BENZOTHIAZOLE DERIVATIVES AND USES THEREOF

Abstract

A compound represented by general formula (I) or stereoisomers thereof and pharmaceutically acceptable salts, solvates or prodrugs thereof, a preparation method therefor and a pharmaceutical composition containing the compound. An application of the compound of general formula (I) in preparation of drugs for treating and/or preventing she-mediated diseases, especially an application in preparation of drugs for treating inflammatory diseases, cardiovascular and cerebrovascular diseases, diabetes, diabetes complications, diabetes-related diseases, fibrotic diseases, neurological and mental diseases, pain, and ulcer diseases, etc.

##STR00001##

Claims

1. A compound of general formula I or its stereoisomers as well as pharmaceutically acceptable salts, solvates or prodrugs thereof, ##STR00058## wherein, X is CH or N; Y is CH or N; Z is CH, N or bond; Q is O, S, NH or NCH.sub.3; R.sub.1 is hydrogen, —(CH.sub.2).sub.mNR.sub.3R.sub.4, —C(O)NH(CH.sub.2).sub.nR.sub.5, —C(O)(CH.sub.2).sub.nR.sub.5 or —S(O).sub.2NH(CH.sub.2).sub.nR.sub.5; m is an integer from 2 to 4; R.sub.3 and R.sub.4 are same or different, and independently selected from hydrogen, (C.sub.1-C.sub.6)alkyl, (C.sub.3-C.sub.7)cycloalkyl, (C.sub.1-C.sub.6)alkylacyl, (C.sub.1-C.sub.6)alkoxyl, (C.sub.2-C.sub.6)alkenyl, and (C.sub.2-C.sub.6)alkynyl; or R.sub.3 and R.sub.4 together with the nitrogen atom to which they are attached form a 4 to 10 membered heterocyclic group or 5 to 10 membered heteroaryl group, wherein the heterocyclic group or heteroaryl group optionally contains 0 to 4 heteroatom(s) selected from N, O, and/or S in addition to the nitrogen atom to which R.sub.3 and R.sub.4 are attached, the heterocyclic group optionally comprises 0 to 2 carbon-carbon double bond(s) or carbon-carbon triple bond(s) in addition to the nitrogen atom to which R.sub.3 and R.sub.4 are attached, and the heterocyclic group or heteroaryl group is optionally substituted by 1 to 3 same or different R.sub.6; R.sub.2 is hydrogen, —C(O)NH(CH.sub.2).sub.nR.sub.5, —C(O)(CH.sub.2).sub.nR.sub.5, —S(O).sub.2NH(CH.sub.2).sub.nR.sub.5 or —(CH.sub.2).sub.mNR.sub.3R.sub.4; R.sub.1 and R.sub.2 are not hydrogen at the same time; n is an integer from 0 to 4; R.sub.5 is hydrogen, (C.sub.1-C.sub.6)alkyl, (C.sub.3-C.sub.10)cycloalkyl, (C.sub.6-C.sub.10)aryl or 5 to 10 membered heteroaryl group, wherein the heteroaryl group contains 1 to 3 heteroatom(s) selected from N, O or S, and the aryl or heteroaryl group is optionally substituted by 1 to 3 same or different R.sub.7; R.sub.8 is hydrogen, —C(O)(CH.sub.2).sub.qR.sub.9, —(CH.sub.2).sub.qC(O)OR.sub.9 or —C(O)NH(CH.sub.2).sub.qR.sub.9; R.sub.9 is (C.sub.1-C.sub.6)alkyl, (C.sub.3-C.sub.7)cycloalkyl, (C.sub.6-C.sub.10)aryl or 5 to 10 membered heteroaryl group, wherein the aryl or heteroaryl group is optionally substituted by 1 to 3 same or different Rio; q is an integer from 0 to 4; R.sub.6, R.sub.7, and Rio are independently 1 to 3 same or different substituent(s) selected from hydrogen, hydroxyl, halogen, nitro, amino, cyano, azido, mercapto, (C.sub.1-C.sub.6)alkyl, (C.sub.1-C.sub.6)alkoxyl, (C.sub.1-C.sub.6)alkyl or (C.sub.1-C.sub.6)alkoxyl optionally substituted by hydroxyl, amino or halogen, (C.sub.1-C.sub.6)alkylthiol, allyl, amino substituted by mono or di(C.sub.1-C.sub.6 alkyl), (C.sub.1-C.sub.6)alkylamido, free, salified, esterified, and amidated carboxyl, (C.sub.1-C.sub.6)alkylsulfinyl, (C.sub.1-C.sub.6)alkylsulfonyl, (C.sub.1-C.sub.6)alkylacyl, carbamoyl or carbamoyl substituted by mono or di(C.sub.1-C.sub.6 alkyl).

2. The compound of general formula I or its stereoisomers as well as pharmaceutically acceptable salts, solvates or prodrugs thereof according to claim 1, wherein, Z is CH; R.sub.1 is hydrogen or —(CH.sub.2).sub.mNR.sub.3R.sub.4; R.sub.2 is hydrogen, —C(O)NH(CH.sub.2).sub.nR.sub.5 or —C(O)(CH.sub.2).sub.nR.sub.5; R.sub.1 and R.sub.2 are not hydrogen at the same time; R.sub.3 and R.sub.4 are same or different, and independently selected from hydrogen, (C.sub.1-C.sub.6)alkyl, (C.sub.3-C.sub.7)cycloalkyl, (C.sub.1-C.sub.6)alkylacyl, (C.sub.1-C.sub.6)alkoxyl, (C.sub.2-C.sub.6)alkenyl, and (C.sub.2-C.sub.6)alkynyl; or R.sub.3 and R.sub.4 together with the nitrogen atom to which they are attached form a 4 to 10 membered heterocyclic group, wherein the heterocyclic group optionally contains 1 to 4 heteroatom(s) selected from N, O, and/or S in addition to the nitrogen atom to which R.sub.3 and R.sub.4 are attached, and optionally substituted by 1 to 3 same or different R.sub.6.

3. The compound of general formula I or its stereoisomers as well as pharmaceutically acceptable salts, solvates or prodrugs thereof according to claim 1, R.sub.5 is (C.sub.3-C.sub.10)cycloalkyl, phenyl or a 5 to 10 membered heteroaryl group containing 1 to 3 heteroatom(s) selected from N, O or S; more preferably (C.sub.3-C.sub.7)cycloalkyl, phenyl, indolyl, quinolyl, pyridyl, pyrimidinyl, furyl, thienyl or pyrrolyl, wherein aryl or heteroaryl group is optionally substituted by 1 to 3 same or different R.sub.7.

4. The compound of general formula I or its stereoisomers as well as pharmaceutically acceptable salts, solvates or prodrugs thereof according to claim 1, wherein, R.sub.1 is hydrogen or —(CH.sub.2).sub.mNR.sub.3R.sub.4; R.sub.3 and R.sub.4 are same or different, and independently selected from hydrogen, (C.sub.1-C.sub.6)alkyl, and (C.sub.3-C.sub.7)cycloalkyl or together with the nitrogen atom to which they are attached form ##STR00059## R.sub.2 is hydrogen, —C(O)NH(CH.sub.2).sub.nR.sub.5 or —C(O)(CH.sub.2).sub.nR.sub.5.

5. The compound of general formula I or its stereoisomers as well as pharmaceutically acceptable salts, solvates or prodrugs thereof according to claim 1, R.sub.9 is phenyl optionally substituted by 1 to 3 same or different Rio.

6. The following compound of general formula I or its stereoisomers as well as pharmaceutically acceptable salts, solvates or prodrugs thereof according to claim 1: 1-(2-aminobenzo[d]thiazol-6-yl)-3-(4-chlorophenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-3-phenylurea; 1-(2-aminobenzo[d]thiazol-6-yl)-3-[(3s,5s,7s)-adamantan-1-yl]urea; 1-(2-aminobenzo[d]thiazol-6-yl)-3-(4-chlorobenzyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-3-cyclohexylurea; 1,1′-(benzo[d]thiazol-2,6-diyl)bis[3-(4-chlorophenyl)urea]; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-nitrophenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-acetylphenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-acetamidophenyl)urea; N-(2-aminobenzo[d]thiazol-6-yl)-2-(4-chlorophenyl)-N-[2-(4-morpholinyl)ethyl]acetamide; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethylphenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-2-yl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(naphthalen-1-yl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(3-bromo-4-fluorophenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-ethylphenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-isopropoxyphenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-isopropylphenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(N,N-diethylamino)ethyl]-3-(4-chlorophenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-methylpiperidin-1-yl)ethyl]-3-(4-chlorophenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-methylpiperazin-1-yl)ethyl]-3-(4-trifluoromethylphenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(pyrrolidin-1-yl)ethyl]-3-(4-chlorophenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(N,N-dimethylamino)ethyl]-3-(4-chlorophenyl)urea; 1-(2-aminobenzo[d]thiazol-6-yl)-1-[3-(4-morpholinyl)propyl]-3-(4-chlorophenyl)urea; 1-(2-phenylacetamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea; 1-[2-(2-ethoxyformamido)benzo[d]thiazol-6-yl]-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea; 1-{[2-(2-ethoxyformyl)ethylamino-1-yl]benzo[d]thiazol-6-yl}-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea; 1-(2-acetamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea; Tert-butyl (6-{2-(4-chlorophenyl)-N-[2-(4-morpholinyl)ethyl]acetamido}benzo[d]thiazol-2-yl)carbamate; 1-(2-phenylformamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea; 1-(2-phenylpropionamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea; 1-(2-phenylacetamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethylphenyl)urea; 1-(2-aminobenzo[d]oxazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-methylphenyl)urea; 1-(2-acetamidobenzo[d]oxazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-methylphenyl)urea; 1-(2-phenylacetamidobenzo[d]oxazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-methylphenyl)urea; 1-(2-aminothiazo[5,4-b]pyridin-5-yl)-3-(4-fluorophenyl)-1-[2-(4-morpholinyl)ethyl]urea; 1-[2-(ethylamino)thiazo[5,4-b]pyridin-5-yl]-1-[2-(4-morpholinyl)ethyl]-3-(4-fluorophenyl)urea; 1-{2-[3-(4-chlorophenyl)ureido]benzo[d]thiazol-6-yl}-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea; 1-(2-aminothiazo[4,5-c]pyridin-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea; 1-(2-cyclopropylformamidothiazo[4,5-c]pyridin-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea; 1-{[2-(2-ethoxyformyl)ethylamino-1-yl]thiazo[4,5-c]pyridin-6-yl}-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea; 1-(2-aminothiazo[5,4-d]pyrimidin-5-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-3-yl)urea; 1-(2-acetamidothiazo[5,4-d]pyrimidin-5-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-3-yl)urea; 1-(2-phenylpropionamidothiazo[5,4-d]pyrimidin-5-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-3-yl)urea; 1-[2-(3-benzylureido)thiazo[4,5-b]pyridin-6-yl]-1-[2-(4-morpholinyl)ethyl]-3-(4-bromo-3-fluorophenyl)urea.

7. The compound of general formula I or its stereoisomers as well as pharmaceutically acceptable salts, solvates or prodrugs thereof according to claim 1, wherein the pharmaceutically acceptable salt is a salt formed with an acid, and the acid is selected from: hydrochloric acid, hydrobromic acid, hydrofluoric acid, sulfuric acid, phosphoric acid, nitric acid, formic acid, acetic acid, propionic acid, oxalic acid, malonic acid, succinic acid, fumaric acid, maleic acid, lactic acid, malic acid, tartaric acid, citric acid, picric acid, methanesulfonic acid, ethanesulfonic acid, toluenesulfonic acid, benzenesulfonic acid, naphthalenesulfonic acid, trifluoroacetic acid or aspartic acid.

8. A pharmaceutical composition comprising the compound of general formula I or its stereoisomers as well as pharmaceutically acceptable salts, solvates or prodrugs thereof according to claim 1, and a pharmaceutically acceptable carrier.

9. A method for treating and/or preventing a sEH-mediated disease, comprising administering to a subject in need of such treatment the compound of general formula I or its stereoisomers as well as pharmaceutically acceptable salts, solvates or prodrugs thereof according to claim 1.

10. The method according to claim 9, characterized in that, the sEH-mediated disease includes inflammatory diseases, cardiovascular and cerebrovascular diseases, diabetes, diabetic complications, diabetes-related diseases, fibrotic diseases, neurological and mental diseases, pains, and ulcerative diseases.

11. The method according to claim 10, characterized in that, the inflammatory diseases include: inflammatory liver disease, inflammatory kidney disease, inflammatory lung disease, inflammatory brain disease, pancreatitis, arthritis, soft tissue inflammation, bone tissue inflammation, and vascular inflammation; the cardiovascular and cerebrovascular diseases include: hypertension, myocardial infarction, heart failure, coronary heart disease, cardiovascular arteriosclerosis, cerebral ischemic stroke, and cerebral hemorrhagic stroke; the diabetes includes: type I diabetes and type II diabetes; the diabetic complications include: diabetic retinopathy, diabetes-related uveitis, diabetic cataract, diabetic nephropathy, diabetic dermopathy, and diabetic peripheral neuropathy; the diabetes-related diseases include: hyperlipidemia, hyperuricemia and gout, obesity, and metabolic syndrome; the fibrotic disease include: pulmonary fibrosis, hepatic fibrosis, myocardial fibrosis, and renal fibrosis; the neurological and mental diseases include: Alzheimer's disease, epilepsy, Parkinson's disease, schizophrenia, dysphrenia, depression, and neurasthenia; the pain diseases include: neuropathic pain, inflammatory pain, neoplastic pain and mixed pain; and the ulcerative diseases include: gastric ulcer, duodenal ulcer, ulcerative colitis, corneal ulcer, and oral ulcer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0112] FIG. 1 The results for the effect of the compound of Example 16 on maintaining the level of EETs in vivo

[0113] #: Compared with the sham group, p<0.05; *: Compared with the UUO group, p<0.05.

[0114] FIG. 2 The results for the effect of the compound of Example 16 against renal fibrosis

[0115] #: Compared with the sham group, p<0.05; *: Compared with the UUO group, p<0.05.

[0116] FIG. 3 The results for the anti-inflammatory effects of the compounds of Example 12, 18, 27, and 40

[0117] *: Compared with the model group, p<0.05.

[0118] FIG. 4 The results for the hypoglycemic effect of the compound of Example 12

[0119] *: Compared with the model group, p<0.05.

[0120] FIG. 5 The results for the improvements on retinal capillary integrity and permeability of the compound of Example 40

[0121] *: Compared with the model group, p<0.05.

[0122] FIG. 6 The results for the analgesic effect of the compounds of Examples 12 and 40

[0123] *: Compared with the model group, p<0.05.

[0124] FIG. 7 The results for the antidepressant effect of the compounds of Examples 12 and 40

[0125] *: Compared with the blank solvent group, p<0.05.

DETAILED DESCRIPTION OF THE INVENTION

[0126] In the following Examples, the methods for preparing some of said compounds are described. It should be understood that the following methods and other methods known to one of ordinary skill in the art can be applied to the preparations of all compounds described herein. The Examples are intended to illustrate the scope of the invention, rather than limiting the scope. The proton nuclear magnetic resonance spectrum for the compound was determined by Bruker ARX-400 or Bruker ARX-600, and the mass spectrum was determined by Agilent 1100 LC/MSD; and the reagents used were analytical or chemically pure.

Example 1 Preparation of 1-(2-aminobenzo[d]thiazol-6-yl)-3-(4-chlorophenyl)urea 1.1 Synthesis of tert-butyl (6-nitrobenzo[d]thiazol-2-yl)carbamate (B)

[0127] To a solution of 2-amino-6-nitrobenzothiazole (A) (purchased from Shanghai Bide Pharmatech Ltd.) (10 g, 51.2 mmol) and 4-dimethylaminopyridine (purchased from Beijing Ouhe Technology Co., Ltd.) (3.2 g, 26.2 mmol) in DMF (100 mL), di-tert-butyl dicarbonate (purchased from Shanghai Bide Pharmatech Ltd.) (16.8 g, 77.0 mmol) was added, and the resulting solution was stirred at 90° C. for 18 h. The resulting mixture was poured into stirred ice water (500 mL), then the yellow solid was filtered and dried under reduced pressure. The crude product was purified by flash column chromatography, to obtain 15.3 g of Intermediate B. Yield: 85%. MS (ESI) m/z: 296.3 [M+H].sup.+.

1.2 Synthesis of tert-butyl (6-aminobenzo[d]thiazol-2-yl)carbamate (C)

[0128] Intermediate B (12.0 g, 40.5 mmol) was dissolved in 1,4-dioxane (120 mL), and FeCl.sub.3.Math.H.sub.2O (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (1.0 g, 6.2 mmol), activated carbon (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (0.15 g, 12.5 mmol), and 80% hydrazine hydrate (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (35 mL) were added to the solution, respectively. The mixture solution was heated to 90° C. for 12 h. The mixture solution was filtered through celite, the filter cake was washed with 1,4-dioxane (100 mL), and the filtrate was concentrated under vacuum, to obtain 9.3 g of Intermediate C. Yield: 73.3%. MS (ESI) m/z: 266.2 [M+H].sup.+.

1.3 Synthesis of tert-butyl phenyl benzo[d]thiazol-2,6-dicarbamate (D)

[0129] Intermediate C (10 g, 37.7 mmol) was dissolved in acetone (100 mL), and phenyl chloroformate (purchased from Shanghai Bide Pharmatech Ltd.) (9.0 g, 57.7 mmol) was dropwise added to the solution under stirring. After dropwise addition, the reaction solution was stirred at room temperature for 2 h. The reaction mixture solution was filtered by suction, to obtain 9.4 g of Intermediate D. Yield: 83.6%. MS (ESI) m/z: 386.1 [M+H].sup.+.

1.4 Synthesis of tert-butyl (6-(3-(4-chlorophenyl)ureido)benzo[d]thiazol-2-yl)carbamate (E)

[0130] Intermediate D (0.5 g, 1.3 mmol) was dissolved in 1,4-dioxane (5 mL), and p-chloroaniline (purchased from Beijing Ouhe Technology Co., Ltd.) (0.15 g, 1.5 mmol) and triethylamine (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (0.13 g, 1.3 mmol) were added to the solution. The mixture was heated to 60° C. and stirred for 3 h. The reaction solution was filtered by suction, and the filter cake was washed with diethyl ether, and dried, to obtain 0.3 g of Intermediate E. Yield: 86.1%.

1.5 Preparation of 1-(2-aminobenzo[d]thiazol-6-yl)-3-(4-chlorophenyl)urea (I)

[0131] Intermediate E (0.3 g) was dissolved in dichloromethane (3 mL), and trifluoroacetic acid (purchased from Reagent Station of Shenyang Pharmaceutical University) (3 mL) was added to the solution. After stirring overnight at room temperature, the mixture solution was concentrated under reduced pressure and water was added (5 mL), and filtered by suction after adjusting the pH to 8 with saturated sodium bicarbonate solution. The filter cake was further purified by silica-gel column chromatography, to obtain 0.15 g of Intermediate I. Yield: 77%.

Example 2 1-(2-aminobenzo[d]thiazol-6-yl)urea

[0132] Using sodium cyanate (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate E was synthesized in accordance with the synthesis process of step 1.4 in Example 1, then 1-(2-aminobenzo[d]thiazol-6-yl)urea was synthesized in accordance with the synthesis process of step 1.5 in Example 1. Yield: 65%.

Example 3 1-(2-aminobenzo[d]thiazol-6-yl)-3-phenylurea

[0133] Using aniline (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate E was synthesized in accordance with the synthesis process of step 1.4 in Example 1, then 1-(2-aminobenzo[d]thiazol-6-yl)-3-phenylurea was synthesized in accordance with the synthesis process of step 1.5 in Example 1. Yield: 70%.

Example 4 1-(2-aminobenzo[d]thiazol-6-yl)-3-[(3s,5s,7s)-adamantan-1-yl]urea

[0134] Using adamantanamine (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate E was synthesized in accordance with the synthesis process of step 1.4 in Example 1, then 1-(2-aminobenzo[d]thiazol-6-yl)-3-[(3s,5s,7s)-adamantan-1-yl]urea was synthesized in accordance with the synthesis process of step 1.5 in Example 1. Yield: 68%.

Example 5 1-(2-aminobenzo[d]thiazol-6-yl)-3-(4-chlorobenzyl)urea

[0135] Using p-chlorobenzylamine (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate E was synthesized in accordance with the synthesis process of step 1.4 in Example 1, then 1-(2-aminobenzo[d]thiazol-6-yl)-3-(4-chlorobenzyl)urea was synthesized in accordance with the synthesis process of step 1.5 in Example 1. Yield: 54%.

Example 6 1-(2-aminobenzo[d]thiazol-6-yl)-3-cyclohexylurea

[0136] Using cyclohexylamine (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate E was synthesized in accordance with the synthesis process of step 1.4 in Example 1, then 1-(2-aminobenzo[d]thiazol-6-yl)-3-cyclohexylurea was synthesized in accordance with the synthesis process of step 1.5 in Example 1. Yield: 89%.

Example 7 1,1′-(benzo[d]thiazol-2,6-diyl)bis[3-(4-chlorophenyl)urea]

[0137] 1-(2-Aminobenzo[d]thiazol-6-yl)-3-(4-chlorophenyl)urea (0.2 g, 0.4 mmol) was dissolved in 1,4-dioxane (3 mL), and DIPEA (purchased from Shanghai Bide Pharmatech Ltd.) (0.1 g, 0.7 mmol) was added. At room temperature, phenyl (4-chlorophenyl)carbamate (0.1 g, 0.4 mmol) was added to the solution, and stirred overnight at room temperature. After the reaction was completed, water (10 mL) was added, and a solid was precipitated, which was filtered by suction. The filter cake was washed, dried, and purified by column chromatography, to obtain 0.08 g of white solid. Yield: 76%.

Example 8 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-nitrophenyl)urea

8.1 Synthesis of tert-butyl (6-{[2-(4-morpholinyl)ethyl]amino}benzo[d]thiazol-2-yl)carbamate (F)

[0138] Intermediate C (2.0 g, 7.5 mmol) was dissolved in 1,4-dioxane (20 mL), and potassium carbonate (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (3.1 g, 22.4 mmol) and 4-(2-chloroethyl)morpholine (purchased from Shanghai Bide Pharmatech Ltd.) (1.2 g, 11.2 mmol) were added to the solution. The reaction solution was heated to reflux and reacted under stirring for 8 h. After the reaction was cooled to room temperature, water (80 mL) was added thereto, and extracted with ethyl acetate (2×80 mL). The organic layers were combined, washed with brine, dried, concentrated and dried under reduced pressure, to obtain 1.5 g of Intermediate F. Yield: 60%.

8.2 Synthesis of phenyl N-(4-chlorophenyl)carbamate (G)

[0139] At room temperature, 4-chloroaniline (purchased from Beijing Ouhe Technology Co., Ltd.) (1.4 g, 11.2 mmol) and sodium carbonate (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (0.7 g, 6.7 mmol) were added to a mixture solution of ethyl acetate-tetrahydrofuran-water (3:1:1=10 mL), and a solution of phenyl chloroformate (purchased from Shanghai Bide Pharmatech Ltd.) (1.9 g, 12.3 mmol) in ethyl acetate (3 mL) was dropwise added in ice-bath. After dropwise addition, the system was reacted at room temperature for 2 h. After the reaction was completed, the reaction solution was concentrated under reduced pressure, and water (10 mL) was added to the residue. After adjusting the pH to 5 with 1 M hydrochloric acid solution, the solution was filtered by suction. The filter cake was washed with water (10 mL), and dried, to obtain 2.5 g of white solid. Yield: 91%.

8.3 Synthesis of tert-butyl (6-{3-(4-chlorophenyl)-1-[2-(4-morpholinyl)ethyl]ureido}benzo[d]thiazol-2-yl)carbamate (H)

[0140] At room temperature, Intermediate F (0.5 g, 0.6 mmol) and Intermediate G (0.4 g, 0.7 mmol) were added to 1,4-dioxane (4 mL), and DIPEA (purchased from Shanghai Bide Pharmatech Ltd.) (0.3 g, 2.3 mmol) was dropwise added to the reaction solution. After dropwise addition, the system was heated to 60° C. and reacted for 3 h. After the reaction was completed, the solution was cooled to room temperature, and the solvent was concentrated under reduced pressure. To the residue water (10 mL) was added. After adjusting the pH to 10 with 2.5% NaOH solution, the solution was filtered by suction, and dried, to obtain a crude product. The crude product was purified by column chromatography (dichloromethane:methanol=20:1), to obtain 0.35 g of white solid. Yield: 62%.

8.4 Preparation of 1-(2-aminobenzo[d]thiazol-6-yl)-3-(4-chlorophenyl)-1-[2-(4-morpholinyl)ethyl]urea(I)

[0141] Intermediate H (0.3 g, 0.6 mmol) was dissolved in dichloromethane (3 mL), and trifluoroacetic acid (purchased from Reagent Station of Shenyang Pharmaceutical University) (3 mL) was added to the solution. After stirring overnight at room temperature, the mixture solution was concentrated under reduced pressure and water was added (3 mL), and filtered by suction after adjusting the pH to 8 with saturated sodium bicarbonate solution. The filter cake was further purified by silica-gel column chromatography, to obtain 0.15 g of yellow solid. Yield: 80%.

Example 9 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-acetylphenyl)urea

[0142] Using 4-acetylaniline (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-acetylphenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 54%.

Example 10 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-acetamidophenyl)urea

[0143] Using 4-acetamidoaniline (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-acetamidophenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 69%.

Example 11 N-(4-{3-(2-aminobenzo[d]thiazol-6-yl)-3-[2-(4-morpholinyl)ethyl]ureido}phenyl)acetamide

[0144] Using 4-chlorophenylacetic acid (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then N-(4-{3-(2-aminobenzo[d]thiazol-6-yl)-3-[2-(4-morpholinyl)ethyl]ureido}phenyl)acetamide was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 72%.

Example 12 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea

[0145] Using 4-chloroaniline (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 57%.

Example 13 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethylphenyl)urea

[0146] Using 4-trifluoromethylaniline (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethylphenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 43%.

Example 14 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-2-yl)urea

[0147] Using 2-aminopyridine (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-2-yl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 38%.

Example 15 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(naphthalen-1-yl)urea

[0148] Using 2-naphthylamine (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(naphthalen-1-yl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 59%.

Example 16 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(3-bromo-4-fluorophenyl)urea

[0149] Using 3-bromo-4-fluoroaniline (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(3-bromo-4-fluorophenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 75%.

Example 17 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea

[0150] Using 4-trifluoromethoxyaniline (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 52%.

Example 18 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-ethylphenyl)urea

[0151] Using p-ethylaniline (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-ethylphenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 85%.

Example 19 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-isopropoxyphenyl)urea

[0152] Using 4-isopropoxyaniline (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-isopropoxyphenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 91%.

Example 20 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-isopropylphenyl)urea

[0153] Using 4-isopropylaniline (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, the key Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, then Intermediate H was synthesized in accordance with the synthesis process of step 8.3 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-isopropylphenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 78%.

Example 21 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(N,N-diethylamino)ethyl]-3-(4-chlorophenyl)urea

[0154] Using 2-chloro-N,N-dimethylethyl-1-amine (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate F was synthesized in accordance with the synthesis process of step 8.1 in Example 8, then using p-chloroaniline as raw material, Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(N,N-diethylamino)ethyl]-3-(4-chlorophenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 54%.

Example 22 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-methylpiperidin-1-yl)ethyl]-3-(4-chlorophenyl)urea

[0155] Using 1-(2-chloroethyl)-4-methylpiperidine (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate F was synthesized in accordance with the synthesis process of step 8.1 in Example 8, then using p-chloroaniline as raw material, Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-methylpiperidin-1-yl)ethyl]-3-(4-chlorophenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 65%.

Example 23 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-methylpiperazin-1-yl)ethyl]-3-(4-trifluoromethylphenyl)urea

[0156] Using 1-(2-chloroethyl)-4-methylpiperazine (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate F was synthesized in accordance with the synthesis process of step 8.1 in Example 8, then using p-chloroaniline as raw material, Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(4-methylpiperazin-1-yl)ethyl]-3-(4-trifluoromethylphenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 43%.

Example 24 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(pyrrolidin-1-yl)ethyl]-3-(4-chlorophenyl)urea

[0157] Using 1-(2-chloroethyl)pyrrolidine (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate F was synthesized in accordance with the synthesis process of step 8.1 in Example 8, then using p-chloroaniline as raw material, Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(pyrrolidin-1-yl)ethyl]-3-(4-chlorophenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 51%.

Example 25 1-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(N,N-dimethylamino)ethyl]-3-(4-chlorophenyl)urea

[0158] Using 2-chloro-N,N-dimethylethyl-1-amine (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate F was synthesized in accordance with the synthesis process of step 8.1 in Example 8, then using p-chloroaniline as raw material, Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, and then 11-(2-aminobenzo[d]thiazol-6-yl)-1-[2-(N,N-dimethylamino)ethyl]-3-(4-chlorophenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 68%.

Example 26 1-(2-aminobenzo[d]thiazol-6-yl)-1-[3-(4-morpholinyl)propyl]-3-(4-chlorophenyl)urea

[0159] Using 4-(3-chloropropyl)morpholine (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate F was synthesized in accordance with the synthesis process of step 8.1 in Example 8, then using p-chloroaniline as raw material, Intermediate G was synthesized in accordance with the synthesis process of step 8.2 in Example 8, and then 1-(2-aminobenzo[d]thiazol-6-yl)-1-[3-(4-morpholinyl)propyl]-3-(4-chlorophenyl)urea was synthesized in accordance with the synthesis process of step 8.4 in Example 8. Yield: 76%.

Example 27 1-(2-phenylacetamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea

[0160] 1-(2-Aminobenzo[d]thiazol-6-yl)-3-(4-chlorophenyl)-1-[2-(4-morpholinyl)ethyl]urea (0.2 g, 0.4 mmol) was dissolved in ethyl acetate (3 mL), and potassium carbonate (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (0.1 g, 0.7 mmol) was added. At room temperature, phenylacetic acid (0.1 g, 0.4 mmol) was dropwise added to the solution, and stirred overnight at room temperature. After the reaction was completed, water (5 mL) was added, and extracted with ethyl acetate (2×10 mL). The organic layer was concentrated under reduced pressure, and purified by column chromatography, to obtain 0.08 g of white solid. Yield: 76%.

Example 28 1-[2-(2-ethoxyformamido)benzo[d]thiazol-6-yl]-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea

[0161] Using ethyl formate (purchased from Beijing Ouhe Technology Co., Ltd.) as raw material, 1-[2-(2-ethoxyformamido)benzo[d]thiazol-6-yl]-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea was prepared in accordance with the synthesis process in Example 27. Yield: 45%.

Example 29 1-{[2-(2-ethoxyformyl)ethylamino-1-yl]benzo[d]thiazol-6-yl}-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea

[0162] Using ethyl bromoacetate (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, 1-[2-(2-ethoxyformyl)ethylamino-1-yl]benzo[d]thiazol-6-yl]-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea was prepared in accordance with the synthesis process in Example 27. Yield: 32%.

Example 30 1-(2-acetamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea

[0163] Using acetyl chloride (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, 1-(2-acetamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea was prepared in accordance with the synthesis process in Example 27. Yield: 82%.

Example 31 tert-butyl (6-{2-(4-chlorophenyl)-N-[2-(4-morpholinyl)ethyl]acetamido}benzo[d]thiazol-2-yl)carbamate

[0164] Using tert-butoxyformyl chloride (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, tert-butyl (6-{2-(4-chlorophenyl)-N-[2-(4-morpholinyl)ethyl]acetamido}benzo[d]thiazol-2-yl)carbamate was prepared in accordance with the synthesis process in Example 27. Yield: 60%.

Example 32 1-(2-phenylformamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea

[0165] Using benzoyl chloride (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, 1-(2-phenylformamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea was prepared in accordance with the synthesis process in Example 23. Yield: 75%.

Example 33 1-(2-phenylpropionamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea

[0166] Using phenylpropionyl chloride (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, 1-(2-phneylpropionamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea was prepared in accordance with the synthesis process in Example 27. Yield: 68%.

Example 34 1-(2-phenylacetamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethylphenyl)urea

[0167] Using phenylacetyl chloride (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, 1-(2-phenylacetamidobenzo[d]thiazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethylphenyl)urea was prepared in accordance with the synthesis process in Example 27. Yield: 73%.

Example 35 1-(2-aminobenzo[d]oxazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-methylphenyl)urea 35.1 Synthesis of 6-nitrobenzo[d]oxazol-2-amine (K)

[0168] 2-Amino-5-nitrophenol (J) (purchased from Shanghai Bide Pharmatech Ltd.) (10 g, 64.9 mmol) was dissolved in 1,4-dioxane (100 mL), and cyanoguanidine (purchased from Beijing Ouhe Technology Co., Ltd.) (17 g, 202.3 mmol) and BF.sub.3.Math.Et.sub.2O (purchased from Shanghai Bide Pharmatech Ltd.) (28 g, 202.3 mmol) were successively added thereto. The tube was sealed quickly, and reacted at 80° C. for 6 h. After the reaction solution was cooled to room temperature, 2 N sodium bicarbonate solution was added to the solution, and extracted with ethyl acetate (3×100 mL). The organic layers were combined, washed with brine (100 mL), dried over sodium sulfate, concentrated and dried under reduced pressure, to obtain 8.4 g of Intermediate K as brown solid. Yield: 70%.

35.2 Synthesis of benzo[d]oxazol-2,6-diamine (L)

[0169] Intermediate K (8.0 g, 53.7 mmol) was dissolved in methanol (80 mL), and Pd/C (purchased from Shanghai Bide Pharmatech Ltd.) (0.8 g, 5.4 mmol) was added to the solution. The reaction was maintained by feeding hydrogen at room temperature for 12 h. The mixture solution was filtered through celite, the filter cake was washed with methanol (40 mL), and the filtrate was concentrated under vacuum, to obtain 5.4 g of Intermediate L. Yield: 60%. MS (ESI) m/z: 150.2 [M+H].sup.+.

35.3 Synthesis of N.SUP.6.-[2-(4-morpholinyl)ethyl]benzo[d]oxazol-2,6-diamine (M)

[0170] Intermediate L (2.0 g, 13.4 mmol) was dissolved in 1,4-dioxane (20 mL), and potassium carbonate (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (3.1 g, 22.4 mmol) and 4-(2-chloroethyl)morpholine (purchased from Shanghai Bide Pharmatech Ltd.) (1.2 g, 11.2 mmol) were added to the solution. The reaction solution was heated to reflux and reacted under stirring for 8 h. After the reaction was cooled to room temperature, water (80 mL) was added thereto, and extracted with ethyl acetate (2×80 mL). The organic layers were combined, washed with brine (60 mL), dried over sodium sulfate, concentrated and dried under reduced pressure, to obtain 1.5 g of Intermediate M as brown solid. Yield: 72%.

35.4 Preparation of 1-(2-aminobenzo[d]oxazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-methylphenyl)urea (I)

[0171] At room temperature, Intermediate M (0.50 g, 0.6 mmol) and phenyl p-toluene methylcarbamate (G) (0.4 g, 0.7 mmol) were added to 1,4-dioxane (4 mL), and DIPEA (purchased from Shanghai Bide Pharmatech Ltd.) (0.3 g, 2.3 mmol) was dropwise added to the reaction solution. After dropwise addition, the system was heated to 60° C. and reacted for 3 h. After the reaction was completed, the solution was cooled to room temperature, and the solvent was concentrated under reduced pressure. To the residue water (10 mL) was added. After adjusting the pH to 10 with 2.5% NaOH solution, the solution was filtered by suction, and dried, to obtain a crude product. The crude product was purified by column chromatography (dichloromethane:methanol=20:1), to obtain 0.35 g of white solid. Yield: 62%.

Example 36 1-(2-acetamidobenzo[d]oxazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-methylphenyl)urea

[0172] 1-(2-Aminobenzo[d]oxazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-methylphenyl)urea (0.2 g, 0.4 mmol) was dissolved in ethyl acetate (3 mL), and potassium carbonate (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (0.1 g, 0.7 mmol) was added. At room temperature, acetyl chloride (0.1 g, 0.4 mmol) was dropwise added to the solution, and stirred overnight at room temperature. After the reaction was completed, water (5 mL) was added, and extracted with ethyl acetate (2×10 mL). The organic layer was concentrated under reduced pressure, and purified by column chromatography, to obtain 0.08 g of white solid. Yield: 76%.

Example 37 1-(2-phenylacetamidobenzo[d]oxazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-methylphenyl)urea

[0173] Using p-chlorophenylacetyl chloride (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, 1-(2-phenylacetamidobenzo[d]oxazol-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-methylphenyl)urea was prepared in accordance with the synthesis process in Example 36. Yield: 60%.

Example 38 1-(2-aminothiazo[5,4-b]pyridin-5-yl)-3-(4-fluorophenyl)-1-[2-(4-morpholinyl)ethyl]urea

38.1 Synthesis of 5-chlorothiazo[5,4-b]pyridin-2-amine (O)

[0174] 2-Chloro-5-aminopyridine (N) (10 g, 78.1 mmol) and potassium thiocyanate (purchased from Shanghai Bide Pharmatech Ltd.) (15 g, 312.4 mmol) were dissolved in glacial acetic acid (100 mL), and bromine (purchased from Reagent Station of Shenyang Pharmaceutical University) (12 g, 156.2 mmol) was dropwise added thereto in ice bath. After dropwise addition, the reaction solution was heated to room temperature and reacted for 12 h. After adjusting the pH to 10 by adding ammonia water into the solution, a yellow solid was precipitated and filtered by suction, to obtain 12.2 g of Intermediate 0 as brown solid. Yield: 83%.

38.2 Synthesis of NS-[2-(4-morpholinyl)ethyl]thiazo[5,4-b]pyridin-2,5-diamine (P)

[0175] Intermediate O (2.0 g, 13.4 mmol) was dissolved in 1,4-dioxane (20 mL), and sodium hydroxide (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (2.5 g, 22.4 mmol) and 2-morpholino-1-amine (purchased from Shanghai Bide Pharmatech Ltd.) (1.2 g, 11.2 mmol) were added to the solution. The reaction solution was heated to reflux and reacted under stirring for 8 h. After the reaction was cooled to room temperature, water (30 mL) was added thereto, and extracted with ethyl acetate (2×30 mL). The organic layers were combined, washed with brine (60 mL), dried over sodium sulfate, concentrated and dried under reduced pressure, to obtain 1.3 g of Intermediate P as brown solid. Yield: 54%.

38.3 Preparation of 1-(2-aminothiazo[5,4-b]pyridin-5-yl)-3-(4-fluorophenyl)-1-[2-(4-morpholinyl)ethyl]urea (I)

[0176] At room temperature, Intermediate P (0.5 g, 0.6 mmol) and phenyl p-fluorobenzylcarbamate (G) (0.4 g, 0.7 mmol) were added to 1,4-dioxane (4 mL), and DIPEA (purchased from Shanghai Bide Pharmatech Ltd.) (0.30 g, 2.3 mmol) was dropwise added to the reaction solution. After dropwise addition, the system was heated to 60° C. and reacted for 3 h. After the reaction was completed, the solution was cooled to room temperature, and the solvent was concentrated under reduced pressure. To the residue water (10 mL) was added. After adjusting the pH to 10 with 2.5% NaOH solution, the solution was filtered by suction, and dried, to obtain a crude product. The crude product was purified by column chromatography (dichloromethane:methanol=20:1), to obtain 0.3 g of white solid. Yield: 51%.

Example 39 1-[2-(ethylamino)thiazo[5,4-b]pyridin-5-yl]-1-[2-(4-morpholinyl)ethyl]-3-(4-fluorophenyl)urea

[0177] 1-(2-Aminothiazo[5,4-b]pyridin-5-yl)-3-(4-fluorophenyl)-1-[2-(4-morpholinyl)ethyl]urea (0.2 g, 0.4 mmol) was dissolved in ethyl acetate (3 mL), and potassium carbonate (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (0.1 g, 0.7 mmol) was added to the solution, and stirred overnight at room temperature. After the reaction was completed, water (10 mL) was added, and extracted with ethyl acetate (2×30 mL). The organic layer was concentrated under reduced pressure, and purified by column chromatography, to obtain 0.08 g of white solid. Yield: 65%.

Example 40 1-{2-[3-(4-chlorophenyl)ureido]benzo[d]thiazol-6-yl}-1-[2-(4-morpholinyl)ethyl]-3-(4-chlorophenyl)urea

[0178] At room temperature, 1-(2-aminobenzo[d]thiazol-6-yl)-3-(4-chlorophenyl)-1-[2-(4-morpholinyl)ethyl]urea (0.5 g, 0.6 mmol) and phenyl benzylaminocarbamate (purchased from Shanghai Bide Pharmatech Ltd.) (0.4 g, 0.7 mmol) were added to 1,4-dioxane (4 mL), and triethylamine 0.3 g (2.3 mmol) was dropwise added to the reaction solution. After dropwise addition, the system was heated to 60° C. and reacted for 3 h. After the reaction was completed, the solution was cooled to room temperature, and the solvent was concentrated under reduced pressure. To the residue water (10 mL) was added. After adjusting the pH to 10 with 2.5% NaOH solution, the solution was filtered by suction, and dried, to obtain a crude product. The crude product was purified by column chromatography (dichloromethane:methanol=20:1), to obtain 0.25 g of white solid. Yield: 40%.

Example 41 1-(2-aminothiazo[4,5-c]pyridin-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea

41.1 Synthesis of N-[(4,6-dichloropyridin-3-yl)thiocarbamoyl]benzamide (R)

[0179] 4,6-Dichloropyridin-3-amine (Q) (5 g, 30.7 mmol) and phenyl isothiocyanate (purchased from Shanghai Bide Pharmatech Ltd.) (4.5 mL, 33.7 mmol) were dissolved in acetone (75 mL), heated to 60° C., and reacted for 4 h. The reaction solution was concentrated under reduced pressure, to obtain 8 g of brown solid. Yield: 80%.

41.2 Synthesis of N-(6-chlorothiazo[4,5-c]pyridin-2-yl)benzamide (S)

[0180] Intermediate R (9 g, 27.7 mmol) was added to NMP (45 mL), and at 0° C., sodium methoxide (purchased from Shanghai Bide Pharmatech Ltd.) (3.0 g, 55.8 mmol) was added to the solution. After addition, the reaction solution was heated to 120° C. and reacted for 4 h. Water (100 mL) was added to the reaction solution, and a brown solid was precipitated, which was filtered by suction to obtain 7 g of brown solid. Yield: 87%.

41.3 Synthesis of 6-chlorothiazo[4,5-c]pyridin-2-amine (T)

[0181] Intermediate S (5 g, 17.3 mmol) was dissolved in 70% sulfuric acid solution (purchased from Reagent Station of Shenyang Pharmaceutical University) (15 mL), and heated to 110° C. and reacted for 4 h. The reaction solution was concentrated under reduced pressure, adjusted to pH=8 with sodium bicarbonate solution (20 mL), and filtered by suction to obtain 1.8 g of off-white solid. Yield: 56%.

41.4 Synthesis of N.SUP.6.-[2-(4-morpholinyl)ethyl]thiazo[4,5-c]pyridin-2,6-diamine (U)

[0182] Intermediate T (0.8 g, 25.1 mmol) and cesium carbonate (purchased from Shanghai Bide Pharmatech Ltd.) (2.2 g, 75.3 mmol) were dissolved in 1,4-dioxane (10 mL), and palladium acetate (purchased from Shanghai Bide Pharmatech Ltd.) (0.1 g, 2.51 mmol) and xantphos (purchased from Shanghai Bide Pharmatech Ltd.) (0.35 g, 50.2 mmol) were added to the solution. With feeding nitrogen gas, the reaction solution was heated to 100° C. and reacted for 12 h. After removing the insoluble matters by suction filtration, the filtrate was purified by column chromatography, to obtain 0.5 g of white solid. Yield: 66%.

41.5 Preparation of 1-(2-aminothiazo[4,5-c]pyridin-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea (I)

[0183] At room temperature, Intermediate U (0.50 g, 0.6 mmol) and phenyl p-trifluoromethoxybenzylcarbamate (G) (0.4 g, 0.7 mmol) were added to 1,4-dioxane (4 mL), and DIPEA (purchased from Shanghai Bide Pharmatech Ltd.) (0.3 g, 2.3 mmol) was dropwise added to the reaction solution. The system was heated to 60° C. and reacted for 3 h. After the reaction was completed, the solution was cooled to room temperature, and the solvent was concentrated under reduced pressure. To the residue water (10 mL) was added. After adjusting the pH to 10 with 2.5% NaOH solution, the solution was filtered by suction, and dried, to obtain a crude product. The crude product was purified by column chromatography (dichloromethane:methanol=20:1), to obtain 0.35 g of white solid. Yield: 60%.

Example 42 1-(2-cyclopropylformamidothiazo[4,5-c]pyridin-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea

[0184] 1-(2-Aminothiazo[4,5-c]pyridin-6-yl)-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea (0.2 g, 0.4 mmol) was dissolved in ethyl acetate (3 mL), and potassium carbonate (purchased from Shenyang Aiketongsheng Chemical Reagent Co., Ltd.) (0.1 g, 0.7 mmol) was added. At room temperature, cyclopropionyl chloride (0.15 g, 0.4 mmol) was dropwise added to the solution, and stirred overnight at room temperature. After the reaction was completed, water (10 mL) was added, and extracted with ethyl acetate (2×30 mL). The organic layer was concentrated under reduced pressure, and purified by column chromatography, to obtain 0.06 g of white solid. Yield: 62%.

Example 43 1-{[2-(2-ethoxyformyl)ethylamino-1-yl]thiazo[4,5-c]pyridin-6-yl}-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea

[0185] Using ethyl chloroacetate (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, 1-{[2-(2-ethoxyformyl)ethylamino-1-yl]thiazo[4,5-c]pyridin-6-yl}-1-[2-(4-morpholinyl)ethyl]-3-(4-trifluoromethoxyphenyl)urea was prepared in accordance with the synthesis process in Example 42. Yield: 42%.

Example 44 1-(2-aminothiazo[5,4-d]pyrimidin-5-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-3-yl)urea

[0186] Using 2,4-dichloropyrimidin-5-amine (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate U was synthesized in accordance with the synthesis processes of steps 41.1 to 41.4 in Example 41, and then 1-(2-aminothiazo[5,4-d]pyrimidin-5-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-3-yl)urea was synthesized in accordance with the synthesis process of step 41.5 in Example 41. Yield: 59%.

Example 45 1-(2-acetamidothiazo[5,4-d]pyrimidin-5-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-3-yl)urea

[0187] Using acetyl chloride (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, 1-(2-acetamidothiazo[5,4-d]pyrimidin-5-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-3-yl)urea was prepared in accordance with the synthesis process in Example 42. Yield: 42%.

Example 46 1-(2-phenylpropionamidothiazo[5,4-d]pyrimidin-5-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-3-yl)urea

[0188] Using phenylpropionyl chloride (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, 1-(2-phenylpropionamidothiazo[5,4-d]pyrimidin-5-yl)-1-[2-(4-morpholinyl)ethyl]-3-(pyridin-3-yl)urea was prepared in accordance with the synthesis process in Example 42. Yield: 56%.

Example 47 1-[2-(3-benzylureido)thiazo[4,5-b]pyridin-6-yl]-1-[2-(4-morpholinyl)ethyl]-3-(4-bromo-3-fluorophenyl)urea

[0189] Using 3,5-dichloropyridin-2-amine (purchased from Shanghai Bide Pharmatech Ltd.) as raw material, the key Intermediate U was synthesized in accordance with the synthesis processes of steps 41.1 to 41.4 in Example 41, and then 1-(2-aminothiazo[4,5-b]pyridin-6-yl)-3-(4-bromo-3-fluorophenyl)-1-[2-(4-morpholinyl)ethyl]urea was synthesized in accordance with the synthesis process of step 41.5 in Example 41. Then 1-(2-aminothiazo[4,5-b]pyridin-6-yl)-3-(4-bromo-3-fluorophenyl)-1-[2-(4-morpholinyl)ethyl]urea and phenyl benzylcarbamate (0.4 g, 0.7 mmol) were added to 1,4-dioxane (4 mL), and triethylamine (0.3 g, 2.3 mmol) was dropwise added to the reaction solution. The system was heated to 60° C. and reacted for 3 h. After the reaction was completed, the solution was cooled to room temperature, and the solvent was concentrated under reduced pressure. To the residue water (10 mL) was added. After adjusting the pH to 10 with 2.5% NaOH solution, the solution was filtered by suction, and dried, to obtain a crude product. The crude product was purified by column chromatography (dichloromethane:methanol=20:1), to obtain 0.25 g of white solid. Yield: 40%.

[0190] The structures as well as .sup.1H-NMR and MS data for the compounds of Examples are shown in Table 1.

TABLE-US-00001 TABLE 1 Example Structural Formula .sup.1H-NMR, MS m/z data 1 [00011] MS (ESI) m/z: 319.6 [M + H].sup.+ 2 [00012] .sup.1H NMR (400 MHz, DMSO-d.sub.6) δ 8.41 (s, 1H), 7.83 (d, J = 1.9 Hz, 1H), 7.24 (s, 2H), 7.19 (d, J = 8.6 Hz, 1H), 7.06 (dd, J = 8.6, 2.0 Hz, 1H), 5.78 (s, 2H). MS (ESI) m/z: 209.5 [M + H].sup.+ 3 [00013] .sup.1H NMR (400 MHz, DMSO-d.sub.6) δ 9.04 (s, 1H), 8.99 (s, 1H), 7.88 (d, J = 1.6 Hz, 1H), 7.48 (d, J = 7.9 Hz, 2H), 7.29 (d, J = 1.9 Hz, 2H), 7.26 (s, 1H), 7.24 (d, J = 3.6 Hz, 1H), 7.19 (dd, J = 8.6, 1.7 Hz, 1H), 6.94 (t, J = 7.3 Hz, 1H). MS (ESI) m/z: 285.3 [M + H].sup.+ 4 [00014] .sup.1H NMR (400 MHz, DMSO-d.sub.6) δ 8.45 (s, 1H), 7.82 (d, J = 2.1 Hz, 1H), 7.23 (s, 2H), 7.18 (d, J = 8.6 Hz, 1H), 7.06 (dd, J = 8.6, 2.2 Hz, 1H), 2.09 (s, 1H), 1.97 (s, 2H), 1.62 (d, J = 14.8 Hz, 2H), 1.57 (s, 3H), 1.53 (s, 2H), 1.50 (s, 1H), 1.48 (d, J = 2.3 Hz, 4H). MS (ESI) m/z: 343.4 [M + H].sup.+ 5 [00015] .sup.1H NMR (400 MHz, DMSO-d.sub.6) δ 8.69 (s, 1H), 7.83 (s, 1H), 7.38 (d, J = 8.4 Hz, 2H), 7.32 (d, J = 8.4 Hz, 2H), 7.24 (s, 2H), 7.19 (d, J = 8.6 Hz, 1H), 7.10 (d, J = 8.6 Hz, 1H), 6.83 (s, 1H), 4.27 (d, J = 5.8 Hz, 2H). MS (ESI) m/z: 333.5 [M + H].sup.+ 6 [00016] MS (ESI) m/z: 291.5 [M + H].sup.+ 7 [00017] MS (ESI) m/z: 472.1 [M + H].sup.+ 8 [00018] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 9.66 (s, 2H), 8.19 (d, J = 9.3 Hz, 2H), 7.91 (d, J = 2.1 Hz, 1H), 7.72 (d, J = 9.2 Hz, 2H), 7.31 (d, J = 8.6 Hz, 1H), 7.24 (dd, J = 8.6, 2.1 Hz, 1H), 3.61-3.54 (m, 4H), 3.47 (t, J = 6.6 Hz, 2H), 2.53 (t, J = 6.6 Hz, 2H), 2.42 (s, 4H). MS (ESI) m/z: 443.3 [M + H].sup.+ 9 [00019] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 10.25 (s, 1H), 9.90 (s, 1H), 7.90 (s, 2H), 7.89 (s, 2H), 7.62 (s, 1H), 7.60 (s, 1H), 7.29 (d, J = 8.6 Hz, 1H), 7.22 (dd, J = 8.6, 2.0 Hz, 1H), 3.58 (t, J = 4.5 Hz, 4H), 3.47 (dd, J = 12.2, 6.4 Hz, 2H), 2.53 (d, J = 6.6 Hz, 2H), 2.51 (s, 3H), 2.42 (s, 4H). MS (ESI) m/z: 440.2 [M + H].sup.+ 10 [00020] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 9.77 (s, 1H), 9.30 (d, J = 5.4 Hz, 2H), 7.83 (d, J = 2.1 Hz, 1H), 7.72 (t, J = 5.4 Hz, 1H), 7.39 (d, J = 8.9 Hz, 2H), 7.32 (d, J = 8.9 Hz, 2H), 7.20 (d, J = 8.6 Hz, 1H), 7.13 (dd, J = 8.6, 2.1 Hz, 1H), 3.51 (t, J = 4.5 Hz, 4H), 3.39 (dd, J = 12.2, 6.4 Hz, 2H), 2.47-2.44 (m, 2H), 2.35 (s, 4H), 1.94 (s, 3H). MS (ESI) m/z: 455.3 [M + H].sup.+ 11 [00021] . MS (ESI) m/z: 503.1 [M + H].sup.+ 12 [00022] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 9.62 (s, 1H), 9.53 (s, 1H), 7.99 (s, 1H), 7.50 (d, J = 8.4 Hz, 2H), 7.44 (d, J = 8.4 Hz, 2H), 7.39 (d, J = 8.5 Hz, 1H), 7.30 (d, J = 8.3 Hz, 1H), 3.86 (s, 4H), 3.80 (s, 2H), 3.42 (d, J = 5.2 Hz, 2H), 3.38 (s, 4H). MS (ESI) m/z: 432.3 [M + H].sup.+ 13 [00023] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 7.63 (s, 1H), 7.37 (d, J = 8.6 Hz, 2H), 7.12 (d, J = 8.8 Hz, 2H), 6.90 (d, J = 8.2 Hz, 1H), 6.63 (d, J = 5.0 Hz, 1H), 3.59 (t, J = 4.6 Hz, 4H), 2.53-2.52 (m, 2H), 2.47-2.44 (m, 2H), 2.39 (s, 4H). MS (ESI) m/z: 466.3 [M + H].sup.+ 14 [00024] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 10.58 (s, 1H), 9.45 (s, 1H), 8.28 (dd, J = 5.0, 1.1 Hz, 1H), 7.95 (d, J = 2.1 Hz, 1H), 7.74 (ddd, J = 8.9, 7.4, 1.9 Hz, 1H), 7.45 (d, J = 8.4 Hz, 1H), 7.31 (d, J = 8.6 Hz, 1H), 7.25 (dd, J = 8.6, 2.2 Hz, 1H), 7.02- 6.98 (m, 1H), 3.58 (t, J = 4.6 Hz, 4H), 3.47 (t, J = 6.5 Hz, 2H), 2.53 (t, J = 6.6 Hz, 2H), 2.42 (s, 4H). MS (ESI) m/z: 399.6 [M + H].sup.+ 15 [00025] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 8.25 (dd, J = 5.7, 3.8 Hz, 1H), 8.00 (d, J = 8.6 Hz, 2H), 7.88-7.84 (m, 1H), 7.52 (d, J = 7.7 Hz, 2H), 7.50-7.47 (m, 1H), 7.42 (d, J = 7.8 Hz, 1H), 7.26 (d, J = 8.7 Hz, 2H), 3.60-3.57 (m, 4H), 3.46 (t, J = 6.6 Hz, 4H), 2.53 (d, J = 6.6 Hz, 2H), 2.42 (s, 2H). MS (ESI) m/z: 448.3 [M + H].sup.+ 16 [00026] .sup.1H NMR (400 MHz, DMSO-d.sub.6) δ 9.23 (s, 2H), 7.95 (dd, J = 6.3, 2.6 Hz, 1H), 7.88 (d, J = 2.1 Hz, 1H), 7.37 (dd, J = 8.9, 4.2, 2.7 Hz, 1H), 7.28 (dt, J = 8.8, 4.5 Hz, 2H), 7.19 (dd, J = 8.6, 2.1 Hz, 1H), 3.60-3.56 (m, 4H), 3.46 (t, J = 6.6 Hz, 2H), 2.53 (d, J = 6.6 Hz, 2H), 2.42 (s, 4H). MS (ESI) m/z: 494.5 [M + H].sup.+ 17 [00027] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 9.48 (s, 1H), 9.21 (s, 1H), 7.87 (d, J = 40.0 Hz, 2H), 7.57 (s, 1H), 7.28 (s, 4H), 3.55 (s, 6H), 2.41 (s, 6H). MS (ESI) m/z: 482.6 [M + H].sup.+ 18 [00028] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 8.59 (s, 2H), 7.88 (d, J = 2.0 Hz, 1H), 7.79 (s, 1H), 7.36 (d, J = 8.4 Hz, 2H), 7.29 (d, J = 8.6 Hz, 1H), 7.16 (dd, J = 8.6, 2.1 Hz, 1H), 7.10 (d, J = 8.4 Hz, 2H), 3.58 (t, J = 4.4 Hz, 4H), 3.48-3.45 (m, 2H), 2.54 (t, J = 6.2 Hz, 2H), 2.51 (dd, J = 5.9, 2.2 Hz, 2H), 2.42 (s, 4H), 1.15 (t, J = 7.6 Hz, 3H). MS (ESI) m/z: 426.3 [M + H].sup.+ 19 [00029] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 8.97 (s, 1H), 8.90 (s, 1H), 7.88 (s, 1H), 7.77 (s, 1H), 7.35 (d, J = 8.6 Hz, 2H), 7.27 (d, J = 8.5 Hz, 1H), 7.18 (d, J = 8.5 Hz, 1H), 6.83 (d, J = 8.6 Hz, 2H), 4.53-4.47 (m, 1H), 3.58 (s, 4H), 3.46 (d, J = 5.1 Hz, 2H), 3.33 (s, 2H), 2.42 (s, 4H), 1.24 (s, 3H), 1.23 (s, 3H). MS (ESI) m/z: 456.1 [M + H].sup.+ 20 [00030] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 7.89 (d, J = 1.8 Hz, 1H), 7.39 (d, J = 8.4 Hz, 2H), 7.25 (d, J = 8.6 Hz, 1H), 7.19 (dd, J = 8.6, 1.7 Hz, 1H), 7.12 (d, J = 8.5 Hz, 2H), 3.59-3.57 (m, 4H), 3.45 (t, J = 6.6 Hz, 2H), 2.85-2.79 (m, 1H), 2.53 (d, J = 6.7 Hz, 2H), 2.42 (s, 4H), 1.19 (s, 3H), 1.17 (s, 3H). MS (ESI) m/z: 440.2 [M + H].sup.+ 21 [00031] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 8.82 (s, 1H), 8.64 (s, 1H), 7.85 (d, J = 2.2 Hz, 1H), 7.76 (t, J = 5.5 Hz, 1H), 7.48 (d, J = 8.9 Hz, 2H), 7.31 (d, J = 8.9 Hz, 2H), 7.28 (d, J = 8.6 Hz, 1H), 7.16 (dd, J = 8.6, 2.2 Hz, 1H), 3.39 (dd, J = 12.8, 6.3 Hz, 2H), 2.61 (t, J = 6.8 Hz, 2H), 2.53 (d, J = 7.1 Hz, 2H), 2.50-2.49 (m, 2H), 0.97 (t, J = 7.1 Hz, 6H). MS (ESI) m/z: 418.5 [M + H]+ 22 [00032] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 9.76 (s, 1H), 9.58 (s, 1H), 7.89 (s, 1H), 7.75 (s, 1H), 7.54 (d, J = 8.7 Hz, 2H), 7.29 (d, J = 8.7 Hz, 2H), 7.26 (s, 1H), 7.23 (d, J = 9.8 Hz, 1H), 3.43 (d, J = 4.9 Hz, 2H), 3.34 (s, 4H), 2.82 (dd, J = 22.5, 11.2 Hz, 4H), 1.93 (t, J = 10.7 Hz, 3H), 0.87 (t, J = 6.7 Hz, 3H). MS (ESI) m/z: 444.3 [M + H].sup.+ 23 [00033] .sup.1H NMR (400 MHz, DMSO-d.sub.6) δ 7.93 (s, 1H), 7.67 (d, J = 8.5 Hz, 2H), 7.55 (d, J = 8.6 Hz, 2H), 7.33-7.19 (m, 2H), 3.44 (t, J = 6.5 Hz, 2H), 2.51 (s, 4H), 2.43 (s, 2H), 2.32 (d, J = 5.2 Hz, 4H), 2.14 (s, 3H). MS (ESI) m/z: 479.2 [M + H].sup.+ 24 [00034] .sup.1H NMR (400 MHz, DMSO-d.sub.6) δ 9.57 (s, 1H), 9.39 (s, 1H), 7.88 (s, 1H), 7.83 (d, J = 5.3 Hz, 1H), 7.53 (d, J = 8.6 Hz, 2H), 7.30 (d, J = 8.6 Hz, 2H), 7.22 (d, J = 8.5 Hz, 1H), 3.45 (d, J = 5.2 Hz, 2H), 2.63 (t, J = 6.6 Hz, 2H), 1.69 (s, 4H), 1.23 (s, 4H). MS (ESI) m/z: 416.5 [M + H].sup.+ 25 [00035] .sup.1H NMR (400 MHz, DMSO-d.sub.6) δ 9.12 (s, 1H), 8.95 (s, 1H), 7.80 (d, J = 1.9 Hz, 1H), 7.73 (t, J = 5.2 Hz, 1H), 7.44 (d, J = 8.8 Hz, 2H), 7.25 (d, J = 8.8 Hz, 2H), 7.12 (dd, J = 8.4, 1.9 Hz, 1H), 2.39 (t, J = 6.5 Hz, 2H), 2.12 (s, 6H), 2.11 (s, 2H). MS (ESI) m/z: 390.6 [M + H].sup.+ 26 [00036] .sup.1H NMR (600 MHz, DMSO-d.sub.6) δ 7.85 (s, 1H), 7.47 (d, J = 8.6 Hz, 2H), 7.22 (d, J = 8.6 Hz, 2H), 7.17 (d, J = 8.5 Hz, 1H), 7.13 (d, J = 8.3 Hz, 1H), 3.56 (s, 4H), 3.32 (t, J = 6.8 Hz, 2H), 2.35 (d, J = 7.0 Hz, 2H), 2.33 (s, 4H), 1.75-1.71 (m, 2H). MS (ESI) m/z: 446.3 [M + H].sup.+ 27 [00037] MS (ESI) m/z: 550.6 [M + H].sup.+ 28 [00038] MS (ESI) m/z: 504.5 [M + H].sup.+ 29 [00039] MS (ESI) m/z: 518.3 [M + H].sup.+ 30 [00040] MS (ESI) m/z: 474.1 [M + H].sup.+ 31 [00041] MS (ESI) m/z: 531.5 [M + H].sup.+ 32 [00042] MS (ESI) m/z: 536.4 [M + H].sup.+ 33 [00043] MS (ESI) m/z: 564.2 [M + H].sup.+ 34 [00044] MS (ESI) m/z: 584.3 [M + H].sup.+ 35 [00045] MS (ESI) m/z: 396.2 [M + H].sup.+ 36 [00046] MS (ESI) m/z: 438.5 [M + H].sup.+ 37 [00047] MS (ESI) m/z: 514.1 [M + H].sup.+ 38 [00048] MS (ESI) m/z: 417.5 [M + H].sup.+ 39 [00049] MS (ESI) m/z: 445.3 [M + H].sup.+ 40 [00050] MS (ESI) m/z: 585.1 [M + H].sup.+ 41 [00051] MS (ESI) m/z: 483.4 [M + H].sup.+ 42 [00052] MS (ESI) m/z: 551.1 [M + H].sup.+ 43 [00053] MS (ESI) m/z: 569.4 [M + H].sup.+ 44 [00054] MS (ESI) m/z: 401.2 [M + H].sup.+ 45 [00055] MS (ESI) m/z: 443.1 [M + H].sup.+ 46 [00056] MS (ESI) m/z: 533.0 [M + H].sup.+ 47 [00057] MS (ESI) m/z: 610.5 [M + H].sup.+

[0191] The compounds of the present invention were studied for the in vitro enzyme activity of soluble epoxide hydrolase (sEH), and the results were as follows.

[0192] The benzothiazole skeleton compounds (concentration: 0.1 μM) according to the above formula I of the present invention were tested for the in vitro sEH enzyme activity by fluorescence analysis. The reference t-AUCB was home-made by the research group (Hwang S H, Wecksler A T, Zhang G, et al. Synthesis and biological evaluation of sorafenib- and regorafenib-like sEH inhibitors. Bioorganic & Medicinal Chemistry Letters, 2013, 23(13): 3732-3737.).

[0193] 12 μL of sEH enzyme (human recombinant, 0.5 mg/mL, Cayman Chemical) was diluted with 588 μL of buffer (25 mM bis-Tris, pH 7.0). The fluorescent substrate was PHOME (cyano-(6-methoxy-naphthalen-2-yl)-methyl (3-phenyl-oxiranyl)-acetate) in DMSO (10 μM, Cayman Chemical). The compound to be tested was dissolved in 100% DMSO at a concentration of 4 μM. 185 μL of buffer (25 mM bis-Tris, pH 7.0), 5 μL of compound solution, and 5 μL of diluted sEH enzyme were added to the wells of a 96-well plate, and finally 5 μL of substrate solution was added to initiate the reaction. After incubating at 37° C. for 15 min, the fluorescence signal was measured with a microplate reader (excitation wavelength 330 nm, emission wavelength 465 nm). The background group and the full-active group were set at the same time, wherein the background group excluded the compound and the enzyme (replaced by DMSO and buffer, respectively), and the full-active group excluded the compound (replaced by DMSO). The inhibition was calculated from the data of the full-active group (F.sub.0) and the compound group (F.sub.1) after deducting the fluorescence signal of the background group:

Inhibition (%)=(F.sub.0−F.sub.1)/(F.sub.0)×100.

[0194] The in vitro sEH enzyme activity test results of the compounds of Examples were shown in Table 2.

TABLE-US-00002 TABLE 2 Example compounds sEH % inhibition, @ 0.1 μM Example 1 76.1 Example 2 11.7 Example 3 32.9 Example 4 77.3 Example 5 47.0 Example 6 2.15 Example 7 59.9 Example 8 19.2 Example 9 28.2 Example 10 2.16 Example 11 22.0 Example 12 68.7 Example 13 63.9 Example 14 16.2 Example 15 39.0 Example 16 79.7 Example 17 70.3 Example 18 84.7 Example 19 76.6 Example 20 75.2 Example 21 86.2 Example 22 67.5 Example 23 43.7 Example 24 28.4 Example 25 70.4 Example 26 36.5 Example 27 79.4 Example 28 90.5 Example 29 69.0 Example 30 27.5 Example 31 70.9 Example 32 77.6 Example 33 15.8 Example 34 32.5 Example 35 10.3 Example 36 45.6 Example 37 66.8 Example 38 57.2 Example 39 41.5 Example 40 43.0 Example 41 34.7 Example 42 52.1 Example 43 78.2 Example 44 55.9 Example 45 45.2 Example 46 67.9 Example 47 32.5 t-AUCB 68.7

[0195] Some compounds of the present invention were studied for the in vitro IC.sub.50 of the soluble epoxide hydrolase (sEH), and the results were as follows.

[0196] The benzothiazole skeleton compounds according to the above formula I of the present invention were tested for the in vitro sEH enzyme activity by fluorescence analysis. The reference t-AUCB was home-made by the research group.

[0197] 12 μL of sEH enzyme (human recombinant, 0.5 mg/mL, Cayman Chemical) was diluted with 588 μL of buffer (25 mM bis-Tris, pH 7.0). The fluorescent substrate was PHOME (cyano-(6-methoxy-naphthalen-2-yl)-methyl (3-phenyl-oxiranyl)-acetate) in DMSO (10 μM, Cayman Chemical). The compound to be tested was dissolved in 100% DMSO at a concentration of 4 μM, and successively diluted into solutions with different concentrations (2 μM, 1 μM, 0.5 μM, 0.25 μM, 0.04 μM, 0.02 μM, 0.004 μM, and 0.0004 μM). The inhibitions at different concentrations for the compound were respectively measured in accordance with the inhibition assay, to calculate IC.sub.50.

[0198] The sEH enzyme IC.sub.50 activity data for some Examples were shown in Table 3.

TABLE-US-00003 TABLE 3 Examples IC.sub.50 (nM) Ex. 1 compound 4.8 Ex. 4 compound 122 Ex. 7 compound 9.2 Ex. 12 compound 4.1 Ex. 13 compound 2.8 Ex. 16 compound 0.25 Ex. 18 compound 6.7 Ex. 27 compound 0.02 Ex. 29 compound 2.6 Ex. 25 compound 27.1 Ex. 30 compound 1.9 Ex. 40 compound 0.11 t-AUCB 6.8

[0199] The preliminary in vitro sEH enzyme activity test results showed that, the compounds of general formula I as claimed in the present invention had a good inhibitory activity on sEH, and some compounds were equivalent to or better than the positive control drug t-AUCB.

Example 48 Measurement of Anti-Fibrosis Effect

[0200] Male C57BL/6J mice (6 to 8 weeks old) (SPF (Beijing) Biotechnology Co., Ltd.) were divided into 3 groups: sham group, unilateral ureteral obstruction (UUO) group, and UUO+Ex. 16 compound group. After the mice were anesthetized, the left ureter was ligated and cut to create a model. In the sham group, the ureter was only isolated without ligation. The experimental animals were administrated 72 hours before modeling, and the aqueous solution of Ex. 16 compound (10% PEG400, 10% Tween 80, concentration: 9 mg/mL) was intraperitoneally injected at a dose of 30 mg.Math.kg.sup.−1.Math.d.sup.−1; and the sham group and UUO group were intraperitoneally injected with an equal volume of blank solvent. 7 days after modeling, the animals were sacrificed, and samples were taken for testing. The results showed that, the compound of Example 16 could maintain the level of EETs in mouse kidney tissue (Kim J, Imig J D, Yang J, et al. Inhibition of soluble epoxide hydrolase prevents renal interstitial fibrosis and inflammation. Am J Physiol Renal Physiol, 2014, 307(8): F971-F980.), reduce the collagen deposition, and decrease the fibrotic areas. The results were shown in FIGS. 1 and 2.

Example 49 Measurement of Anti-Inflammatory Effect

[0201] Male KM mice (6 to 8 weeks old) (SPF (Beijing) Biotechnology Co., Ltd.) were subcutaneously with 50 μL of 1% λ-carrageenan saline solution at planta to prepare the model of inflammation and swelling (Posadas I, Bucci M, Roviezzo F, et al. Carrageenan-induced mouse paw oedema is biphasic, age-weight dependent and displays differential nitric oxide cyclooxygenase-2 expression. British Journal of Pharmacology, 2004, 142(2):331-338.). 1 hour in advance, the mice were intraperitoneally injected with the solutions of the compounds of Examples 12, 18, 27, and 40 (10% PEG 400, 10% Tween 80) or the blank solvent, respectively. Taking the initial paw thickness of the mice before modeling as 100%, the changes in the paw thickness of the mice were measured. The results showed that, the compounds could significantly inhibit the carrageenan-induced paw swelling in mice, and the effects were better than that of celecoxib. The results were shown in FIG. 3.

Example 50 Measurement of Brain Injury Protection

[0202] 45 male SD rats (6 to 8 weeks old) (SPF (Beijing) Biotechnology Co., Ltd.) were divided into the sham group, blank solvent group, and dosing group. 72 hours after intraperitoneally injecting the compound of Example 12 or blank solvent, a traumatic brain injury model was established using the modified Feeney method (Marmarou A, Foda M A, van den Brink W, et al., A new model of diffuse brain injury in rats. Part I: Pathophysiology and biomechanics. Journal of Neurosurgry, 1994, 80(2):291 to 300.). 23 hours after model establishment, three mice in each group were injected with Evans blue solution through the tail vein, and after 1 hour of circulation, the mice were decapitated and the brain was taken out to determine the content of Evans blue (EB), so as to study the permeability. Another three rats were taken to measure the water content in brain. The results showed that, the compound of Example 12 could reduce the water content and permeability in brain. The results were shown in Table 4.

TABLE-US-00004 TABLE 4 Group Water content in brain (%) EB content (μg/g) Sham group 77.46 ± 0.57 *  9.26 ± 1.24 * Blank solvent group 82.45 ± 1.47   30.86 ± 3.33   Example 12 79.46 ± 0.68 * 25.23 ± 1.63 * (30 mg/kg) * Compared with the blank solvent group, p < 0.05

Example 51 Measurement of Hypoglycemic Effect

[0203] Male Balb/c mice (6 to 8 weeks old) (SPF (Beijing) Biotechnology Co., Ltd.) were intraperitoneally injected with streptozotocin STZ (40 mg/kg) once a day for 5 consecutive days, to prepare a diabetic model (Like A A, Rossini A A. Streptozotocin-induced pancreatic insulitis: new model of diabetes mellitus. Science, 1976, 193(4251):415-7). The mice after modeling were intraperitoneally injected with the solution of compound of Example 12 once a day. After two weeks, the blood glucose of the dosing group was significantly lower than that of the model group, and the glucose tolerance was higher than that of the model group. The results were shown in FIG. 4.

Example 52 Improvement Effect on Diabetic Retinopathy

[0204] Male Wistar rats (180 to 200 g) (Experimental Animal Center, Hebei Medical University) were intraperitoneally injected with streptozotocin STZ (60 mg/kg) to prepare a diabetic model, and were fed for 3 months to induce a retinopathy model (Miyamoto K, Khosrof S, Bursell S E, et al. Prevention of leukostasis and vascular leakage in streptozotocin-induced diabetic retinopathy via intercellular adhesion molecule-1 inhibition. Proc Natl Acad Sci USA, 1999, 96(19): 10836-10841). The compound of Example 40 was dissolved in 10% hydroxypropyl-p-cyclodextrin solution, to be prepared into eye drops with a content of 0.1% for the compound of Example 40. The rats were topically administrated in eyes every day. After 6 months, the rats developed non-proliferative diabetic retinopathy symptoms of increased retinal capillary free pericytes and increased vascular leakage, while in Example 40 group these symptoms were significantly alleviated. The results were shown in FIG. 5.

Example 53 Measurement of Analgesic Effect

[0205] Male SD rats (6 to 8 weeks old) (SPF (Beijing) Biotechnology Co., Ltd.) were subcutaneously injected with 50 μL of 1% λ-carrageenan saline solution at planta to prepare an inflammatory pain model (Rose T E, Morisseau C, Liu J Y, et al. 1-Aryl-3-(1-acylpiperidin-4-yl)urea inhibitors of human and murine soluble epoxide hydrolase: structure-activity relationships, pharmacokinetics, and reduction of inflammatory pain. J Med Chem, 2010, 53(19): 7067-7075). The compounds of Examples 12 and 40 were added to 0.5% sodium carboxymethylcellulose solution and ground to prepare a suspension with a concentration of 15 mg/mL. 1 hour before modeling, the rats were intragastrically administrated. The changes in the paw withdrawal time of rats were measured with a hot plate dolorimeter. The results showed that, the compounds of Examples 12 and 40 could significantly prolong the paw withdrawal time of rats in the hot plate dolorimeter, increase the pain threshold and relieve the pain. The results were shown in FIG. 6.

Example 54 Measurement of Antidepressant Effect

[0206] Male KM mice (6 to 8 weeks old) (SPF (Beijing) Biotechnology Co., Ltd.) swam in advance for 10 min, and were injected with lipopolysaccharide (0.5 mg/kg). After 23 hours, the mice were subcutaneously injected with the solutions of the compounds of Examples 12 and 40 or the blank solvent. After 1 hour, the mice were subjected to the forced swimming test for 6 min, and the immobility time (s) in later 4 minute for the mice in each group was recorded. The results showed that, the compounds of Examples 12 and 40 could significantly reduce the immobility time of mice in forced swimming. The results were shown in FIG. 7.

[0207] Those skilled in the art should understand that, although the invention is described in details with reference to the above Examples, the invention is not limited to these specific Examples. Based on the methods and technical solutions taught by the invention, those skilled in the art can make appropriate modifications or improvements without departing from the spirit of the invention, and the equivalent embodiments thus obtained are all within the scope of the invention.