A new synthetic method of 3-formylcephalosporins.
作者:TOHRU SUGAWARA、HIROTOMO MASUYA、YASUHIKO KAWANO、TAISUKE MATSUO、YUTAKA KUWADA
DOI:10.1248/cpb.28.1339
日期:——
Cephalosporin 3'-bromolactones (3) were prepared in good yields via silyl ethers (2) starting from readily available cephalosporin lactones (1). Treatment of 3 with dimethyl sulfoxide yielded 3-formylcephalosporins (4), a useful intermediate for the chemical modification at the C3-position of cephalosporins.
从现成的头孢菌素内酯(1)开始,通过硅基醚(2)制备头孢菌素 3'-溴内酯(3),产量很高。用二甲亚砜处理 3 后可得到 3-甲酰基头孢菌素(4),这是一种对头孢菌素 C3 位进行化学修饰的有用中间体。