N-ARALKYL BENZIMIDAZOLE DERIVATIVES, THEIR PRODUCTION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

Benzimidazole derivs. of formula (I) and their salts are new. In (I) A = a benzene ring opt. substd. in addn. to R1; R1 = H or opt. substd. hydrocarbon gp.; R2 = a gp. capable of forming an anion or convertible into an anion; X = a direct bond or a spacer 1-2 atoms long between the phenylene and phenyl gp.; R' = carboxyl, its esters or amides, or a gp. capable of forming an anion or convertible to an anion; Y = -O-, -S(O)m- or -N(R4)-, (where m = 0, 1 or 2 and R4 = H or opt. substd. alkyl); and n = 1 or 2. 33 cpds. are specifically claimed including ethyl-2-ethoxy-1-((2'- (1H-tetrazol-5-yl)biphenyl-4-yl)methyl) benzimidazole-7-carboxylate. Also claimed is a stable crystal of 1-(cyclohexyloxycarbonyloxy) ethyl-2-ethoxy-1-((2'-(1H tetrazol-5-yl) -biphenyl-4-yl)-methyl)benzimidazole -7-carboxylate.