Phosphine‐Catalyzed Activation of Vinylcyclopropanes: Rearrangement of Vinylcyclopropylketones to Cycloheptenones
作者:Jun Wu、Yuhai Tang、Wen Wei、Yong Wu、Yang Li、Junjie Zhang、Yuansuo Zheng、Silong Xu
DOI:10.1002/anie.201800555
日期:2018.5.22
We report a phosphine‐catalyzed activation of electron‐deficient vinylcyclopropanes (VCPs) to generate an ambident C5 synthon that is poised to undergo consecutive reactions. The utility of the activation is demonstrated in a phosphine‐catalyzed rearrangement of vinylcyclopropylketones to cycloheptenones in good yields with a broad substrate scope. Mechanistic investigations support a stepwise process
我们报告了磷缺乏电子的乙烯基环丙烷(VCP)的膦催化活化,以生成环境温和的C 5合子,准备进行连续反应。该活化的效用在膦催化的乙烯基环丙基酮重排成环庚烯的过程中得到了证明,具有良好的收率,具有广泛的底物范围。机械调查支持一个循序渐进的过程,其包括同合物另外,水辅助质子转移,和7-内切-trig小号Ñ 2'环闭合。