The base-induced formal [4+3] annulation reaction of in situ-formed aza-o-quinone methides and pyridinium 1,4-zwitterionic thiolates is reported. This protocol provides a novel and reliable method for the synthesis of biologically interesting benzo[e][1,4]thiazepine derivatives in synthetically useful yields. In addition, postsynthetic modification results in the formation of its sulfoxide and sulfone
报道了原位形成的
氮杂-邻-醌
甲基化物和
吡啶鎓1,4-两性离子
硫醇盐的碱诱导形式[4+3]环化反应。该协议提供了一种新颖且可靠的方法,用于以合成有用的产量合成具有
生物学意义的
苯并[ e ][1,4]
硫氮杂衍
生物。此外,合成后修饰导致其
亚砜和砜衍
生物的形成。