Classifications

• • 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
  • C07D401/12—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 linked by a chain containing hetero atoms as chain links
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
  • C07D239/70—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings condensed with carbocyclic rings or ring systems
  • C07D239/72—Quinazolines; Hydrogenated quinazolines
  • C07D239/86—Quinazolines; Hydrogenated quinazolines with hetero atoms directly attached in position 4
  • C07D239/94—Nitrogen atoms
• • 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
  • C07D403/12—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 linked by a chain containing hetero atoms as chain links

Definitions

• the present invention relates to nitrogen-containing heterocyclic compounds and pharmaceutically acceptable salts thereof which have inhibitory activity on the phosphorylation of kinases, which inhibits the activity of such kinases.
• the invention is also related to a method of inhibiting kinases and treating disease states in a mammal by inhibiting the phosphorylation of kinases.
• PDGF platelet-derived growth factor
• Inhibitors of phosphorylation of PDGF receptor so far known include bismono- and bicyclic aryl compounds and heteroaryl compounds (WO 92/20642), quinoxaline derivatives [Cancer Research, 54, 6106 (1994)], pyrimidine derivatives (Japanese Published Unexamined Patent Application No. 87834/94) and dimethoxyquinoline derivatives [Abstracts of the 16th Annual Meeting of the Pharmaceutical Society of Japan (Kanazawa) (1996), 2, p. 275, 29(C2) 15-2].
• An object of the present invention is to provide nitrogen-containing heterocyclic compounds and pharmaceutically acceptable salts thereof which have inhibitory activity on the phosphorylation of kinases, which inhibits the activity of the kinases.
• Particularly important kinase inhibition according to the invention is of receptor tyrosine kinases including platelet-derived growth factor (PDGF) receptor, Flt3, CSF-IR, epidermal growth factor receptor (EGRF), fibroblast growth factor (FGF), vascular endothelial growth factor receptor (VEGFR) and others.
• Another class of kinase inhibition according to the invention is inhibitory activity nonreceptor tyrosine kinases including src and abl, and the like.
• a third class of kinase inhibition according to the invention is inhibitory activity toward serine/threonine kinases, including such kinases as MAPK, MEK and cyclin dependent kinases (CDKs) that mediate cell prolifetation, AKT and CDK such that mediate cell survival and NTK that regulate inflammatory responses.
• kinases as MAPK, MEK and cyclin dependent kinases (CDKs) that mediate cell prolifetation, AKT and CDK such that mediate cell survival and NTK that regulate inflammatory responses.
• Inhibition of such kinases can be used to treat diseases involving cell survival, proliferation and migration, including cardiovascular disease, such as arteriosclerosis and vascular reobstruction, cancer, glomerulosclerosis fibrotic diseases and inflammation, as well as the general treatment of cell-proliferative diseases.
• the present invention provides compounds and pharmaceutically acceptable salts thereof which inhibit or prevent inhibition of phosphorylation of at least one PDGF receptor by at least one tyrosine kinase.
• PDGF receptor kinase inhibition can hinder abnormal cell growth and cell wandering, and thus such compounds are useful for the prevention or treatment of cell-proliferative diseases such as arteriosclerosis, vascular reobstruction, cancer and glomerulosclerosis.
• the present invention relates to nitrogen-containing heterocyclic compounds represented by formula I as follows:
• X is O or S
• R 1 and R 2 are each independently a member selected from the group consisting of -OH,
• the invention provides such compounds wherein n and m are each independently 2 or 3.
• the pharmaceutically acceptable salts of the compounds according to formula (I) include pharmaceutically acceptable acid addition salts, metal salts, ammonium salts, organic amine addition salts, amino acid addition salts, etc.
• pharmaceutically acceptable acid addition salts of the compounds of formula (I) are inorganic acid addition salts such as hydrochloride, sulfate and phosphate, and organic acid addition salts such as acetate, maleate, fumarate, tartrate, citrate and methanesulfonate.
• Examples of the pharmaceutically acceptable metal salts are alkali metal salts such as sodium salt and potassium salt, alkaline earth metal salts such as magnesium salt and calcium salt, aluminum salt and zinc salt.
• Examples of the pharmaceutically acceptable ammonium salts are ammonium salt and tetramethyl ammonium salt.
• Examples of the pharmaceutically acceptable organic amine addition salts include heterocyclic amine salts such as morpholine and piperidine salts.
• Examples of the pharmaceutically acceptable amino acid addition salts are salts with lysine, glycine and phenylalanine.
• R is defined as described above for formula I,
• the invention provides compounds according to formula 1(b) as follows:
• R, R 2 and m are each independently defined as described above for formula I,
• R, R 1 and n are each independently defined as described above for formula I,
• an especially preferred embodiment of the present invention is a compound selected from the group consisting of:
• the compounds may be prepared using methods and procedures as generally described in WO 98/14431 published September 12, 1998, which is incorporated herein by reference. Starting materials may be made or obtained as described therein as well. Leaving groups such as halogen, lower alkoxy, lower alkylthio, lower alkylenesulfonyloxy, arylsulfonyloxy, etc, may be utilized when necessary except for the reaction point, followed by deprotection. Suitable amino protective groups are, for example, those described in T. W. Greene, Protective Groups in Organic Synthesis, John Wiley & Sons Inc. (1981), etc., such as ethoxycarbonyl, t-butoxycarbonyl, acetyl and benzyl.
• the protective groups can be introduced and eliminated according to conventional methods used in organic synthetic chemistry [e.g., T. W. Greene, Protective Groups in Organic Synthesis, John Wiley & Sons Inc. (1981)]. In such processes, if the defined groups change under the conditions of the working method or are not appropriate for carrying out the method, the desired compound can be obtained by using the methods for introducing and eliminating protective groups which are conventionally used in organic synthetic chemistry [e.g., T. W. Greene, Protective Groups in Organic Synthesis, John Wiley & Sons Inc. (1981)], etc. Conversion of functional groups contained in the substituents can be carried out by known methods [e.g., R. C. Larock, Comprehensive Organic Transformations (1989)] in addition to the above-described processes, and some of the active compounds of formula I may be utilized as intermediates for further synthesizing novel derivatives according to formula I.
• the intermediates and the desired compounds in the processes described above can be isolated and purified by purification methods conventionally used in organic synthetic chemistry, for example, neutralization, filtration, extraction, washing, drying, concentration, recrystallization, and various kinds of chromatography.
• the intermediates may be subjected to the subsequent reaction without purification.
• a salt of a compound of formula I is desired and the compound is produced in the form of the desired salt, it can be subjected to purification as such.
• the compound of formula I is dissolved or suspended in a suitable organic solvent, followed by addition of an acid or a base to form a salt.
• the synthesis of 4-Cl-quinazoline is effected by treating 4-quinazolinone with halogenatmg reagents such as thionyl chloride, oxalyl chloride or phosphorous oxychloride in presence of solvent such as toluene, or carbon tetrachloride.
• halogenatmg reagents such as thionyl chloride, oxalyl chloride or phosphorous oxychloride in presence of solvent such as toluene, or carbon tetrachloride.
• the key intermediate is obtained by treating 4-C1- quinazoline with piperazine in an appropriate solvent, such as isopropanol, acetonitrile, or THF at room or reflux temperature for l-6h in presence of base triethylamine or pyridine.
• Scheme 2 (below) provides the synthesis of various substituted urea intermediates from the intermediate obtained above in Scheme 1, or by other procedures.
• the piperazine intermediate may be treated with phosgene to give a carbamoyl chloride intermediate followed by reaction with various substituted anilines.
• the piperazine intermediate can also be treated with p-nitrophenyl chloroformate to afford a nitrophenyl carbamate intermediate that can be treated with various anilines to afford the desired ureas.
• the urea compound has a terminal NH 2 group (or one or more of the hydrogen atoms on this amino group is replaced by a displaceable substituent), then this compound may be utilized an intermediate compound with which to produce a urea compound terminated with a -NH-phenyl-R 1 groups.
• a replaceable para position leaving group phenyl substituent may be displaced after coupling to provide the particular R 1 substituent as described for formula I, above.
• the compounds of formula I and pharmaceutically acceptable salts thereof may exist in the form of adducts with water (hydrates) or various solvents, which are also within the scope of the present invention.
• Example 1 The following non-limiting examples are provided to better illustrate the present invention.
• Example 1 The following non-limiting examples are provided to better illustrate the present invention.
• Step A To the acetone solution (lOmL) of ethyl 3,4-dihydroxybenzoate (0.910g, 5mmol), K 2 CO 3 (1.52g, llmmol), nBu 4 NI (20mg) was added 2-bromoethylmethyl ether (1.17mL, 12.5mmol). The mixture was stirred overnight at 100°C under argon. After cooling, to this added ether and the precipitate was filtered, the filtrate was evaporated to afford the desired product as white solid (0.850g, 60%).
• Step B To the acetic acid (4mL) solution of ethyl-3,4-bis(2-methoxyethoxy)benzoate (0.710g, 2.4mmol) at -10°C was slowly added nitric acid ( 0.350mL). After stirring at this temperature for lh, added KNO 3 (0.240g, 2.4mmol) and H 2 SO 4 (0.180mL) followed by stirring at room temperature overnight. The reaction was poured in ice and extracted with EtOAc, washed with brine, dried, filtered and evaporated to give brown oil (0.800g, quantitative). MS(ES) 344 (M+H) +
• Step C To the EtOH (lOmL) solution of nitro material from Step B (0.686g, 2mmol) added PtO 2 (40mg, 0.16mmol) and then the mixture was shaken on Parr hydrogenation apparatus at 45psi of H 2 for overnight. Filtration of the catalyst through celite and evaporation of the solvent under vacuum gave the desired amino ester (0.600g).
• Step D The amino product (lg, 3.21mmol) from Step C was dissolved in formamide (4mL) to this added ammonium formate (0.298g, 4.71mmol) and the reaction mixture was heated at 150°C for 4h. After cooling to room temperature, the solution was diluted with water and extracted with EtOAc. The EtOAc extracts were washed with brine, dried, filtered and evaporated to give beige-colored solid (0.600g, 62%).
• Step E A mixture of 6,7-bis(2-methoxyethoxy)-4-quinazolinone (0.969g, 3.3mmol) and POCl 3 (4.5mL) was heated to reflux under argon for 6h. After cooling to 0°C, added dropwise cone. NH 4 OH, a solid precipitated which was collected by filtration. The solid collected was washed with water and dried under high vacuum to afford desired 4- chloroquinazoline.
• Step A To the anhydrous DMSO solution (7mL) of phenol (0.44g, 4.7mmol) added NaH (0.24g, 6.05mmol) and stirred for 45min at room temperature. To this added l-fluoro-4- nitrobenzene(0.66g, 4.65mmol) and this was heated at 90°C for overnight. After cooling diluted with EtOAc and washed with brine, dried, filtered, evaporated to afford crude residue. This was purified by silica gel cliromatography (10%EtOAc/hexane) to give desired product as bright yellow oil (0.91 g, 91%). MS(ES) 216 (M+H)
• Step B The nitro compound from Step A (0.885g, 4.12mmol) was dissolved in
• Step A To the DMF solution (12mL) of Ethyl-3-hydroxy-4-fluorobenzoate (0.80g, 4.35mmol) added K 2 CO 3 (2.10g, 15.22mmol) followed by 2-bromoethyl methylether
• Step B To a DMF solution (lOmL) of 2-piperidineethanol (2.86mL, 21.6mmol) added NaH(0.83g, 20.9mmol) at 0°C and the mixture was stirred for lh. To this added DMF solution (3mL) of ester (0.725g, 3.15mmol, from Step A, Example 4) and heated the reaction at 90°C overnight. The solvent was evaporated and the residue purified by RP-HPLC to afford the desired ethyl 3-(2-methoxyethoxy)-4-(2-piperidylethoxy)benzoate as a off-white solid. MS(ES) 352(M+H)
• Step C To the acetic acid (3mL) solution of ethyl 3-(2-methoxyethoxy)-4- (2- piperidylethoxy)benzoate (0.197g, 0.56mrno ⁇ ) at -10°C was slowly added nitric acid ( 0.200mL). After stirring at this temperature for lh, added KNO 3 (0.056g, 0.56mmol) and H 2 SO 4 (0.200mL) slowly warmed up to room temperature and stirred for lh. The reaction was poured in ice, basified with NH4OH, and extracted with EtOAc. The EtOAc layer was separated, dried, filtered and evaporated to give white solid (0.200g, 95%).
• Step F To 4-quinazolinone (0.195g, 0.423mmol, From Step E) added SOCl 2 (3mL), DMF (0.200mL) and the mixture was heated at 90°C for lh. After cooling evaporated the solvent and azetroped several times with toluene to afford the desired 4-Cl-quinazoline as tan crystalline solid (0.197g).
• ES(MS) 366 (M+H, with 1C1).
• Step G To the isopropanol solution (8mL) of the material from Step F (0.190g, 0.423mmol) added Boc-piperazine (0.197g, 1.06mmol) followed by Et 3 N (0.288mL, 2.1 lmmol). The reaction mixture was heated to reflux overnight. The solvent was evaporated and the residue purified by RP-HPLC to afford desired product tert-butyl-4-[6- (2-methoxyethoxy)-7-(2-piperidylethoxy)quinazolin-4-yl]piperazinylcarboxylate (0.173g, 62%). MS(ES) 516 (M+H).
• the pharmacological activities of the compounds of the present invention are obtained by following the test example procedures as follows, for example.
• the HR5 cell line is a cell line of CHO cells engineered to overexpress human ?-PDGFR, which cell line is available from the ATCC.
• the expression level of /?-PDGFR in HR5 cells is around 5 xlO 4 receptor per cell.
• HR5 cells were grown to confluency in 96-well microtiter plates under standard tissue culture conditions, followed by serum-starvation for 16 hours. Quiescent cells were incubated at 37°C without or with increasing concentrations of the test compound (0.01-30 ⁇ M) for 30 minutes followed by the addition of 8 nM PDGF BB for 10 minutes.
• Cells were lysed in 100 mM Tris, ⁇ H7.5, 750 mM NaCl, 0.5% Triton X-100, 10 mM sodium pyrophosphate, 50 mM NaF, 10 ug/ml aprotinin, 10 ug/ml leupeptin, lmM phenylmethylsulfonyl fluoride, 1 mM sodium vanadate, and the lysate was cleared by centrifugation at 15,000 x g for 5 minutes.
• Clarified lysates were transferred into a second microtiter plate in which the wells were previously coated with 500 ng/well of 1B5B11 anti- ⁇ -PDGFR mAb, and then incubated for two hours at room temperature. After washing three times with binding buffer (0.3% gelatin, 25mM Hepes pH 7.5, lOOmM NaCl, 0.01% Tween-20), 250 ng/ml of rabbit polyclonal anti-phosphotyrosine antibody (Transduction Laboratory) was added and plates were mcubated at 37°C for 60 minutes.
• binding buffer 0.3% gelatin, 25mM Hepes pH 7.5, lOOmM NaCl, 0.01% Tween-20
• the MG63 cell line is a human osteosarcoma tumor cell line available from the
• This assay is for measuring endogenous 7-PDGFR phosphorylation in MG63 cells.
• the assay conditions are the same as those described for HR5 cell, except that PDGF-BB stimulation is provided in the presence or absence of 45% human plasma.
• the MG63 assay results are reported as an IC 50 (expressed as the concentration of a compound according to the invention that inhibits the PDGF receptor phosphorylation by 50%) as compared to control cells that are not exposed to a compound according to the invention. Examples of such IC 50 test results in the MG63 assay for compounds according to the invention are set forth below in Table 1.
• Vascular smooth muscle cells are isolated from a pig aorta by explanation and used for the test. The cells are put into wells of a 96-well plate (8000 cells/well) and cultured in
• DMEM containing 0.1 % FBS for 3 days are synchronized at the cell growth stationary phase.
• the test result is expressed as the concentration of a test compound which inhibits the cell growth by 50% (IC 50 ).
• a test compound is suspended in a 0.5% solution of Tween 80 in an aqueous solution of sodium chloride to a concentration of 20 mg/ml in the case of intraperitoneal administration and in a 0.5% solution of methyl cellulose 400 to a concentration of 6 mg/ml in the case of oral administration.
• the suspension is administered once a day in the case of intraperitoneal administration and once or twice a day in the case of oral administration for a period of 15 days starting on the day before the balloon injury.
• the animal On the 14th day after the balloon injury, the animal is killed and its left carotid is extirpated.
• the tissues are fixed with formalin, wrapped in paraffin and sliced, followed by Elastica Wangeeson staining.
• the area of the cross section of the vascular tissues is measured with an image analyzer
• Dead cells of Mycobacterium bacterium are disrupted in agate mortar and suspended in liquid paraffin to the final concentration of 6.6 mg/ml, followed by sterilization with high pressure steam. Then, 100 ml of the suspension is subcutaneously injected into the right hind foot pad of each animal of groups of female 8-weeks-old Lewis rats (Charles River Japan) (6 animals/group) to induce adjuvant arthritis.
• a test compound i suspended in a 0.5 % solution of methyl cellulose to the final concentration of 3 mg/ml, and from just before the induction of arthritis, the suspension is orally administered in an amount of 100 ml/100 g of the body weight once a day, 5 days a week.
• a control group is administered a 0.5% solution of methyl cellulose.
• a normal group is given no adjuvant treatment or test compound administration.
• the administration of the test compound is continued till the 18th day after the adjuvant treatment.
• the number of leukocytes in peripheral blood are counted, and on the 18th day, all the blood is collected, followed by dissection.
• the change in body weight with the passage of time, the change of edema in hind foot with the passage of time, the weight of spleen and thymus, the number of leukocytes in peripheral blood, the hydroxyproline content of urine, the glucosaminoglycan content of urine, the SH concentration in serum, the concentration of nitrogen monoxide in serum and the concentration of mucoprotein in serum are measured and evaluated.
• the volume of each of both hind feet are measured using a rat's hind foot edema measurement device (TK-101, Unicom).
• the number of leukocytes in peripheral blood are counted using an automatic multichannel blood cell counter (Sysmex K-2000, Toa Iyo Denshi Co., Ltd.).
• the hydroxyproline content of urine is measured according to the method described in Ikeda, et al., Annual Report of Tokyo Metropolitan Research Laboratories P. H., , 36, 277 (1985), and the glucosaminoglycan content is measured according to the method described in Moriyama, et al., Hinyo Kiyo, 40, 565 (1994) and Klompmakers, et al., Analytical Biochemistry, 153, 80 (1986).
• the SH concentration in serum is measured according to the method described in Miesel, et al, inflammation, 17, 595 (1993), and the concentration of nitrogen monoxide is measured according to the method ofTracey, et al., Journal of Pharmacology & Experimental Therapeutics, 272, 1011 (1995).
• the concentration of mucoprotein is measured using Aspro GP Kit (Otsuka Pharmaceutical Co., Ltd.). The percentage inhibition for each indication is calculated according to the following equation.
• % Inhibition ⁇ (Control group - Compound-administered group)/(Control group - Normal group) ⁇ x 100.
• Anti-rat Thy-1.1 monoclonal antibody OX-7 (Sedaren) is administered to male Wister-Kyoto rats (Charles River Japan, 160 g, 6 animals/group) in an amount of 1.0 mg/kg by intravenous administration through the tail vein.
• a test compound is suspended in a 0.5% solution of methylcellulose and the resulting suspension is administered to each of the rats twice a day for a period of 7 days starting on the day before the administration of OX-7.
• On the 7th day after the OX-7 administration when mesangial cell growth and extracellular matrix hypertrophy become prominent, the left kidney of each rat is extirpated, fixed with 20% buffered formalin for 6 hours and wrapped in paraffin, followed by slicing.
• the obtained pieces are subjected to immune tissue staining using antibody PC 10 (DAKO) against an intranuclear antigen of proliferative cells.
• DAKO antibody PC 10
• Methyl Green staining solution using diaminobenzidine as a color developer
• the paraffin pieces are enclosed.
• Half of the glomeruli in a kidney piece are observed and the number of the cells in one glomerulus which are positive to the intranuclear antigen of proliferative cells are calculated.
• the test for the significance of difference is carried out by the Wilcoxon test.
• the compounds of formula (I) and pharmaceutically acceptable salts thereof can be administered as such, but it is usually preferred to administer them in the form of pharmaceutical compositions, which are used for animals and human beings. It is preferred to employ the administration route which is the most effective for the treatment. For example, administration is made orally or non-orally by intrarectal, intraoral, subcutaneous, intramuscular or intravenous administration.
• Examples of the forms for administration are capsules, tablets, granules, powders, syrups, emulsions, suppositories and injections.
• Liquid compositions such as emulsions and syrups which are appropriate for oral administration can be prepared using water, sugars such as sucrose, sorbitol and fructose, glycols such as polyethylene glycol and propylene glycol, oils such as sesame oil, olive oil and soybean oil, preservatives such as benzoates, flavors such as strawberry flavor and peppermint, etc.
• Capsules, tablets, powders and granules can be prepared using excipients such as lactose, glucose, sucrose and mannitol, disintegrating agents such as starch and sodium alginate, lubricants such as magnesium stearate and talc, binders such as polyvinyl alcohol, hydroxypropyl cellulose and gelatin, surfactants such as fatty acid esters, plasticizers such as glycerin, etc.
• excipients such as lactose, glucose, sucrose and mannitol
• disintegrating agents such as starch and sodium alginate
• lubricants such as magnesium stearate and talc
• binders such as polyvinyl alcohol, hydroxypropyl cellulose and gelatin
• surfactants such as fatty acid esters
• plasticizers such as glycerin, etc.
• compositions suitable for non-oral administration preferably comprise a sterilized aqueous preparation containing an active compound which is isotonic to the recipient's blood.
• injections are prepared using a carrier which comprises a salt solution, a glucose solution, or a mixture of a salt solution and a glucose solution.
• compositions for topical application are prepared by dissolving or suspending an active compound in one or more kinds of solvents such as mineral oil, petroleum and polyhydric alcohol, or other bases used for topical drugs.
• Compositions for intestinal administration are prepared using ordinary carriers such as cacao fat, hydrogenated fat and hydrogenated fat carboxylic acid, and are provided as suppositories.
• compositions for non-oral administration may additionally be formulated to contain one or more kinds of additives selected from glycols, oils, flavors, preservatives
• compositions for oral administration which are used for the preparation of compositions for oral administration.
• the effective dose and the administration schedule for each of the compounds of formula (I) or a pharmaceutically acceptable salt thereof will vary depending on the administration route, the patient's age and body weight, and the type or degree of the diseases to be treated. However, it is generally appropriate to administer a compound of formula (I) or a pharmaceutically acceptable salt thereof in a dose of 0.01-1000 mg/adult/day, preferably 5-500 mg/adult/day, in one to several parts.
• All the compounds of the present invention can be immediately applied to the treatment of kinase-dependent diseases of mammals as kinase inhibitors, specifically, those relating to tyrosine kinase.
• kinase inhibitors specifically, those relating to tyrosine kinase.
• the compounds which have IC50 within the range of 10 nM-10 ⁇ M Even more preferred are compounds which have IC50 within the range of 10 ⁇ M to -1 ⁇ M.
• Most preferred are compounds which have an IC50 value which is smaller than 1 ⁇ M.
• Tyrosine kinase-dependent diseases include hyperproliferative malfunction which is caused or maintained by abnormal tyrosine kinase activity. Examples thereof include psoriasis, pulmonary fibrosis, glomerulonephritis, cancer, atherosclerosis and anti-angiopoiesis (for example, tumor growth and diabetic retinopathy).
• the present invention provides nitrogen-containing heterocyclic compounds and pharmaceutically acceptable salts thereof which inhibit phosphorylation of PDGF receptor to hinder abnormal cell growth and cell wandering and thus are useful for the prevention or treatment of cell-proliferative diseases such as arteriosclerosis, vascular reobstruction, cancer and glomerulosclerosis.

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