Cephalosporin antibiotics having a 3-position substituent of the formula: ##STR1## are described, wherein X is --CO--, --SO.sub.2 -- or --COCH.sub.2 --; Y is --CO--, --SO.sub.2 -- or --CH.sub.2 --; Q is a benzene, pyridine or naphthalene ring, R.sup.1 and R.sup.2 are ortho with respect to each other and are independently hydroxy or of the formula O--M wherein M is a moiety and the O--M bond is cleavable in vivo and ring Q may be further substituted by a variety of atoms and groups. Processes for their preparation and use are described.
本文介绍了具有以下结构的3位取代基的
头孢菌素类抗生素:##STR1## 其中X为--CO--,--SO.sub.2--或--COCH.sub.2--;Y为--CO--,--SO.sub.2--或--CH.sub.2--;Q为苯环,
吡啶环或
萘环,R.sup.1和R.sup.2相对于彼此为邻位,且独立地为羟基或公式O--M中的O--M,其中M为一个基团,O--M键在体内可被断裂,环Q还可以进一步被各种原子和基团取代。本文还介绍了它们的制备和使用方法。