An imidazopyridine compound of the formula :
wherein R' is lower alkynyl, lower alkynyloxy(lower)alkyl or N,N-di(lower)alkylamino(lower)alkynyl,
R2 is lower alkyl,
R3 is ar(lower)alkyl substituted by one or more substituent(s) selected from cyano, trihalo(lower)alkyl, carbamoyl, protected amino, carboxy, protected carboxy, hydroxy, hydroxy(lower)alkyl, protected hydroxy-(lower)alkyl, protected hydroxy and protected amino(lower)alkyl or ar(lower)alkyl substituted by lower alkyl and one additional substituent selected from hydroxy(lower)alkyl, amino, N-lower alkyl-N-protected amino, protected amino and lower alkylamino, and
R4 is hydrogen or lower alkyl,
and a pharmaceutically acceptable salt thereof, processes for their preparation and pharmaceutical compositions comprising them. The invention also comprises intermediates of the formula
and of the formula
式中的
咪唑吡啶化合物
其中 R' 是低级炔基、低级炔
氧基(低级)烷基或
N,N-二(低级)烷基
氨基(低级)炔基、
R2 是低级烷基
R3 是被一个或多个选自
氰基、三卤代(低级)烷基、
氨基甲酰基、受保护
氨基、羧基、受保护羧基、羟基、羟基(低级)烷基、受保护羟基(低级)烷基、受保护羟基和受保护
氨基(低级)烷基的取代基取代的 ar(低级)烷基,或被低级烷基和一个选自羟基(低级)烷基、
氨基、N-低级烷基-N-受保护
氨基、受保护
氨基和低级烷基
氨基的取代基取代的 ar(低级)烷基,以及
R4 是
氢或低级烷基、
及其药学上可接受的盐、其制备工艺和包含它们的药物组合物。本发明还包括式
和式