EP0531874A1 — Imidazopyridine derivatives and process for preparation thereof

USPTO Abstract

An imidazopyridine derivative of the formula [I]: wherein R¹ is hydrogen or lower alkyl, R² is hydrogen, lower alkylsulfonyl or a group of the formula: (Z is oxygen atom or two hydrogen, R⁰ is substituted or unsubstituted lower alkyl, lower alkoxy, 5- or 6-membered heteromonocyclic, substituted or unsubstituted phenyl, hydrogen, substituted or unsubstitued amino or lower alkenyl), R³ is carboxyl or lower alkoxycarbonyl and Ring A is substituted or unsubstituted phenyl, and pharmaceutically acceptable salt thereof, and processes for preparation thereof, said imidazopyridine derivatives have excellent angiotensin II antagonistic activities and are useful in prophylaxis and treatment of hypertension.