Imidazolyl and pyridyl derivatives of phenyl substituted 1,4 -dihyropyridines and process for their preparation.

摘要

Imidazolyl and pyridyl derivatives of phenyl substituted 1,4-dihydropyridines of formula (I) <CHEM> A represents a direct linkage, -CH2-, CH2-CH2- or, when Het is <CHEM> A may also represent -CH=CH-; R is hydrogen, halogen, C1-C3 alkyl or C1-C3 alkoxy; each of R3 and R4 is a C1-C3 alkyl group; one of R1 and R2 is a group -OR min wherein R min is a C1-C6 alkyl ether unsubstituted or omega substituted by C1-C3 alkoxy or cyano, and the other is, independently, a) a group -OR min ; b) a group <CHEM> or c) a group -OR<IV> wherein R<IV> is hydrogen or a substituent selected from: <CHEM> are useful as Thromboxane A2 (TxA2 ) Synthase inhibitors and as calcium antagonists.