The present invention provides thiazolylacetic acid derivatives of the formula:
wherein R1NH- is amino or a protected amino group, R2 is hydrogen or lower alkyl, -COOR3 is carboxy or a protected carboxy group and n is an integer of 2 or 3, and processes for preparing the same. Said compound (I) is useful as an intermediate in the synthesis of cephalosporins.
本发明提供了式中 R1NH- 为
氨基或受保护的
氨基,R2 为氢或低级烷基,-COOR3 为羧基或受保护的羧基,n 为 2 或 3 的整数的
噻唑乙酸衍
生物及其制备方法。 上述化合物 (I) 可用作合成
头孢菌素的中间体。