专利号:EP-1590332-B1 优先权日:2003-01-09 标题:A process for the synthesis of bisbenzimidazoles and their derivatives. 发明人:JAIN AKASH; TAWAR URMILA; CHANDRA RAMESH; DWARAKANATH B S; CHAUDHURY N K; TANDON VIBHA 权利人:UNIV DELHI 摘要:A process for the synthesis of bisbenzimidazoles and its derivations comprising; (i) reacting 5 chloroaniline with zinc dust and acetic anhydride to produce 5 chloroacetanilide; (ii) reacting 5 chloroacetanilide with HN03 to produce 2-nitro-5-chloroacetanilide; (ix) adding sodium methoxide to 2-nitro-5-ch1oroaniline; (x) heating 2-nitro-5-chloroaniline, methyl piperazine, anhydrous K2CO3 and Dimethyl formamide at 100-120°C produce a mixture which is cooled by pouring ice and is filtered to obtain 5-(4'-methylpiperazin-1'-yl)-2-nitroaniline; (xi) treating 5-(4'-methylpiperazin-l'yl)-2-nitroaniline with Pd/C to produce 2-amino-4-(4'-methylpiperazin-1'-yl) aniline; (xii) refluxing a mixture of 2-amino-4-(4'-methylpiperazin-1'yl) aniline and ethyl-4-amino-3-nitrobenzenecarboximidate hydrochloride in presence of ethanol/glacial acetic acid to produce 4-[5'-(4'-methylpiperazin-1'-yl) 15 benzimidazol-2'-yl)-2-nitroaniline; (xiii) treating a solution of 4-[5'-(4'-methylpiperazin-1'-yi) benzimidazol-2'-yl)-2-nitroaniline with palladium on carbon to yield 2-amino-4-[5'-(4'-Methylpiperazin-1'-yl)benzimidazol-2'-yl]aniline; (xiv) heating 2-amino-4-[5'-(4'-Methylpiperazin-1'-yl)benzimidazol-2'-yl]aniline and 3-4-dimethoxy benzaldehyde using nitrobenzene as a solvent at 110-150°C to produce (DMA) i.e 5-(4-methylpiperazin-1-yl)-2-[2'-(3,4-dimethoxyphenyl)-5'-benzimidazolyl] benzimidazole; (ix) heating 2-amino-4-[5'-(4'-Methylpiperazin-1'-yl) benzimidazol-2'-YI] aniline and 5-Formyl-[3-methoxy-4-hydroxy benzimidazole] using nitrobenzene at 110°C to 150°C in presence of argon to produce (TBZ) i.e 5-(4-methylpiperazine-1-yl)-2-[2' (2'-(4-hydroxy-3methoxyphenyl)5'benzimidazolyl) -5'- benzimidazolyl] benzimidazole.
专利号:US-6753347-B2 优先权日:1999-06-28 标题:Intermediates for the synthesis of benzimidazole derivatives and a process for the preparation thereof 发明人:KISHI NAOYUKI; NAKAMURA YOSHITAKA; ABE NARUMI; TAKEBAYASHI TOYONORI 权利人:SANKYO CO 摘要:This invention provides a process for the preparation of a benzimidazole derivative (I) or a pharmaceutically acceptable salt thereof, n wherein R 1 is C 1 -C 6 alkyl, C 1 -C 6 alkoxyl, etc., R 2 is C 1 -C 6 alkyl, and R 3 is hydrogen or a protecting group, which exhibits excellent hyopoglycemic action, said process comprising condensation of an amine derivative (III) with a carboxylic acid derivatives (II) to afford a compound (IV), followed by cyclization of compound (IV) in the presence of an acid.
专利号:US-2003199580-A1 优先权日:1999-06-28 标 题:Intermediates for the synthesis of benzimidazole derivatives and a process for the preparation thereof
专利号:US-9603950-B1 优先权日:2015-10-25 标题 :Compounds of imaging agent with HDAC inhibitor for treatment of Alzheimer syndrome and method of synthesis thereof 发明人:LI MING-HSIN; SHIUE CHYNG-YANN; CHANG HAN-CHIH; CHU HAN-HSIANG 权利人:LI MING-HSIN; SHIUE CHYNG-YANN; CHANG HAN-CHIH; CHU HAN-HSIANG; INST NUCLEAR ENERGY RES 摘要:A method of synthesizing a compound of imaging agent with HDAC (histone deacetylase) inhibitor consists of two parts, the first part of the method is to provide the inhibitor of HDAC with a compound of imaging agent that includes HDAC inhibitor BNL-26 (C 22 H 23 N 3 O) and its analogs to be labeled with radionuclide F-18, producing a series of new nuclear medicine tracers: BNL-26-CH 2 CH 2 18F, BNL-26a-CH 2 CH 2 18FF, BNL-26b-CH 2 CH 2 18F, BNL-26c-CH 2 CH 2 18F and BNL-26d-CH 2 CH 2 18F. These nuclear medicine with imaging agents can be used as a tracer in vivo binding to over-expression HDAC and produce a HDAC nuclear medicine imaging effect to serve for clinical diagnosis. The second part of the method is to provide a slightly adjusted a structural framework of BNL-26 and use pyridine to substitute the benzene ring of the BNL-26 structure, and then synthesize with other substituent to produce a series of additional 30 more HDAC inhibitors, named from Iner-1 to Iner-30 compounds.
专利号:EP-1590332-A1 优先权日:2003-01-09 标题:A process for the synthesis of bisbenzimidazoles and its derivations
专利号:AT-E530533-T1 优先权日:2005-05-17 标 题 :METHOD FOR SYNTHESIS OF HETEROCYCLIC COMPOUNDS
[参考文献]: R M Sánchez-Alonso, Et Al. Piperazine Derivatives Of Benzimidazole As Potential Anthelmintics. Part 1: Synthesis And Activity Of Methyl-5-(4-Substituted Piperazin-1-Yl)Benzimidazole-2-Carbamates. Pharmazie. 1989 Sep;44(9):606-7.
合成参考文献
摘要:Aggarwal, P.; Bebbington, M. W. P., Science of Synthesis Knowledge Updates, (2012) 2, 428. 摘要:M. I. Vinnik, R. N. Kruglov, and N. M. Chirkov. Zh. Fiz. Khim, 30, 827 (1961). 摘要:C.K. Hancock, R.A. Brown and J.P. Idoux. J. Org. Chem. 33, 1947 (1968). 摘要:M.I. Vinnik. Uspekhi Khim. 35, 1922 (1966). 摘要:D.P.N. Satchell and J.L. Wardell. J. Chem. Soc. 1964, 4134.