发明申请
US20050119244A1 Process for preparing cephalosporins with salified intermediate 审中-公开
用盐化中间体制备头孢菌素的方法

Process for preparing cephalosporins with salified intermediate
摘要:
Cephalosporins may be conveniently prepared by a process in which 7-ACA is silylated, acylated, desilylated and then salified to give an intermediate which is eventually cyclized with thiourea.
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