Classifications

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  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
  • C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
  • C07D487/04—Ortho-condensed systems
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
  • A61K31/4353—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems
  • A61K31/437—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system containing a five-membered ring having nitrogen as a ring hetero atom, e.g. indolizine, beta-carboline
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
  • A61K31/519—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with heterocyclic rings
  • A61K31/52—Purines, e.g. adenine
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
  • A61P1/04—Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P37/00—Drugs for immunological or allergic disorders
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P37/00—Drugs for immunological or allergic disorders
  • A61P37/02—Immunomodulators
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P37/00—Drugs for immunological or allergic disorders
  • A61P37/02—Immunomodulators
  • A61P37/06—Immunosuppressants, e.g. drugs for graft rejection
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
• • 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
  • C07D473/00—Heterocyclic compounds containing purine ring systems
  • C07D473/26—Heterocyclic compounds containing purine ring systems with an oxygen, sulphur, or nitrogen atom directly attached in position 2 or 6, but not in both
  • C07D473/32—Nitrogen atom
  • C07D473/34—Nitrogen atom attached in position 6, e.g. adenine

Definitions

• This invention relates to compounds useful in the modulation of IL-12, IL-23 and/or IFNa by acting on Tyk-2 to cause signal transduction inhibition.
• substituted heterobicyclic compounds compositions comprising such compounds, and methods of their use.
• the invention further pertains to pharmaceutical compositions containing at least one compound according to the invention that are useful for the treatment of conditions related to the modulation of IL-12, IL-23 and/or IFNa in a mammal.
• the heterodimeric cytokines interleukin IL-12 and IL-23 which share a common p40 subunit, are produced by activated antigen-presenting cells and are critical in the differentiation and proliferation of Thl and Thl 7 cells, two effector T cell lineages which play key roles in autoimmunity.
• IL-23 is composed of the p40 subunit along with a unique pl9 subunit.
• IL-23, acting through a heterodimeric receptor composed of IL-23R and IL-12R i is essential for the survival and expansion of Thl7 cells which produce pro-inflammatory cytokines such as IL-17A, IL-17F, IL-6 and TNF-a (McGeachy, M.J. et al, "The link between IL-23 and Thl7 cell-mediated immune pathologies", Semin. Immunol, 19:372-376 (2007)).
• pro-inflammatory cytokines such as IL-17A, IL-17F, IL-6 and TNF-
• IL-12 in addition to the p40 subunit in common with IL-23, contains a p35 subunit and acts through a heterodimeric receptor composed of IL-12R i and IL-12R 2.
• IL-12 is essential for Thl cell development and secretion of IFNy, a cytokine which plays a critical role in immunity by stimulating MHC expression, class switching of B cells to IgG subclasses, and the activation of macrophages (Gracie, J.A.
• mice deficient in either p40, pi 9, or IL-23R are protected from disease in models of multiple sclerosis, rheumatoid arthritis, inflammatory bowel disease, lupus and psoriasis, among others (Kyttaris, V.C. et al, "Cutting edge: IL-23 receptor deficiency prevents the development of lupus nephritis in C57BL/6-lpr/lpr mice", J.
• Thl7 cells have been identified in active lesions in the brain from MS patients and in the gut mucosa of patients with active Crohn's disease (Lee, E. et al, "Increased expression of interleukin 23 pi 9 and p40 in lesional skin of patients with psoriasis vulgaris", J. Exp. Med. , 199: 125-130 (2004); Tzartos, J.S. et al, "Interleukin- 17 production in central nervous system infiltrating T cells and glial cells is associated with active disease in multiple sclerosis", Am. J. Pathol, 172: 146-155 (2008)).
• mRNA levels of pi 9, p40, and p35 in active SLE patients were also shown to be significantly higher compared with those in inactive SLE patients (Huang, X. et al, "Dysregulated expression of interleukin-23 and interleukin-12 subunits in systemic lupus erythematosus patients", Mod. Rheumatol , 17:220-223 (2007)), and T cells from lupus patients have a predominant Thl phenotype (Tucci, M. et al, "Overexpression of interleukin-12 and T helper 1 predominance in lupus nephritis", Clin. Exp. Immunol, 154:247-254 (2008)).
• anti-p40 treatment which inhibits both IL-12 and IL-23, as well as IL-23- specific anti-pl9 therapies have been shown to be efficacious in the treatment of autoimmunity in diseases including psoriasis, Crohn's Disease and psoriatic arthritis (Leonardi, C.L. et al, "PHOENIX 1 study investigators. Efficacy and safety of ustekinumab, a human interleukin-12/23 monoclonal antibody, in patients with psoriasis: 76-week results from a randomized, double-blind, placebo-controlled trial (PHOENIX 1)", Lancet, 371 : 1665-1674 (2008); Sandborn, W.J.
• Type I group of interferons which include the IFNa members as well as ⁇ , IFNs, IFNK and IFNco, act through a heterodimer IFNa/ ⁇ receptor (IFNAR).
• Type I IFNs have multiple effects in both the innate and adaptive immune systems including activation of both the cellular and humoral immune responses as well as enhancing the expression and release of autoantigens (Hall, J.C. et al, "Type I interferons: crucial participants in disease amplification in autoimmunity", Nat. Rev. Rheumatol , 6:40-49 (2010)).
• IFN interferon
• IFNa type I interferon
• IFNa signature type I IFN-regulated genes
• IFNa A direct role for IFNa in the pathobiology of lupus is evidenced by the observation that the administration of IFNa to patients with malignant or viral diseases can induce a lupus-like syndrome. Moreover, the deletion of the IFNAR in lupus-prone mice provides high protection from
• Tyrosine kinase 2 (Tyk2) is a member of the Janus kinase (JAK) family of nonreceptor tyrosine kinases and has been shown to be critical in regulating the signal transduction cascade downstream of receptors for IL-12, IL-23 and type I interferons in both mice (Ishizaki, M. et al, "Involvement of Tyrosine Kinase-2 in Both the IL-12/Thl and IL-23/Thl7 Axes In vivo", J. Immunol, 187: 181-189 (2011); Prchal-Murphy, M.
• J. Immunol 187: 181-189 (2011)
• Prchal-Murphy M.
• Tyk2 mediates the receptor-induced phosphorylation of members of the STAT family of transcription factors, an essential signal that leads to the dimerization of STAT proteins and the transcription of STAT- dependent pro-inflammatory genes.
• Tyk2-deficient mice are resistant to experimental models of colitis, psoriasis and multiple sclerosis, demonstrating the importance of Tyk2- mediated signaling in autoimmunity and related disorders (Ishizaki, M. et al,
• Tyk2 In humans, individuals expressing an inactive variant of Tyk2 are protected from multiple sclerosis and possibly other autoimmune disorders (Couturier, N. et al., "Tyrosine kinase 2 variant influences T lymphocyte polarization and multiple sclerosis susceptibility", Brain, 134:693-703 (2011)). Genome-wide association studies have shown other variants of Tyk2 to be associated with autoimmune disorders such as Crohn's Disease, psoriasis, systemic lupus erythematosus, and rheumatoid arthritis, further demonstrating the importance of Tyk2 in autoimmunity (Ellinghaus, D.
• new compounds capable of modulating cytokines and/or interferons such as IL-12, IL-23 and/or IFNa, and methods of using these compounds may provide substantial therapeutic benefits to a wide variety of patients in need thereof.
• the invention is directed to compounds of Formula I which are useful as modulators of IL-12, IL-23 and/or IFNa by inhibiting Tyk2-mediated signal transduction.
• the present invention also provides processes and intermediates for making the compounds of the present invention.
• the present invention also provides pharmaceutical compositions comprising a pharmaceutically acceptable carrier and at least one of the compounds of the present invention.
• the present invention also provides a method for the modulation of IL-12, IL-23 and/or IFNa by inhibiting Tyk-2-mediated signal transduction comprising administering to a host in need of such treatment a therapeutically effective amount of at least one of the compounds of the present invention.
• the present invention also provides a method for treating proliferative, metabolic, allergic, autoimmune and inflammatory diseases, comprising administering to a host in need of such treatment a therapeutically effective amount of at least one of the compounds of the present invention.
• an inflammatory and autoimmune disease or disorder includes any disease having an inflammatory or autoimmune component.
• Another embodiment is a method for treating metabolic diseases, including type 2 diabetes and atherosclerosis.
• the present invention also provides the use of the compounds of the present invention for the manufacture of a medicament for the treatment of cancers.
• the present invention also provides the compounds of the present invention for use in therapy. DETAILED DESCRIPTION OF THE INVENTION
• X is -N- or -CH-
• Y is -N- or -CH-
• R 1 is hydrogen, Ci-6 alkyl or C3-8 cycloalkyl
• R 2 is C5-8 aryl or C5-8 heteroaryl, substituted with 0-4 R 2a ;
• R 2a is independently, at each occurrence, hydrogen, Ci-6 alkyl, Ci-6
• R 2b is hydrogen or C1-4 alkyl
• R 2c is hydrogen or C1-4 alkyl
• R 2d is hydrogen or C1-4 alkyl
• R b is hydrogen or C1-4 alkyl
• R 3 is C(0)-C3-io cycloalkyl, Ce- ⁇ aryl or a 5-10 membered heterocyclyl containing
• R a is independently, at each occurrence, hydrogen, halo, OH, OCF3, CF3, CHF2, CN, Ci-6 alkyl, Ci-6 alkoxy, -C(0)NR b R c , 5-7 membered heterocycle containing 1 -4 heteroatoms selected from N, O, and S, C(O)- 5-7 membered heterocycle containing 1 -4 heteroatoms selected from N, O, and S or 2-pyrrolidone;
• R b is hydrogen or C1-4 alkyl
• R c is hydrogen or C1-4 alkyl
• R 1 is hydrogen, Ci-6 alkyl or C3-8 cycloalkyl
• R 2 is C5-8 aryl or C5-8 heteroaryl, substituted with 0-4 R 2a ;
• R 2a is independently, at each occurrence, hydrogen, Ci-6 alkyl, Ci-6
• R 2b is hydrogen or C1-4 alkyl
• R 2c is hydrogen or C1-4 alkyl
• R 2d is hydrogen or C1-4 alkyl
• R b is hydrogen or C1-4 alkyl
• R 3 is C(0)-C3-io cycloalkyl, Ce- ⁇ aryl or a 5-10 membered heterocyclyl containing 1-4 heteroatoms selected from N, O, and S, each group substituted with 0-4 R a ;
• R a is independently, at each occurrence, hydrogen, halo, OH, OCF3, CF3, CHF2, CN, Ci-6 alkyl, Ci-6 alkoxy, -C(0)NR b R c , 5-7 membered heterocycle containing 1 -4 heteroatoms selected from N, O, and S, or C(O)- 5-7 membered heterocycle containing 1-4 heteroatoms selected from N, O, and S;
• R b is hydrogen or C1-4 alkyl
• R c is hydrogen or C1-4 alkyl
• R 1 is hydrogen, C1-4 alkyl or C3-6 cycloalkyl
• R 2 is C5-8 aryl or C5-8 heteroaryl, substituted with 0-3 R 2a ;
• R 2a is independently, at each occurrence, hydrogen, Ci-6 alkyl, Ci-6
• R 2b is hydrogen or C1-4 alkyl
• R 2c is hydrogen or C1-4 alkyl
• R 2d is hydrogen or C1-4 alkyl
• R b is hydrogen or Ci-4 alkyl
• R 3 is C(0)-C3-io cycloalkyl, Ce- ⁇ aryl or a 5-10 membered heterocyclyl containing 1-4 heteroatoms selected from N, O, and S, each group substituted with 0-4 R a ;
• R a is independently, at each occurrence, hydrogen, halo, OH, OCF3, CF3, CHF2, CN, Ci-6 alkyl, Ci-e alkoxy, -C(0)NR b R c , 5-7 membered heterocycle containing 1-4 heteroatoms selected from N, O, and S, or C(O)- 5-7 membered heterocycle containing 1-4 heteroatoms selected from N, O, and S;
• R b is hydrogen or C1-4 alkyl
• R c is hydrogen or C1-4 alkyl
• R 1 is hydrogen or C1-4 alkyl
• R 2 is phenyl or pyridyl, substituted with 0-2 R 2a ;
• R 2a is independently, at each occurrence, hydrogen, Ci-6 alkyl, Ci-6
• R 2b is hydrogen or C1-4 alkyl
• R 2c is hydrogen or C1-4 alkyl
• R 2d is hydrogen or C1-4 alkyl
• R b is hydrogen or C1-4 alkyl
• R 3 is C(0)-C3-io cycloalkyl, Ce- ⁇ aryl or a 5-10 membered heterocyclyl containing 1-4 heteroatoms selected from N, O, and S, each group substituted with 0-4 R a ;
• R a is independently, at each occurrence, hydrogen, halo, OH, OCF3, CF3, CHF2,
• Ci-6 alkyl Ci-6 alkoxy, -C(0)NR b R c , 5-7 membered heterocycle containing 1-4 heteroatoms selected from N, O, and S, or C(O)- 5-7 membered heterocycle containing 1-4 heteroatoms selected from N, O, and S;
• R b is hydrogen or C1-4 alkyl
• R c is hydrogen or C1-4 alkyl
• R 1 is Ci-4 alkyl
• R 2 is phenyl or pyridyl, substituted with 0-2 R 2a ;
• R 2a is independently, at each occurrence, hydrogen, Ci-6 alkyl, Ci-6
• R 2b is hydrogen or Ci-4 alkyl
• R 2c is hydrogen or Ci-4 alkyl
• R 2d is hydrogen or Ci-4 alkyl
• R b is hydrogen or Ci-4 alkyl
• R 3 is C(0)-C3-6 cycloalkyl, phenyl, pyridyl, pyrimidinyl, piperazinyl or pyridazinyl, substituted with 0-4 R a ;
• R a is independently, at each occurrence, hydrogen, halo, OH, OCF3, CF3, CHF2, CN, Ci-6 alkyl, Ci-e alkoxy, -C(0)NR b R c , 5-7 membered heterocycle containing 1 -4 heteroatoms selected from N, O, and S, or C(O)- 5-7 membered heterocycle containing 1-4 heteroatoms selected from N, O, and S;
• R b is hydrogen or C1-4 alkyl
• R c is hydrogen or C1-4 alkyl
• R 1 is Ci-4 alkyl
• R 2 is phenyl or pyridyl, substituted with 0-2 R 2a ;
• R 2a is independently, at each occurrence, hydrogen, Ci-6 alkyl, Ci-6 alkoxy, -S(0)2 Ci-4 alkyl, C(0)NH2 or a 5-7 membered heterocycle containing 1-4 heteroatoms selected from N, O, and S substituted with 0-2 R b ;
• R b is hydrogen or C1-4 alkyl
• R 3 is C(0)-C3-6 cycloalkyl, phenyl, pyrazolyl, pyridyl, pyrimidinyl, piperazinyl or pyridazinyl, substituted with 0-4 R a ;
• R a is independently, at each occurrence, hydrogen, halo, OH, OCF3, CF3, CHF2, CN, Ci-6 alkyl, Ci-6 alkoxy, -C(0)NR b R c , 5-7 membered heterocycle containing 1-4 heteroatoms selected from N, O, and S, or C(O)- 5-7 membered heterocycle containing 1-4 heteroatoms selected from N, O, and S;
• R b is hydrogen or C1-4 alkyl
• R c is hydrogen or C1-4 alkyl
• R 1 is Ci-4 alkyl
• R 2 is phenyl or pyridyl, substituted with 0-2 R 2a ;
• R 2a is independently, at each occurrence, hydrogen, Ci-6 alkyl, Ci-6 alkoxy, -S(0)2 Ci-4 alkyl, C(0)NH2 or a 5-7 membered heterocycle containing 1-4 heteroatoms selected from N, O, and S substituted with 0-2 R b ;
• R b is hydrogen or C1-4 alkyl
• R 3 is C(0)-C3-6 cycloalkyl, phenyl, pyrazolyl, pyridyl, pyrimidinyl, piperazinyl or pyridazinyl, substituted with 0-2 R a ;
• R a is independently, at each occurrence, hydrogen, halo, OH, CF3, CN, C1-3 alkyl, Ci-3 alkoxy, -C(0)NH2 , morpholinyl, or C(O)- morpholinyl;
• R 1 is Ci-4 alkyl
• R 2 is phenyl or pyridyl, substituted with 0-2 R 2a ;
• R 2a is independently, at each occurrence, hydrogen, CH3, OCH3, -S(0)2 CH3, or C(0)NH 2 ;
• R 3 is C(0)-C3-6 cycloalkyl, phenyl, pyrazolyl, pyridyl, pyrimidinyl, piperazinyl or pyridazinyl, substituted with 0-2 R a ;
• R a is independently, at each occurrence, hydrogen, halo, OH, CF3, CN, C1-3 alkyl, Ci-3 alkoxy, -C(0)NH2 , morpholinyl, or C(O)- morpholinyl; or a stereoisomer or pharmaceutically-acceptable salt thereof.
• composition comprising one or more compounds of formula I and a pharmaceutically acceptable carrier or diluent.
• the present invention is also directed to pharmaceutical compositions useful in treating diseases associated with the modulation of IL-12, IL-23 and/or IFNa by acting on Tyk-2 to cause signal transduction inhibition, comprising compounds of formula I, or pharmaceutically-acceptable salts thereof, and pharmaceutically-acceptable carriers or diluents.
• the invention further relates to methods of treating diseases associated with the modulation of IL-12, IL-23, and/or IFNa, comprising administering to a patient in need of such treatment a therapeutically-effective amount of a compound according to formula I.
• the present invention also provides a method for treating proliferative, metabolic, allergic, autoimmune and inflammatory diseases (or use of the compounds of the present invention for the manufacture of a medicament for the treatment of these diseases), comprising administering to a host in need of such treatment a therapeutically effective amount of at least one of the compounds of the present invention.
• the present invention also provides a method of treating an inflammatory or autoimmune disease (or use of the compounds of the present invention for the manufacture of a medicament for the treatment of these diseases) comprising
• the present invention also provides a method for treating a disease (or use of the compounds of the present invention for the manufacture of a medicament for the treatment of these diseases), comprising administering to a patient in need of such treatment a therapeutically-effective amount of a compound of Formula I, wherein the disease is rheumatoid arthritis, multiple sclerosis, systemic lupus erythematosus (SLE), lupus nephritis, cutaneous lupus, inflammatory bowel disease, psoriasis, Crohn's Disease, psoriatic arthritis, Sjogren's syndrome, systemic scleroderma, ulcerative colitis, Graves' disease, discoid lupus erythematosus, adult onset Stills, systemic onset juvenile idiopathic arthritis, gout, gouty arthritis, type 1 diabetes, insulin dependent diabetes mellitus, sepsis, septic shock, Shigellosis, pancreatitis (acute
• thrombocytopenia atopic dermatitis, myasthenia gravis, pancreatitis (acute or chronic), ankylosing spondylitis, pemphigus vulgaris, Goodpasture's disease, antiphospholipid syndrome, idiopathic thrombocytopenia, ANCA-associated vasculitis, pemphigus, Kawasaki disease, Chronic Inflammatory Demyelinating Polyneuropathy (CIDP), dermatomyositis, polymyositis, uveitis, Guillain-Barre syndrome, autoimmune pulmonary inflammation, autoimmune thyroiditis, autoimmune inflammatory eye disease, and chronic demyelinating polyneuropathy.
• CIDP Chronic Inflammatory Demyelinating Polyneuropathy
• the present invention also provides a method of treating an inflammatory or autoimmune disease (or use of the compounds of the present invention for the
• a therapeutically-effective amount of a compound of Formula I wherein the disease is selected from systemic lupus erythematosus (SLE), lupus nephritis, cutaneous lupus, Crohn's Disease, ulcerative colitis, type 1 diabetes, psoriasis, rheumatoid arthritis, systemic onset juvenile idiopathic arthritis, ankylosing spondylitis, and multiple sclerosis.
• SLE systemic lupus erythematosus
• lupus nephritis cutaneous lupus
• Crohn's Disease ulcerative colitis
• type 1 diabetes psoriasis
• rheumatoid arthritis systemic onset juvenile idiopathic arthritis
• ankylosing spondylitis and multiple sclerosis.
• the present invention also provides a method for treating a rheumatoid arthritis (or use of the compounds of the present invention for the manufacture of a medicament for the treatment of rheumatoid arthritis, comprising administering to a patient in need of such treatment a therapeutically-effective amount of a compound of Formula I.
• the present invention also provides a method of treating a condition (or use of the compounds of the present invention for the manufacture of a medicament for the treatment of these conditions) comprising administering to a patient in need of such treatment a therapeutically-effective amount of a compound of Formula I, wherein the condition is selected from acute myelogenous leukemia, chronic myelogenous leukemia, metastatic melanoma, Kaposi's sarcoma, multiple myeloma, solid tumors, ocular neovasculization, and infantile haemangiomas, B cell lymphoma, systemic lupus erythematosus (SLE), rheumatoid arthritis, psoriatic arthritis, multiple vasculitides, idiopathic thrombocytopenic purpura (ITP), myasthenia gravis, allergic rhinitis, multiple sclerosis (MS), transplant rejection, Type I diabetes, membranous nephritis, inflammatory a,
• HUS/TTP thrombocytopenic purpura
• the present invention also provides a method of treating a IL-12, IL-23, and/or IFNa mediated disease (or use of the compounds of the present invention for the
• the present invention also provides a method of treating a IL-12, IL-23 and/or IFNa mediated disease (or use of the compounds of the present invention for the
• the present invention also provides a method of treating diseases, comprising administering to a patient in need of such treatment a therapeutically-effective amount of a compound of formula I in combination with other therapeutic agents.
• the present invention also provides the compounds of the present invention for use in therapy.
• compounds of formula I are selected from exemplified compounds or combinations of exemplified compounds or other embodiments herein.
• any variable e.g. , R 3
• its definition at each occurrence is independent of its definition at every other occurrence.
• R 3 at each occurrence is selected independently from the definition of R 3 .
• substituents and/or variables are permissible only if such combinations result in stable compounds.
• nitrogen atoms e.g. , amines
• these can be converted to N-oxides by treatment with an oxidizing agent (e.g., MCPBA and/or hydrogen peroxides) to afford other compounds of this invention.
• an oxidizing agent e.g., MCPBA and/or hydrogen peroxides
• ⁇ is used in structural formulas herein to depict the bond that is the point of attachment of the moiety or substituent to the core or backbone structure.
• a dash "-" that is not between two letters or symbols is used to indicate a point of attachment for a substituent.
• -CONH2 is attached through the carbon atom.
• optionally substituted in reference to a particular moiety of the compound of Formula I (e.g. , an optionally substituted heteroaryl group) refers to a moiety having 0, 1, 2, or more substituents.
• optionally substituted alkyl encompasses both “alkyl” and “substituted alkyl” as defined below. It will be understood by those skilled in the art, with respect to any group containing one or more substituents, that such groups are not intended to introduce any substitution or substitution patterns that are sterically impractical, synthetically non-feasible and/or inherently unstable.
• alkyl or “alkylene” is intended to include both branched and straight-chain saturated aliphatic hydrocarbon groups having the specified number of carbon atoms.
• “Ci-10 alkyl” (or alkylene), is intended to include Ci, C2, C3, C 4 , C5, C6, C7, Ce, C9, and C10 alkyl groups.
• C1-C6 alkyl denotes alkyl having 1 to 6 carbon atoms.
• Alkyl groups can be unsubstituted or substituted so that one or more of its hydrogens are replaced by another chemical group.
• Example alkyl groups include, but are not limited to, methyl (Me), ethyl (Et), propyl (e.g., n-propyl and isopropyl), butyl (e.g., n-butyl, isobutyl, i-butyl), pentyl (e.g. , n-pentyl, isopentyl, neopentyl), and the like.
• alkenyl or “alkenylene” is intended to include hydrocarbon chains of either straight or branched configuration and having one or more double carbon-carbon bonds that may occur in any stable point along the chain.
• C2-6 alkenyl (or alkenylene), is intended to include C2, C3, C 4 , C5, and Ce alkenyl groups.
• alkenyl examples include, but are not limited to, ethenyl, 1-propenyl, 2-propenyl, 2-butenyl, 3-butenyl, 2-pentenyl, 3- pentenyl, 4-pentenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, 5-hexenyl, 2-methyl-2-propenyl, 4- methyl-3-pentenyl, and the like.
• Alkynyl or “alkynylene” is intended to include hydrocarbon chains of either straight or branched configuration and having one or more triple carbon-carbon bonds that may occur in any stable point along the chain.
• C2-6 alkynyl (or alkynylene), is intended to include C2, C3, C 4 , C5, and Ce alkynyl groups; such as ethynyl, propynyl, butynyl, pentynyl, hexynyl and the like.
• alkyl refers to a substituted alkyl group as defined above where at least one of the substituents is an aryl, such as benzyl.
• aryl(Co-4)alkyl includes a substituted lower alkyl having at least one aryl substituent and also includes an aryl directly bonded to another group, i.e. , aryl(Co)alkyl.
• heteroarylalkyl refers to a substituted alkyl group as defined above where at least one of the substituents is a heteroaryl.
• substituted alkenyl, alkynyl, alkylene, alkenylene, or alkynylene group these groups are substituted with one to three substituents as defined above for substituted alkyl groups.
• alkoxy refers to an oxygen atom substituted by alkyl or substituted alkyl, as defined herein.
• alkoxy includes the group -0-Ci-6alkyl such as methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, sec-butoxy, fert-butoxy, pentoxy, 2-pentyloxy, isopentoxy, neopentoxy, hexoxy, 2-hexoxy, 3-hexoxy, 3- methylpentoxy, and the like.
• “Lower alkoxy” refers to alkoxy groups having one to four carbons.
• a stable compound or stable structure is meant to imply a compound that is sufficiently robust to survive isolation from a reaction mixture to a useful degree of purity, and subsequent formulation into an efficacious therapeutic agent. It is preferred that the presently recited compounds do not contain a N-halo, S(0)2H, or S(0)H group.
• cycloalkyl refers to cyclized alkyl groups, including mono-, bi- or poly- cyclic ring systems.
• C3-7 cycloalkyl is intended to include C3, C 4 , C5, Ce, and C7 cycloalkyl groups.
• Example cycloalkyl groups include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, norbornyl, and the like.
• carbocycle or
• Carbocyclic residue is intended to mean any stable 3-, 4-, 5-, 6-, or 7-membered monocyclic or bicyclic or 7-, 8-, 9-, 10-, 11 -, 12-, or 13-membered bicyclic or tricyclic ring, any of which may be saturated, partially unsaturated, unsaturated or aromatic.
• carbocycles include, but are not limited to, cyclopropyl, cyclobutyl, cyclobutenyl, cyclopentyl, cyclopentenyl, cyclohexyl, cycloheptenyl, cycloheptyl, cycloheptenyl, adamantyl, cyclooctyl, cyclooctenyl, cyclooctadienyl, [3.3.0]bicyclooctane,
• carbocycles are cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and phenyl.
• carbocycle When the term “carbocycle” is used, it is intended to include “aryl” .
• a bridged ring occurs when one or more carbon atoms link two non-adjacent carbon atoms.
• Preferred bridges are one or two carbon atoms. It is noted that a bridge always converts a monocyclic ring into a bicyclic ring. When a ring is bridged, the substituents recited for the ring may also be present on the bridge.
• aryl refers to monocyclic or bicyclic aromatic hydrocarbon groups having 6 to 12 carbon atoms in the ring portion, such as phenyl, and naphthyl groups, each of which may be substituted.
• cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, bicyclooctyl, etc., as the following ring systems:
• Preferred cycloalkyl groups include cyclopropyl, cyclopentyl, cyclohexyl, and
• halo or “halogen” refers to chloro, bromo, fluoro and iodo.
• haloalkyl means a substituted alkyl having one or more halo substituents.
• haloalkyl includes mono, bi, and trifluoromethyl.
• haloalkoxy means an alkoxy group having one or more halo substituents.
• haloalkoxy includes OCF3.
• aryl groups include:
• heterocycle and the like, which optionally may be substituted at any available carbon or nitrogen atom.
• a preferred aryl group is optionally-substituted phenyl.
• heterocycle and the terms “heterocycle”, “heterocycloalkyl”, “heterocyclo”, “heterocyclic”, or
• heterocyclyl may be used interchangeably and refer to substituted and unsubstituted 3- to 7-membered monocyclic groups, 7- to 11-membered bicyclic groups, and 10- to 15- membered tricyclic groups, in which at least one of the rings has at least one heteroatom (O, S or N), said heteroatom containing ring preferably having 1 , 2, or 3 heteroatoms selected from O, S, and N.
• Each ring of such a group containing a heteroatom can contain one or two oxygen or sulfur atoms and/or from one to four nitrogen atoms provided that the total number of heteroatoms in each ring is four or less, and further provided that the ring contains at least one carbon atom.
• the nitrogen and sulfur atoms may optionally be oxidized and the nitrogen atoms may optionally be quatemized.
• the fused rings completing the bicyclic and tricyclic groups may contain only carbon atoms and may be saturated, partially saturated, or fully unsaturated.
• the heterocyclo group may be attached at any available nitrogen or carbon atom.
• heterocycle As used herein the terms "heterocycle”, “heterocycloalkyl”, “heterocyclo”, “heterocyclic”, and “heterocyclyl” include “heteroaryl” groups, as defined below.
• exemplary monocyclic heterocyclyl groups include azetidinyl, pyrrolidinyl, oxetanyl, imidazolinyl, oxazolidinyl, isoxazolinyl, thiazolidinyl, isothiazolidinyl, tetrahydrofuranyl, piperidyl, piperazinyl, 2- oxopiperazinyl, 2-oxopiperidyl, 2-oxopyrrolodinyl, 2-oxoazepinyl, azepinyl, 1 -pyridonyl, 4-piperidonyl, tetrahydropyranyl, morpholinyl, thiamorpholinyl, thiamorpholinyl sulfoxide, thiamorpholinyl sulfone, 1,3-dioxolane and tetrahydro-l ,l -dioxothien
• heteroaryl refers to substituted and unsubstituted aromatic 5- or 6- membered monocyclic groups, 9- or 10-membered bicyclic groups, and 11- to 14- membered tricyclic groups which have at least one heteroatom (O, S or N) in at least one of the rings, said heteroatom-containing ring preferably having 1, 2, or 3 heteroatoms selected from O, S, and N.
• Each ring of the heteroaryl group containing a heteroatom can contain one or two oxygen or sulfur atoms and/or from one to four nitrogen atoms provided that the total number of heteroatoms in each ring is four or less and each ring has at least one carbon atom.
• the fused rings completing the bicyclic and tricyclic groups may contain only carbon atoms and may be saturated, partially saturated, or unsaturated.
• the nitrogen and sulfur atoms may optionally be oxidized and the nitrogen atoms may optionally be quaternized.
• Heteroaryl groups which are bicyclic or tricyclic must include at least one fully aromatic ring but the other fused ring or rings may be aromatic or non- aromatic.
• Exemplary monocyclic heteroaryl groups include pyrrolyl, pyrazolyl, pyrazolinyl, imidazolyl, oxazolyl, isoxazolyl, thiazolyl, thiadiazolyl, isothiazolyl, furanyl, thienyl, oxadiazolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl and the like.
• Exemplary bicyclic heteroaryl groups include indolyl, benzothiazolyl, benzodioxolyl, benzoxazolyl, benzothienyl, quinolinyl, tetrahydroisoquinolinyl, isoquinolinyl, benzimidazolyl, benzopyranyl, indolizinyl, benzofuranyl, chromonyl, coumarinyl, benzopyranyl, cinnolinyl, quinoxalinyl, indazolyl, pyrrolopyridyl, furopyridyl, dihydroisoindolyl, tetrahydroquinolinyl and the like.
• Exemplary tricyclic heteroaryl groups include carbazolyl, benzindolyl, phenanthrollinyl, acridinyl, phenanthridinyl, xanthenyl and the like.
• heteroaryl groups include:
• aryl e.g. , phenyl
• cycloalkyl e.g., cyclohexyl
• heterocyclo e.g. , pyrrolidinyl, piperidinyl, and morpholinyl
• heteroaryl e.g. , tetrazolyl, imidazolyl, pyrazolyl, triazolyl, thiazolyl, and furyl
• the reference is intended to include rings having 0 to 3, preferably 0 to 2, substituents selected from those recited above for the aryl, cycloalkyl, heterocyclo and/or heteroaryl groups, as appropriate.
• Carbocyclyl or “carbocyclic” refers to a saturated or unsaturated monocyclic or bicyclic ring in which all atoms of all rings are carbon. Thus, the term includes cycloalkyl and aryl rings.
• Monocyclic carbocycles have 3 to 6 ring atoms, still more typically 5 or 6 ring atoms.
• Bicyclic carbocycles have 7 to 12 ring atoms, e.g., arranged as a bicyclo [4,5], [5,5], [5,6] or [6,6] system, or 9 or 10 ring atoms arranged as a bicyclo [5,6] or [6,6] system.
• Examples of mono- and bicyclic carbocycles include cyclopropyl, cyclobutyl, cyclopentyl, 1-cyclopent-l-enyl, l-cyclopent-2-enyl, 1- cyclopent-3-enyl, cyclohexyl, 1-cyclohex-l-enyl, l-cyclohex-2-enyl, l-cyclohex-3-enyl, phenyl and naphthyl.
• the carbocyclic ring may be substituted in which case the substituents are selected from those recited above for cycloalkyl and aryl groups.
• heteroatoms shall include oxygen, sulfur and nitrogen.
• the compounds of formula I may exist in a free form (with no ionization) or can form salts which are also within the scope of this invention. Unless otherwise indicated, reference to an inventive compound is understood to include reference to the free form and to salts thereof.
• the term "salt(s)" denotes acidic and/or basic salts formed with inorganic and/or organic acids and bases.
• the term “salt(s)” may include zwitterions (inner salts), e.g. , when a compound of formula I, contains both a basic moiety, such as an amine or a pyridine or imidazole ring, and an acidic moiety, such as a carboxylic acid.
• Pharmaceutically acceptable i.e.
• non-toxic, physiologically acceptable salts are preferred, such as, for example, acceptable metal and amine salts in which the cation does not contribute significantly to the toxicity or biological activity of the salt.
• other salts may be useful, e.g., in isolation or purification steps which may be employed during preparation, and thus, are contemplated within the scope of the invention.
• Salts of the compounds of the formula I may be formed, for example, by reacting a compound of the formula I with an amount of acid or base, such as an equivalent amount, in a medium such as one in which the salt precipitates or in an aqueous medium followed by lyophilization.
• Exemplary acid addition salts include acetates (such as those formed with acetic acid or trihaloacetic acid, for example, trifluoroacetic acid), adipates, alginates, ascorbates, aspartates, benzoates, benzenesulfonates, bisulfates, borates, butyrates, citrates, camphorates, camphorsulfonates, cyclopentanepropionates, digluconates, dodecylsulfates, ethanesulfonates, fumarates, glucoheptanoates, glycerophosphates, hemisulfates, heptanoates, hexanoates, hydrochlorides (formed with hydrochloric acid), hydrobromides (formed with hydrogen bromide), hydroiodides, 2- hydroxy ethanesulfonates, lactates, maleates (formed with maleic acid), methanesulfonates (formed with methanes
• Exemplary basic salts include ammonium salts, alkali metal salts such as sodium, lithium, and potassium salts; alkaline earth metal salts such as calcium and magnesium salts; barium, zinc, and aluminum salts; salts with organic bases (for example, organic amines) such as trialkylamines such as triethylamine, procaine, dibenzylamine, N-benzyl- ⁇ -phenethylamine, 1 -ephenamine, N,N-dibenzylethylene-diamine, dehydroabietylamine, N-ethylpiperidine, benzylamine, dicyclohexylamine or similar pharmaceutically acceptable amines and salts with amino acids such as arginine, lysine and the like.
• organic bases for example, organic amines
• trialkylamines such as triethylamine, procaine, dibenzylamine, N-benzyl- ⁇ -phenethylamine, 1 -ephenamine,
• Basic nitrogen-containing groups may be quatemized with agents such as lower alkyl halides (e.g. , methyl, ethyl, propyl, and butyl chlorides, bromides and iodides), dialkyl sulfates (e.g. , dimethyl, diethyl, dibutyl, and diamyl sulfates), long chain halides (e.g. , decyl, lauryl, myristyl and stearyl chlorides, bromides and iodides), aralkyl halides (e.g., benzyl and phenethyl bromides), and others.
• Preferred salts include monohydrochloride, hydrogensulfate, methanesulfonate, phosphate or nitrate salts.
• phrases "pharmaceutically acceptable” is employed herein to refer to those compounds, materials, compositions, and/or dosage forms which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of human beings and animals without excessive toxicity, irritation, allergic response, or other problem or complication, commensurate with a reasonable benefit/risk ratio.
• pharmaceutically-acceptable salts refer to derivatives of the disclosed compounds wherein the parent compound is modified by making acid or base salts thereof.
• examples of pharmaceutically-acceptable salts include, but are not limited to, mineral or organic acid salts of basic groups such as amines; and alkali or organic salts of acidic groups such as carboxylic acids.
• the pharmaceutically-acceptable salts include the conventional non-toxic salts or the quaternary ammonium salts of the parent compound formed, for example, from non-toxic inorganic or organic acids.
• such conventional non-toxic salts include those derived from inorganic acids such as hydrochloric, hydrobromic, sulfuric, sulfamic, phosphoric, and nitric; and the salts prepared from organic acids such as acetic, propionic, succinic, gly colic, stearic, lactic, malic, tartaric, citric, ascorbic, pamoic, maleic, hydroxymaleic, phenylacetic, glutamic, benzoic, salicylic, sulfanilic, 2-acetoxybenzoic, fumaric, toluenesulfonic,
• inorganic acids such as hydrochloric, hydrobromic, sulfuric, sulfamic, phosphoric, and nitric
• organic acids such as acetic, propionic, succinic, gly colic, stearic, lactic, malic, tartaric, citric, ascorbic, pamoic, maleic, hydroxymaleic, phenylace
• the pharmaceutically-acceptable salts of the present invention can be synthesized from the parent compound which contains a basic or acidic moiety by conventional chemical methods. Generally, such salts can be prepared by reacting the free acid or base forms of these compounds with a stoichiometric amount of the appropriate base or acid in water or in an organic solvent, or in a mixture of the two; generally, nonaqueous media like ether, ethyl acetate, ethanol, isopropanol, or acetonitrile are preferred. Lists of suitable salts are found in Remington 's Pharmaceutical Sciences, 18th Edition, Mack Publishing Company, Easton, PA (1990), the disclosure of which is hereby incorporated by reference.
• Stereoisomers may include compounds which are optical isomers through possession of one or more chiral atoms, as well as compounds which are optical isomers by virtue of limited rotation about one or more bonds (atropisomers).
• the definition of compounds according to the invention embraces all the possible stereoisomers and their mixtures. It very particularly embraces the racemic forms and the isolated optical isomers having the specified activity.
• the racemic forms can be resolved by physical methods, such as, for example, fractional crystallization, separation or crystallization of diastereomeric derivatives or separation by chiral column chromatography.
• the individual optical isomers can be obtained from the racemates from the conventional methods, such as, for example, salt formation with an optically active acid followed by crystallization.
• the present invention is intended to include all isotopes of atoms occurring in the present compounds.
• Isotopes include those atoms having the same atomic number but different mass numbers.
• isotopes of hydrogen include deuterium and tritium.
• isotopes of carbon include 1 C and 14 C.
• Prodrugs and solvates of the inventive compounds are also contemplated.
• the term "prodrug” denotes a compound which, upon administration to a subject, undergoes chemical conversion by metabolic or chemical processes to yield a compound of the formula I, and/or a salt and/or solvate thereof. Any compound that will be converted in vivo to provide the bioactive agent (i. e. , the compound for formula I) is a prodrug within the scope and spirit of the invention.
• compounds containing a carboxy group can form physiologically hydrolyzable esters which serve as prodrugs by being hydrolyzed in the body to yield formula I compounds per se.
• Such prodrugs are preferably administered orally since hydrolysis in many instances occurs principally under the influence of the digestive enzymes.
• esters of compounds of formula I include Ci-6alkylbenzyl, 4-methoxybenzyl, indanyl, phthalyl, methoxymethyl,
• Ci-6alkanoyloxy-Ci-6alkyl e.g. , acetoxymethyl, pivaloyloxymethyl or
• esters used, for example, in the penicillin and cephalosporin arts. Such esters may be prepared by conventional techniques known in the art.
• prodrug derivatives are well known in the art.
• prodrug derivatives see:
• the compounds of the invention modulate IL-23 -stimulated and IFNa-stimulated cellular functions, including gene transcription.
• Other types of cellular functions that may be modulated by the compounds of the instant invention include, but are not limited to, IL-12-stimulated responses.
• compounds of formula I have utility in treating conditions associated with the modulation of the function of IL-23 or IFNa, and particularly the selective inhibition of function of IL-23, IL-12 and/or IFNa, by acting onTyk2 to mediate signal transduction.
• Such conditions include IL-23-, IL-12-, or IFNa-associated diseases in which pathogenic mechanisms are mediated by these cytokines.
• the terms "treating” or “treatment” encompass the treatment of a disease state in a mammal, particularly in a human, and include: (a) preventing or delaying the occurrence of the disease state in a mammal, in particular, when such mammal is predisposed to the disease state but has not yet been diagnosed as having it; (b) inhibiting the disease state, i.e. , arresting its development; and/or (c) achieving a full or partial reduction of the symptoms or disease state, and/or alleviating, ameliorating, lessening, or curing the disease or disorder and/or its symptoms.
• compounds of Formula I are useful in treating IL-23-, IL-12- or IFNa- associated diseases including, but not limited to, inflammatory diseases such as Crohn's disease, ulcerative colitis, asthma, graft versus host disease, allograft rejection, chronic obstructive pulmonary disease; autoimmune diseases such as Graves' disease, rheumatoid arthritis, systemic lupus erythematosis, cutaneous lupus, lupus nephritis, discoid lupus erythematosus, psoriasis; auto-inflammatory diseases including CAPS, TRAPS, FMF, adult onset stills, systemic onset juvenile idiopathic arthritis, gout, gouty arthritis;
• inflammatory diseases such as Crohn's disease, ulcerative colitis, asthma, graft versus host disease, allograft rejection, chronic obstructive pulmonary disease
• autoimmune diseases such as Graves' disease, rhe
• metabolic diseases including type 2 diabetes, atherosclerosis, myocardial infarction; destructive bone disorders such as bone resorption disease, osteoarthritis, osteoporosis, multiple myeloma-related bone disorder; proliferative disorders such as acute myelogenous leukemia, chronic myelogenous leukemia; angiogenic disorders such as angiogenic disorders including solid tumors, ocular neovasculization, and infantile haemangiomas; infectious diseases such as sepsis, septic shock, and Shigellosis;
• neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, cerebral ischemias or neurodegenerative disease caused by traumatic injury, oncologic and viral diseases such as metastatic melanoma, Kaposi's sarcoma, multiple myeloma, and HIV infection and CMV retinitis, AIDS, respectively.
• the specific conditions or diseases that may be treated with the inventive compounds include, without limitation, pancreatitis (acute or chronic), asthma, allergies, adult respiratory distress syndrome, chronic obstructive pulmonary disease, glomerulonephritis, rheumatoid arthritis, systemic lupus erythematosis, cutaneous lupus, lupus nephritis, discoid lupus erythematosus, scleroderma, chronic thyroiditis, Graves' disease, autoimmune gastritis, diabetes, autoimmune hemolytic anemia, autoimmune neutropenia, thrombocytopenia, atopic dermatitis, chronic active hepatitis, myasthenia gravis, multiple sclerosis, inflammatory bowel disease, ulcerative colitis, Crohn's disease, psoriasis, graft vs.
• Preferred methods of treatment are those wherein the condition is selected from Crohn's disease, ulcerative colitis, allograft rejection, rheumatoid arthritis, psoriasis, ankylosing spondylitis, psoriatic arthritis, and pemphigus vulgaris.
• preferred methods of treatment are those wherein the condition is selected from ischemia reperfusion injury, including cerebral ischemia reperfusions injury arising from stroke and cardiac ischemia reperfusion injury arising from myocardial infarction.
• Another preferred method of treatment is one in which the condition is multiple myeloma.
• IL-23-, IL-12- and/or IFNa-associated condition or "IL-23-, IL-
• the present invention thus provides methods for treating such conditions, comprising administering to a subject in need thereof a therapeutically-effective amount of at least one compound of Formula I or a salt thereof.
• “Therapeutically effective amount” is intended to include an amount of a compound of the present invention that is effective when administered alone or in combination to inhibit IL-23, IL-12 and/or IFNa function and/or treat diseases.
• the methods of treating IL-23-, IL-12 and/or IFNa-associated conditions may comprise administering compounds of Formula I alone or in combination with each other and/or other suitable therapeutic agents useful in treating such conditions.
• therapeutically effective amount is also intended to include an amount of the combination of compounds claimed that is effective to inhibit IL-23, IL-12 and/or IFNa function and/or treat diseases associated with IL-23, IL-12 and/or IFNa.
• Such other therapeutic agents include corticosteroids, rolipram, calphostin, cytokine-suppressive anti-inflammatory drugs (CSAIDs), Interleukin-10, glucocorticoids, salicylates, nitric oxide, and other immunosuppressants; nuclear translocation inhibitors, such as deoxyspergualin (DSG); non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen, celecoxib and rofecoxib; steroids such as prednisone or dexamethasone; antiviral agents such as abacavir; antiproliferative agents such as methotrexate, leflunomide, FK506 (tacrolimus, PROGRAF®); anti-malarials such as hydroxychloroquine; cytotoxic drugs such as azathiprine and cyclophosphamide; TNF-a inhibitors such as tenidap, anti-TNF antibodies or soluble TNF receptor,
• therapeutic agents when employed in combination with the compounds of the present invention, may be used, for example, in those amounts indicated in the Physicians ' Desk Reference (PDR) or as otherwise determined by one of ordinary skill in the art.
• PDR Physicians ' Desk Reference
• such other therapeutic agent(s) may be administered prior to, simultaneously with, or following the
• the present invention also provides pharmaceutical compositions capable of treating IL-23-, IL-12- or IFNa-associated conditions by inhibiting Tyk2-mediated signal transduction, including IL-23-, IL-12- and/or IFNa-mediated diseases, as described above.
• inventive compositions may contain other therapeutic agents as described above and may be formulated, for example, by employing conventional solid or liquid vehicles or diluents, as well as pharmaceutical additives of a type appropriate to the mode of desired administration (e.g., excipients, binders, preservatives, stabilizers, flavors, etc.) according to techniques such as those well known in the art of pharmaceutical formulation.
• pharmaceutical additives e.g., excipients, binders, preservatives, stabilizers, flavors, etc.
• the present invention further includes compositions comprising one or more compounds of Formula I and a pharmaceutically acceptable carrier.
• a “pharmaceutically acceptable carrier” refers to media generally accepted in the art for the delivery of biologically active agents to animals, in particular, mammals.
• Pharmaceutically acceptable carriers are formulated according to a number of factors well within the purview of those of ordinary skill in the art. These include without limitation the type and nature of the active agent being formulated; the subject to which the agent- containing composition is to be administered; the intended route of administration of the composition; and, the therapeutic indication being targeted.
• Pharmaceutically acceptable carriers include both aqueous and non-aqueous liquid media, as well as a variety of solid and semi-solid dosage forms. Such carriers can include a number of different ingredients and additives in addition to the active agent, such additional ingredients being included in the formulation for a variety of reasons, e.g. , stabilization of the active agent, binders, etc., well known to those of ordinary skill in the art. Descriptions of suitable
• the compounds of Formula I may be administered by any means suitable for the condition to be treated, which may depend on the need for site-specific treatment or quantity of drug to be delivered.
• Topical administration is generally preferred for skin- related diseases, and systematic treatment preferred for cancerous or pre-cancerous conditions, although other modes of delivery are contemplated.
• the compounds may be delivered orally, such as in the form of tablets, capsules, granules, powders, or liquid formulations including syrups; topically, such as in the form of solutions, suspensions, gels or ointments; sublingually; bucally; parenterally, such as by subcutaneous, intravenous, intramuscular or intrastemal injection or infusion techniques (e.g. , as sterile injectable aq.
• Dosage unit formulations containing non-toxic, pharmaceutically acceptable vehicles or diluents may be administered.
• the compounds may be administered in a form suitable for immediate release or extended release.
• Immediate release or extended release may be achieved with suitable pharmaceutical compositions or, particularly in the case of extended release, with devices such as subcutaneous implants or osmotic pumps.
• compositions for topical administration include a topical carrier such as PLASTIBASE® (mineral oil gelled with polyethylene).
• compositions for oral administration include suspensions which may contain, for example, microcrystalline cellulose for imparting bulk, alginic acid or sodium alginate as a suspending agent, methylcellulose as a viscosity enhancer, and sweeteners or flavoring agents such as those known in the art; and immediate release tablets which may contain, for example, microcrystalline cellulose, di calcium phosphate, starch, magnesium stearate and/or lactose and/or other excipients, binders, extenders, disintegrants, diluents and lubricants such as those known in the art.
• the inventive compounds may also be orally delivered by sublingual and/or buccal administration, e.g. , with molded, compressed, or freeze-dried tablets.
• compositions may include fast-dissolving diluents such as mannitol, lactose, sucrose, and/or cyclodextrins.
• fast-dissolving diluents such as mannitol, lactose, sucrose, and/or cyclodextrins.
• high molecular weight excipients such as celluloses (AVICEL®) or polyethylene glycols (PEG); an excipient to aid mucosal adhesion such as hydroxypropyl cellulose (HPC), hydroxypropyl methyl cellulose (HPMC), sodium carboxymethyl cellulose (SCMC), and/or maleic anhydride copolymer (e.g., GANTREZ®); and agents to control release such as polyacrylic copolymer (e.g. , CARBOPOL 934®).
• Lubricants, glidants, flavors, coloring agents and stabilizers may also be added for ease of fabrication and use.
• compositions for nasal aerosol or inhalation administration include solutions which may contain, for example, benzyl alcohol or other suitable preservatives, absorption promoters to enhance absorption and/or bioavailability, and/or other solubilizing or dispersing agents such as those known in the art.
• compositions for parenteral administration include injectable solutions or suspensions which may contain, for example, suitable non-toxic, parenterally acceptable diluents or solvents, such as mannitol, 1,3-butanediol, water, Ringer's solution, an isotonic sodium chloride solution, or other suitable dispersing or wetting and suspending agents, including synthetic mono- or diglycerides, and fatty acids, including oleic acid.
• suitable non-toxic, parenterally acceptable diluents or solvents such as mannitol, 1,3-butanediol, water, Ringer's solution, an isotonic sodium chloride solution, or other suitable dispersing or wetting and suspending agents, including synthetic mono- or diglycerides, and fatty acids, including oleic acid.
• compositions for rectal administration include suppositories which may contain, for example, suitable non-irritating excipients, such as cocoa butter, synthetic glyceride esters or polyethylene glycols, which are solid at ordinary
• the therapeutically-effective amount of a compound of the present invention may be determined by one of ordinary skill in the art, and includes exemplary dosage amounts for a mammal of from about 0.05 to 1000 mg/kg; 1-1000 mg/kg; 1-50 mg/kg; 5-250 mg/kg; 250-1000 mg/kg of body weight of active compound per day, which may be administered in a single dose or in the form of individual divided doses, such as from 1 to 4 times per day.
• the specific dose level and frequency of dosage for any particular subject may be varied and will depend upon a variety of factors, including the activity of the specific compound employed, the metabolic stability and length of action of that compound, the species, age, body weight, general health, sex and diet of the subj ect, the mode and time of administration, rate of excretion, drug combination, and severity of the particular condition.
• Preferred subjects for treatment include animals, most preferably mammalian species such as humans, and domestic animals such as dogs, cats, horses, and the like.
• this term is intended to include all subjects, most preferably mammalian species that are affected by modulation of IL-23, IL-12 and/or IFNa-mediated functions.
• the compounds of the present invention may be synthesized by many methods available to those skilled in the art of organic chemistry.
• General synthetic schemes for preparing compounds of the present invention are described below. These schemes are illustrative and are not meant to limit the possible techniques one skilled in the art may use to prepare the compounds disclosed herein. Different methods to prepare the compounds of the present invention will be evident to those skilled in the art.
• the various steps in the synthesis may be performed in an alternate sequence in order to give the desired compound or compounds.
• Examples of compounds of the present invention prepared by methods described in the general schemes are given in the preparations and examples section set out hereinafter. Preparation of homochiral examples may be carried out by techniques known to one skilled in the art. For example, homochiral compounds may be prepared by separation of racemic products by chiral phase preparative HPLC. Alternatively, the example compounds may be prepared by methods known to give enantiomerically enriched products.
• Scheme 1 illustrates a general synthesis of 8-substituted 2,6-diamino-9H-purines of the general structure 6.
• 8-substituted lH-purine-2,6(3H,9H)-dione (1) and reacting with phosphorus oxy chloride in the presence of a suitable base such as 1,8- diazabicyclo[5.4.0]-undec-7-ene (DBU) under heating affords the 2,6-dichloropurine 2.
• a suitable protecting group reagent such as 2- trimethylsilyl)ethoxymethyl chloride (SEM-Cl) in the presence of a base such as sodium hydride affords the suitably protected intermediate 3.
• arylamino group i ArNEh
• an appropriate base such as sodium bis(trimethylsilyl)amide (NaHMDS) in a suitable solvent such as THF to afford the monochloro intermediate 4.
• this intermediate can be reacted with an amine (R3NH2) in the presence of a suitable catalyst such as palladium acetate, a ligand such as BrettPhos, and a base such as potassium carbonate in a solvent such as dioxane at elevated temperature to afford the desired product 6.
• a suitable catalyst such as palladium acetate, a ligand such as BrettPhos, and a base such as potassium carbonate in a solvent such as dioxane at elevated temperature to afford the desired product 6.
• Intermediate 5 can then be converted to the final product 6 as previously described.
• Scheme 2 illustrates a general synthesis of 2-substituted-3H-irnidazo[4,5- b]pyridine-5,7-diamines of the general structure 12.
• a suitable oxidizing agent such as meto-chloroperbenzoic acid (mCPBA) in a solvent such as ethyl acetate affords the N- oxide intermediate 8.
• Reaction of 8 with phosphorus oxy chloride (POCh) provides the chloride 9 which can be subjected to another similar oxidation and chlorination sequence to afford the key dichloride intermediate 11.
• Intermediate 11 can then be converted to product 12 similar to the sequence described in Scheme 1 for the conversion of intermediate 3 to 6.
• Preparation of compounds of Formula (I), and intermediates used in the preparation of compounds of Formula (I), can be prepared using procedures shown in the following Examples and related procedures. The methods and conditions used in these examples, and the actual compounds prepared in these Examples, are not meant to be limiting, but are meant to demonstrate how the compounds of Formula (I) can be prepared. Starting materials and reagents used in these examples, when not prepared by a procedure described herein, are generally either commercially available, or are reported in the chemical literature, or may be prepared by using procedures described in the chemical literature.
• the phrase "dried and concentrated” generally refers to drying of a solution in an organic solvent over either sodium sulfate or magnesium sulfate, followed by filtration and removal of the solvent from the filtrate (generally under reduced pressure and at a temperature suitable to the stability of the material being prepared).
• Column chromatography was performed with pre-packed silica gel cartridges using a medium pressure chromatography apparatus (Teledyne Corporation), eluting with the solvent or solvent mixture indicated.
• NaHCC sodium bicarbonate
• DCM dichloromethane
• DIEA NN-diisopropylethylamine
• rt ambient room temperature (generally about 20-25 °C)
• Solvent A 90% water - 10% acetonitrile - 0.1 % TFA
• Solvent B 10% water - 90% acetonitrile - 0.1% TFA
• the reaction mixture was cooled in an ice bath and water was slowly added dropwise initially to quench, then the contents were diluted with additional water to a total volume of - 80 mL.
• the dark brown mixture was extracted with EtOAc (3 x 50 mL) and the combined extracts were diluted with one volume of hexanes and washed with water (4 x 40 mL), then brine before drying over anhyd. sodium sulfate. Decanting the dried extracts and concentration under vacuum afforded -2.7 g of a dark red-brown oil as the crude product mixture.
• the crude product was subjected to silica gel chromatography using a 40 g cartridge and loading the crude product dissolved in a minimal amount of dichloromethane.
• This material was purified via preparative LC/MS with the following conditions: Column: Waters XBridge C18, 19 x 150 mm, 5- ⁇ particles; Mobile Phase A: 5:95 acetonitrile: water with 10-mM ammonium acetate; Mobile Phase B: 95:5 acetonitrile: water with 10- mM ammonium acetate; Gradient: 10-100% B over 15 minutes, then a 5-minute hold at 100% B; Flow: 20 mL/min. Fractions containing the desired product were combined and dried via centrifugal evaporation to afford 34.9 mg (65%) of the desired product.
• Examples 3 - 52 were prepared using similar methods as previously described for the preparation of Example 2.
• Examples 32 - 34 were prepared using commercially available 2-aminobenzamide in place of 2-(methylthio)aniline in Example 2.
• Examples 35-38 were prepared using commercially available 2-methoxyaniline in place of 2- (methylthio)aniline in Example 2.
• Examples 39 and 40 were prepared using 2-methoxy- 3-(l-methyl-lH-l,2,4-triazol-3-yl)aniline (prepared as described in WO 2015069310) in place of 2-(methylthio)aniline in Example 2.
• Examples 41 - 50 were prepared using commercially available 2-amino-3-(thiomethyl)pyridine in place of 2-(thiomethyl)aniline in Example 2.
• Examples 51 - 52 were prepared from 2-ethyl-3H-imidazo[4,5-b]pyridine (Tet. Lett. 2006, 47, 2883 - 2886) using similar procedures as described in the preparation of Example 2.
• test compounds along with recombinantly expressed His-tagged protein corresponding to amino acids 575- 869 of human Tyk2 (sequence shown below) at 2.5 nM, 40 nM ((i?)-N-(l-(3-(8-methyl-5- (methylamino)-8H-imidazo[4,5-d]thiazolo[5,4-b]pyridin-2-yl)phenyl)ethyl)-2-
• Probe Displacement Assay To 10 26 nM fluorescein labeled probe plus 0.2 nM anti-6xHis-terbium labeled antibody (Medarex, labeled by Cisbio) in assay buffer (20 mM Hepes pH 7.5, 150 mM NaCl, 10 mM MgC12, 2 mM DTT, 50 ⁇ g/mL BSA, and 0.015% Brij 35) was added 10iL recombinant human His-tagged Tyk2 pseudokinase domain (His-TVMV-Tyk2, 575- 869) to a final concentration of 0.5 nM.
• assay buffer 20 mM Hepes pH 7.5, 150 mM NaCl, 10 mM MgC12, 2 mM DTT, 50 ⁇ g/mL BSA, and 0.015% Brij 35
• the HTRF signal (ratio of fluorescence intensities at emission wavelengths for fluorescein acceptor at 520 nm and terbium donor at 495 nm) was measured on an Envision Plate Reader. Percent inhibition was calculated by comparison to a control without inhibitor and a control without protein. Dose response curves were generated to determine the concentration required for inhibiting 50% of the HTRF signal (EC50).
• 2-([ 3 H]methylsulfonyl)benzoic acid 2-Mercaptobenzoic acid (2.3 mg, 0.015 mmol) and cesium carbonate (2 mg, 0.006 mmol) were added to a 5 mL round-bottomed flask. The flask was attached to a ported glass vacuum line and anhydrous DMF (0.5 mL) was introduced with magnetic stirring. An ampoule of tritiated methyl iodide (200 mCi, Perkin-Elmer lot 3643419) was added to the reaction flask and stirring was maintained at rt for 3h. In-process HPLC analysis with radiometric detection indicated 80% conversion to the desired product by comparison with authentic standard.
• the radiochemical purity was measured by HPLC to be 99% (Luna 5u C18 (4.6X150 cm); A: H 2 0 (0.1%TFA); B: MeOH; 1.2ml/min; 270nm; 0- lOmin 20%B; 10-15min 20-100%B; 15-25min 100%B.
• the product was dissolved in anhydrous acetonitrile to give a final solution activity of 5.8 mCi/mL.
• HPLC analysis (Luna 5u CI 8 (4.6X150 cm); A: H 2 O(0.1%TFA); B: MeOH; 1.2ml/min; 335nm; 0-20min 50% B; 20-25min 50- 100% B; 25-30min 100%B) indicated approximately a 20% conversion to the desired product by retention time comparison to a sample of non-radiolabeled (i?)-N-(l-(3-(8- methyl-5-(methylandno)-8H-imidazo[4,5-d]thiazolo[5,4-b]pyridin-2-yl)phenyl)ethyl)-2- (methylsulfonyl)benzamide.
• Kit225 T cells with a stably-integrated STAT-dependent luciferase reporter were plated in RPMI (Gibco) containing 10% heat-inactivated FBS (Gibco) and 100 U/mL PenStrep (Gibco). The cells were then stimulated with either 20 ng/mL human recombinant IL-23 or 200 U/mL human recombinant IFNa (PBL Interferons ource) for 5- 6 hours. Luciferase expression was measured using the STEADY-GLO® Luciferase Assay System (Promega) according to the manufacturer's instructions. Inhibition data were calculated by comparison to no inhibitor control wells for 0% inhibition and non- stimulated control wells for 100% inhibition. Dose response curves were generated to determine the concentration required to inhibit 50% of cellular response (IC50) as derived by non-linear regression analysis.
• IC50 concentration required to inhibit 50% of cellular response

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