Process for preparing 7.beta.-acylamino-7.alpha.-alkoxycephalosporins
申请人:Sankyo Company Limited
公开号:US04017488A1
公开(公告)日:1977-04-12
A 7.beta.-acylamino-7.alpha.-alkoxycephalosporin is prepared by reacting a 7-acylaminocephalosporin with a halogenating agent to give an iminohalide, reacting the latter compound with a base to give a keteneimine, reacting the latter compound with a halogen to give an .alpha.-halogeno iminohalide, reacting the latter compound with an alkali metal alkoxide and consecutively either subjecting the resulting compound to hydrolysis, or reacting the resulting compound with an acid or a halogenosilyl compound followed by treating the resulting compound with water. The 7.beta.-acylamino-7.alpha.-alkoxycephalosporin is useful as an antibacterial agent.