Highly Regioselective C–H Alkylation of Alkenes Through an Aryl to Vinyl 1,4-Palladium Migration/C–C Cleavage Cascade
作者:Quannan Wang、Rongjun Chen、Jiang Lou、Dong H. Zhang、Yong-Gui Zhou、Zhengkun Yu
DOI:10.1021/acscatal.9b04161
日期:2019.12.6
4-palladium migration/ring-opening C–C cleavage cascade, giving trisubstituted alkenes in high yields. The protocol features good regioselectivity, high yields, broad substrate scopes, and good functional group tolerance. The mechanistic studies implicate that the cross-coupling reaction occurs via oxidative addition, 1,4-palladium migration, ring-opening C–C cleavage, and reductive elimination. DFT calculations
以芳基到乙烯基的1,4-钯迁移/开环CC裂解级联反应,以环丁醇为偶联伙伴,已有效地实现了钯-催化的宝石双取代乙烯的CH烷基化,从而获得了高收率的三取代烯烃。该方案具有良好的区域选择性,高收率,广泛的底物范围和良好的官能团耐受性。机理研究表明,交叉偶联反应是通过氧化加成,1,4-钯迁移,开环CC裂解和还原消除而发生的。DFT计算表明,该协议的高效率归因于在热力学上受2-氟苯酚辅助的1,4-钯迁移。