Cephem compounds, processes for their preparation and pharmaceutical compositions containing them
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0025199A2
公开(公告)日:1981-03-18
Cephem compounds of the formula:
wherein R1 is amino or a a protected amino group;
R2 is cyclo(lower)alkenyl;
R3 is carboxy or a protected carboxy group;
R'is hydrogen or a group of the formula: -CH2-R4a
[wherein R4a is acyloxy, amino (lower) alkylthio, a protected amino(lower) alkylthio group, pyridinium which may have suitable substituent(s) or a heterocyclicthio group which may have suitable substituent(s)], and R5 is hydrogen or lower alkyl, with proviso that R is COO- when R4a is pyridinium which may have suitable substituent(s), 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 nontoxic carrier or excipient. The invention also relates to the starting compounds
and their preparation.
式中的 Cephem 化合物:
其中 R1 是氨基或受保护的氨基;
R2 是环(低级)烯基
R3 是羧基或受保护的羧基;
R'是氢或一个式中的基团:-CH2-R4a
[其中 R4a 是酰氧基、氨基(低级)烷硫基、受保护的氨基(低级)烷硫基、可有适当取代基的吡啶鎓或可有适当取代基的杂环鎓基团],R5 是氢或低级烷基,但当 R4a 是可有适当取代基的吡啶鎓时,R 是 COO-、和其药学上可接受的盐及其制备工艺,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赋形剂。本发明还涉及起始化合物
及其制备方法。