METHOD FOR MANUFACTURING A 6-SUBSTITUTED-1-METHYL-1H-BENZIMIDAZOLE DERIVATIVE, AND MANUFACTURING INTERMEDIATE FROM SAID METHOD
申请人:Daiichi Sankyo Company, Limited
公开号:EP2505587A1
公开(公告)日:2012-10-03
It is intended to provide a novel method for manufacturing a 6-substituted 1-methyl-1H-benzimidazole derivative and an intermediate of said methods.
[Solution]
A method for manufacturing a 6-substituted 1-methyl-1H-benzimidazole derivative represented by the following general formula (IV)
[wherein R3 represents a hydrogen atom or a C1-C4 alkyl group], comprising manufacturing a 4-substituted N2-methylbenzene-1,2-diamine derivative from a particular 5-substituted N-methyl-2-nitroaniline derivative, subsequently reacting the resulting compound with 4-[(2,4-dioxo-1,3-thiazolidin-5-yl)methyl]phenoxy}acetic acid or an acid chloride or a mixed acid anhydride thereof, and subsequently subjecting the resulting compound to intramolecular dehydration condensation.