Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D495/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
  • C07D495/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
  • C07D495/04—Ortho-condensed systems
• • 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
  • A61P35/00—Antineoplastic agents
• • 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
  • A61P9/00—Drugs for disorders of the cardiovascular system
• • 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
  • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
  • C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
  • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
  • C07D403/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond

Definitions

• the present invention relates to heterocyclic compounds, their compositions and medicaments containing the same, as well as processes for the preparation and use of such compounds, compositions and medicaments.
• Such compounds are potentially useful in the treatment of diseases associated with inappropriate tyrosine and/or serine/threonine kinase activity.
• Protein kinases serve to catalyze the phosphorylation of an amino acid side chain in various proteins by the transfer of the ⁇ -phosphate of the ATP- Mg 2+ complex to said amino acid side chain. These enzymes control the majority of the signaling processes inside cells, thereby governing cell function, growth, differentiation and destruction (apoptosis) through reversible phosphorylation of the hydroxyl groups of serine, threonine and tyrosine residues in proteins. Studies have shown that protein kinases are key regulators of many cell functions, including signal transduction, transcriptional regulation, cell motility, and cell division.
• the protein kinase family of enzymes is typically classified into two main subfamilies: Protein Tyrosine Kinases and Protein Serine/Threonine Kinases, based on the amino acid residue they phosphorylate.
• the serine/threonine kinases includes cyclic AMP- and cyclic GMP- dependent protein kinases, calcium- and phospholipid-dependent protein kinase, calcium- and calmodulin-dependent protein kinases, casein kinases, cell division cycle protein kinases and others. These kinases are usually cytoplasmic or associated with the particulate fractions of cells, possibly by anchoring proteins.
• tyrosine kinases phosphorylate tyrosine residues.
• Tyrosine kinases play an equally important role in cell regulation. These kinases include several receptors for molecules such as growth factors and hormones, including epidermal growth factor receptor, insulin receptor, platelet derived growth factor receptor and others.
• tyrosine kinases are transmembrane proteins with their receptor domains located on the outside of the cell and their kinase 5 domains on the inside. Much work is also under progress to identify modulators of tyrosine kinases as well.
• RhoA is a small GTP binding protein that can be activated by several extracellular stimuli such as growth factor, hormones, mechanic stress, osmotic change as well as high concentration of metabolite like glucose. RhoA activation involves GTP binding, conformation alteration, post- translational modification (geranylgeranyllization and famesylation) and activation of its intrinsic GTPase activity. Activated RhoA is capable of interacting with several effector proteins including ROCKs and transmit signals into cellular cytoplasm and nucleus.
• ROCK1 and 2 constitute a family of kinases that can be activated by RhoA-GTP complex via physical association. Activated ROCKs phosphorylate a number of substrates and play important roles in pivotal cellular functions.
• the substrates for ROCKs include myosin binding subunit of myosin light chain phosphatase (MBS, also named MYPT1 ), adducin, moesin, myosin light chain (MLC), LEVI kinase as well as transcription factor FHL.
• MCS myosin binding subunit of myosin light chain phosphatase
• MLC myosin light chain
• LEVI kinase as well as transcription factor FHL.
• the phosphorylation of theses substrates modulate the biological activity of the proteins and thus provide a means to alter cell's response to external stimuli.
• ROCK in smooth muscle contraction.
• RhoA kinase activity of ROCK1 and which in turn phosphorylates MBS.
• MLCK calcium-dependent myosin light chain kinase
• ROCKs have also been shown to be involved in cellular functions including apoptosis, cell migration, transcriptional activation, fibrosis, cytokinesis, inflammation and cell proliferation.
• ROCK plays a critical role in the inhibition of axonal growth by myelin-associated inhibitory factors such as i myelin-associated glycoprotein (MAG).
• MAG myelin-associated glycoprotein
• ROCK- activity also mediates the collapse of growth cones in developing neurons. Both processes are thought to be mediated by ROCK-induced phosphorylation of substrates such as LEVI kinase and myosin light chain phosphatase, resulting in increased contractility of the neuronal actin-myosin system.
• Inhibitors of ROCKs have been suggested for use in the treatments of a variety of diseases. They include cardiovascular diseases such as hypertension, chronic and congestive heart failure, cardiac hypertrophy, restenosis, chronic renal failure and atherosclerosis. In addition, because of its muscle relaxing properties, it is also suitable for asthma, male erectile dysfunctions, female sexual dysfunction and over-active bladder syndrome. ROCK inhibitors have been shown to possess anti-inflammatory properties. Thus they can be used as treatment for neuroinflammatory diseases such as stroke, multiple sclerosis, Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis and inflammatory pain, as well as other inflammatory diseases such as rheumatoid arthritis, irritable bowel syndrome, inflammatory bowel disease.
• cardiovascular diseases such as hypertension, chronic and congestive heart failure, cardiac hypertrophy, restenosis, chronic renal failure and atherosclerosis.
• ROCK inhibitors have been shown to possess anti-inflammatory properties. Thus they can be used as treatment for neuroinflammatory diseases such as stroke, multiple sclerosis,
• ROCK inhibitors could be useful drugs for neuronal regeneration, inducing new axonal growth and axonal rewiring across lesions within the CNS.
• ROCK inhibitors are therefore likely to be useful for regenerative (recovery) treatment of CNS disorders such as spinal cord injury, acute neuronal injury (stroke, traumatic brain injury), Parkinson' s disease, Alzheimer' s disease and other neurodegenerative disorders.
• CNS disorders such as spinal cord injury, acute neuronal injury (stroke, traumatic brain injury), Parkinson' s disease, Alzheimer' s disease and other neurodegenerative disorders.
• ROCK inhibitors reduce cell proliferation and cell migration, they could be useful in treating cancer and tumor metastasis.
• ROCK inhibitors suppress cytoskeletal rearrangement upon virus invasion, thus they also have potential therapeutic value in antiviral and anti-bacterial applications.
• ROCK inhibitors may also be useful for the treatment of insulin resistance and diabetes.
• the inventors have discovered novel heterocyclic compounds, which are inhibitors of ROCK activity. Such derivatives are useful in the treatment of disorders associated with inappropriate ROCK activity.
• the present invention is directed to a compound of Formula I:
• A is indazol-3-yl, pyrazol-4-yl, ? wherein (i) G is CR' or N; (ii) X is hydrogen, Ci -6 alkyl, C3-7 cycloalkyl, -OR 2 or - R 3 R 4 ; and (iii) R', R", R 2 , R 3 and R 4 are independently -H or Ci -6 alkyl or , C 3-7 cycloalkyl;
• Z is selected from the group consisting of:
• R 5 is -H, Ci -6 alkyl or C3-7 cycloalkyl
• R 7 and R 8 are independently -H, halo, Ci -6 alkyl, C 3-7 cycloalkyl, -0-(Ci -6 alkyl), -OH, -CN, -COOR, -OC(0)R, NHR', N(R) 2 , -NHC(0)R, -NHS(0) 2 R', -C(0)NHR', or -S(0) 2 R' wherein R is -H, Ci -6 alkyl, or C 3-7 cycloalkyl;
• G h G 2 and G 3 are independently CH or N.
• Z' is a bond, O or NR 6 , wherein R 6 is -H, Ci -6 alkyl or C 3-7 cycloalkyl;
• R is -H, Ci -6 alkyl or C 3-7 cycloalkyl
• Ri is -H or Ci -6 alkyl
• Q is a bond or Ci -6 alkyl
• J is a bond or Ci -6 alkyl
• W is -H , -OR 9 , -NRioRii, or -S(0) m Ri 2 , wherein (i) R 9 , Ri 0 and R n are independently -H, Ci -6 alkyl, C 3-7 cycloalkyl, formyl, Ci -6 alkylcarbonyl, C 3-7 cycloalkylcarbonyl, or Ci -6 alkylsulfonyl; (ii) m is an integer from 0 to 2; and (iii) Ri 2 is Ci -6 alkyl or C 3-7 cycloalkyl; and
• Ar is a phenyl, naphthyl, or C5-10 heterocycle, each of which is optionally substituted with halo, -OH, -CN, -COOR a , -OR a , -SR a , -OC(0)R a , -NHR a , -NR a R b , -NHC(0)R a , -NHC(0)NR a R b , - C(0)NR a R b , -NS(0) 2 R a , -S(0) 2 NR a R b , -S(0) 2 R a , guanidino, nitro, nitroso, Ci -6 alkyl, aryl, C 3-7 cycloalkyl, or 3- to 10-membered heterocycle, wherein the Ci -6 alkyl, aryl, C 3-7 cycloalkyl, or 3- to 10-membered heterocycle, wherein the Ci -6 alkyl, aryl,
• the present invention is directed to a compound of Formula II:
• G is CR' or N;
• X is hydrogen, Ci -6 alkyl, C 3-7 cycloalkyl, -OR 2 or -NR 3 Ri; and
• R', R", R 2 , R 3 and R 4 are independently -H or Ci -6 alkyl or , C 3-7 cycloalkyl;Z is selected from the group consisting of:
• R 5 is -H, Ci -6 alkyl or C3-7 cycloalkyl
• R 7 and R 8 are independently -H, halo, Ci -6 alkyl, C 3-7 cycloalkyl, -0-(Ci -6 alkyl), -OH, -CN, -COOR, -OC(0)R, NHR', N(R) 2 , -NHC(0)R, -NHS(0) 2 R', -C(0)NHR, or -S(0) 2 R' wherein R is -H, Ci -6 alkyl, or C 3-7 cycloalkyl;
• G 2 , G 3 and G 4 are independently CH or N.
• Z' is a bond, O or NR 6 , wherein R 6 is -H, Ci -6 alkyl or C 3-7 cycloalkyl;
• R is -H, Ci -6 alkyl or C 3-7 cycloalkyl
• Ri is -H or Ci -6 alkyl
• Q is a bond or Ci -6 alkyl
• J is a bond or Ci-6 alkyl
• W is -H , -OR 9 , -NR 10 R 11 , or -S(0) m Ri 2 , wherein (i) R 9 , Ri 0 and R n are independently -H, Ci -6 alkyl, C 3-7 cycloalkyl, formyl, Ci -6 alkylcarbonyl, C 3-7 cycloalkylcarbonyl, or Ci -6 alkylsulfonyl; (ii) m is an integer from 0 to 2; and (iii) Ri 2 is Ci -6 alkyl or C 3-7 cycloalkyl; and
• Ar is a phenyl, naphthyl, or C5- 10 heterocycle, each of which is optionally substituted with halo, -OH, -CN, -COOR a , -OR a , -SR a , -OC(0)R a , -NHR a , -NR a R b , -NHC(0)R a , -NHC(0)NR a R b , - C(0)NR a R b , -NS(0) 2 R a , -S(0) 2 NR a R b , -S(0) 2 R a , guanidino, nitro, nitroso, Ci -6 alkyl, aryl, C 3-7 cycloalkyl, or 3- to 10-membered heterocycle, wherein the Ci -6 alkyl, aryl, C 3-7 cycloalkyl, or 3- to 10-membered heterocycle, wherein the Ci -6 alkyl, aryl
• the present invention is directed to a compound of Formula III:
• X is hydrogen, Ci -6 alkyl, C 3-7 cycloalkyl, -OR 2 or - R 3 R 4 ; and (iii) R', R", R 2 , R 3 and R 4 are independently -H or Ci -6 alkyl or , C 3-7 cycloalkyl;
• G 5 , G 6 and G 7 are independently CH or N.
• Z' is a bond, O or R 6 , wherein R 6 is -H, Ci -6 alkyl or C 3-7 cycloalkyl;
• R is -H, Ci -6 alkyl or C 3-7 cycloalkyl
• Ri is -H or Ci -6 alkyl
• Q is a bond or Ci -6 alkyl
• J is a bond or Ci-6 alkyl
• W is -H , -OR 9 , - R 10 R 11 , or -S(0) m Ri 2 , wherein (i) R 9 , Ri 0 and R n are independently -H, Ci -6 alkyl, C 3-7 cycloalkyl, formyl, Ci -6 alkylcarbonyl, C 3-7 cycloalkylcarbonyl, or Ci -6 alkylsulfonyl; (ii) m is an integer from 0 to 2; and (iii) Ri 2 is Ci -6 alkyl or C 3-7 cycloalkyl; and
• Ar is a phenyl, naphthyl, or C5- 10 heterocycle, each of which is optionally substituted with halo, -OH, -CN, -COOR a , -OR a , -SR a , -OC(0)R a , -NHR a , -NR a R b , -NHC(0)R a , -NHC(0)NR a R b , - C(0)NR a R b , -NS(0) 2 R a , -S(0) 2 NR a R b , -S(0) 2 R a , guanidino, nitro, nitroso, Ci -6 alkyl, aryl, C 3-7 cycloalkyl, or 3- to 10-membered heterocycle, wherein the Ci -6 alkyl, aryl, C 3-7 cycloalkyl, or 3- to 10-membered heterocycle, wherein the Ci -6 alkyl, aryl
• the present invention is directed to a compound of Formula I, II, and/or III selected from the roup consisting of:
• the present invention is also directed to a compound of Formula V:
• A is indazol-3-yl, pyrazol-4-yl or , wherein (i) G is CH or N; and (ii) X is hydrogen, -OR 2 or -NR 3 R 4 , wherein each of R 2 , R 3 and R4 is independently -H or Ci -6 alkyl; each of Ri 3 and R14 is independently -H, halo, Ci -6 alkyl, or C 3-7 cycloalkyl;
• each of R i5 and R 20 is independently-H, halo, -OH, -CN, -COOR, -OR', -SR', -OC(0)R, - NHR', -NR'R", -NHC(0)R', -NHC(0)NR'R", -C(0)NR'R", -NS(0) 2 R', -S(0) 2 NR'R", - S(0) 2 R', guanidino, nitro, nitroso, Ci -6 alkyl, aryl, C 3-7 cycloalkyl, and 3- to 10-membered heterocycle, wherein each of the Ci -6 alkyl, aryl, C 3-7 cycloalkyl, or 3- to 10-membered heterocycle independently is unsubstituted or substituted with one or more of halo, -OH, -CN, - COOR, -OR', -SR', -OC(0)R, -NHR', -NR'R", -NH
• each of Ri6, R 17 , Ris and R1 is independently -H, Ci -6 alkyl, aryl, C 3-7 cycloalkyl, or 3 to 10- membered heterocycle; wherein the Ci -6 alkyl, aryl, C 3-7 cycloalkyl, or 3- to 10-membered heterocycle is unsubstituted or substituted with one or more of halo, -OH, -CN, -COOR a , -OR a , - SR a , -OC(0)R a , -NHR a , -NR a Rb, -NHC(0)R a , -NHC(0)NR a R , -C(0)NR a R , -NS(0) 2 R a , - S(0) 2 NR a R b , -S(0) 2 R a , guanidino, nitro, nitroso, Ci -6 alkyl, aryl, C 3-7 cyclo
• J is a bond or Ci-6 alkyl.
• A is pyrazol-4-yl. In other aspects, A is pyridine-4-yl. In one aspect, the present invention relates to a compound of Formula II wherein both Ri 3 and R i4 are methyl. In some embodiments, the present invention is directed to a compound of Formula V is selected from the group consisting of:
• the present invention provides a compound as disclosed herein for use in treating a disease related to upregulation of Rho kinase- signaling pathways.
• the present invention is directed to a method of treating an autoimmune disorder in a subject comprising: administering to the subject a therapeutically effective amount of a compound disclosed herein.
• the autoimmune disorder is rheumatoid arthritis, multiple sclerosis, systemic lupus erythematosus (SLE), psoriasis, Crohn's disease, atopic dermatitis, eczema, or graft- versus-host disease (GVHD).
• the present invention provides a method of treating a cardiovascular disorder in a subject comprising: administering to the subject a therapeutically effective amount of a compound disclosed herein.
• the cardiovascular disorder is hypertension, atherosclerosis, restenosis, cardiac hypertrophy, ocular hypertension, cerebral ischemia, cerebral vasospasm, or erectile dysfunction.
• the present invention provides a method of treating inflammation in a subject comprising: administering to the subject a therapeutically effective amount of a compound disclosed herein.
• the inflammation is asthma, cardiovascular inflammation, renal inflammation or arteriosclerosis.
• the present invention provides a method of treating a central nervous system disorder in a subject comprising: administering to the subject a therapeutically effective amount of a compound disclosed herein.
• the central nervous system disorder is neuronal degeneration or spinal cord injury.
• the central nervous system disorder is Huntington's disease, Parkinson's Disease, Alzheimer's, Amyotrophic lateral sclerosis (ALS), or multiple sclerosis.
• the present invention also provides a method of treating an arterial thrombotic disorder in a subject comprising: administering to the subject a therapeutically effective amount of a compound disclosed herein.
• the arterial thrombotic disorder is platelet aggregation, or leukocyte aggregation.
• the present invention relates to a method of treating a fibrotic disorder in a subject comprising: administering to the subject a therapeutically effective amount of a compound disclosed herein.
• the fibrotic disorder is liver fibrosis, lung fibrosis, or kidney fibrosis.
• the present invention also relates to a method of treating glaucoma or regulating intraocular pressure in a subject comprising administering to the subject a therapeutically effective amount of a compound disclosed herein.
• the glaucoma is primary open-angle glaucoma, acute angle-closure glaucoma, pigmentary glaucoma, congenital glaucoma, normal tension glaucoma, or secondary glaucoma.
• the present invention is directed to a method of treating a neoplastic disease in a subject comprising: administering to the subject a therapeutically effective amount of a compound disclosed herein.
• the neoplastic disorder is a lymphoma, carcinoma, leukemia, sarcoma, or blastoma.
• the neoplastic disorder is squamous cell cancer, small- cell king cancer, pituitary cancer, esophageal cancer, astrocytoma, soft tissue sarcoma, non- small cell lung cancer, adenocarcinoma of the king, squamous carcinoma of the king, cancer of the peritoneum, hepatocellular cancer, gastrointestinal cancer, pancreatic cancer, glioblastoma, cervical cancer, ovarian cancer, liver cancer, bladder cancer, hepatoma, breast cancer, colon cancer, colorectal cancer, endometrial or uterine carcinoma, salivary gland carcinoma, kidney cancer, liver cancer, prostate cancer, vulval cancer, thyroid cancer, hepatic carcinoma, brain cancer, endometrial cancer, testis cancer, cholangiocarcinoma, gallbladder carcinoma, gastric cancer, melanoma, or head and neck cancer.
• the present invention provides a method of treating metabolic syndrome, insulin resistance, hyperinsulinemia, type 2 diabetes, or glucose intolerance in a subject comprising administering to the subject a therapeutically effective amount of a compound disclosed herein.
• the present invention relates to a method of treating osteoporosis or promoting bone formation in a subject comprising administering to the subject a therapeutically effective amount of a compound disclosed herein.
• the present invention relates to a method of treating an ocular disorder having an angiogenic component comprising administering to the subject a therapeutically effective amount of a compound disclosed herein and an angiogenesis inhibitor.
• the ocular disorder is age related macular degeneration (AMD), choroidal neovascularization (CNV), diabetic macular edema (DME), iris neovascularization, uveitis, neo vascular glaucoma, or retinitis of prematurity (ROP).
• substitution includes the implicit proviso that such substitution is in accordance with permitted valence of the substituted atom and the substituent, and that the substitution results in a stable compound, e.g., which does not spontaneously undergo transformation such as by rearrangement, cyclization, elimination, etc.
• substituted is contemplated to include all permissible substituents of organic compounds.
• permissible substituents include acyclic and cyclic, branched and unbranched, carbocyclic and heterocyclic, aromatic and non-aromatic substituents of organic compounds.
• Illustrative substituents include, for example, those described herein below.
• alkyl refers to a straight or branched saturated group derived from the removal of a hydrogen atom from an alkane.
• Representative straight chain alkyl groups include -methyl, -ethyl, -n-propyl, -n-butyl, -n-pentyl, and n-heptyl.
• Representative branched alkyl groups include -isopropyl, -sec-butyl, -isobutyl, -tert-butyl, - isopentyl, -neopentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 1,1-dimethylpropyl and 1,2- dimethylpropyl.
• halo groups include any halogen. Examples include but are not limited to -F, - CI, -Br, or -I.
• a Ci-C 6 alkyl group includes any straight or branched, saturated or unsaturated, substituted or unsubstituted hydrocarbon comprised of between one and six carbon atoms.
• Examples of -Ci-C 6 alkyl groups include, but are not limited to methyl, ethyl, propyl, isopropyl, butyl, sec- butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, isohexyl, neohexyl, ethyl enyl, propyl enyl, 1- butenyl, 2-butenyl, 1-pentenyl, 2-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, acetylenyl, pentynyl, 1 -butynyl, 2-butynyl, 1-pentynyl, 2-pentynyl, 1-hexynyl, 2-hexynyl and 3-hexynyl groups.
• Substituted -Ci-C 6 alkyl groups may include any applicable chemical moieties. Examples of groups that may be substituted onto any of the above listed -Ci-C 6 alkyl groups include but are not limited to the following examples: halo, -Ci-C 6 alkyl, -0-(Ci-C 6 alkyl), C3-C7 cycloalkyl, -OH, -CN, -COOR', -OC(0)R, - HR, N(R) 2 ,- HC(0)R or -C(0) HR groups.
• R may be -H, any -Ci-C 6 alkyl, or two R' may, optionally with a nitrogen or an oxygen atom which they are bound to, form a 3-, 4-, 5-, 6-, 7- membered ring system when the substitution is -N(R') 2 ;
• An aryl group includes any unsubstituted or substituted phenyl or napthyl group.
• groups that may be substituted onto ay aryl group include, but are not limited to: halo, -Ci-C 6 alkyl, -0-(Ci-C 6 alkyl), -OH, -CN, -COOR, -OC(0)R, NHR', N (R) 2,- NHC(O), R, or - C(0)NEtR.
• the group denoted R may be -H or any -Ci-C 6 alkyl.
• a C3-C7 cycloalkyl group includes any 3-, 4-, 5-, 6-, or 7-membered substituted or unsubstituted non-aromatic carbocyclic ring.
• Examples of C3-C7 cycloalkyl groups include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclopentadienyl, cyclohexyl, cyclohexenyl, cycloheptyl, cycloheptanyl, l,3-cyclohexadienyl,-l, 4- cyclohexadienyl,-l , 3-cycloheptadienyl, and-1,3, 5-cycloheptatrienyl groups.
• Examples of groups that may be substituted onto C3-C7 cycloalkyl groups include, but are not limited to: -halo, -Ci-C 6 alkyl, -0-(Ci-C 6 alkyl), -OH, -CN, -COOR, -OC(O) R, NHR', N(R')2, -NHC(0)R or -C(0)NHR groups.
• the groups denoted R above include an -H or any unsubstituted -Ci-C 6 alkyl, examples of which are listed above.
• Halo groups include any halogen. Examples include but are not limited to -F, -CI, -Br, or -I.
• a heterocycle may be any optionally substituted saturated, unsaturated or aromatic cyclic moiety wherein said cyclic moiety is interrupted by at least one heteroatom selected from oxygen (O) , sulfur (S) or nitrogen (N) .
• Heterocycles may be monocyclic or polycyclic rings.
• suitable substituents include halogen, halogenated CI -6 alkyl, halogenated CI -6 alkoxy, amino, amidino, amido, azido, cyano, guanidino, hydroxyl, nitro, nitroso, urea, OS(0) 2 R; OS(0) 2 OR, S(0) 2 OR S(O) 0-2 R, C(0)OR wherein R may be H, Ci-C 6 alkyl, aryl or 3 to 10 membered heterocycle) OP(0)ORiOR 2 , P(0)ORiOR 2 , S0 2 RiR 2 , RiS0 2 R 2 C(Ri) R 2 C(Ri)NOR 2 , Rl and R2 may be independently H, Ci-C 6 alkyl, aryl or 3 to 10 membered heterocycle), RiC(0)R 2 , RiC(0)OR 2 , R 3 C(0) R 2 Ri, C(0) RiR 2 , OC(0) RiR 2 .
• R b R 2 and R 3 are each independently selected from H, Ci-C 6 alkyl, aryl or 3 to 10 membered heterocycle or Ri and R 2 are taken together with the atoms to which they are attached to form a 3 to 10 membered heterocycle.
• Possible substituents of heterocycle groups include halogen (Br, CI, I or F), cyano, nitro, oxo, amino, Cl-4 alkyl (e.g., CH 3 , C 2 H 5 , isopropyl) Ci -4 alkoxy (e.g., OCH 3 , OC 2 H 5 ), halogenated Ci.
• alkyl e.g., CF 3 , CHF 2
• halogenated C M alkoxy e.g., OCF 3 , OC 2 F 5
• heterocycles include but are not limited to azepinyl, aziridinyl, azetyl, azetidinyl, diazepinyl, dithiadiazinyl , dioxazepinyl, dioxolanyl, dithiazolyl, furanyl, isooxazolyl, isothiazolyl, imidazolyl, morpholinyl, mo holino, oxetanyl , oxadiazolyl, oxiranyl, oxazinyl, oxazolyl, piperazinyl, pyrazinyl, pyridazinyl, pyrimidinyl, piperidyl, piperidino, pyridyl, pyranyl, pyrazolyl, pyrrolyl, pyrrolidinyl, thiatriazolyl, tetrazolyl, thiadiazolyl, triazolyl, thiazo
• the invention further encompasses any other physiochemical or sterochemical form that the compound may assume.
• forms include diastereomers, racemates, isolated enantiomers, hydrated forms, solvated forms, any known or yet to be disclosed crystalline or amorphous form including all polymorphic crystalline forms.
• Amorphous forms lack a distinguishable crystal lattice and therefore lack an orderly arrangement of structural units.
• Many pharmaceutical compounds have amorphous forms. Methods of generating such chemical forms will be well known by one with skill in the art.
• carbon atom bearing Ri and -QW in Formula I may have "S" or "R” configuration. All diastereomers, racemates, and isolated enantiomers are within the scope of the invention.
• Racemates, individual enantiomers, or diasteromers of the compound may be prepared by specific synthesis or resolution through any method now known or yet to be disclosed.
• the compound may be resolved into it enantiomers by the formation of diasteromeric pairs through salt formation using an optically active acid. Enantiomers are fractionally crystallized and the free base regenerated.
• enantiomers may be separated by chromatography. Such chromatography may be any appropriate method now known or yet to be disclosed that is appropriate to separate enantiomers such as UPLC on a chiral column.
• Tautomers include any structural isomers of different energies that have a low energy barrier to interconversion.
• proton tautomers prototropic tautomers.
• the interconversions occur via the migration of a proton.
• prototropic tautomers include, but are not limited to keto-enol and imine-enamine isomerizations.
• proton migration between the 1 -position, 2-amino and 3- position nitrogen atoms of a 2-aminobenzimidazole ring may occur.
• Formulas Ila, lib nd lie are tautomeric forms of each other:
• Formulas Ilia and Illb are tautomeric forms of each other:
• the compound is in the form of a pharmaceutically acceptable salt.
• Pharmaceutically acceptable salts include any salt derived from an organic or inorganic acid. Examples of such salts include but are not limited to the following: salts of hydrobromic acid, hydrochloric acid, nitric acid, phosphoric acid and sulphuric acid.
• Organic acid addition salts include, for example, salts of acetic acid, benzenesulphonic acid, benzoic acid, camphorsulphonic acid, citric acid, 2- (4-chlorophenoxy)-2- methylpropionic acid, 1, 2- ethanedisulphonic acid, ethanesulphonic acid, ethylenediaminetetraacetic acid (EDTA), fumaric acid, glucoheptonic acid, gluconic acid, glutamic acid, N-glycolylarsanilic acid, 4- hexylresorcinol, hippuric acid, 2- (4-hydroxybenzoyl) benzoicacid, l-hydroxy-2-naphthoicacid, 3 -hydroxy- 2-naphthoic acid, 2 -hydroxy ethanesulphonic acid, lactobionic acid, n-dodecyl sulphuric acid, maleic acid, malic acid, mandelic acid, methanesulphonic acid, methyl
• the compounds of the present invention cause kinase inhibition in vitro and/or in vivo.
• Methods of determining kinase inhibition are well known in the art.
• kinase activity of an enzyme and the inhibitory capacity of a test compound can be determined by measuring enzyme specific phosphorylation of a substrate.
• Commercial assays and kits can be employed.
• kinase inhibition can be determined using an EVIAP® assay (Molecular Devices). This assay method involves the use of a fluorescently- tagged peptide substrate.
• Phosphorylation of the tagged peptide by a kinase of interest promotes binding of the peptide to a trivalent metal-based nanoparticle via the specific, high affinity interaction between the phospho- group and the trivalent metal. Proximity to the nanoparticle results in increased fluorescence polarization. Inhibition of the kinase by a kinase inhibitor prevents phosphorylation of the substrate and thereby limits binding of the fluorescently-tagged substrate to the nanoparticle.
• Such an assay can be compatible with a microwell assay format, allowing simultaneous determination of IC 50 of multiple compounds.
• a method of treating a patient suffering from a disease comprising administering to a patient in need of such treatment a therapeutically effective amount of a compound of the present invention.
• therapeutically-effective amount means that amount of a compound, material, or composition comprising a compound of the present invention which is effective for producing some desired therapeutic effect in at least a sub -population of cells in an animal at a reasonable benefit/risk ratio applicable to any medical treatment, e.g., reasonable side effects applicable to any medical treatment.
• Compounds of the invention are useful for treatment of patients suffering from cardiovascular and non-cardiovascular diseases, such as hypertension, pulmonary hypertension, atherosclerosis, restenosis, coronary heart disease, cardiac hypertrophy, ocular hypertension, retinopathy, ischemic diseases, cerebral ischemia, cerebral vasospasm, penile erectile dysfunction, peripheral circulatory disorder, peripheral artery occlusive disease, glaucoma, (e.g., regulating intraocular pressure), fibroid lung, fibroid liver, fibroid kidney, chronic obstructive pulmonary disease (COPD), adult respiratory distress syndrome, central nervous system disorders such as neuronal degeneration and spinal cord injury.
• cardiovascular and non-cardiovascular diseases such as hypertension, pulmonary hypertension, atherosclerosis, restenosis, coronary heart disease, cardiac hypertrophy, ocular hypertension, retinopathy, ischemic diseases, cerebral ischemia, cerebral vasospasm, penile erectile dysfunction, peripheral circulatory disorder
• CCMs cerebral cavernous malformation
• CCMs are vascular lesions consisting of clusters of leaky, dilated capillaries and are associated with central nervous system (CNS) disorders, including seizures and stroke.
• CNS central nervous system
• the loss of vascular integrity is thought to involve activation of RhoA and activation of ROCK, leading to changes in cytoskeletal stability and increased vascular permeability.
• the compounds of the invention inhibit ROCK activation and restore vascular endothelial function.
• the compounds of the invention can also be used to treat glaucoma. There are several types of glaucoma which can be treated, including, without limitation, the following types.
• the two most common, primary open-angle glaucoma and acute angle-closure glaucoma are characterized by high ocular pressure.
• Pigmentary glaucoma and congenital glaucoma also are characterized by reduced fluid outflow and high intraocular pressure (IOP).
• IOP intraocular pressure
• Normal tension glaucoma is thought to be due to another mechanism, in particular poor blood flow to the optic nerve.
• Secondary glaucoma can result from injury, infection, inflammation, tumor or cataracts, and is also associated with prolonged use of steroids, systemic hypertension, diabetic retinopathy, and central retinal vein occlusion.
• the compounds of the invention are used to treat inflammation, including, but not limited to asthma, cardiovascular inflammation, renal inflammation, atherosclerosis and arteriosclerosis.
• Neoplastic diseases include any malignant growth or tumor caused by abnormal or uncontrolled cell division, and may spread to other parts of the body through the lymphatic system or the blood stream
• Neoplastic disease includes, without limitation, lymphoma (a neoplasm of lymph tissue that is usually malignant), carcinoma (any malignant tumor derived from epithelial tissue), leukemia (malignant neoplasm of blood-forming tissues; characterized by abnormal proliferation of leukocytes), sarcoma (a usually malignant tumor arising from connective tissue (bone or muscle etc.), and blastoma (malignancy in precursor cells).
• Non-limiting examples include squamous cell cancer, small-cell lung cancer, pituitary cancer, esophageal cancer, astrocytoma, soft tissue sarcoma, non-small cell king cancer, adenocarcinoma of the lung, squamous carcinoma of the king, cancer of the peritoneum, hepatocellular cancer, gastrointestinal cancer, pancreatic cancer, glioblastoma, cervical cancer, ovarian cancer, liver cancer, bladder cancer, hepatoma, breast cancer, colon cancer, colorectal cancer, endometrial or uterine carcinoma, salivary gland carcinoma, kidney cancer, liver cancer, prostate cancer, vulval cancer, thyroid cancer, hepatic carcinoma, brain cancer, endometrial cancer, testis cancer, cholangiocarcinoma, gallbladder carcinoma, gastric cancer, melanoma, and various types of head and neck cancer.
• the inventive compounds are used to effect weight loss and/or limit weight gain.
• the compound is ROCK2 selective.
• ROCK- 2 inhibitors promote weight loss in normal subjects, and limit weight gain in subj ects prone to obesity.
• the inventive compound is used to reduce or prevent insulin resistance or restore insulin sensitivity.
• the compounds of the invention are used to promote or restore insulin- dependent glucose uptake.
• a compound of the invention is used to promote or restore glucose tolerance.
• a compound of the invention is used to treat metabolic syndrome.
• a compound of the invention is used to reduce or prevent hyperinsulinemia.
• an inventive compound is used to treat diabetes (particularly type 2 diabetes).
• Compounds of the invention may also be used to promote or restore insulin-mediated relaxation of vascular smooth muscle cells (VSMCs).
• VSMCs vascular smooth muscle cells
• the invention provides methods and compounds for treating diseases and disorders with an angiogenic component.
• diseases and disorders are treated by administering to a subj ect an effective amount of a rho kinase inhibitor.
• the inventive compound is a ROCK2 selective inhibitor.
• diseases and disorders can also be treated by administering an effective amount of a rho kinase inhibitor that inhibits ROCK2, and may be ROCK2 selective, and an effective amount of angiogenesis inhibitor.
• ocular diseases and disorders having an angiogenic component are treated in this manner.
• the invention provides a method of treating age related macular degeneration (AMD), which occurs in “dry” and “wet” forms.
• AMD age related macular degeneration
• the "wet” form of AMD causes vision loss due to abnormal blood vessel growth (neovascularization). Bleeding, leaking, and scarring from these retinal blood vessels eventually causes irreversible damage to the photoreceptors.
• the dry form results from atrophy of the retinal pigment epithelial layer, which causes vision loss through loss of photoreceptors (rods and cones) in the central part of the eye.
• the invention provides a method of treating choroidal neovascularization (CNV).
• CNV choroidal neovascularization
• Choroidal neovascularization is a process in which new blood vessels grow in the choroid, through the Bruch membrane and invade the subretinal space, and is a symptom of, among other causes, age- related macular degeneration, myopia and ocular trauma.
• the invention provides a method of treating diabetic macular edema (DME).
• the invention provides a method of treating macular edema that is secondary to branch retinal vein occlusion (BRVO) or central retinal vein occlusion (CRVO).
• BRVO branch retinal vein occlusion
• CRVO central retinal vein occlusion
• the diseases to be treated include, without limitation, retinal neovascularization, infectious and noninfectious, corneal neovascularization infectious and non-infectious, iris neovascularization, uveitis, neovascular glaucoma, and retinitis of prematurity (ROP).
• the method of treatment can be prophylactic, such as to stave off corneal neovascularization after corneal transplant, or to modulate the wound healing process in trabeculectomy surgery.
• These diseases and disorders may be characterized as having an angiogenic component. According to the invention, such disorders are treated by administering an inventive compound and an angiogenesis inhibitor.
• the disease or disorder is AMD, and a subject in need of treatment for AMD is administered an amount of an inventive compound to treat AMD.
• the subject is administered an inventive compound and an angiogenesis inhibitor in amounts effective to treat AMD.
• a ROCK2- selective inhibitor may be preferred.
• the angiogenesis inhibitor is a VEGFR2 antagonist.
• the VEGFR2 antagonist binds to VEGF.
• the VEGFR2 antagonist binds to VEGFR2.
• VEGFR2 -binding inhibitors include agents that bind to the extracellular domain of VEGFR2, including but not limited to antibodies and VEGFR2-binding fragments thereof and agents that interact with the intracellular domain of VEGFR2 and block activation of VEGFR2- dependent signal transduction.
• VEGFR2 antagonists further include agents that interact with other cellular components to block VEGFR2- dependent signal transduction.
• other ocular diseases and disorders having an angiogenic component such as are indicated above, are similarly treated.
• an inventive compound and an angiogenesis inhibitor are administered to a subj ect in amounts effective amount to treat or preventing a pathologic condition characterized by excessive angiogenesis.
• Such conditions include atherosclerosis, rheumatoid arthritis (RA), hemangiomas, angiofibromas, and psoriasis.
• angiogenic disease are retinopathy of prematurity (retrolental fibroplastic), corneal graft rejection, corneal neovascularization related to complications of refractive surgery, corneal neovascularization related to contact lens complications, corneal neovascularization related to pterygium and recurrent pterygium, corneal ulcer disease, and non-specific ocular surface disease, insulin- dependent diabetes mellitus, multiple sclerosis, myasthenia gravis, Crohn' s disease, autoimmune nephritis, primary biliary cirrhosis, acute pancreatitis, allograph rejection, allergic inflammation, contact dermatitis and delayed hypersensitivity reactions, inflammatory bowel disease, septic shock, osteoporosis
• the invention further encompasses pharmaceutical compositions that include the disclosed compound as an ingredient.
• Such pharmaceutical compositions may take any physical form necessary depending on a number of factors including the desired method of administration and the physicochemical and stereochemical form taken by the disclosed compound or pharmaceutically acceptable salts of the compound.
• Such physical forms include a solid, liquid, gas, sol, gel, aerosol, or any other physical form now known or yet to be disclosed.
• the concept of a pharmaceutical composition including the disclosed compound also encompasses the disclosed compound or a pharmaceutically acceptable salt thereof without any other additive.
• the physical form of the invention may affect the route of administration and one skilled in the art would know to choose a route of administration that takes into consideration both the physical form of the compound and the disorder to be treated.
• compositions that include the disclosed compound may be prepared using methodology well known in the pharmaceutical art.
• a pharmaceutical composition that includes the disclosed compound may include a second effective compound of a distinct chemical formula from the disclosed compound. This second effective compound may have the same or a similar molecular target as the target or it may act upstream or downstream of the molecular target of the disclosed compound with regard to one or more biochemical pathways.
• compositions including the disclosed compound include materials capable of modifying the physical form of a dosage unit.
• the composition includes a material that forms a coating that holds in the compound.
• Materials that may be used in such a coating include, for example, sugar, shellac, gelatin, or any other inert coating agent.
• Pharmaceutical compositions including the disclosed compound may be prepared as a gas or aerosol. Aerosols encompass a variety of systems including colloids and pressurized packages. Delivery of a composition in this form may include propulsion of a pharmaceutical composition including the disclosed compound through use of liquefied gas or other compressed gas or by a suitable pump system. Aerosols may be delivered in single phase, bi-phasic, or tri-phasic systems.
• the pharmaceutical composition including the disclosed compound is in the form of a solvate.
• solvates are produced by the dissolution of the disclosed compound in a pharmaceutically acceptable solvent.
• Pharmaceutically acceptable solvents include any mixtures of more than one solvent.
• solvents may include pyridine, chloroform, propan-l-ol, ethyl oleate, ethyl lactate, ethylene oxide, water, ethanol, and any other solvent that delivers a sufficient quantity of the disclosed compound to treat the affliction without serious complications arising from the use of the solvent in patients.
• compositions that include the disclosed compound may also include a pharmaceutically acceptable carrier.
• Carriers include any substance that may be administered with the disclosed compound with the intended purpose of facilitating, assisting, or helping the administration or other delivery of the compound.
• Carriers include any liquid, solid, semisolid, gel, aerosol or anything else that may be combined with the disclosed compound to aid in its administration. Examples include diluents, adjuvants, excipients, water, oils (including petroleum, animal, vegetable or synthetic oils,)
• Such carriers include particulates such as a tablet or powder, liquids such as an oral syrup or injectable liquid, and inhalable aerosols.
• Such carriers may further include binders such as ethyl cellulose, carboxymethylcellulose, microcrystalline cellulose, or gelatin; excipients such as starch, lactose or dextrins; disintegrating agents such as alginic acid, sodium alginate, Primogel, and corn starch; lubricants such as magnesium stearate or Sterotex; glidants such as colloidal silicon dioxide; sweetening agents such as sucrose or saccharin, a flavoring agent such as peppermint, methyl salicylate or orange flavoring, or coloring agents.
• binders such as ethyl cellulose, carboxymethylcellulose, microcrystalline cellulose, or gelatin
• excipients such as starch, lactose or dextrins
• disintegrating agents such as alginic acid, sodium alginate, Primogel, and corn starch
• lubricants such as magnesium stearate or Sterotex
• glidants such as colloidal silicon dioxide
• sweetening agents such as
• carriers include polyethylene glycol, cyclodextrin, oils, or any other similar liquid carrier that may be formulated into a capsule.
• Still further examples of carriers include sterile diluents such as water for injection, saline solution, physiological saline, Ringer's solution, isotonic sodium chloride, fixed oils such as synthetic mono or diglycerides, polyethylene glycols, glycerin, cyclodextrin, propylene glycol or other solvents; antibacterial agents such as benzyl alcohol or methyl paraben; antioxidants such as ascorbic acid or sodium bisulfite; chelating agents such as ethyl enediaminetetraacetic acid; buffers such as acetates, citrates or phosphates and agents for the adjustment of tonicity such as sodium chloride or dextrose, thickening agents, lubricating agents, and coloring agents.
• sterile diluents such as water for injection, saline solution, physiological
• the pharmaceutical composition including the disclosed compound may take any of a number of formulations depending on the physicochemical form of the composition and the type of administration.
• Such forms include solutions, suspensions, emulsions, tablets, pills, pellets, capsules, capsules including liquids, powders, sustained-release formulations, directed release formulations, lyophylates, suppositories, emulsions, aerosols, sprays, granules, powders, syrups, elixirs, or any other formulation now known or yet to be disclosed. Additional examples of suitable pharmaceutical carriers are described in "Remington's Pharmaceutical Sciences" by E. W. Martin, hereby incorporated by reference in its entirety. Methods of administration include, but are not limited to, oral administration and parenteral administration.
• Parenteral administration includes, but is not limited to intradermal, intramuscular, intraperitoneal, intravenous, subcutaneous, intranasal, epidural, sublingual, intranasal, intracerebral, intraventricular, intrathecal, intravaginal, transdermal, rectal, by inhalation, or topically to the ears, nose, eyes, or skin.
• Other methods of administration include but are not limited to infusion techniques including infusion or bolus injection, by absorption through epithelial or mucocutaneous linings such as oral mucosa, rectal and intestinal mucosa.
• Compositions for parenteral administration may be enclosed in ampoule, a disposable syringe or a multiple-dose vial made of glass, plastic or other material.
• Administration may be systemic or local. Local administration is administration of the disclosed compound to the area in need of treatment. Examples include local infusion during surgery; topical application, by local injection; by a catheter; by a suppository; or by an implant. Administration may be by direct injection at the site (or former site) of a cancer, tumor, or precancerous tissue or into the central nervous system by any suitable route, including intraventricular and intrathecal injection. Intraventricular injection may be facilitated by an intraventricular catheter, for example, attached to a reservoir, such as an Ommaya reservoir. Pulmonary administration may be achieved by any of a number of methods known in the art.
• Examples include use of an inhaler or nebulizer, formulation with an aerosolizing agent, or via perfusion in a fluorocarbon or synthetic pulmonary surfactant.
• the disclosed compound may be delivered in the context of a vesicle such as a liposome or any other natural or synthetic vesicle.
• a pharmaceutical composition formulated so as to be administered by injection may be prepared by dissolving the disclosed compound with water so as to form a solution.
• a surfactant may be added to facilitate the formation of a homogeneous solution or suspension.
• Surfactants include any complex capable of non-covalent interaction with the disclosed compound so as to facilitate dissolution or homogeneous suspension of the compound.
• compositions including the disclosed compound may be prepared in a form that facilitates topical or transdermal administration.
• Such preparations may be in the form of a solution, emulsion, ointment, gel base, transdermal patch or iontophoresis device.
• bases used in such compositions include opetrolatum, lanolin, polyethylene glycols, beeswax, mineral oil, diluents such as water and alcohol, and emulsifiers and stabilizers, thickening agents, or any other suitable base now known or yet to be disclosed.
• a compound of Formula I can be prepared according to Scheme 1.
• HATU hexafluorophosphate
• Another compound of Formula I can be prepared according to Scheme 2.
• the coupling of amine 4 and phenyl chloroformate yields structure 7, which is treated with amine 2 to afford urea 9.
• a compound of Formula V can be prepared according to Scheme 3. Aniline diamine 10 and isothiocyanate 11 are heated in TFIF and the cyclization of the resulting thiourea with iodomethane yields aminoimidazole 12.
• Non-limiting examples illustrative of the invention include those shown in Table 1.
• 6-chloro-N-(3-methoxybenzyl)thieno[2,3-b]pyridine-2-carboxamide 6-chloro-N-(3-methoxybenzyl)thieno[2,3-b]pyridine-2-carboxamide was prepared from 6- chlorothieno[2,3-b]pyridine-2-carboxylic acid by following the synthesis method of Step 2 in Example 3.
• the following assay protocol is for measuring the phosphorylation of a peptide substrate (FAM- KKLRRTLSVA-OH wherein FAM is carboxyfluorescein).
• the peptide is >98% purity by Capillary Electrophoresis.
• the peptide is phosphorylated by the protein kinase ROCK1 or ROCK2.
• the ROCK1 or ROCK2 enzyme, substrate, and cofactors are combined in a well of a microtiter plate and incubated for 3 hours at 25°C. At the end of the incubation, the reaction is quenched by the addition of an EDTA-containing buffer.
• the substrate and product are separated and quantified electrophoretically using the mi croflui die-based LABCHTP 3000 Drug Discovery System from Caliper Life Sciences (Hopkinton, Massachusetts).
• the components of the assay mixture are:
• Substrate and product peptides present in each sample are separated electrophoretically using the LABCHTP 3000 capillary electrophoresis instrument. As substrate and product peptides are separated two peaks of fluorescence are observed. Change in the relative fluorescence intensity of the substrate and product peaks is the parameter measured reflecting enzyme activity.
• Capillary electrophoregramms (RDA acquisition files) are analyzed using HTS Well Analyzer software (Caliper Life Sciences, Hopkinton, Massachusetts). The kinase activity in each sample is determined as the product to sum ratio (PSR): P/(S+P), where P is the peak height of the product peptide and S is the peak height of the substrate peptide.
• Pinh (PSR0% - PSRinh)/(PSR0% - PSR100%)* 100 where PSRinh is the product sum ratio in the presence of inhibitor, PSR0% is the average product sum ratio in the absence of inhibitor, and PSR100% is the average product sum ratio in 100%-inhibition control samples.
• the IC 50 values of inhibitors are determined by fitting the inhibition curves (Pinh versus inhibitor concentration) by 4 parameter sigmoidal dose-response model using XLfit 4 software (IBDS).
• This assay can be used to test the activity of each of the exemplary compounds identified in Table 1. It is expected that each of these compounds will demonstrate inhibition of the protein kinase ROCK1 and/or ROCK2.
• IC 50 (or percent activity) data for the compounds of the present invention in K562 or MV411 cell lines are summarized in Table 2.
• the CELLTITER-GIO® Luminescent Cell Viability Assay is a homogeneous method to determine the number of viable cells in culture based on quantitation of the ATP present, which signals the presence of metabolically active cells. Following treatment, CELLTITER-GIO® is added to treatment wells and incubated at 37° C. luminescence values were measured at using a Molecular Devices Spectramax microplate reader.
• f tes t is the luminescence of the tested sample
• f ve hicie is the luminescence of the vehicle in which the drug is dissolved.
• the experiments also evaluated the selectivity of the compounds for inhibiting growth of cancer cells carrying a mutation in the Flt3 gene.
• the MV411 cell line expresses the mutant allele of Flt3 with internal tandem duplications (ITD) of the gene.
• ITD internal tandem duplications
• K562 is a chronic myeloid leukemia cell line that does not express FLT3 protein.
• Grafone et al. "Monitoring of FLT3 Phosphorylation Status and Its Response to Drugs By Flow Cytometry in AML Blast Cells," Hematol Oncol. 26(3), 2008, 159-166.
• Rho-associated kinase may be manipulated for the treatment of ⁇ -FL T3 + AML as reported in Onish et al, "Internal Tandem Duplication Mutations in FLT3 Gene Augment Chemotaxis to Cxcll2 Protein by Blocking the Down-regulation of the Rho-associated Kinase via the Cxcll2/Cxcr4 Signaling Axis," J. Biol. Chem. 289 (45), 2014, 31053-31065.

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