7-Acylaminocephalosporanic acid derivatives and processes for the preparation thereof
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0055465A2
公开(公告)日:1982-07-07
7-Acylaminocephalosporanic acid derivatives of the formula
wherein
R1 is amino or protected amino,
R2 is carboxy(lower) alkyl, protected carboxy-(lower)alkyl, carboxy(lower)alkenyl, protected carboxy-(lower)alkenyl, or lower unsaturated aliphatic hydrocarbon,
R3 is hydrogen, halogen, methyl, lower alkoxy, lower alkylthiomethyl, lower alkanoyloxymethyl or a heterocyclicthiomethyl which may have suitable substituent(s),
R4 is carboxy or protected carboxy,
R5 is hydrogen or lower alkyl, and
X is halogen,
provided that when R3 is lower alkanoyloxymethyl, then R2 is lower unsaturated aliphatic hydrocarbon, and pharmaceutically acceptable salts thereof, and process for their preparation, and also a pharmaceutical composition comprising, as an effective ingredient, the above compound in association with a pharmaceutically acceptable, substantially non toxic carrier or exipient. The invention also relates to the starting compounds
and their preparation.
式中的 7-酰氨基头孢烷酸衍生物
式中
R1 是氨基或受保护的氨基
R2 是羧基(低级)烷基、受保护的羧基(低级)烷基、羧基(低级)烯基、受保护的羧基(低级)烯基或低级不饱和脂肪烃、
R3 是氢、卤素、甲基、低级烷氧基、低级烷硫基甲基、低级烷酰氧基甲基或杂环硫基甲基,可带有合适的取代基、
R4 是羧基或受保护的羧基、
R5 是氢或低级烷基,以及
X 是卤素、
当 R3 为低级烷酰氧基甲基时,R2 为低级不饱和脂肪族烃,及其药学上可接受的盐和制备方法,以及一种药物组合物,其有效成分包括上述化合物与药学上可接受的、基本上无毒的载体或外加剂。本发明还涉及起始化合物
及其制备方法。