申请人:Biochemie Gesellschaft m.b.h.
公开号:US05585485A1
公开(公告)日:1996-12-17
A cephalosporin intermediate of the formula ##STR1## where R.sub.3 is carboxyl, carboxylate, or a carboxylic acid ester group and, R.sub.8 and R.sub.9 are each independently hydrogen, halogen, (C.sub.1-4) alkyl, hydroxy, carboxamido, (C.sub.1-4) alkoxycarbonyl, amino, mono- (C.sub.1-4) alkylamino, di- (C.sub.1-4) alkylamino, or together are a 5 or 6-membered carbocyclic ring or an alkali metal, alkaline earth metal, or acid addition salt thereof. Valuable cephalosporin antibiotics can be produced from the cephalosporin intermediate products of formula I.
一种头孢菌素的中间体,其化学式为##STR1##其中R.sub.3是羧基,羧酸盐或羧酸酯基,而R.sub.8和R.sub.9各自独立地为氢,卤素,(C.sub.1-4)烷基,羟基,羧酰胺,(C.sub.1-4)烷氧羰基,氨基,单(C.sub.1-4)烷基氨基,双(C.sub.1-4)烷基氨基,或者一起是5或6成员的碳环或其碱金属,碱土金属或酸加成盐。从公式I的头孢菌素中间体产品中可以生产有价值的头孢菌素抗生素。