作者:Tingting Yan、Kaki Raveendra Babu、Yong Wu、Yang Li、Yuhai Tang、Silong Xu
DOI:10.1021/acs.orglett.1c01214
日期:2021.6.18
A phosphine-catalyzed olefinic cross-coupling between benzyl halides and fumarates is described, which affords trisubstituted alkenes in good yields and excellent E-selectivity under metal-free conditions. Mechanistic studies suggest a catalytic cycle involving phosphorus ylide formation, Michael addition, water-assisted hydrogen transfer, and phosphine elimination.
描述了苄基卤化物和富马酸酯之间的膦催化的烯烃交叉偶联,其在无金属条件下以良好的产率和优异的E选择性提供三取代的烯烃。机理研究表明催化循环涉及磷叶立德形成、迈克尔加成、水辅助氢转移和膦消除。