Cephalosporin antibiotics having a 3-position substituent of the formula: --CH.sub.2 NR.sup.1 --Y--A--Z--Q are described, wherein R.sup.1 is hydrogen or certain optionally substituted alkyl groups; Y is --CO-- or --SO.sub.2 --; A is optionally substituted phenylene or heterocyclylene; Z is a linking group and Q is a catechol or related ring system. Processes for their preparation and use are described.
本文描述了具有式子--CH.sub.2 NR.sup.1 --Y--A--Z--Q的3-位取代基的
头孢菌素类抗生素,其中R.sup.1是氢或某些可选取代烷基基团;Y是--CO--或--SO.sub.2 --;A是可选取代的苯基或杂环基;Z是连接基团,Q是
儿茶酚或相关环系统。同时还描述了它们的制备和使用方法。