申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04438113A1
公开(公告)日:1984-03-20
This invention relates to novel 7-acylaminocephalosporanic acid derivatives and pharmaceutically acceptable salts thereof, of high antimicrobial activity, said novel derivatives having the formula ##STR1## wherein R.sup.1 is amino or protected amino, R.sup.2 is carboxy(lower)alkyl, protected carboxy(lower)alkyl, carboxy(lower)alkenyl, protected carboxy(lower)alkenyl, or lower unsaturated aliphatic hydrocarbon, R.sup.3 is hydrogen, halogen, methyl, lower alkoxy, lower alkylthiomethyl, lower alkanoyloxymethyl or a heterocyclicthiomethyl which may have suitable substituents(s), R.sup.4 is carboxy or protected carboxy, R.sup.5 is hydrogen or lower alkyl, and X is halogen, provided that when R.sup.3 is lower alkanoyloxymethyl, then R.sup.2 is lower unsaturated aliphatic hydrocarbon, and pharmaceutically acceptable salts thereof.
本发明涉及具有高抗菌活性的新型7-酰氨基头孢菌素酸衍生物及其药学上可接受的盐,所述新型衍生物具有如下通式:##STR1## 其中R1为氨基或保护的氨基,R2为羧基(低级)烷基、保护的羧基(低级)烷基、羧基(低级)烯基、保护的羧基(低级)烯基或低级不饱和脂族烃,R3为氢、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可具有适当取代基的杂环硫甲基,R4为羧基或保护的羧基,R5为氢或低级烷基,X为卤素,条件是当R3为低级烷酰氧基甲基时,则R2为低级不饱和脂族烃,及其药学上可接受的盐。