract was washed with water, dried (MgSO 4 ), filtered, and concentrated.
  • the residue was purified by flash chromatography on silica gel with 10% ethyl acetate/hexanes to provide the title compound.
  • Example 36 l-[4-[(4-methylphenyl ' )thio1thieno[2.3-clpyridin-2-yl]ethanone.
  • oxime Example 33 and hydroxylamine hydrochloride were processed as in Example 26 to provide the title compound. mp 209-213 °C; MS (DCI/NH3) m/z 315 (M+H) + ;
  • Example 37 N-C2.3 -dihydroxypropyl - [(4-methylphenyl ' )thiolthieno [2,3 -c]pyridine-2-carboxamide
  • a solution of Example 18 (2.5 g, 8.3 mmol) and N-hydroxysuccinimide (0.95 g, 8.3 mmol) in dichloromethane (35 mL) was treated with DCC (1.882 g, 9.13 mmol) in methylene chloride (15 mL), stined at room temperature for 18 hours, and concentrated. The residue was dissolved in ethyl acetate, washed with water, dried (MgSO 4 ), filtered, and concentrated.
  • Example 38 4- [( " 4-methylphenyl)thio]thieno [2,3 -c]pyridine-2-carboxylic acid, hydrazide Example 18 was processed as in Example 37 but substituting hydrazine for 3- amino- 1 ,2-propanediol to provide the title compound, mp 176-178 °C;
  • N- ⁇ -nitroarginine methyl ester hydrochloride and NaHCO3 were processed as in
  • Example 37 The residue was purified by flash chromotograpy on silica gel with 5% methanol/dichloromethane to provide the title compound. mp 84-87 °C; MS (DCI/NH3) m/z 517 (M+H) + ;
  • Example 40 N-(aminoiminomethyl)-4-[(4-methylphenyl)thio1thieno[2,3-c]pyridine-2-carboxamide
  • a solution of guanidine hydrochloride (0.095 g, 1 mmol) in methanol was treated with potassium t-butoxide (0.112 g, 1 mmol), stined at room temperature for 30 minutes, treated with Example 17 (0.1 g, 0.3 mmol), warmed to room temperature for 16 hours and concentrated.
  • the concentrate was dissolved in ethyl acetate (100 mL), washed with water, dried (MgSO 4 ), filtered, and concentrated.
  • the residue was purified by flash chromotograpy on silica gel with 6% methanol/dichloromethane to provide the title compound. mp 202-205 °C;
  • Example 42 4-[(4-methylphenyl)thio]thieno[2,3-c1pyridine Boiling Dowtherm A (2 mL) was treated sequentially with Example 18 (0.6 g, 1.99 mmol) and copper powder (0.3 g), stined for 5 minutes, cooled, diluted with hexanes, and purified by flash chromatography on silica gel with 15% ethyl acetate/hexanes. The product was then recrystallized from hexanes to provide the title compound. mp 94-95 °C; MS (DCI/NH3) m/z 258 (M+H) + ;
  • Example 43 methyl 4-[( " 2-methoxy-2-oxoethyl)thio]thieno[2,3-c]pyridine-2-carboxylate
  • Example 93 A was processed as in examples 17B and 17C, but substituting methyl thioglycolate for p-thiocresol in Example 17B to provide the title compound.
  • MS (DCI/NH3) m/z 298 (M+H) + ;
  • IH NMR 500 MHz, DMSO-d 6 ) ⁇ 3.59 (s, 3H), 3.94 (s, 3H), 4.04 (s, 2H), 8.14 (s, IH), 8.55 (s, lH), 9.27 (s, IH).
  • Example 44 4-[(2-amino-2-oxoethyl)thio]thieno[2.3-c]pyridine-2-carboxamide
  • Example 43 was dissolved in 2M methanolic ammonia and warmed to 45 °C in a sealed tube for 18 hours. The precipitate was filtered, washed with methanol-diethyl ether (1 :1) and dried under vacuum to provide the title compound.
  • Example 45 4-r(4-bromophenyl)thio]thieno[2.3-c]pyridine-2-carboxamide
  • Example 17A was processed as in examples 17B and 17C, and 44, but substituting 4-bromothiophenol for p-thiocresol in Example 17B to provide the title compound.
  • MS (DCI/NH3) m/z 365 (M+H) + ;
  • Example 46 4-(phenylthio)thieno[2.3-c]pyridine-2-carboxamide
  • Example 17A was processed as in examples 17B, 17C, and 44 but substituting thiophenol for p-thiocresol in Example 17B to provide the title compound.
  • MS (DCI NH3) m/z 287 (M+H) + ;
  • 'H NMR 300 MHz, DMSO-d 6 ) ⁇ 7.29-7.40 (m, 5H), 7.86 (br s, IH), 8.25 (s, IH), 8.46 (s, lH), 8.52 (br s, lH), 9.31 (s, IH);
  • Example 47 4-[[4-(trifluoromethyl)phenyl1thio1thieno[2,3-c1pyridine-2-carboxamide
  • Example 17A was processed as in examples 17B, 17C, and 44 but substituting , ⁇ , ⁇ -trifluorothiocresol for p-thiocresol in Example 17B to provide the title compound.
  • MS (DCI/NH3) m/z 355 (M+H) + ;
  • Example 48 4- [(2-methylphenyl thio]thieno [2.3 -clpyridine-2-carboxamide
  • Example 17A was processed as in examples 17B and 17C, and 44, but substituting 2-methylthiophenol for p-thiocresol in Example 17B. The residue was purified by column chromatography, eluting with 5% methanol in dichloromethane to provide the title compound, mp 170-172 °C;
  • Example 17A was processed as in examples 17B and 17C, and 44, but substituting
  • Example 50 4-[(3.4-dimethylphenyl thio]thieno[2.3-c]pyridine-2-carboxamide
  • Example 17A was processed as in examples 17B and 17C, and 44, but substituting 3,4-dimethylthiophenol for p-thiocresol in Example 17B. The residue was purified by flash chromatography with 5% methanol/dichloromethane to provide the title compound. mp 192-194 °C;
  • Example 51 4-[r3.5-dimethylphenyl)thiolthieno[2.3-c]pyridine-2-carboxamide
  • Example 17A was processed as in examples 17B and 17C, and 44, but substituting 3,5-dimethylthiophenol for p-thiocresol in Example 17B. The residue was purified by flash chromatography with 5% methanol /dichloromethane to provide the title compound, mp 177-179 °C;
  • Example 17A was processed as in examples 17B and 17C, and 44, but substituting
  • Example 53 4-[(2-methyl-3-furanyl ' )thio1thieno[2.3-c1pyridine-2-carboxamide
  • Example 17A was processed as in examples 17B and 17C, and 44, but substituting 2-methyl-3-furanthiol for p-thiocresol in Example 17B. The residue was purified by flash chromatography with 5% methanol/dichloromethane to provide the title compound. mp 236-239 °C (decomposes); MS (ESI) m z 291 (M+H) + ;

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Abstract

L'invention concerne des composés ayant la formule (I) utiles pour traiter l'inflammation. L'invention concerne également des compositions pharmaceutiques contenant des composés de la formule (I), ainsi que des méthodes d'inhibition/traitement de maladies inflammatoires chez un mammifère.
EP99931986A 1999-06-03 1999-06-28 Composes anti-inflammatoires inhibant l'adhesion cellulaire Withdrawn EP1181296A1 (fr)

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