Heck-Type Cross-Dehydrogenative Coupling Reactions of Indolizines at the 3-Position with Electron-Deficient Alkenes through Palladium-Catalyzed CH Activation
作者:Huayou Hu、Yun Liu、Hao Zhong、Yulan Zhu、Chao Wang、Min Ji
DOI:10.1002/asia.201101050
日期:2012.5
A cross‐dehydrogenative coupling reaction of indolizines with electron‐deficient alkenes for the synthesis of 3‐alkenyl‐substituted indolizines has been reported. The reaction takes place at the 3‐position selectively through palladium‐catalyzed CH activation, following a Heck‐type cross‐coupling reaction under mild and ligand‐free conditions. Furthermore, the reaction mechanism of the PdII/Pd0 catalytic
据报道,吲哚嗪与缺乏电子的烯烃发生交叉脱氢偶联反应,可合成3-烯基取代的吲哚嗪。在温和且无配体的条件下发生Heck型交叉偶联反应后,该反应通过钯催化的CH活化选择性地在3位发生。此外,还通过1 H NMR光谱证实了Pd II / Pd 0催化途径的反应机理。