A compound of the formula
wherein R1 is amino or a protected amino group,
R2 is hydrogen or an organic group,
R3 is hydrogen, lower alkyl,
hydrory(lower)alkyl, protected hydroxy(lower)alkyl, amino(lower)alkyl, protected amino(lower)alkyl, carbamoyl-(lower)alkyl, N,N-di(lower)alkylcarbamoyl(lower)alkyl or an imino protective group,
R4 is hydrogen, lower alkyl, carboxy, protected carboxy, amino,protected amino or carbamoyl, and
Z is N or CH,
and a pharmaceutically acceptable salt thereof,
processes for their preparation and pharmaceutical compositions comprising them as an active ingredient in admixture with pharmaceutically acceptable carriers. The invention also relates to intermediates of the formula
and processes for their preparation.
式中的化合物
其中 R1 是
氨基或受保护的
氨基、
R2 是氢或有机基团
R3 是氢、低级烷基
R3是氢、低级烷基、羟基(低级)烷基、受保护的羟基(低级)烷基、
氨基(低级)烷基、受保护的
氨基(低级)烷基、
氨基甲酰基(低级)烷基、N,N-二(低级)烷基
氨基甲酰基(低级)烷基或
亚胺保护基团、
R4 是氢、低级烷基、羧基、保护羧基、
氨基、保护
氨基或
氨基甲酰基,以及
Z 是 N 或 CH、
及其药学上可接受的盐、
它们的制备工艺,以及将它们作为活性成分与药学上可接受的载体混合的药物组合物。本发明还涉及式
及其制备工艺。