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。