N-Heterocyclic carbene catalyzed intramolecular nucleophilic addition of carbonyl anion equivalents to enol ethers
作者:Jinmei He、Shouchu Tang、Jian Liu、Yingpeng Su、Xinfu Pan、Xuegong She
DOI:10.1016/j.tet.2008.06.082
日期:2008.9
The intramolecular nucleophilic addition reaction of acyl anion equivalents to enol ethers is described, which was catalyzed by N-heterocyclic carbenes generated in situ from readily available thiazolium salt. In this transformation, benzofuranones were obtained in excellent yield. In combination with our previous work, the precise mechanistic elucidation for the formation of benzofuranones has been
描述了酰基阴离子当量与烯醇醚的分子内亲核加成反应,其是由从易得的噻唑鎓盐原位产生的N-杂环卡宾催化的。在该转化中,以优异的产率获得了苯并呋喃酮。结合我们以前的工作,对形成苯并呋喃酮的精确机理进行了进一步研究。标记实验暗示该转化通过亲核加成机理进行。