Biphenyl derivatives pharmaceutical compositions containing the same and processes for the preparation thereof

摘要

Compounds of formula (I) : [wherein: A represents a group (IIa), (IIb) or (IIc) : R<1> is alkyl, alkenyl, cycloalkyl or a group of formula R<4>-Y-R<5>-, where: R<4> is hydrogen, alkyl, or cycloalkyl, R<5> is a single bond or alkylene, and Y is oxygen, sulphur or imino group; R<2> is hydrogen, halogen, Optionally substituted alkyl, optionally substituted alkenyl, optionally substituted cycloalkyl, hydroxy, amino, alkylamino, dialkylamino, formyl, alkylcarbonyl, alkoxy, alkylthio, cyano or nitro; R<3> is hydrogen, alkyl, carboxy, protected carboxy, carbamoyl or tetrazol-5-yl; X is of formula -CH=, -N= or -C(COOR<6>)=, where R<6> is hydrogen or a carboxy-protecting group; Z is a single bond, alkylene or vinylene; and B is carboxy, protected carboxy or tetrazol-5-yl]; and pharmaceutically acceptable salts and esters thereof have the ability to inhibit the action of angiotensin II and thus can be used for the treatment and prophylaxis of hypertension and cardiac iseases.