A compound of the formula :
wherein
R¹ isamino or protected amino,
R² islower alkyl substituted with 1 to 6 halogen,
R³ ishydroxy(lower)alkyl, protected hydroxy(lower)alkyl or halo(lower)alkyl and
R⁴ ishydrogen, or
R³ and R⁴ arelinked together to form lower alkylene, and
R⁵ ishydrogen or an amino protective group,
and a pharmaceutically acceptable salt thereof, processes for their preparation and pharmaceutical compositions comprising them. The invention also relates to intermediate products of the formula
and processes for their preparation.
式中的化合物:
式中
R¹ 是
氨基或受保护的
氨基、
R² 是被 1 至 6 个卤素取代的低级烷基、
R³ 是羟基(低级)烷基、受保护的羟基(低级)烷基或卤代(低级)烷基,以及
R⁴ 是氢,或
R³ 和 R⁴ 连接在一起形成低级亚烷基,且
R⁵ 是氢或
氨基保护基团、
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。本发明还涉及式中的中间产物
及其制备工艺。