Biphenylmethane derivative and pharmacological use

Abstract

The biphenylmethane derivative having the formula (I) is useful to prevent and treat hypertension and cardiac failure. ##STR1## in which R1 is hydrogen, an alkyl, a cycloalkyl, a halogenated alkyl, --S--R7, --SO2--R7, --C.tbd.C--R7 or --(CH2)p--OR7, R7 being hydrogen, an alkyl, a cycloalkyl or a halogenated alkyl, p being zero or 1, --A1.dbd.A2--A3.dbd.A4-- is --CH.dbd.CH--CH.dbd.CH--, --N.dbd.CH--CH.dbd.CH--, --CH.dbd.N--CH.dbd.CH--, --CH.dbd.CH--N.dbd.CH--, --CH.dbd.CH--CH.dbd.N-- or --CH.dbd.N--CH.dbd.N--, R2 and R3 are each hydrogen, a halogen, a lower alkyl, a lower alkoxy, a carbamoyl or cyano, R4 is hydrogen or a lower alkyl, R5 is 1H-tetrazol-5-yl, carboxyl (--COOH) or a carboxylic ester and R6 is hydrogen, a halogen, hydroxyl or a lower alkoxy, or a pharmacologically acceptable salt thereof.

Dependencies are inferred from the claim text.