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US20080287437A1 - Pyrazolylaminopyrimidine Derivatives Useful as Tyrosine Kinase Inhibitors - Google Patents

Pyrazolylaminopyrimidine Derivatives Useful as Tyrosine Kinase Inhibitors Download PDF

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Publication number
US20080287437A1
US20080287437A1 US11/914,492 US91449206A US2008287437A1 US 20080287437 A1 US20080287437 A1 US 20080287437A1 US 91449206 A US91449206 A US 91449206A US 2008287437 A1 US2008287437 A1 US 2008287437A1
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alkyl
formula
carbamoyl
amino
compound
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Bin Wang
Tao Wang
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AstraZeneca AB
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AstraZeneca AB
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Assigned to ASTRAZENECA AB reassignment ASTRAZENECA AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WANG, TAO, WANG, BIN
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—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
    • C07D401/14—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 three or more hetero rings
    • 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
    • A61K31/506—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim not condensed and containing further heterocyclic rings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A61P35/02—Antineoplastic agents specific for leukemia
    • 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

Definitions

  • the present invention relates to novel pyrazole derivatives, their pharmaceutical compositions and methods of use.
  • the present invention relates to therapeutic methods for the treatment and prevention of cancers and to the use of these pyrazole derivatives in the manufacture of medicaments for use in the treatment and prevention of cancers.
  • RTK's Receptor tyrosine kinases
  • TTK's Receptor tyrosine kinases
  • Trk's are the high affinity receptors activated by a group of soluble growth factors called neurotrophins (NT).
  • the Trk receptor family has three members—TrkA, TrkB and TrkC.
  • NTs nerve growth factor
  • TrkA nerve growth factor
  • TrkB brain-derived growth factor
  • TrkC neurotrophins
  • NT3 neurotrophins
  • Each Trk receptor contains an extra-cellular domain (ligand binding), a trans-membrane region and an intra-cellular domain (including kinase domain).
  • the kinase Upon binding of the ligand, the kinase catalyzes auto-phosphorylation and triggers downstream signal transduction pathways.
  • Trk's are widely expressed in neuronal tissue during its development where Trk's are critical for the maintenance and survival of these cells.
  • Trk's play important role in both development and function of the nervous system (Patapoutian, A. et al Current Opinion in Neurobiology, 2001, 11, 272-280).
  • Trk inhibitors may yield a class of apoptosis-inducing agents specific for androgen-independent prostate cancer (Weeraratna, A. T. et al The Prostate, 2000, 45, 140-148).
  • Trk's are associated with secretory breast carcinoma ( Cancer Cell, 2002, 2, 367-376), colorectal cancer (Bardelli et al Science, 2003, 300, 949-949) and ovarian cancer (Davidson, B. et al Clinical Cancer Research, 2003, 9, 2248-2259).
  • Trk inhibitors There are a few reports of selective Trk tyrosine kinase inhibitors. Cephalon described CEP-751, CEP-701 (George, D. et al Cancer Research, 1999, 59, 2395-2341) and other indolocarbazole analogues (WO0114380) as Trk inhibitors. It was shown that CEP-701 and/or CEP751, when combined with surgically or chemically induced androgen ablation, offered better efficacy compared with mono-therapy alone. GlaxoSmithKline disclosed certain oxindole compounds as Trk A inhibitors in WO0220479 and WO0220513. Recently, Japan Tobacco reported pyrazolyl condensed cyclic compounds as Trk inhibitors (JP2003231687A).
  • Vertex Pharmaceuticals have described pyrazole compounds as inhibitors of GSK3, Aurora, etc. in WO0250065, WO0262789, WO03027111 and WO200437814; and AstraZeneca have reported pyrazole compounds as inhibitors against IGF-1 receptor kinase (WO0348133). AstraZeneca have also reported Trk inhibitors in International Applications WO 2005/049033 and WO 2005/103010.
  • novel pyrazole compounds, or pharmaceutically acceptable salts thereof which possess Trk kinase inhibitory activity and are accordingly useful for their anti-proliferation and/or proapoptotic (such as anti-cancer) activity and in methods of treatment of the human or animal body.
  • the invention also relates to processes for the manufacture of said pyrazole compounds, or pharmaceutically acceptable salts thereof, to pharmaceutical compositions containing them and to their use in the manufacture of medicaments for use in the production of an anti-proliferation and/or proapoptotic effect in warm-blooded animals such as man.
  • the applicants provide methods of using such pyrazole compounds, or pharmaceutically acceptable salts thereof, in the treatment of cancer.
  • the properties of the compounds claimed in this invention are expected to be of value in the treatment of disease states associated with cell proliferation such as cancers (solid tumors and leukemia), fibroproliferative and differentiative disorders, psoriasis, rheumatoid arthritis, Kaposi's sarcoma, haemangioma, acute and chronic nephropathies, atheroma, atherosclerosis, arterial restenosis, autoimmune diseases, acute and chronic inflammation, bone diseases and ocular diseases with retinal vessel proliferation.
  • cancers solid tumors and leukemia
  • fibroproliferative and differentiative disorders psoriasis, rheumatoid arthritis
  • Kaposi's sarcoma haemangioma
  • atheroma atherosclerosis
  • arterial restenosis autoimmune diseases
  • autoimmune diseases acute and chronic inflammation
  • bone diseases and ocular diseases with retinal vessel proliferation ocular diseases with retinal vessel proliferation.
  • the compounds, or pharmaceutically acceptable salts thereof, of the invention are expected to be of value in the treatment or prophylaxis of cancers selected from congenital fibrosarcoma, mesoblastic nephroma, mesothelioma, acute myeloblastic leukemia, acute lymphocytic leukemia, multiple myeloma, melanoma, oesophageal cancer, myeloma, hepatocellular, pancreatic, cervical cancer, Ewings sarcoma, neuroblastoma, Kaposi sarcoma, ovarian cancer, breast cancer including secretory breast cancer, colorectal cancer, prostate cancer including hormone refractory prostate cancer, bladder cancer, melanoma, lung cancer—non small cell lung cancer (NSCLC), and small cell lung cancer (SCLC), gastric cancer, head and neck cancer, renal cancer, lymphoma, thyroid cancer including papillary thyroid cancer, mesothelioma and leukaemia
  • R 1 is selected from hydrogen, hydroxy, amino, mercapto, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, C 1-6 alkylsulphonylamino, 3-5-membered carbocyclyl or 3-5-membered heterocyclyl; wherein R 1 may be optionally substituted on carbon by one or more R 6 ; and wherein if said heterocyclyl contains an —NH— moiety that nitrogen may be optionally substituted by a group selected from R 7 ;
  • R 2 and R 3 are independently selected from hydrogen, halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 alkylsulphony
  • R 4 is selected from cyano, carboxy, carbamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkanoyl, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkoxycarbonyl, carbocyclyl or heterocyclyl; wherein R 4 may be optionally substituted on carbon by one or more R 10 ; and wherein if said heterocyclyl contains an —NH— moiety that nitrogen may be optionally substituted by a group selected from R 11 ;
  • R 5 is selected from halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 alkylsulphonylamino, carbo
  • n 1, 2 or 3; wherein the values of R 5 may be the same or different;
  • R 6 , R 8 , R 10 and R 12 are independently selected from halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 al
  • R 7 , R 9 , R 11 , R 13 and R 15 are independently selected from C 1-6 alkyl, C 1-6 alkanoyl, C 1-6 alkylsulphonyl, C 1-6 alkoxycarbonyl, carbamoyl, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl)carbamoyl, benzyl, benzyloxycarbonyl, benzoyl and phenylsulphonyl; wherein R 7 , R 9 , R 11 , R 13 and R 15 independently of each other may be optionally substituted on carbon by on or more R 16 ;
  • R 14 and R 16 are independently selected from halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 alkylsulphonylamin
  • R 17 is selected from halo, nitro, cyano, hydroxy, trifluoromethoxy, trifluoromethyl, amino, carboxy, carbamoyl, mercapto, sulphamoyl, methyl, ethyl, methoxy, ethoxy, acetyl, acetoxy, methylamino, ethylamino, dimethylamino, diethylamino, N-methyl-N-ethylamino, acetylamino, N-methylcarbamoyl, N-ethylcarbamoyl, N,N-dimethylcarbamoyl, N,N-diethylcarbamoyl, N-methyl-N-ethylcarbamoyl, methylthio, ethylthio, methylsulphinyl, ethylsulphinyl, mesyl, ethylsulphonyl, methoxycarbon
  • R 19 and R 21 are independently selected from a direct bond, —O—, —N(R 22 )—, —C(O)—, —N(R 23 )C(O)—, —C(O)N(R 24 )—, —S(O) s —, —SO 2 N(R 25 )— or —N(R 26 )SO 2 —; wherein R 22 , R 23 , R 24 , R 25 and R 26 are independently selected from hydrogen or C 1-6 alkyl and s is 0-2;
  • R 18 is selected from C 1-6 alkyl, C 1-6 alkanoyl, C 1-6 alkylsulphonyl, C 1-6 alkoxycarbonyl, carbamoyl, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl)carbamoyl, benzyl, benzyloxycarbonyl, benzoyl and phenylsulphonyl;
  • R 1 is selected from hydrogen, hydroxy, amino, mercapto, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, C 1-6 alkylsulphonylamino, 3-5-membered carbocyclyl or 3-5-membered heterocyclyl; wherein R 1 may be optionally substituted on carbon by one or more R 6 ; and wherein if said heterocyclyl contains an —NH— moiety that nitrogen may be optionally substituted by a group selected from R 7 ;
  • R 2 and R 3 are independently selected from hydrogen, halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 alkylsulphony
  • R 4 is selected from cyano, carboxy, carbamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkanoyl, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkoxycarbonyl, carbocyclyl or heterocyclyl; wherein R 4 may be optionally substituted on carbon by one or more R 10 ; and wherein if said heterocyclyl contains an —NH— moiety that nitrogen may be optionally substituted by a group selected from R 11 ;
  • R 5 is selected from halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 alkylsulphonylamino, carbo
  • n 1, 2 or 3; wherein the values of R 5 may be the same or different;
  • R 6 , R 8 , R 10 and R 12 are independently selected from halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 al
  • R 7 , R 9 , R 11 , R 13 and R 15 are independently selected from C 1-6 alkyl, C 1-6 alkanoyl, C 1-6 alkylsulphonyl, C 1-6 alkoxycarbonyl, carbamoyl, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl)carbamoyl, benzyl, benzyloxycarbonyl, benzoyl and phenylsulphonyl; wherein R 7 , R 9 , R 11 , R 13 and R 15 independently of each other may be optionally substituted on carbon by on or more R 16 ;
  • R 14 and R 16 are independently selected from halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 alkylsulphonylamin
  • R 17 is selected from halo, nitro, cyano, hydroxy, trifluoromethoxy, trifluoromethyl, amino, carboxy, carbamoyl, mercapto, sulphamoyl, methyl, ethyl, methoxy, ethoxy, acetyl, acetoxy, methylamino, ethylamino, dimethylamino, diethylamino, N-methyl-N-ethylamino, acetylamino, N-methylcarbamoyl, N-ethylcarbamoyl, N,N-dimethylcarbamoyl, N,N-diethylcarbamoyl, N-methyl-N-ethylcarbamoyl, methylthio, ethylthio, methylsulphinyl, ethylsulphinyl, mesyl, ethylsulphonyl, methoxycarbon
  • R 18 is selected from C 1-6 alkyl, C 1-6 alkanoyl, C 1-6 alkylsulphonyl, C 1-6 alkoxycarbonyl, carbamoyl, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl)carbamoyl, benzyl, benzyloxycarbonyl, benzoyl and phenylsulphonyl;
  • R 1 is selected from hydrogen, hydroxy, amino, mercapto, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, C 1-6 alkylsulphonylamino, 3-5-membered carbocyclyl or 3-5-membered heterocyclyl; wherein R 1 may be optionally substituted on carbon by one or more R 6 ; and wherein if said heterocyclyl contains an —NH— moiety that nitrogen may be optionally substituted by a group selected from R 7 ;
  • R 2 and R 3 are independently selected from hydrogen, halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 alkylsulphony
  • R 4 is selected from cyano, carboxy, carbamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkanoyl, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkoxycarbonyl, carbocyclyl or heterocyclyl; wherein R 4 may be optionally substituted on carbon by one or more R 10 ; and wherein if said heterocyclyl contains an —NH— moiety that nitrogen may be optionally substituted by a group selected from R 11 ;
  • R 5 is selected from halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 alkylsulphonylamino, carbo
  • n 1, 2 or 3; wherein the values of R 5 may be the same or different;
  • R 6 , R 8 , R 10 and R 12 are independently selected from halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 al
  • R 7 , R 9 , R 11 , R 13 and R 15 are independently selected from C 1-6 alkyl, C 1-6 alkanoyl, C 1-6 alkylsulphonyl, C 1-6 alkoxycarbonyl, carbamoyl, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl)carbamoyl, benzyl, benzyloxycarbonyl, benzoyl and phenylsulphonyl; wherein R 7 , R 9 , R 11 , R 13 and R 15 independently of each other may be optionally substituted on carbon by on or more R 16 ;
  • R 14 and R 16 are independently selected from halo, nitro, cyano, hydroxy, amino, carboxy, carbamoyl, mercapto, sulphamoyl, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, C 1-6 alkanoyl, C 1-6 alkanoyloxy, N—(C 1-6 alkyl)amino, N,N—(C 1-6 alkyl) 2 amino, C 1-6 alkanoylamino, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl) 2 carbamoyl, C 1-6 alkylS(O) a wherein a is 0 to 2, C 1-6 alkoxycarbonyl, N—(C 1-6 alkyl)sulphamoyl, N,N—(C 1-6 alkyl) 2 sulphamoyl, C 1-6 alkylsulphonylamin
  • R 17 is selected from halo, nitro, cyano, hydroxy, trifluoromethoxy, trifluoromethyl, amino, carboxy, carbamoyl, mercapto, sulphamoyl, methyl, ethyl, methoxy, ethoxy, acetyl, acetoxy, methylamino, ethylamino, dimethylamino, diethylamino, N-methyl-N-ethylamino, acetylamino, N-methylcarbamoyl, N-ethylcarbamoyl, N,N-dimethylcarbamoyl, N,N-diethylcarbamoyl, N-methyl-N-ethylcarbamoyl, methylthio, ethylthio, methylsulphinyl, ethylsulphinyl, mesyl, ethylsulphonyl, methoxycarbon
  • R 19 and R 21 are independently selected from —O—, —N(R 22 )—, —C(O)—, —N(R 23 )C(O)—, —C(O)N(R 14 )—, —S(O) s —, —SO 2 N(R 25 )— or —N(R 26 )SO 2 —; wherein R 22 , R 23 , R 24 , R 25 and R 26 are independently selected from hydrogen or C 1-6 alkyl and s is 0-2;
  • R 18 is selected from C 1-6 alkyl, C 1-6 alkanoyl, C 1-6 alkylsulphonyl, C 1-6 alkoxycarbonyl, carbamoyl, N—(C 1-6 alkyl)carbamoyl, N,N—(C 1-6 alkyl)carbamoyl, benzyl, benzyloxycarbonyl, benzoyl and phenylsulphonyl;
  • R 1 is selected from C 1-6 alkyl, C 1-6 alkoxy or 3-5-membered carbocyclyl.
  • R 1 is selected from C 1-6 alkoxy or 3-5-membered carbocyclyl.
  • R 1 is 3-5-membered carbocyclyl.
  • R 1 is selected from C 1-6 alkyl, C 1-6 alkoxy or 3-membered carbocyclyl.
  • R 1 is selected from C 1-6 alkoxy or 3-membered carbocyclyl.
  • R 1 is 3-membered carbocyclyl.
  • R 1 is selected from isopropoxy or cyclopropyl.
  • R 1 is selected from methyl.
  • R 1 is selected from methoxy.
  • R 1 is cyclopropyl
  • R 1 is isopropoxy
  • R 2 is selected from hydrogen and halo.
  • R 1 is selected from hydrogen, fluoro, chloro and bromo.
  • R 2 is chloro
  • R 2 is hydrogen
  • R 3 is selected from hydrogen, halo, amino, C 1-6 alkoxy, N—(C 1-6 alkyl)amino or heterocyclyl-R 21 —; wherein R 3 may be optionally substituted on carbon by one or more R 8 ; wherein
  • R 8 is selected from hydroxy, carbocyclyl or heterocyclyl; wherein R 8 may be optionally substituted on carbon by one or more R 14 ;
  • R 3 is selected from hydrogen, halo, amino, C 1-6 alkoxy, N—(C 1-6 alkyl)amino or heterocyclyl-R 21 —; wherein R 3 may be optionally substituted on carbon by one or more R 8 , wherein
  • R 8 is selected from hydroxy, carbocyclyl or heterocyclyl; wherein R 8 may be optionally substituted on carbon by one or more R 14 ;
  • R 14 is C 1-6 alkyl
  • R 21 is —O—.
  • R 8 is selected from hydroxy, phenyl or 1,3-dioxolan-4-yl; wherein R 8 may be optionally substituted on carbon by one or more R 14 ;
  • R 14 is methyl
  • R 21 is a direct bond or —O—.
  • R 14 is methyl
  • R 21 is —O—.
  • R 3 is selected from hydrogen, chloro, amino, 2,3-dihydroxypropoxy, 1,3-dihydroxyprop-2-yloxy, 2,3-dihydroxypropylamino, 1,3-dihydroxyprop-2-ylamino, 2,2-dimethyl-1,3,-dioxolan-4-ylmethoxy, morpholino and 2-phenyl-1,3-dioxan-5-yloxy.
  • R 3 is selected from hydrogen, chloro, amino, 2,3-dihydroxypropoxy, 1,3-diliydroxyprop-2-yloxy, 2,3-dihydroxypropylamino, 1,3-dihydroxyprop-2-ylamino, 2,2-dimethyl-1,3,-dioxolan-4-ylmethoxy and 2-phenyl-1,3-dioxan-5-yloxy.
  • R 3 is selected from hydrogen, chloro, amino, 2,3-dihydroxypropoxy, 1,3-dihydroxyprop-2-yloxy, 2,3-dihydroxypropylamino, 1,3-dihydroxyprop-2-ylamino, (R)-2,2-dimethyl-1,3,-dioxolan-4-ylmethoxy, morpholino and (cis)-2-phenyl-1,3-dioxan-5-yloxy.
  • R 3 is selected from halo.
  • R 3 is selected from hydrogen.
  • R 3 is selected from fluoro, chloro or bromo.
  • R 2 and R 3 are independently selected from hydrogen, halo, amino, C 1-6 alkoxy, N—(C 1-6 alkyl)amino or heterocyclyl-R 21 —; wherein R 2 or R 3 may be optionally substituted on carbon by one or more R 8 ; wherein
  • R 8 is selected from hydroxy, carbocyclyl or heterocyclyl; wherein R 8 may be optionally substituted on carbon by one or more R 14 ;
  • R 14 is C 1-6 alkyl
  • R 21 is a direct bond or —O—.
  • R 2 and R 3 are independently selected from hydrogen, halo, amino, C 1-6 alkoxy, N—(C 1-6 alkyl)amino or heterocyclyl-R 21 —; wherein R 3 may be optionally substituted on carbon by one or more R 8 ; wherein
  • R 8 is selected from hydroxy, carbocyclyl or heterocyclyl; wherein R 8 may be optionally substituted on carbon by one or more R 14 ;
  • R 14 is C 1-6 alkyl
  • R 21 is —O—.
  • R 2 and R 3 are independently selected from hydrogen or halo.
  • R 2 and R 3 are independently selected from hydrogen, fluoro, chloro, bromo, amino, methoxy, propoxy, isopropoxy, propylamino, isopropylamino, morpholino-R 21 — and 1,3-dioxan-5-yl-R 21 —; wherein R 2 or R 3 may be optionally substituted on carbon by one or more R 8 ; wherein
  • R 8 is selected from hydroxy, phenyl or 1,3-dioxolan-4-yl; wherein R 8 may be optionally substituted on carbon by one or more R 14 ;
  • R 14 is methyl
  • R 21 is a direct bond or —O—.
  • R 2 and R 3 are independently selected from hydrogen, fluoro, chloro, bromo, amino, methoxy, propoxy, isopropoxy, propylamino, isopropylamino and 1,3-dioxan-5-yl-R 21 —; wherein R 3 may be optionally substituted on carbon by one or more R 8 ; wherein
  • R 8 is selected from hydroxy, phenyl or 1,3-dioxolan-4-yl; wherein R 8 may be optionally substituted on carbon by one or more R 14 ;
  • R 14 is methyl
  • R 21 is —O—.
  • R 2 and R 3 are independently selected from hydrogen, fluoro, chloro, bromo, amino, 2,3-dihydroxypropoxy, 1,3-dihydroxyprop-2-yloxy, 2,3-dihydroxypropylamino, 1,3-dihydroxyprop-2-ylamino, 2,2-dimethyl-1,3,-dioxolan-4-ylmethoxy, morpholino and 2-phenyl-1,3-dioxan-5-yloxy.
  • R 2 and R 3 are independently selected from hydrogen, fluoro, chloro, bromo, amino, 2,3-dihydroxypropoxy, 1,3-dihydroxyprop-2-yloxy, 2,3-dihydroxypropylamino, 1,3-dihydroxyprop-2-ylamino, 2,2-dimethyl-1,3,-dioxolan-4-ylmethoxy and 2-phenyl-1,3-dioxan-5-yloxy.
  • R 2 and R 3 are independently selected from hydrogen, fluoro, chloro, bromo, amino, (R)-2,3-dihydroxypropoxy, (S)-2,3-dihydroxypropoxy, 1,3-dihydroxyprop-2-yloxy, (R)-2,3-dihydroxypropylamino, 1,3-dihydroxyprop-2-ylamino, (R)-2,2-dimethyl-1,3,-dioxolan-4-ylmethoxy, morpholino and (cis)-2-phenyl-1,3-dioxan-5-yloxy.
  • R 2 and R 3 are independently selected from hydrogen, fluoro, chloro, bromo, amino, (R)-2,3-dihydroxypropoxy, (S)-2,3-dihydroxypropoxy, 1,3-dihydroxyprop-2-yloxy, (R)-2,3-dihydroxypropylamino, 1,3-dihydroxyprop-2-ylamino, (R)-2,2-dimethyl-1,3,-dioxolan-4-ylmethoxy and (cis)-2-phenyl-1,3-dioxan-5-yloxy.
  • R 2 and R 3 are independently selected from hydrogen, fluoro, chloro or bromo.
  • R 4 is selected from C 1-6 alkyl.
  • R 4 is selected from methyl.
  • R 4 is selected from (S)-methyl.
  • R 5 is selected from halo, C 1-6 alkyl or carbocyclyl.
  • R 5 is halo
  • R 5 is selected from fluoro, bromo, methyl or cyclopropyl.
  • R 5 is fluoro
  • R 5 is fluoro para to the —CH(R 4 )— group.
  • n 1 or 2 and one R 5 is para to the —CH(R 4 )— group.
  • n 1 and R 5 is para to the —CH(R 4 )— group.
  • n 1 and R 5 is fluoro para to the —CH(R 4 )— group.
  • n 1 or 2; wherein the values of R 5 may be the same or different.
  • n 2; wherein the values of R 5 may be the same or different.
  • n 3; wherein the values of R 5 may be the same or different.
  • R 2 is selected from hydrogen and halo
  • R 3 is selected from hydrogen, halo, amino, C 1-6 alkoxy, N—(C 1-6 alkyl)amino or heterocyclyl-R 21 —; wherein R 3 may be optionally substituted on carbon by one or more R 8 ;
  • R 4 is selected from C 1-6 alkyl
  • R 5 is selected from halo, C 1-6 alkyl or carbocyclyl
  • n 1 or 2; wherein the values of R 5 may be the same or different;
  • R 8 is selected from hydroxy, carbocyclyl or heterocyclyl; wherein R 8 may be optionally substituted on carbon by one or more R 14 ;
  • R 14 is C 1-6 alkyl
  • R 21 is a direct bond or —O—
  • R 1 is selected from C 1-6 alkoxy or 3-5-membered carbocyclyl
  • R 2 is selected from hydrogen and halo
  • R 3 is selected from hydrogen, halo, amino, C 1-6 alkoxy, N—(C 1-6 alkyl)amino or heterocyclyl-R 21 -; wherein R 3 may be optionally substituted on carbon by one or more R 8 ;
  • R 4 is selected from C 1-6 alkyl
  • R 5 is selected from halo, C 1-6 alkyl or carbocyclyl
  • n 1 or 2; wherein the values of R 5 may be the same or different;
  • R 8 is selected from hydroxy, carbocyclyl or heterocyclyl; wherein R 8 may be optionally substituted on carbon by one or more R 14 ;
  • R 14 is C 1-6 alkyl
  • R 21 is —O—
  • R 1 is 3-5-membered carbocyclyl
  • R 2 and R 3 are independently selected from hydrogen or halo
  • R 4 is selected from C 1-6 alkyl
  • R 5 is halo
  • n 1;
  • R 1 is selected from methyl, methoxy, isopropoxy or cyclopropyl
  • R 2 is selected from hydrogen, fluoro, chloro and bromo
  • R 3 is selected from hydrogen, chloro, amino, 2,3-dihydroxypropoxy, 1,3-dihydroxyprop-2-yloxy, 2,3-dihydroxypropylamino, 1,3-dihydroxyprop-2-ylamino, 2,2-dimethyl-1,3,-dioxolan-4-ylmethoxy, morpholino and 2-phenyl-1,3-dioxan-5-yloxy;
  • R 4 is selected from methyl
  • R 5 is selected from fluoro, bromo, methyl or cyclopropyl
  • n 1 or 2; wherein the values of R 5 may be the same or different;
  • R 1 is selected from isopropoxy or cyclopropyl
  • R 2 is selected from hydrogen, fluoro, chloro and bromo
  • R 3 is selected from hydrogen, chloro, amino, 2,3-dihydroxypropoxy, 1,3-dihydroxyprop-2-yloxy, 2,3-dihydroxypropylamino, 1,3-dihydroxyprop-2-ylamino, 2,2-dimethyl-1,3,-dioxolan-4-ylmethoxy and 2-phenyl-1,3-dioxan-5-yloxy;
  • R 4 is selected from methyl
  • R 5 is selected from fluoro, bromo, methyl or cyclopropyl
  • n 1 or 2; wherein the values of R 5 may be the same or different;
  • R 1 is cyclopropyl
  • R 2 is hydrogen
  • R 3 is selected from fluoro, chloro or bromo
  • R 4 is selected from methyl
  • R 5 is fluoro
  • n 1;
  • preferred compounds of the invention are any one of the Examples or a pharmaceutically acceptable salt thereof.
  • particular compounds of the invention are any one of Examples 1, 2, 6, 7, 8, 17, 18, 19, 20 or 35 or a pharmaceutically acceptable salt thereof.
  • the present invention provides a compound of formula (I), or a pharmaceutically acceptable salt thereof, for use as a medicament.
  • the present invention provides a compound of formula (I), or a pharmaceutically acceptable salt thereof, for use in the manufacture of a medicament for use in the inhibition of Trk activity.
  • the present invention provides a compound of formula (I), or a pharmaceutically acceptable salt thereof, for use in the manufacture of a medicament for use in the treatment or prophylaxis of cancer.
  • the present invention provides a compound of the formula (I), or a pharmaceutically acceptable salt thereof, for use in the manufacture of a medicament for use in the treatment of cancer in a warm-blooded animal such as man.
  • the present invention provides a compound of the formula (I), or a pharmaceutically acceptable salt thereof, for use in the manufacture of a medicament for use in the treatment or prophylaxis of cancers (solid tumors and leukemia), fibroproliferative and differentiative disorders, psoriasis, rheumatoid arthritis, Kaposi's sarcoma, haemangioma, acute and chronic nephropathies, atheroma, atherosclerosis, arterial restenosis, autoimmune diseases, acute and chronic inflammation, bone diseases and ocular diseases with retinal vessel proliferation in a warm-blooded animal such as man.
  • cancers solid tumors and leukemia
  • fibroproliferative and differentiative disorders include fibroproliferative and differentiative disorders, psoriasis, rheumatoid arthritis, Kaposi's sarcoma, haemangioma, acute and chronic nephropathies, atheroma, atherosclerosis, arterial reste
  • the present invention provides a compound of formula (I), or a pharmaceutically acceptable salt thereof, for use in the manufacture of a medicament for use in the production of an anti-proliferative effect.
  • the present invention provides a method of inhibiting Trk activity comprising administering to a host in need of such treatment a therapeutically effective amount of a compound of formula (I), or a pharmaceutically acceptable salt thereof.
  • the present invention provides a method for the treatment of cancer comprising administering to a host in need of such treatment a therapeutically effective amount of a compound of formula (I), or a pharmaceutically acceptable salt thereof.
  • the present invention provides a method for the treatment or prophylaxis of cancer comprising administering a therapeutically effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof.
  • the present invention provides a method for the treatment or prophylaxis of cancers (solid tumors and leukemia), fibroproliferative and differentiative disorders, psoriasis, rheumatoid arthritis, Kaposi's sarcoma, haemangioma, acute and chronic nephropathies, atheroma, atherosclerosis, arterial restenosis, autoimmune diseases, acute and chronic inflammation, bone diseases and ocular diseases with retinal vessel proliferation in a warm-blooded animal such as man comprising administering a therapeutically effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof.
  • cancers solid tumors and leukemia
  • fibroproliferative and differentiative disorders psoriasis, rheumatoid arthritis, Kaposi's sarcoma, haemangioma, acute and chronic nephropathies, atheroma, atherosclerosis, arterial restenosis, autoimmune diseases, acute and chronic inflammation,
  • the present invention provides a method of producing an anti-proliferative effect in a warm-blooded animal, such as man, in need of such treatment which comprises administering to said animal an effective amount of a compound of formula (I), or a pharmaceutically acceptable salt thereof.
  • the present invention provides a pharmaceutical composition
  • a pharmaceutical composition comprising a compound of formula (I), or a pharmaceutically acceptable salt thereof, together with at least one pharmaceutically acceptable carrier, diluent or excipient.
  • the present invention provides a pharmaceutical composition
  • a pharmaceutical composition comprising a compound of formula (I), or a pharmaceutically acceptable salt thereof, together with at least one pharmaceutically acceptable carrier, diluent or excipient for use in the inhibition of Trk activity.
  • the present invention provides a pharmaceutical composition
  • a pharmaceutical composition comprising a compound of formula (I), or a pharmaceutically acceptable salt thereof, together with at least one pharmaceutically acceptable carrier, diluent or excipient for use in the treatment of cancer.
  • the present invention provides a pharmaceutical composition
  • a pharmaceutical composition comprising a compound of formula (I), or a pharmaceutically acceptable salt thereof, together with at least one pharmaceutically acceptable carrier, diluent or excipient for use in the treatment or prophylaxis of cancer.
  • the present invention provides a pharmaceutical composition
  • a pharmaceutical composition comprising a compound of formula (I), or a pharmaceutically acceptable salt thereof, together with at least one pharmaceutically acceptable carrier, diluent or excipient for use in the treatment or prophylaxis of cancers (solid tumors and leukemia), fibroproliferative and differentiative disorders, psoriasis, rheumatoid arthritis, Kaposi's sarcoma, haemangioma, acute and chronic nephropathies, atheroma, atherosclerosis, arterial restenosis, autoimmune diseases, acute and chronic inflammation, bone diseases and ocular diseases with retinal vessel proliferation.
  • cancers solid tumors and leukemia
  • fibroproliferative and differentiative disorders psoriasis, rheumatoid arthritis, Kaposi's sarcoma, haemangioma, acute and chronic nephropathies, atheroma, atherosclerosis, arterial restenosis,
  • the present invention provides a pharmaceutical composition
  • a pharmaceutical composition comprising a compound of formula (I), or a pharmaceutically acceptable salt thereof, together with at least one pharmaceutically acceptable carrier, diluent or excipient for use in the production of an anti-proliferative effect in a warm-blooded animal such as man.
  • the present invention provides a compound of formula (I), or a pharmaceutically acceptable salt thereof, for use in the inhibition of Trk activity.
  • the present invention provides a compound of formula (I), or a pharmaceutically acceptable salt thereof, for use in the treatment or prophylaxis of cancer.
  • the present invention provides a compound of the formula (I), or a pharmaceutically acceptable salt thereof, for use in the treatment of cancer in a warm-blooded animal such as man.
  • the present invention provides a compound of the formula (I), or a pharmaceutically acceptable salt thereof, for use in the treatment or prophylaxis of cancers (solid tumours and leukaemia), fibroproliferative and differentiative disorders, psoriasis, rheumatoid arthritis, Kaposi's sarcoma, haemangioma, acute and chronic nephropathies, atheroma, atherosclerosis, arterial restenosis, autoimmune diseases, acute and chronic inflammation, bone diseases and ocular diseases with retinal vessel proliferation in a warm-blooded animal such as man.
  • cancers solid tumours and leukaemia
  • fibroproliferative and differentiative disorders psoriasis, rheumatoid arthritis, Kaposi's sarcoma, haemangioma, acute and chronic nephropathies, atheroma, atherosclerosis, arterial restenosis, autoimmune diseases, acute and chronic inflammation, bone diseases and ocular diseases with
  • the present invention provides a compound of formula (I), or a pharmaceutically acceptable salt thereof, for use in the production of an anti-proliferative effect.
  • Trk activity In one embodiment where the inhibition of Trk activity is referred to particularly this refers to the inhibition of Trk A activity.
  • Trk activity In another embodiment where the inhibition of Trk activity is referred to particularly this refers to the inhibition of Trk B activity.
  • the treatment (or prophylaxis) of cancer is referred to, particularly it refers to the treatment (or prophylaxis) of mesoblastic nephroma, mesothelioma, acute myeloblastic leukemia, acute lymphocytic leukemia, multiple myeloma, oesophageal cancer, myeloma, hepatocellular, pancreatic, cervical cancer, Ewings sarcoma, neuroblastoma, kaposis sarcoma, ovarian cancer, breast cancer including secretory breast cancer, colorectal cancer, prostate cancer including hormone refractory prostate cancer, bladder cancer, melanoma, lung cancer—non small cell lung cancer (NSCLC), and small cell lung cancer (SCLC), gastric cancer, head and neck cancer, renal cancer, lymphoma, thyroid cancer including papillary thyroid cancer, mesothelioma, leukaemia, tumours of the central and peripheral nervous system, melanoma
  • L is a displaceable group; with a pyrazole amine of formula (III):
  • L is a displaceable group, suitable values for L are for example, a halo or sulphonyloxy group, for example a chloro, bromo, methanesulphonyloxy or toluene-4-sulphonyloxy group.
  • Pyrimidines of formula (II) and pyrazole amine of formula (III) may be reacted together: a) in the presence of a suitable solvent for example a ketone such as acetone or an alcohol such as ethanol or butanol or an aromatic hydrocarbon such as toluene or N-methyl pyrrolid-2-one, optionally in the presence of a suitable acid for example an inorganic acid such as hydrochloric acid or sulphuric acid, or an organic acid such as acetic acid or formic acid (or a suitable Lewis acid) and at a temperature in the range from 0° C. to reflux, particularly reflux; or b) under standard Buchwald conditions (for example see J. Am. Chem.
  • a suitable solvent for example a ketone such as acetone or an alcohol such as ethanol or butanol or an aromatic hydrocarbon such as toluene or N-methyl pyrrolid-2-one
  • a suitable acid for example an inorganic acid such as hydroch
  • L is a displaceable group as defined herein above.
  • Pyrazole amines of formula (III) and compounds of formula (IIa) are commercially available compounds, or they are known in the literature, or they are prepared by standard processes known in the art.
  • Process b) Compounds of formula (IV) and formula (V) may be reacted together under the same conditions as outlined in Process a).
  • Process c) may conveniently be carried out in a suitable solvent such as N-methylpyrrolidinone or butanol at a temperature in the range from 100-200° C., in particular in the range from 150-170° C.
  • a suitable base such as, for example, sodium methoxide or potassium carbonate.
  • Pg is a suitable nitrogen protecting group. Suitable values for Pg are defined below.
  • Process d) may be carried out in a suitable solvent, for example, an alcohol such as ethanol or butanol at a temperature in the range from 50-120° C., in particular in the range from 70-100° C.
  • a suitable solvent for example, an alcohol such as ethanol or butanol at a temperature in the range from 50-120° C., in particular in the range from 70-100° C.
  • aromatic substitution reactions include the introduction of a nitro group using concentrated nitric acid, the introduction of an acyl group using, for example, an acyl halide and Lewis acid (such as aluminium trichloride) under Friedel Crafts conditions; the introduction of an alkyl group using an alkyl halide and Lewis acid (such as aluminium trichloride) under Friedel Crafts conditions; and the introduction of a halogeno group.
  • modifications include the reduction of a nitro group to an amino group by for example, catalytic hydrogenation with a nickel catalyst or treatment with iron in the presence of hydrochloric acid with heating; oxidation of alkylthio to alkylsulphinyl or alkylsulphonyl.
  • a suitable protecting group for an amino or alkylamino group is, for example, an acyl group, for example an alkanoyl group such as acetyl, an alkoxycarbonyl group, for example a methoxycarbonyl, ethoxycarbonyl or t-butoxycarbonyl group, an arylmethoxycarbonyl group, for example benzyloxycarbonyl, or an aroyl group, for example benzoyl.
  • the deprotection conditions for the above protecting groups necessarily vary with the choice of protecting group.
  • an acyl group such as an alkanoyl or alkoxycarbonyl group or an aroyl group may be removed for example, by hydrolysis with a suitable base such as an alkali metal hydroxide, for example lithium or sodium hydroxide.
  • a suitable base such as an alkali metal hydroxide, for example lithium or sodium hydroxide.
  • an acyl group such as a t-butoxycarbonyl group may be removed, for example, by treatment with a suitable acid as hydrochloric, sulphuric or phosphoric acid or trifluoroacetic acid and an arylmethoxycarbonyl group such as a benzyloxycarbonyl group may be removed, for example, by hydrogenation over a catalyst such as palladium-on-carbon, or by treatment with a Lewis acid for example boron tris(trifluoroacetate).
  • a suitable alternative protecting group for a primary amino group is, for example, a phthaloyl group which may be removed by treatment with an alkylamine, for example dimethylaminopropylamine, or with hydrazine.
  • a suitable protecting group for a hydroxy group is, for example, an acyl group, for example an alkanoyl group such as acetyl, an aroyl group, for example benzoyl, or an arylmethyl group, for example benzyl.
  • the deprotection conditions for the above protecting groups will necessarily vary with the choice of protecting group.
  • an acyl group such as an alkanoyl or an aroyl group may be removed, for example, by hydrolysis with a suitable base such as an alkali metal hydroxide, for example lithium or sodium hydroxide.
  • a suitable base such as an alkali metal hydroxide, for example lithium or sodium hydroxide.
  • an arylmethyl group such as a benzyl group may be removed, for example, by hydrogenation over a catalyst such as palladium-on-carbon.
  • a suitable protecting group for a carboxy group is, for example, an esterifying group, for example a methyl or an ethyl group which may be removed, for example, by hydrolysis with a base such as sodium hydroxide, or for example a t-butyl group which may be removed, for example, by treatment with an acid, for example an organic acid such as trifluoroacetic acid, or for example a benzyl group which may be removed, for example, by hydrogenation over a catalyst such as palladium-on-carbon.
  • a base such as sodium hydroxide
  • a t-butyl group which may be removed, for example, by treatment with an acid, for example an organic acid such as trifluoroacetic acid, or for example a benzyl group which may be removed, for example, by hydrogenation over a catalyst such as palladium-on-carbon.
  • the protecting groups may be removed at any convenient stage in the synthesis using conventional techniques well known in the chemical art.
  • alkyl includes both straight and branched chain alkyl groups but references to individual alkyl groups such as “propyl” are specific for the straight chain version only.
  • C 1-6 alkyl” and “C 1-4 alkyl” include methyl, ethyl, propyl, isopropyl and t-butyl.
  • references to individual alkyl groups such as ‘propyl’ are specific for the straight-chained version only and references to individual branched chain alkyl groups such as ‘isopropyl’ are specific for the branched-chain version only.
  • a similar convention applies to other radicals.
  • halo refers to fluoro, chloro, bromo and iodo.
  • a “heterocyclyl” is a saturated, partially saturated or unsaturated, mono or bicyclic ring containing 4-12 atoms of which at least one atom is chosen from nitrogen, sulphur or oxygen, which may, unless otherwise specified, be carbon or nitrogen linked, wherein a —CH 2 -group can optionally be replaced by a —C(O)—, and a ring sulphur atom may be optionally oxidised to form the S-oxides.
  • heterocyclyl is morpholino, piperazinyl and pyrrolidinyl.
  • a “heterocyclyl” is a saturated, partially saturated or unsaturated, mono or bicyclic ring containing 5 or 6 atoms of which at least one atom is chosen from nitrogen, sulphur or oxygen, it may, unless otherwise specified, be carbon or nitrogen linked, a —CH 2 -group can optionally be replaced by a —C(O)— and a ring sulphur atom may be optionally oxidised to form the S-oxides.
  • a “3-5-membered heterocyclyl” is a saturated, partially saturated or unsaturated, monocyclic ring containing 3, 4 or 5 atoms of which at least one atom is chosen from nitrogen, sulphur or oxygen, which may, unless otherwise specified, be carbon or nitrogen linked, wherein a —CH 2 — group can optionally be replaced by a —C(O)—, and a ring sulphur atom may be optionally oxidised to form the S-oxides.
  • Examples and suitable values of the term “3-5-membered heterocyclyl” are pyrrolyl, pyrrolinyl, imidazolyl, thiazolyl and furanyl.
  • a “carbocyclyl” is a saturated, partially saturated or unsaturated, mono or bicyclic carbon ring that contains 3-12 atoms; wherein a —CH 2 — group can optionally be replaced by a —C(O)—.
  • Particularly “carbocyclyl” is a monocyclic ring containing 5 or 6 atoms or a bicyclic ring containing 9 or 10 atoms.
  • Suitable values for “carbocyclyl” include cyclopropyl, cyclobutyl, 1-oxocyclopentyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, phenyl, naphthyl, tetralinyl, indanyl or 1-oxoindanyl.
  • a “3-5-membered carbocyclyl” is a saturated, partially saturated or unsaturated, monocyclic carbon ring that contains 3, 4 or 5 atoms; wherein a —CH 2 — group can optionally be replaced by a —C(O)—.
  • Suitable values for “3-5-membered carbocyclyl” include cyclopropyl, cyclobutyl, 1-oxocyclopentyl, cyclopentyl or cyclopentenyl.
  • C m-n or “C m-n group” used alone or as a prefix, refers to any group having m to n carbon atoms.
  • C 1-6 alkanoyloxy is acetoxy.
  • C 1-6 alkoxycarbonyl include C 1-4 alkoxycarbonyl, methoxycarbonyl, ethoxycarbonyl, n- and t-butoxycarbonyl.
  • Examples of “C 1-6 alkoxy” include C 1-4 alkoxy, C 1-3 alkoxy, methoxy, ethoxy and propoxy.
  • Examples of “C 1-6 alkoxyimino” include C 1-4 alkoxyimino, C 1-3 alkoxyimino, methoxyimino, ethoxyimino and propoxyimino.
  • C 1-6 alkanoylamino examples include formamido, acetamido and propionylamino.
  • Examples of “C 1-6 alkylS(O) a wherein a is 0 to 2” include C 1-4 alkylsulphonyl, methylthio, ethylthio, methylsulphinyl, ethylsulphinyl, mesyl and ethylsulphonyl.
  • Examples of “C 1-6 alkylthio” include methylthio and ethylthio.
  • Examples of “C 1-6 alkylsulphonylamino” examples include methylsulphonylamino and ethylsulphsulphonylamino.
  • Examples of “C 1-6 alkanoyl” include C 1-4 alkanoyl, propionyl and acetyl.
  • Examples of “N—(C 1-6 alkyl)amino” include methylamino and ethylamino.
  • Examples of “N,N—(C 1-6 alkyl) 2 amino” include di-N-methylamino, di-(N-ethyl)amino and N-ethyl-N-methylamino.
  • Examples of “C 2-6 alkenyl” are vinyl, allyl and 1-propenyl.
  • Examples of “C 2-6 alkynyl” are ethynyl, 1-propynyl and 2-propynyl.
  • N—(C 1-6 alkyl)sulphamoyl are N-(methyl)sulphamoyl and N-(ethyl)sulphamoyl.
  • N—(C 1-6 alkyl) 2 sulphamoyl are N,N-(dimethyl)sulphamoyl and N-(methyl)-N-(ethyl)sulphamoyl.
  • N—(C 1-6 alkyl)carbamoyl are N—(C 1-4 alkyl)carbamoyl, methylaminocarbonyl and ethylaminocarbonyl.
  • N,N—(C 1-6 alkyl) 2 carbamoyl are N,N—(C 1-4 alkyl) 2 carbamoyl, dimethylaminocarbonyl and methylethylaminocarbonyl.
  • RT room temperature
  • a suitable pharmaceutically acceptable salt of a compound of the invention is, for example, an acid-addition salt of a compound of the invention which is sufficiently basic, for example, an acid-addition salt with, for example, an inorganic or organic acid, for example hydrochloric, hydrobromic, sulphuric, phosphoric, trifluoroacetic, citric or maleic acid.
  • a suitable pharmaceutically acceptable salt of a compound of the invention which is sufficiently acidic is an alkali metal salt, for example a sodium or potassium salt, an alkaline earth metal salt, for example a calcium or magnesium salt, an ammonium salt or a salt with an organic base which affords a physiologically-acceptable cation, for example a salt with methylamine, dimethylamine, trimethylamine, piperidine, morpholine or tris-(2-hydroxyethyl)amine.
  • an alkali metal salt for example a sodium or potassium salt
  • an alkaline earth metal salt for example a calcium or magnesium salt
  • an ammonium salt or a salt with an organic base which affords a physiologically-acceptable cation
  • a salt with methylamine, dimethylamine, trimethylamine, piperidine, morpholine or tris-(2-hydroxyethyl)amine for example a salt with methylamine, dimethylamine, trimethylamine, piperidine, morpholine or tris-(2-hydroxye
  • a suitable pharmaceutically acceptable salt of a compound of the inventions is a salt formed with an acid selected from: benzoic acid, 2-(benzoylamino)acetic acid, 1,2-ethane disulfonic acid, fumaric acid, maleic acid, mandalic acid, naphthalene-1,5-disulfonic acid, phosphoric acid, succinic acid, sulfuric acid or undec-10-enoic acid.
  • the salt is a phosphate.
  • the salt is a sulphate.
  • the salt is a fumarate.
  • the salt is a maleate.
  • the compounds claimed in this invention are capable of existing in different resonance structures and thus the compounds claimed herein include all possible resonance structures, for example optical isomers, diastereoisomers and geometric isomers and all tautomeric forms of the compounds of the formula (I).
  • Compounds of the present invention may be administered orally, parenteral, buccal, vaginal, rectal, inhalation, insufflation, sublingually, intramuscularly, subcutaneously, topically, intranasally, intraperitoneally, intrathoracially, intravenously, epidurally, intrathecally, intracerebroventricularly and by injection into the joints.
  • the dosage will depend on the route of administration, the severity of the disease, age and weight of the patient and other factors normally considered by the attending physician, when determining the individual regimen and dosage level as the most appropriate for a particular patient.
  • An effective amount of a compound of the present invention for use in therapy of cancer is an amount sufficient to symptomatically relieve in a warm-blooded animal, particularly a human the symptoms of cancer, to slow the progression of cancer, or to reduce in patients with symptoms of cancer the risk of getting worse.
  • inert, pharmaceutically acceptable carriers can be either solid or liquid.
  • Solid form preparations include powders, tablets, dispersible granules, capsules, cachets, and suppositories.
  • a solid carrier can be one or more substance, which may also act as diluents, flavoring agents, solubilizers, lubricants, suspending agents, binders, or tablet disintegrating agents; it can also be an encapsulating material.
  • the carrier is a finely divided solid, which is in a mixture with the finely divided active component.
  • the active component is mixed with the carrier having the necessary binding properties in suitable proportions and compacted in the shape and size desired.
  • a low-melting wax such as a mixture of fatty acid glycerides and cocoa butter is first melted and the active ingredient is dispersed therein by, for example, stirring. The molten homogeneous mixture is then poured into convenient sized molds and allowed to cool and solidify.
  • Suitable carriers include magnesium carbonate, magnesium stearate, talc, lactose, sugar, pectin, dextrin, starch, tragacanth, methyl cellulose, sodium carboxymethyl cellulose, a low-melting wax, cocoa butter, and the like.
  • Some of the compounds of the present invention are capable of forming salts with various inorganic and organic acids and bases and such salts are also within the scope of this invention.
  • acid addition salts include acetate, adipate, ascorbate, benzoate, benzenesulfonate, bicarbonate, bisulfate, butyrate, camphorate, camphorsulfonate, choline, citrate, cyclohexyl sulfamate, diethylenediamine, ethanesulfonate, fumarate, glutamate, glycolate, hemisulfate, 2-hydroxyethylsulfonate, heptanoate, hexanoate, hydrochloride, hydrobromide, hydroiodide, hydroxymaleate, lactate, malate, maleate, methanesulfonate, meglumine, 2-naphthalenesulfonate, nitrate, oxalate, pamoate, persulf
  • Base salts include ammonium salts, alkali metal salts such as sodium, lithium and potassium salts, alkaline earth metal salts such as aluminum, calcium and magnesium salts, salts with organic bases such as dicyclohexylamine salts, N-methyl-D-glucamine, and salts with amino acids such as arginine, lysine, ornithine, and so forth.
  • basic nitrogen-containing groups may be quaternized with such agents as: lower alkyl halides, such as methyl, ethyl, propyl, and butyl halides; dialkyl sulfates like dimethyl, diethyl, dibutyl; diamyl sulfates; long chain halides such as decyl, lauryl, myristyl and stearyl halides; aralkyl halides like benzyl bromide and others.
  • Non-toxic physiologically-acceptable salts are preferred, although other salts are also useful, such as in isolating or purifying the product.
  • the salts may be formed by conventional means, such as by reacting the free base form of the product with one or more equivalents of the appropriate acid in a solvent or medium in which the salt is insoluble, or in a solvent such as water, which is removed in vacuo or by freeze drying or by exchanging the anions of an existing salt for another anion on a suitable ion-exchange resin.
  • a compound of the formula (I) or a pharmaceutically acceptable salt thereof for the therapeutic treatment (including prophylactic treatment) of mammals including humans, it is normally formulated in accordance with standard pharmaceutical practice as a pharmaceutical composition.
  • the pharmaceutical composition of this invention may also contain, or be co-administered (simultaneously or sequentially) with, one or more pharmacological agents of value in treating one or more disease conditions referred to herein.
  • composition is intended to include the formulation of the active component or a pharmaceutically acceptable salt with a pharmaceutically acceptable carrier.
  • this invention may be formulated by means known in the art into the form of, for example, tablets, capsules, aqueous or oily solutions, suspensions, emulsions, creams, ointments, gels, nasal sprays, suppositories, finely divided powders or aerosols or nebulisers for inhalation, and for parenteral use (including intravenous, intramuscular or infusion) sterile aqueous or oily solutions or suspensions or sterile emulsions.
  • Liquid form compositions include solutions, suspensions, and emulsions.
  • Sterile water or water-propylene glycol solutions of the active compounds may be mentioned as an example of liquid preparations suitable for parenteral administration.
  • Liquid compositions can also be formulated in solution in aqueous polyethylene glycol solution.
  • Aqueous solutions for oral administration can be prepared by dissolving the active component in water and adding suitable colorants, flavoring agents, stabilizers, and thickening agents as desired.
  • Aqueous suspensions for oral use can be made by dispersing the finely divided active component in water together with a viscous material such as natural synthetic gums, resins, methyl cellulose, sodium carboxymethyl cellulose, and other suspending agents known to the pharmaceutical formulation art.
  • the pharmaceutical compositions can be in unit dosage form.
  • the composition is divided into unit doses containing appropriate quantities of the active component.
  • the unit dosage form can be a packaged preparation, the package containing discrete quantities of the preparations, for example, packeted tablets, capsules, and powders in vials or ampoules.
  • the unit dosage form can also be a capsule, cachet, or tablet itself, or it can be the appropriate number of any of these packaged forms.
  • anti-cancer treatment may be applied as a sole therapy or may involve, in addition to the compound of the invention, conventional surgery or radiotherapy or chemotherapy.
  • chemotherapy may include one or more of the following categories of anti-tumour agents:
  • antiproliferative/antineoplastic drugs and combinations thereof, as used in medical oncology such as alkylating agents (for example cis-platin, carboplatin, cyclophosphamide, nitrogen mustard, melphalan, chlorambucil, busulphan and nitrosoureas); antimetabolites (for example antifolates such as fluoropyrimidines like 5-fluorouracil and tegafur, raltitrexed, methotrexate, cytosine arabinoside and hydroxyurea); antitumour antibiotics (for example anthracyclines like adriamycin, bleomycin, doxorubicin, daunomycin, epirubicin, idarubicin, mitomycin-C, dactinomycin and mithramycin); antimitotic agents (for example vinca alkaloids like vincristine, vinblastine, vindesine and vinorelbine and taxoids like taxol and
  • Such conjoint treatment may be achieved by way of the simultaneous, sequential or separate dosing of the individual components of the treatment.
  • Such combination products employ the compounds of this invention, or pharmaceutically acceptable salts thereof, within the dosage range described hereinbefore and the other pharmaceutically-active agent within its approved dosage range.
  • the compounds, or pharmaceutically acceptable salts thereof, of the present invention can be prepared in a number of ways well known to one skilled in the art of organic synthesis.
  • the compounds, or pharmaceutically acceptable salts thereof, of the present invention can be synthesized using the methods described below, together with synthetic methods known in the art of synthetic organic chemistry, or variations thereon as appreciated by those skilled in the art. Such methods include, but are not limited to, those described below. All references cited herein are hereby incorporated in their entirety by reference.
  • novel compounds, or pharmaceutically acceptable salts thereof, of this invention may be prepared using the reactions and techniques described herein.
  • the reactions are performed in solvents appropriate to the reagents and materials employed and are suitable for the transformations being effected.
  • all proposed reaction conditions including choice of solvent, reaction atmosphere, reaction temperature, duration of the experiment and workup procedures, are chosen to be the conditions standard for that reaction, which should be readily recognized by one skilled in the art. It is understood by one skilled in the art of organic synthesis that the functionality present on various portions of the molecule must be compatible with the reagents and reactions proposed. Such restrictions to the substituents, which are compatible with the reaction conditions, will be readily apparent to one skilled in the art and alternate methods must then be used.
  • a microwave reaction vessel was charged with [1-(5-fluoro-6-methylpyridin-2-yl)ethyl]amine (Method 13; 159 mg, 1.03 mmol), 2,5-dichloro-4-(5-cyclopropyl-1H-pyrazole-3-ylamino)pyrimidine (Method 7; 335 mg, 1.24 mmol) and DIEA (0.35 ml, 2.0 mmol).
  • Anhydrous n-BuOH (1.5 ml) was added, and the tube was sealed and heated in a microwave reactor at 175° C. for 10 hours. The resulting mixture was partitioned between EtOAc and H 2 O.
  • the column condition were as follows: Chiralcel OJ column, 250 ⁇ 20 mm, 10 ⁇ ; 80% hexane, 20% 1:1 ethanol:methanol, 0.1% diethylamine; flow rate 10 ml/min.
  • Chiralcel OJ column 250 ⁇ 4.6 mm, 10 ⁇ 80% hexane, 20% 1:1 ethanol:methanol, 0.1% diethylamine; flow rate 0.5 ml/min
  • N-(1-(3,5-Difluoropyridin-2-yl)ethyl)acetamide (Method 17; 0.10 g, 0.50 mmol), DMAP (0.0122 g, 0.0999 mmol) and di-tert-butyl dicarbonate (0.218 g, 0.999 mmol) in THF (5 ml) was stirred at 50° C. for 40 hours. After cooling to room temperature, lithium hydroxide monohydrate (0.0335 g, 0.70 mmol) and water (5 ml) was added. The reaction was stirred at room temperature for 55 hours. Ether (20 ml) was added, organic layer was separated, washed with brine (10 ml) and dried over sodium sulfate.
  • Meth Compound m/z SM 38 2,5-Dichloro-N-(5-methyl-1H- 245 5-methyl-1H-pyrazol-3- pyrazol-3-yl)pyrimidin-4-amine amine and 2,4,5- trichloropyrimidine 39 2,5,6-Trichloro-N-(5-methyl-1H- 279 5-methyl-1H-pyrazol-3- pyrazol-3-yl)pyrimidin-4-amine amine and 2,4,5,6- tetrachloropyrimidine
  • the compounds of the present invention have utility for the treatment of cancer by inhibiting the tyrosine kinases, particularly the Trks and more particularly Trk A and B.
  • Methods of treatment target tyrosine kinase activity, particularly the Trk activity and more particularly Trk A and B activity, which is involved in a variety of cancer related processes.
  • inhibitors of tyrosine kinase are expected to be active against neoplastic disease such as carcinoma of the breast, ovary, lung, colon, prostate or other tissues, as well as leukemias and lymphomas, tumours of the central and peripheral nervous system, and other tumour types such as melanoma, fibrosarcoma and osteosarcoma.
  • Tyrosine kinase inhibitors, particularly the Trk inhibitors and more particularly Trk A and B inhibitors are also expected to be useful for the treatment other proliferative diseases including but not limited to autoimmune, inflammatory, neurological, and cardiovascular diseases.
  • the compounds of the invention are expected to be of value in the treatment or prophylaxis of cancers selected with up regulated of constitutively activated Trk kinases, including but not limited to, oncogenic rearrangements leading to ETV6-TrkC fusions, TRP-TrkA fusions proteins, AML-ETO (t8;21), autocrine or paracrine signalling leading to elevated serum levels of NGF, BDNF, neurotrophins or tumours with constitutively active Trk associated with disease aggressiveness, tumour growth and proliferation or survival signalling.
  • constitutively activated Trk kinases including but not limited to, oncogenic rearrangements leading to ETV6-TrkC fusions, TRP-TrkA fusions proteins, AML-ETO (t8;21), autocrine or paracrine signalling leading to elevated serum levels of NGF, BDNF, neurotrophins or tumours with constitutively active Trk associated with disease aggressiveness, tumour growth and proliferation or survival signalling.
  • Trk A kinase activity was measured for its ability to phosphorylate synthetic tyrosine residues within a generic polypeptide substrate using an Amplified Luminescent Proximity Assay (Alphascreen) technology (PerkinElmer, 549 Albany Street, Boston, Mass.).
  • Trk A kinase activity To measure Trk A kinase activity, the intracellular domain of a HIS-tagged human Trk A kinase (amino acids 442-796 of Trk A, Swiss-Prot Primary Accession Number P04629) was expressed in SF9 cells and purified using standard nickel column chromatography. After incubation of the kinase with a biotinylated substrate and adenosine triphosphate (ATP) for 20 minutes at room temperature, the kinase reaction was stopped by the addition of 30 mM ethylenediaminetetraacetic acid (EDTA).
  • EDTA ethylenediaminetetraacetic acid
  • reaction was performed in 384 well microtitre plates and the reaction products were detected with the addition of strepavidin coated Donor Beads and phosphotyrosine-specific antibodies coated Acceptor Beads using the EnVision Multilabel Plate Reader after an overnight incubation at room temperature.
  • Trk inhibitory activity of the following examples was measured at the following IC 50 s.

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