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.
一种改进的制备3'-溴-去乙酰头霉素磺酰氧化物化合物的方法,包括通过在惰性无水有机溶剂中对3'-未取代头霉素磺酰氧化物的4-羧基进行硅化保护,并原位溴化硅化合物,从而制备具有药用价值的头霉素酸化合物的3'-溴化合物作为中间体。