申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04477447A1
公开(公告)日:1984-10-16
This invention relates to novel 7-acylaminocephalosporanic acid derivatives of high antimicrobial activity, to processes for their preparation, and to pharmaceutical compositions comprising said derivatives, said derivatives being of the formula: ##STR1## wherein R.sup.1 is amino or protected amino, R.sup.2 is dialkanoyloxy(lower)alkyl; alkyl having one or more substituents selected from the group consisting of hydroxy, protected hydroxy, alkoxy, carboxy, protected carboxy, cycloalkylcarbonyloxy and heterocyclic group; lower alkoxycarbonyloxy(lower)alkyl; azido(lower)alkoxycarbonyloxy(lower)alkyl; aroyloxy(lower)alkyl; higher alkanoyloxy(lower)alkyl; phthalidyl; or phthalidylidene(lower)alkyl, R.sup.3 is lower alkyl, Y is thio (--S--) or sulfinyl (--S--), and the dotted line represents 2- or 3-cephem nuclei.
这项发明涉及具有高抗微生物活性的新型7-酰氨基头孢菌素酸衍生物,以及其制备方法和包含所述衍生物的药物组合物,所述衍生物的化学结构如下:
其中R.sup.1为氨基或保护氨基,R.sup.2为二烷酰氧(较低)烷基;具有一个或多个亲水基、保护亲水基、烷氧基、羧基、保护羧基、环烷基羰氧基和杂环基等取代基的烷基;烷氧羰氧(较低)烷基;偶氮(较低)烷氧羰氧(较低)烷基;芳酰氧(较低)烷基;较高脂酰氧(较低)烷基;邻苯二甲酰基;或邻苯二甲酰亚基(较低)烷基,R.sup.3为较低烷基,Y为硫代基(--S--)或亚砜基(--S--),虚线代表2-或3-头孢菌素核。