Process for the preparation of 3'-bromosubstituted deacetoxycephalosporanic acid sulphoxide derivatives
申请人:GIST-BROCADES N.V.
公开号:EP0034394A2
公开(公告)日:1981-08-26
3'-Bromo-substituted deacetoxycephalosporanic acid sulphoxide derivatives are prepared by silylating the carboxy group (in order to protect same) of a 3'-unsubstituted deacetoxycephalosporanic acid sulphoxide derivative in an inert anhydrous organic solvent, and then brominating the resulting silyl ester of the deacetoxycephalosporanic acid sulphoxide in situ.