Process for the preparation of cefditoren using the thioester of thiazolylacetic acid
申请人:——
公开号:US20030225265A1
公开(公告)日:2003-12-04
The present invention provides a process for the preparation of Cefditoren of formula (I)
1
which comprises acylating 7-amino-cephem carboxylic acids of the general formula (IV), where R
3
is hydrogen or trimethylsilyl with thioester derivatives of the formula (II), where R
1
represents C
1
-C
4
alkyl or phenyl in an organic solvent in the presence of an organic base at a temperature in the range of −10 ° C. to 30 ° C.
本发明提供了一种制备式Cefditoren(I)的过程,该过程包括在有机溶剂中,在有机碱的存在下,将一般式(IV)的7-氨基-头孢菌素羧酸(其中R3为氢或三甲基硅基)与一般式(II)的硫酯衍生物(其中R1代表C1-C4烷基或苯基)酰化,温度范围为-10°C至30°C。