Process for preparing 3'bromo-desacetoxycephalosporanic acid sulfoxide
申请人:Gist-Brocades N.V.
公开号:US04366315A1
公开(公告)日:1982-12-28
An improved process for the preparation of 3'-bromo-desacetoxycephalosphoranic acid sulfoxide compounds comprising protecting the 4-carboxy group of a 3'-unsubstituted cephalosporanic acid sulfoxide by silylating in an inert anhydrous organic solvent and brominating the silylated compound in situ which 3'-bromo compounds are valuable intermediates for the preparation of therapeutically useful cephalosporanic acid compounds.