| abstract |
1-Biphenylylmethyl-benzimidazole derivs. of formula (I) and their salts are new. (A) where: R1 = F, Cl, Br, 1-4C alkyl, cycloalkyl, CH2F, CHF2 or CF3 and is in the 4 position; R2 = R2 or may also be R2 when R4 = 1H-tetrazolyl; R'2 = 3-5C alkoxy substd. in the 3, 4 or 5 position by imidazolyl, or 2-5C alkoxy substd. in the 2, 3, 4 or 5 position by benzimidazolyl or tetrahydrobenzimidazolyl; R2 = e.g. (a) 2-(1-imadazolyl)ethoxy, 1-4C alkylsulphonyloxy, OSO2Ph or phenylalkylsulphonyloxy; (b) acylamino opt. N-substd. by 1-6C alkyl, Ph, cycloalkyl, phenylalkyl, cycloalkylalkyl, bicyclohexyl or biphenylyl, where acyl is 1-7C alkanoyl, 2-4C alkoxycarbonyl, 1-6C alkylsulphonyl, benzoyl, phenylsulphonyl, phenylalkylsulphonyl, naphthylsulphonyl, cycloalkylcarbonyl, phenylalkanoyl or cycloalkylalkanoyl, where phenyl rings are opt. substd. by 1-2 of F, Cl, Br, Me and OMe, or 3-oxopyridazylinyl or (l) 3-oxodihydropyridazinyl, opt. 2-substd. by alkyl or phenylalkyl and opt. further C-substd. by 1-2 alkyl gps., Het = a C- or imino-bonded 5-membered heteroaromatic ring or a C-bonded 6-membered heteroaromatic ring. (B) where: R1 = H or F, Cl, Br, 1-4C alkyl, CH2F, CHF2 or CF3 in the 5, 6 or 7 position; R2 = Het or a gp. as defined in (l) above; R3 and R4 are as defined in (A); provided that: (a) R2 is not 3-methylimidazo (4,5-b)pyridin-2-yl or 3-n-hexylimidazo(4,5-b) pyridin-2-yl in the 6 position when R1 = H, R3 = n-Pr and R4 = COOH; (b) R2 is not benzoxazol-2-yl in the 5 or 6 position when R1 = H, R3 = n-Pr or n-Bu and R4 = 1H-tetrazolyl; (c) R2 is not 1-methyl-2-benzimidazolyl in the 5 or 6 position or 1-n-butyl-2-benzimidazolyl, 1,5-dimethyl-2-benzimidazolyl or 1-methyl-5-trifluoromethyl -2-benzimidazolyl in the 6 postion when R1 = H, R3 = n-Pr and R4 = COOH; (d) R2 is not 1-methyl-2-benzimidazolyl in the 6 position when R1 = H, R3 = n-Bu and R4 = COOH or 1H-tetrazolyl; (e) R2 is not 2-benzimidazolyl in the 6 position when R1 = H, R3 = n-Bu and R4 = COOH; unless otherwise stated, alkanoyl, alkyl and alkoxy gps. are 1-3C and cycloalkyl gps. are 3-7C. |