Starting from cephalosporin thiolactones (1), a sequence of reactions (bromination, hydrolysis, oxidation and opening of the dioxo thiophene ring) yielded 3-carboxyceph-3-ems (10). Several reactions of thiolactone derivatives are also described.
从
头孢菌素硫内酯(1)开始,通过一系列反应(
溴化、
水解、氧化和打开二氧代
噻吩环),得到了 3-羧基ceph-3-ems(10)。此外,还介绍了
硫内酯衍
生物的几种反应。