作者:Hongwei Zhou、Yanpeng Xing、Le Liu、Junjie Hong
DOI:10.1002/adsc.201100502
日期:2011.11
A facile and efficient synthesis of medium rings via a bicyclic sulfonium ion was developed. Spectroscopic evidence for the formation of an intermediate sulfonium moiety is provided. The sulfur atom served as a “bridge” to access the medium ring system and could be removed after use via a Ramberg–Bäcklund process. As a result of the readily available starting materials, simple operation, and mild conditions
开发了一种通过双环sulf离子轻松高效地合成中环的方法。提供了形成中间体sulf部分的光谱学证据。硫原子充当进入中环系统的“桥梁”,使用后可以通过Ramberg–Bäcklund工艺除去。由于容易获得的起始原料,简单的操作和温和的条件,这些反应应成为有机合成中引人注目的策略。