专利号:WO-2004092142-A1 优先权日:2003-04-17 标 题:An improved process for manufacture of substituted benzimidazoles 发明人:VYAS KETAN DHANSUKHAL; SINGH DHARMENDRA; NANDAVADEKAR SANJAY; BHISE SANJAY; JADHAV ATUL; DESAI HEMAL 权利人:IPCA LAB LTD; VYAS KETAN DHANSUKHAL; SINGH DHARMENDRA; NANDAVADEKAR SANJAY; BHISE SANJAY; JADHAV ATUL; DESAI HEMAL 摘要:The present invention relates to a process for the production of benzimidazole derivatives comprising providing an amino acetamido benzene derivative; and condensing and cyclising the aminoacetamido benzene derivative in the presence of a base and in the presence of a cyclising agent under conditions effective to form the benzimidazole derivative. The acetamido benzene derivative has the formula (I) wherein R is OMe or OCHF2. The resulting substituted benzimidazoles are key intermediates in the synthesis of H<+>/K<+>-ATPase irreversible inhibitors, most particularly Omeprazole.
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合成参考文献
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