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  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
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  • C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
  • C07D239/26—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
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  • C07D239/72—Quinazolines; Hydrogenated quinazolines
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  • C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
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  • 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
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  • C07D487/04—Ortho-condensed systems

Definitions

• This invention relates to compounds useful for the treatment of diseases and/or disorder associated with Retinoic acid receptor-related orphan receptors (RORs), and more particularly compounds that modulate the function of ROR ⁇ .
• RORs Retinoic acid receptor-related orphan receptors
• the invention also provides pharmaceutically acceptable compositions comprising compounds of the present invention and methods of using said compositions in the treatment of diseases and/or disorder associated with ROR ⁇ .
• Retinoid-related orphan receptors are transcription factors which belong to the steroid hormone nuclear receptor super family (Jetten & Joo, Adv. Dev. Biol. 16:313-355, 2006). Several nuclear receptors are still characterized as orphan receptors because the identification of ligands for these receptors is still elusive or controversial.
• the ROR family consists of three members, ROR alpha (ROR ⁇ ), ROR beta (ROR ⁇ ) and ROR gamma (ROR ⁇ ), each encoded by a separate gene (RORA, RORB and RORC, respectively).
• RORs contain four principal domains shared by the majority of nuclear receptors: an N-terminal A/B domain, a DNA-binding domain, a hinge domain, and a ligand binding domain. Each ROR gene generates several isoforms which differ only in their N-terminal A/B domain. Two isoforms of ROR ⁇ have been identified: ROR ⁇ 1 and ROR ⁇ t (also known as ROR ⁇ 2). ROR ⁇ is a term used to describe both ROR ⁇ 1 and/or ROR ⁇ t.
• naive T helper cells Upon activation by antigen-presenting cells naive T helper cells undergo clonal expansion and will ultimately differentiate in cytokine secreting effector T cells, such as Th1 and Th2 subtypes.
• cytokine secreting effector T cells such as Th1 and Th2 subtypes.
• Th1 and Th2 subtypes A third and distinct effector subset has been identified, which plays a key role in providing immunity to bacteria and fungi at mucosal surfaces (Kastelein, et al., Ann. Rev. Immunol. 25: 221-242, 2007).
• This effector T helper cell subset can be distinguished based on its ability to produce large quantities of IL-17A/F, IL-21 and IL-22, and is named Th17 (Miossec, et al., New Eng. J. Med. 361: 888-898, 2009).
• ROR ⁇ 1 is expressed in a variety of tissues including thymus, muscle, kidney and liver, while ROR ⁇ t is exclusively expressed in the cells of the immune system. ROR ⁇ t is highly expressed in Th17 cells (He, et al., Immunity 9: 797-806, 1998). Studies have shown that Th17 cells are one of the important drivers of the inflammatory process in tissue-specific autoimmunity (Steinman, J. Exp. Med. 205:1517-1522, 2008; Leung, et al., Cell. Mol. Immunol. 7: 182-189, 2010).
• Th17 cells are activated during the disease process and are responsible for recruiting other inflammatory cells types, especially neutrophils, to mediate pathology in the target tissues (Korn, et al., Ann. Rev. Immunol. 27:485-517, 2009).
• Th17 cells or their products have been shown to be associated with the pathology of a variety of human inflammatory and autoimmune disorders including multiple sclerosis, rheumatoid arthritis, psoriasis, Crohn's disease and asthma (Jetten, Nucl. Recept. Signal. 7: e003, 2009; Manel, et al., Nat. Immunol. 9:641-649, 2008).
• ROR ⁇ t was shown to play a crucial role in non-Th17 lymphoid cells.
• ROR ⁇ t was critically important in innate lymphoid cells expressing Thyl, SCA-1 and IL-23R proteins. Genetic disruption of ROR ⁇ in a mouse colitis model dependent on these innate lymphoid cells, prevented colitis development (Buonocore, et al., Nature 464: 1371-1375, 2010).
• ROR ⁇ t was shown to play a crucial role in other non-Th17 cells, such as mast cells (Hueber, et al., J Immunol. 184: 3336-3340, 2010).
• ROR ⁇ t deficient mice show very little Th17 cells.
• ROR ⁇ t deficiency resulted in amelioration of EAE.
• Inhibition of ROR ⁇ t may also be beneficial in other diseases, which are characterized by increased levels of Th17 cells and/or elevated levels of Th17 hallmark cytokines such as IL-17, IL-22 and IL-23.
• diseases are Kawasaki Disease (Jia, et al., Clin. Exp. Immunol. 162: 131-137, 2010) and Hashimoto's thyroiditis (Figueroa-Vega, et al., J Clin.Endocrinol.Metab. 95: 953-62, 2010).
• ROR ⁇ inverse agonist SR2211 is a cell-permeable piperazine containing biphenyl compound that binds directly to retinoic acid receptor related orphan receptor ⁇ (ROR ⁇ ) and acts as a highly selective, inverse agonist. It is reported to block the transcriptional activity of ROR ⁇ and suppress the synthesis of IL-17 in EL-4 murine lymphoma cell line. SR2211 exhibits only a minimal effect on ROR alpha and LXR alpha activity, indicating that the functional effect is due to selective inhibition of ROR ⁇ alone.
• Th17 cells The nature and relevance of Th17 cells in mouse models of cancer and human disease are known (Zou et al., Nature Reviews Immunology 10, 248-256 (April 2010)). Evidences suggest that the effector T cell subset is also involved in tumor immunology, thus giving a way to a new target for cancer therapy.
• ROR ⁇ plays in the pathogenesis of diseases
• ROR ⁇ plays in the pathogenesis of diseases
• compounds that modulate ROR ⁇ activity which can be used in the treatment of diseases mediated by ROR ⁇ .
• substituted tetrahydroquinolinone and related compounds that are useful as modulators of ROR-gamma activity.
• substituted tetrahydroquinolinone and related compounds and pharmaceutical compositions thereof which are useful as ROR ⁇ modulators.
• the present invention provides compounds of formula (I):
• the present invention relates to pharmaceutical compositions comprising a compound of formula (I), or a pharmaceutically acceptable salt or a stereoisomer thereof and processes for preparing such compositions.
• the present invention relates to the preparation of the compounds of formula (I).
• the present invention provides substituted tetrahydroquinolinone and related compounds which are useful for treatment of disease(s) or disorder(s) associated with Retinoic acid receptor-related orphan receptors (RORs), and more particularly compounds that modulate the function of ROR ⁇ .
• RORs Retinoic acid receptor-related orphan receptors
• the present invention relates to compounds of formula (I):
• the present invention relates to compounds of formula (I) or a pharmaceutically acceptable salt or a stereoisomer thereof, wherein,
• the present invention relates to compounds of formula (IA):
• the present invention relates to compounds of formula (IB):
• ring Het is monocyclic or bicyclic heterocyclic ring.
• the ring Het is pyridyl, pyridazinyl, pyridazinone, pyrimidinyl, pyrazinyl, pyrazolyl, imidazopyrazinyl, imidazopyridyl, pyrrolopyrazinyl, thienyl, benzodioxolyl, benzimidazolyl, imidazolyl, imidazopyridazinyl or tetrahydroisoquinolinonyl.
• the ring Het is pyrazinyl, pyridazinone, pyrazolyl, imidazopyridyl, pyrrolopyrazinyl, thienyl, benzodioxolyl, benzimidazolyl, imidazolyl or tetrahydroisoquinolinonyl.
• the ring Het is pyridyl
• the ring Het is pyridazinyl.
• the ring Het is pyrimidinyl.
• the ring Het is imidazopyrazinyl.
• the ring Het comprises its N-Oxides thereof.
• 0-2 of Y 1 , Y 2 and Y 3 are N.
• each Z 1 , Z 2 , Z 3 , Z 4 and Z 5 are CH.
• L is .—NHCOCH 2 — or .—CONHCH 2 — wherein the group marked with . is connected to the ring containing Y 1 , Y 2 and Y 3 .
• R 1 and R 2 are independently hydrogen.
• R 1 and R 2 are independently alkyl, in another embodiment the alkyl is C 1 -C 6 alkyl (e.g. methyl, ethyl or isopropyl).
• R 1 is hydrogen and R 2 is alkyl, in another embodiment the alkyl is C 1 -C 6 alkyl (e.g. methyl).
• R 3 is alkoxy, in another embodiment the alkoxy is methoxy or isopropyloxy.
• R 3 is haloalkyl, in another embodiment the haloalkyl is —CF 3 .
• R 3 is hydroxy.
• R 3 is alkyl, in another embodiment the alkyl is C 1 -C 6 alkyl (e.g. methyl, ethyl or isopropyl).
• R 3 is halo, in another embodiment the halo is —F or —Cl.
• R 3 is haloalkyloxy, in another embodiment the haloalkyloxy is —OCF 3 .
• R 3 is cycloalkyl, in another embodiment the cycloalkyl is cyclopropyl.
• R 4 is alkyl, in another embodiment the alkyl is C 1 -C 6 alkyl (e.g. —CH 3 or —C 2 H 5 ).
• R 4 is hydrogen
• R 5 is alkyl, in another embodiment the alkyl is C 1 -C 6 alkyl (e.g. —CH 3 or —C 2 H 5 ).
• R a is hydrogen
• R a is alkyl, in another embodiment the alkyl is C 1 -C 6 alkyl (e.g. methyl or ethyl).
• R a is halo, in another embodiment the halo is fluoro.
• R 6 and R 7 are independently hydrogen.
• m is 1 or 2.
• the present invention provides a compound selected from the group consisting of:
• the compounds of the present invention can also contain unnatural proportions of atomic isotopes at one or more of the atoms that constitute such compounds.
• the present invention also embraces isotopically-labeled variants of the present invention which are identical to those recited herein, but for the fact that one or more atoms of the compound are replaced by an atom having the atomic mass or mass number different from the predominant atomic mass or mass number usually found in nature for the atom. All isotopes of any particular atom or element as specified are contemplated within the scope of the compounds of the invention, and their uses.
• Exemplary isotopes that can be incorporated in to compounds of the invention include isotopes of hydrogen, carbon, nitrogen, oxygen, phosphorous, sulfur, fluorine, chlorine and iodine, such as 2 H (“D”), 3 H, 11 C, 13 C, 14 C, 13 N, 15 N, 15 O, 17 O, 18 O, 32 P, 33 P, 35 S, 18 F, 36 Cl, 123 I and 125 I.
• Isotopically labeled compounds of the present inventions can generally be prepared by following procedures analogous to those disclosed in the schemes and/or in the examples herein below, by substituting an isotopically labeled reagent for a non-isotopically labeled reagent.
• the present invention also provides a pharmaceutical composition that includes at least one compound described herein and at least one pharmaceutically acceptable excipient (such as a pharmaceutically acceptable carrier or diluent).
• the pharmaceutical composition comprises a therapeutically effective amount of at least one compound described herein.
• the compounds described in the present invention may be associated with a pharmaceutically acceptable excipient (such as a carrier or a diluent) or be diluted by a carrier, or enclosed within a carrier which can be in the form of a capsule, sachet, paper or other container.
• the compounds and pharmaceutical compositions of the present invention are useful for modulating the activity of ROR ⁇ , which is believed to be related to a variety of disease states.
• the present invention further provides a method of modulating the function of ROR ⁇ in a subject in need thereof by administering to the subject one or more compounds described herein in the amount effective to cause inhibition of such receptor.
• the compounds of the invention are typically administered in the form of a pharmaceutical composition.
• Such compositions can be prepared using procedures well known in the pharmaceutical art and comprise at least one compound of the invention.
• the pharmaceutical composition of the present invention comprises one or more compounds described herein and one or more pharmaceutically acceptable excipients.
• the pharmaceutically acceptable excipients are approved by regulatory authorities or are generally regarded as safe for human or animal use.
• the pharmaceutically acceptable excipients include, but are not limited to, carriers, diluents, glidants and lubricants, preservatives, buffering agents, chelating agents, polymers, gelling agents, viscosifying agents, solvents and the like.
• suitable carriers include, but are not limited to, water, salt solutions, alcohols, polyethylene glycols, peanut oil, olive oil, gelatin, lactose, terra alba, sucrose, dextrin, magnesium carbonate, sugar, amylose, magnesium stearate, talc, gelatin, agar, pectin, acacia, stearic acid, lower alkyl ethers of cellulose, silicic acid, fatty acids, fatty acid amines, fatty acid monoglycerides and diglycerides, fatty acid esters and polyoxyethylene.
• the pharmaceutical composition may also include one or more pharmaceutically acceptable auxiliary agents, wetting agents, suspending agents, preserving agents, buffers, sweetening agents, flavouring agents, colorants or any combination of the foregoing.
• compositions may be in conventional forms, for example, tablets, capsules, solutions, suspensions, injectables or products for topical application. Further, the pharmaceutical composition of the present invention may be formulated so as to provide desired release profile.
• Administration of the compounds of the invention, in pure form or in an appropriate pharmaceutical composition can be carried out using any of the accepted routes of administration of pharmaceutical compositions.
• the route of administration may be any route which effectively transports the active compound of the patent application to the appropriate or desired site of action.
• Suitable routes of administration include, but are not limited to, oral, nasal, buccal, dermal, intradermal, transdermal, parenteral, rectal, subcutaneous, intravenous, intraurethral, intramuscular or topical.
• Solid oral formulations include, but are not limited to, tablets, capsules (soft or hard gelatin), dragees (containing the active ingredient in powder or pellet form), troches and lozenges.
• Liquid formulations include, but are not limited to, syrups, emulsions, and sterile injectable liquids, such as suspensions or solutions.
• Topical dosage forms of the compounds include ointments, pastes, creams, lotions, powders, solutions, eye or ear drops, impregnated dressings, and may contain appropriate conventional additives such as preservatives, solvents to assist drug penetration.
• compositions of the present patent application may be prepared by conventional techniques known in literature.
• Suitable doses of the compounds for use in treating the diseases or disorders described herein can be determined by those skilled in the relevant art.
• Therapeutic doses are generally identified through a dose ranging study in humans based on preliminary evidence derived from the animal studies. Doses must be sufficient to result in a desired therapeutic benefit without causing unwanted side effects. Mode of administration, dosage forms, and suitable pharmaceutical excipients can also be well used and adjusted by those skilled in the art. All changes and modifications are envisioned within the scope of the present patent application.
• Compounds of the present invention are particularly useful because they may modulate the activity of Retinoid-related orphan receptor gamma (ROR ⁇ ), i.e., they prevent, inhibit, or suppress the action of ROR ⁇ , and/or may elicit ROR ⁇ modulating effect.
• ROR ⁇ Retinoid-related orphan receptor gamma
• Compounds of the invention are thus useful in the treatment of those conditions in which inhibition of a ROR gamma activity is required.
• the present invention provides a method of treating a ROR ⁇ mediated disorder or disease in a subject comprising administering to a subject in need thereof a compound of the present invention.
• the present invention provides a method comprising conjointly administering to the subject a second therapeutic agent.
• the present invention provides a method of reducing amount of IL-17 and other effector cytokines of Th17 cells in a subject, comprising administering to the subject a compound of the present invention.
• one embodiment of the invention provides a method of treating a disorder or disease selected from the group consisting of immune or inflammatory disorder or disease.
• the method comprises administering a therapeutically effective amount of a compound of the present invention, to a subject in need thereof to ameliorate a symptom of a ROR ⁇ mediated disorder or disease.
• the disorder or disease is an immune disorder or disease.
• the disorder or disease is an inflammatory disorder or disease.
• the disorder or disease is an autoimmune disorder or disease.
• the disorder or disease is rheumatoid arthritis, psoriasis, chronic graft-versus-host disease, acute graft-versus-host disease, Crohn's disease, inflammatory bowel disease, multiple sclerosis, systemic lupus erythematosus, Celiac Sprue, idiopathic thrombocytopenic thrombotic purpura, myasthenia gravis, Sjogren's syndrome, asthma, epidermal hyperplasia, scleroderma or ulcerative colitis.
• the disorder or disease is cartilage inflammation, bone degradation, arthritis, juvenile arthritis, juvenile rheumatoid arthritis, pauciarticular juvenile rheumatoid arthritis, polyarticular juvenile rheumatoid arthritis, systemic onset juvenile rheumatoid arthritis, juvenile ankylosing spondylitis, juvenile enteropathic arthritis, juvenile reactive arthritis, juvenile Reter's Syndrome, SEA Syndrome, juvenile dermatomyositis, juvenile psoriatic arthritis, juvenile scleroderma, juvenile systemic lupus erythematosus, juvenile vasculitis, pauciarticular rheumatoid arthritis, polyarticular rheumatoid arthritis, systemic onset rheumatoid arthritis, ankylosing spondylitis, enteropathic arthritis, reactive arthritis, Reter's Syndrome, dermatomyositis, psoriatic arthritis, vasculitis, myolitis, polymyolitis, dermatomyolitis, dermatom
• the psoriasis is plaque psoriasis, guttate psoriasis, inverse psoriasis, pustular psoriasis or erythrodermic psoriasis.
• the disorder or disease is rheumatoid arthritis.
• the subject is a mammal, e.g., a human.
• the present invention provides compounds for use as a medicament.
• the invention provides the use of the compounds of the present invention in the manufacture of a medicament.
• the invention provides the use of the compounds of the present invention in the manufacture of a medicament for the treatment of an immune disorder or an inflammatory disorder or disease.
• the present invention provides compounds for use as a medicament.
• the medicament is for treating a disease or disorder mediated by ROR ⁇ .
• the present invention provides compounds for use as a medicament for the treatment of an immune or an inflammatory disorder or disease.
• the compounds of the present invention can inhibit the activity of ROR ⁇ . Accordingly, another embodiment of the invention provides a method of inhibiting the activity of ROR ⁇ . The method comprises exposing a ROR ⁇ to an effective amount of a compound of the present invention to inhibit said ROR ⁇ .
• the compounds of the present invention can reduce the amount of interleukin-17 (IL-17) and other effector cytokines of Th17 cells, in a subject.
• IL-17 is a cytokine that affects numerous biological functions, including inducing and mediating pro-inflammatory responses.
• another aspect of the invention provides a method of reducing the amount of IL-17 and other effector cytokines of Th17 cells, in a subject. The method comprises administering to a subject an effective amount of a compound of the present invention to reduce the amount of IL-17 and other effector cytokines of Th17 cells, in the subject.
• administering the compound reduces the amount of IL-17 and other effector cytokines produced by Th17 cells, in the subject.
• a change in the amount of IL-17 and other effector cytokines produced by, for example, Th17 cells can be measured using procedures described in the literature, such as an ELISA assay or intracellular staining assay.
• compound of the present invention may inhibit the synthesis of IL-17 and other effector cytokines of Th17 cells, in a subject.
• another aspect of the invention provides a method of inhibiting the synthesis of IL-17 and other effector cytokines of Th17 cells, in a subject.
• the method comprises administering to a subject an effective amount of a compound of the present invention to inhibit the synthesis of IL-17 and other effector cytokines of Th17 cells, in the subject.
• the subject is a human.
• the method(s) of treatment of the present patent application comprise administering a safe and effective amount of a compound according to formula (I) or a pharmaceutically acceptable salt thereof to a patient (particularly a human) in need thereof.
• the term ‘compound(s)’ comprises the compounds disclosed in the present invention.
• the term ‘compound(s)’ comprises the compounds of formula (I), or a pharmaceutically acceptable salt or a stereoisomer thereof.
• the term “optionally substituted” refers to the replacement of one or more hydrogen radicals in a given structure with the radical of a specified substituent including, but not limited to: halo, alkyl, alkenyl, alkynyl, aryl, heterocyclyl, thiol, alkylthio, arylthio, alkylthioalkyl, arylthioalkyl, alkylsulfonyl, alkylsulfonylalkyl, arylsulfonylalkyl, alkoxy, aryloxy, aralkoxy, aminocarbonyl, alkylaminocarbonyl, arylaminocarbonyl, alkoxycarbonyl, aryloxycarbonyl, haloalkyl, amino, trifluoromethyl, cyano, nitro, alkylamino, arylamino, alkylaminoalkyl, arylaminoalkyl, aminoalkylamin
• alkyl refers to a hydrocarbon chain radical that includes solely carbon and hydrogen atoms in the backbone, containing no unsaturation, and which is attached to the rest of the molecule by a single bond.
• the alkane radical may be straight or branched.
• C 1 -C 6 alkyl refers to a monovalent, straight, or branched aliphatic group containing 1 to 6 carbon atoms (e.g., methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, s-butyl, t-butyl, n-pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, neo-pentyl, 3,3-dimethylpropyl, hexyl, 2-methylpentyl, and the like).
• alkenyl refers to an aliphatic group containing at least one double bond and is intended to include both “unsubstituted alkenyls” and “substituted alkenyls”, the latter of which refers to alkenyl moieties having substituents replacing a hydrogen on one or more carbons of the alkenyl group.
• alkenyl groups are, but not limited to, ethenyl, 1-propenyl, 2-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl and isobutenyl.
• the substituents may occur on one or more carbons that are included or not included in one or more double bonds.
• substituents include all those contemplated for alkyl groups, as discussed below, except where stability is prohibitive.
• substitution of alkenyl groups by one or more alkyl, carbocyclyl, aryl, heterocyclyl or heteroaryl groups is contemplated.
• alkynyl refers to an aliphatic group containing at least one triple bond and is intended to include both “unsubstituted alkynyls” and “substituted alkynyls”, the latter of which refers to alkynyl moieties having substituents replacing a hydrogen on one or more carbons of the alkynyl group.
• alkynyl groups are, but not limited to, ethynyl, propyn-1-yl or propyn-2-yl.
• the substituents may occur on one or more carbons that are included or not included in one or more triple bonds.
• substituents include all those contemplated for alkyl groups, as discussed above, except where stability is prohibitive.
• substitution of alkynyl groups by one or more alkyl, carbocyclyl, aryl, heterocyclyl or heteroaryl groups is contemplated.
• alkoxy refers the radical —O-alkyl, wherein the alkyl is as defined above.
• Representative examples of alkoxy include, but are not limited to, methoxy, ethoxy, propoxy, 2-propoxy, butoxy, tert-butoxy, pentyloxy, hexyloxy and heptyloxy.
• the alkyl portion of the alkoxy may be optionally substituted.
• alkoxyalkyl refers the radical -alkyl-O-alkyl, wherein the alkyl group is further substituted by alkoxy.
• Representative examples of alkoxyalkyl include, but are not limited to, methoxymethyl, methoxyethyl, ethoxymethyl, isopropoxymethyl and ethoxy ethyl.
• aryl alone or in combination with other term(s) means a carbocyclic aromatic system containing one or more rings wherein such rings may be fused.
• fused means that the second ring is attached or formed by having two adjacent atoms in common with the first ring.
• fused is equivalent to the term “condensed”.
• an aryl group typically has from 6 to about 14 carbon atoms but the invention is not limited in that respect.
• (C 6 -C 12 ) aryl refers to an aryl group having six to twelve carbon atoms. Examples of aryl groups include but are not limited to phenyl, naphthyl, indanyl, and the like. Unless otherwise specified, all aryl groups described herein may be optionally substituted.
• cycloalkyl refers to C 3 -C 10 saturated cyclic hydrocarbon ring.
• a cycloalkyl may be a single ring, which typically contains from 3 to 7 carbon ring atoms. Examples of single-ring cycloalkyls include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and the like.
• a cycloalkyl may alternatively be polycyclic or contain more than one ring. Examples of polycyclic cycloalkyls include bridged, fused, and spirocyclic carbocyclyls.
• halo or halogen alone or in combination with other term(s) means fluorine, chlorine, bromine or iodine.
• haloalkyl means alkyl substituted with one or more halogen atoms, wherein the alkyl groups are as defined above.
• halo is used herein interchangeably with the term “halogen” means F, Cl, Br or I.
• haloalkyl include but are not limited to fluoromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trifluoroethyl and the like.
• haloalkoxy refers the radical —O-haloalkyl, wherein the haloalkyl is as defined above.
• Representative examples of haloalkoxy include, but are not limited to, fluoromethoxy, trifluoromethoxy and 2-fluoroethoxy.
• aminoalkyl refers to an alkyl group substituted with an amino group.
• hydroxyalkyl refers to an alkyl as defined above, having one or more of the available hydrogen of the alkyl replaced by a hydroxyl group.
• a hydroxyalkyl includes, but are not limited to, —CH 2 CH 2 OH, —CH 2 CH 2 CH 2 OH and —C(OH)(CH 3 )(CH 3 ).
• heterocyclyl includes definitions of “heterocycloalkyl” and “heteroaryl”.
• the heterocyclyl may be attached to the main structure at any heteroatom or carbon atom that results in the creation of a stable structure. Unless set forth or recited to the contrary, all heterocyclyl groups described or claimed herein may be substituted or unsubstituted.
• heterocycloalkyl refers to a non-aromatic, saturated or partially saturated, monocyclic or polycyclic ring system of 3 to 15 members having at least one heteroatom or heterogroup selected from O, N, S, S(O), S(O) 2 , NH or C(O) with the remaining ring atoms being independently selected from the group consisting of carbon, oxygen, nitrogen and sulfur.
• Heterocycloalkyl include, but are not limited to azetidinyl, oxetanyl, imidazolidinyl, benzodioxolyl, tetrahydroisoquinolinonyl, pyrrolidinyl, oxazolidinyl, thiazolidinyl, pyrazolidinyl, tetrahydrofuranyl, piperidinyl, piperazinyl, tetrahydropyranyl, morpholinyl, thiomorpholinyl, 1,4-dioxanyl, dioxidothiomorpholinyl, oxapiperazinyl, oxapiperidinyl, tetrahydrofuryl, tetrahydropyranyl, tetrahydrothiophenyl, dihydropyranyl, indolinyl, indolinylmethyl, azepanyl, 2-aza-bicyclo[2.2.2]
• heteroaryl refers to an aromatic heterocyclic ring system containing 5 to 20 ring atoms, suitably 5 to 10 ring atoms, which may be a single ring (monocyclic) or multiple rings (bicyclic, tricyclic or polycyclic) fused together or linked covalently.
• the rings may contain from 1 to 5 heteroatoms selected from N, O and S, wherein the N or S atom is optionally oxidized, or the N atom is optionally quarternized. Any suitable ring position of the heteroaryl moiety may be covalently linked to the defined chemical structure.
• heteroaryl examples include, but are not limited to oxazolyl, isoxazolyl, imidazolyl, furyl, indolyl, isoindolyl, pyrrolyl, triazolyl, triazinyl, tetrazoyl, thienyl, oxadiazolyl, thiazolyl, isothiazolyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, pyridazinone, imidazopyrazinyl, imidazopyridyl, pyrrolopyrazinyl, tetrahydroi soquinolinonyl, pyrazolyl, benzofuranyl, benzothiazolyl, benzoxazolyl, benzimidazolyl, benzothienyl, benzopyranyl, carbazolyl, quinolinyl, isoquinolinyl, quinazoliny
• salts prepared from pharmaceutically acceptable bases or acids including inorganic or organic bases and inorganic or organic acids include, but are not limited to, acetate, benzenesulfonate, benzoate, bicarbonate, bisulfate, bitartrate, borate, bromide, camsylate, carbonate, chloride, citrate, clavulanate, dihydrochloride, edetate, edisylate, estolate, esylate, fumarate, gluceptate, gluconate, glutamate, glycollylarsanilate, hexylresorcinate, hydrabamine, hydrobromide, hydrochloride, hydroxynaphthoate, iodide, isothionate, lactate, lactobionate, laurate, malate, maleate, mandelate, mesylate, methylbromide, methylnitrate, methylsulf
• the term “pharmaceutically acceptable carrier” refers to any of the standard pharmaceutical carriers, such as a phosphate buffered saline solution, water, emulsions ⁇ e.g., such as an oil/water or water/oil emulsions), and various types of wetting agents.
• the compositions also can include stabilizers and preservatives.
• stabilizers and adjuvants known in literature.
• stereoisomers refers to any enantiomers, diastereoisomers, or geometrical isomers of the compounds of formula (I), wherever they are chiral or when they bear one or more double bond.
• the compounds of the formula (I) and related formulae are chiral, they can exist in racemic or in optically active form. Since the pharmaceutical activity of the racemates or stereoisomers of the compounds according to the invention may differ, it may be desirable to use the enantiomers. In these cases, the end product or even the intermediates can be separated into enantiomeric compounds by chemical or physical measures known to the person skilled in the art or even employed as such in the synthesis.
• SEA Syndrome refers to Seronegative Enthesopathy and Arthropathy Syndrome.
• treating or “treatment” of a state, disorder or condition includes: (a) preventing or delaying the appearance of clinical symptoms of the state, disorder or condition developing in a subject that may be afflicted with or predisposed to the state, disorder or condition but does not yet experience or display clinical or subclinical symptoms of the state, disorder or condition; (b) inhibiting the state, disorder or condition, i.e., arresting or reducing the development of the disease or at least one clinical or subclinical symptom thereof; or (c) relieving the disease, i.e., causing regression of the state, disorder or condition or at least one of its clinical or subclinical symptoms.
• subject includes mammals (especially humans) and other animals, such as domestic animals (e.g., household pets including cats and dogs) and non-domestic animals (such as wildlife).
• domestic animals e.g., household pets including cats and dogs
• non-domestic animals such as wildlife.
• the term “therapeutically effective amount” means the amount of a compound that, when administered to a subject for treating a state, disorder or condition, is sufficient to effect such treatment.
• the “therapeutically effective amount” will vary depending on the compound, the disease and its severity and the age, weight, physical condition and responsiveness of the subject to be treated.
• composition is intended to encompass a product comprising the specified ingredients in the specified amounts, as well as any product which results, directly or indirectly, from combination of the specified ingredients in the specified amounts.
• pharmaceutically acceptable it is meant the carrier, diluent or excipient must be compatible with the other ingredients of the formulation and not deleterious to the recipient thereof.
• work-up includes distribution of the reaction mixture between the organic and aqueous phase indicated within parentheses, separation of layers and drying the organic layer over sodium sulphate, filtration and evaporation of the solvent.
• Purification includes purification by silica gel chromatographic techniques, generally using ethyl acetate/hexane mixture of a suitable polarity as the mobile phase. Use of a different eluent system is indicated within parentheses.
• Step-iii ethyl 2-(4-(ethylthio)phenyl)acetate
• Step-ii Synthesis of 2,2,2-trichloro-1-(1-(2,2-diethoxyethyl)-1H-pyrrol-2-yl)ethan-1-one
• Step-ii Synthesis of tert-butyl 2-cyano-2-(5-(ethylthio)pyridin-2-yl)acetate
• Step-iii Synthesis of 2-(5-(ethylthio)pyridin-2-yl)acetonitrile
• Step-ii Synthesis of 6-bromo-3-methoxy-4-methylpyridazine and 3-bromo-6-methoxy-4-methylpyridazine
• Step i Synthesis of 1-((3-chloropyrazin-2-yl)amino)propan-2-ol
• Step ii Synthesis of 1-((3-chloropyrazin-2-yl)amino)propan-2-one
• Step-iii Synthesis of 8-chloro-3-(trifluoromethyl)imidazo[1,2-a]pyrazine
• Step-ii Synthesis of Step-ii: Synthesis of 3-cyclopropylimidazo[1,2-a]pyrazin-8-ol
• 3-cyclopropyl-8-methoxyimidazo[1,2-a]pyrazine (1.2 g, 6.0 mmol) was dissolved in 48% HBr in water (10 mL) and stirred at 60° C. for 2 h. The volatiles were evaporated under reduced pressure to get the residue. The residue was azeotroped with toluene to get 3-cyclopropylimidazo[1,2-a]pyrazin-8-ol (1.0 g, 91%).
• Step-iii Synthesis of 8-chloro-3-cyclopropylimidazo[1,2-a]pyrazine
• Step-i Synthesis of methyl 2,5-dioxo-1,2,5,6,7,8-hexahydroquinoline-3-carboxylate
• Step-ii Synthesis of 2,5-dioxo-1,2,5,6,7,8-hexahydroquinoline-3-carboxylic acid
• Step-iii Synthesis of 7,8-dihydroquinoline-2,5(1H,6H)-dione 2,5-dioxo-1,2,5,6,7,8-hexahydroquinoline-3-carboxylic acid (8.5 g, 41 mmol) was taken in an RB fitted with a condenser was heated on a heating mantle till it melts. Then the molten reaction mixture was cooled to room temperature, dissolved in 10% methanol in DCM. This solution was filtered and the filtrate was concentrated to get the title compound (5 g, 74.7%). LC-MS: 164.0 [M+H] + .
• Step-ii Synthesis of 3-hydroxy-8-oxo-5,6,7,8-tetrahydroisoquinoline-4-carboxylic acid
• This intermediate was prepared according to the protocol described in the synthesis of Intermediate-36 with appropriate variations in reactants, quantities of reagents, solvents and reaction conditions.
• Step-ii Synthesis of 2-chloro-6-(6-methoxypyridin-3-yl)-6-methyl-7,8-dihydroquinolin-5(6H)-one
• Step-ii 2-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)-7,8-dihydroquinolin-5(6H)-one
• Step-iii 2-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)-6-methyl-7,8-dihydroquinolin-5(6H)-one
• Step-i Synthesis of 2-chloro-6-(6-hydroxypyridazin-3-yl)-4,6-dimethyl-7,8-dihydro quinolin-5(6H)-one
• Step-ii Synthesis of 2-chloro-4,6-dimethyl-6-(1-methyl-6-oxo-1,6-dihydropyridazin-3-yl)-7,8-dihydroquinolin-5(6H)-one
• the present invention is further exemplified, but not limited, by the following examples that illustrate the preparation of compounds according to the invention.
• Step-i Synthesis of 2-(4-(ethylsulfonyl)phenyl)-N-(6-(2-((4-methoxybenzyl)oxy)pyridin-3-yl)-4,6-dimethyl-5-oxo-5,6,7,8-tetrahydroquinolin-2-yl)acetamide
• Step-ii Synthesis of 2-(4-(ethylsulfonyl)phenyl)-N-(6-(2-hydroxypyridin-3-yl)-4,6-dimethyl-5-oxo-5,6,7,8-tetrahydroquinolin-2-yl)acetamide
• Step-iii Synthesis of 6-(5-chloroimidazo[1,2-a]pyrazin-8-yl)-2-methoxy-6-methyl-7,8-dihydroquinolin-5(6H)-one
• Step-v Synthesis of 6-(5-chloroimidazo[1,2-a]pyrazin-8-yl)-6-methyl-5-oxo-5,6,7,8-tetrahydro quinolin-2-yl trifluoromethanesulfonate
• Step-vi Synthesis of N-(6-(5-chloroimidazo[1,2-a]pyrazin-8-yl)-6-methyl-5-oxo-5,6,7,8-tetrahydroquinolin-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide
• 6-(5-chloroimidazo[1,2-a]pyrazin-8-yl)-6-methytl-5-oxo-5,6,7,8-tetrahydroquinolin-2-yl trifluoromethanesulfonate was coupled using the same protocol as explained in Example-1.
• This compound was prepared by procedure similar to the one described in Example-3 with appropriate variations in reactants, quantities of reagents, solvents and reaction conditions.
• Step-i Synthesis of 2-amino-6-(6-hydroxypyridazin-3-yl)-4,6-dimethyl-7,8-dihydroquinolin-5(6H)-one
• Step-ii Synthesis of 2-amino-6-(6-chloropyridazin-3-yl)-4,6-dimethyl-7,8-dihydro quinolin-5(6H)-one
• Step-iii Synthesis of 2-amino-6-(6-(dimethylamino)pyridazin-3-yl)-4,6-dimethyl-7,8-dihydroquinolin-5(6H)-one
• Step-iv N-(6-(6-(dimethylamino)pyridazin-3-yl)-4,6-dimethyl-5-oxo-5,6,7,8-tetrahydro quinolin-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide
• the reaction mixture was washed with water.
• the organic layer was washed with brine, dried over anhydrous sodium sulfate and evaporated under reduced pressure to get the crude product.
• the crude product was purified by flash column chromatography (50-100% ethyl acetate in hexane) to get N-(6-(6-(dimethylamino)pyridazin-3-yl)-4,6-dimethyl-5-oxo-5,6,7,8-tetrahydroquinolin-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (0.04 g, 30%).
• Step-ii 6-(2,6-dimethylpyrimidin-4-yl)-6-methyl-5-oxo-5,6,7,8-tetrahydroquinoline-2-carboxylic acid
• Step-iii 6-(2,6-dimethylpyrimidin-4-yl)-N-(4-(ethylsulfonyl)benzyl)-6-methyl-5-oxo-5,6,7,8-tetrahydroquinoline-2-carboxamide
• the organic layer was washed with brine, dried over anhydrous sodium sulfate and evaporated under reduced pressure to get the crude product.
• the crude product was purified by flash column chromatography (0-2% methanol in chloroform) to get 6-(2,6-dimethylpyrimidin-4-yl)-N-(4-(ethylsulfonyl)benzyl)-6-methyl-5-oxo-5,6,7,8-tetrahydroquinoline-2-carboxamide (0.11 g, 32%).
• Step-ii Synthesis of 2-(2,6-dimethylpyrimidin-4-yl)-6-methoxy-2-methyl-3,4-dihydronaphthalen-1(2H)-one
• Step-iii Synthesis of 2-(2,6-dimethylpyrimidin-4-yl)-6-hydroxy-2-methyl-3,4-dihydronaphthalen-1(2H)-one
• Step-v Synthesis of N-(6-(2,6-dimethylpyrimidin-4-yl)-6-methyl-5-oxo-5,6,7,8-tetrahydronaphthalen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide
• reaction mixture was purged with nitrogen for 15 min and then heated to 100° C. for 12 h.
• the reaction was quenched with ice water, extracted with ethyl acetate. The organic portion was dried over anhydrous sodium sulphate, filtered and concentrated to get the title compound (0.06 g, 12.6%).
• Enantiomeric mixture of 2-(4-(ethylsulfonyl)phenyl)-N-(6-(3-hydroxypyridin-2-yl)-4,6-dimethyl-5-oxo-5,6,7,8-tetrahydroquinolin-2-yl)acetamide was separated by chiral preparative HPLC to obtain two separated enantiomers (Isomer-1, Compound-101 & Isomer-2, Compound-102).
• Step-i Synthesis of methyl 7-(2,6-dimethylpyrimidin-4-yl)-7-methyl-8-oxo-5,6,7,8-tetrahydroisoquinoline-3-carboxylate
• Step-ii Synthesis of 7-(2,6-dimethylpyrimidin-4-yl)-7-methyl-8-oxo-5,6,7,8-tetrahydroisoquinoline-3-carboxylic acid
• Step-iii Synthesis of 7-(2,6-dimethylpyrimidin-4-yl)-N-(4-(ethylsulfonyl)benzyl)-7-methyl-8-oxo-5,6,7,8-tetrahydroisoquinoline-3-carboxamide
• ROR gamma radioligand binding was performed using 3 H 25-Hydroxycholesterol in a competitive displacement assay using dextran charcoal method.
• 5 nM 3 H 25-Hydroxycholesterol with 300 ng ROR ⁇ LBD (in house expressed in E.coli ) along with the compound were incubated in the binding buffer (50 mM HEPES, pH 7.5, 150 mM NaCl, 0.01% BSA and 5 mM MgCl 2 ) for 30 min at room temperature.
• dextran-charcoal mixture (0.5% charcoal: 0.05% dextran
• Dose response curves were generated for 10 compound concentrations using GraphPad Prism software Version 5 (San Diego, Calif., USA) using non-linear regression curve fit for sigmoidal dose response (variable slope).
• the Ligand Binding Domain (LBD) of ROR gamma was cloned into pFN26A (BIND) hRluc-neo Flexi vector (Promega) which expresses a fusion protein comprised of a DNA binding domain of the yeast GAL4 gene, a linker segment and ROR gamma ligand binding domain.
• BIND pFN26A
• hRluc-neo Flexi vector Promega
• the selected compounds were screened at 1 ⁇ M/10 ⁇ M concentration followed by IC 50 measurement and the results are summarized in the Table-1 below along with IC 50 (nM) details for selected compounds.
• the IC 50 values of the selected compounds are set forth in below table wherein “A” refers to an IC 50 value of less than 150 nM, “B” refers to an IC 50 value in a range of 150-300 nM and C refers to an IC 50 value of greater than 300 nM.
• ROR ⁇ ligand binding assay binding assay: ROR ⁇ ligand Compound % inhibition % inhibition @ binding assay: No. @1 ⁇ M 10 ⁇ M IC 50 (nM) 2 84 89 A 6 72 96 B 7 91 100 A 9 90 100 A 11 25 71 — 12 — — A 14 0 26 — 15 95 92 A 16 86 93 B 17 92 96 — 19 98 98 B 20 76 95 — 21 94 92 B 22 76 95 A 26 65 99 C 28 77 100 B 29 84 91 B 31 90 88 A 34 74 97 C 35 80 98 B 40 44 88 — 41 47 82 — 42 94 92 A 43 82 — A 45 66 73 — 46 56 92 C 47 82 98 A 49 93 82 B 50 91 90 A 56 96 94 A 61 90 74 A 62 96 91 A 84
• IC 50 values of ROR ⁇ luciferase reporter assay for selected compounds are set forth in the Table-2 below wherein “A” refers to an IC 50 value of less than 100 nM, “B” refers to an IC 50 value in a range of 100-500 nM and C refers to an IC 50 value of greater than 500 nM.
• ROR ⁇ luciferase Reporter assay IC 50 (nM) (in range) Compound No. A 15, 16, 17, 21, 29, 31, 45, 51, 52, 56, 64, 65, 66, 72, 74, 81, 105, 110, 113, 115, 118, 120, 125 and 129. B 2, 6, 7, 9, 12, 20, 22, 26, 28, 35, 49, 50, 58, 60, 68, 71, 75, 76, 77, 78, 83, 92, 96, 98, 104, 107, 112, 124 and 134.

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