申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04077965A1
公开(公告)日:1978-03-07
Compounds of the formula ##STR1## and its salts, wherein A is lower alkylene, and R is optionally acyl or lower alkoxy carbonyl substituted amino or optionally acyl substituted hydroxy. The compounds are useful as intermediates in making cephalosporin derivatives.
式##STR1##及其盐的化合物,其中A是较低的烷基,R是可选的酰基或较低的烷氧羰基取代的氨基或可选的酰基取代的羟基。这些化合物在制备头孢菌素衍生物中作为中间体是有用的。