CuCl–K2CO3-catalyzed highly selective borylcupration of internal alkynes – ligand effect
作者:Weiming Yuan、Shengming Ma
DOI:10.1039/c2ob26147b
日期:——
An efficient and practical copper-catalyzed highly regio- and stereoselective borylcupration of internal alkynes with bis(pinacolato)diboron using a catalytic amount of K2CO3 as base producing Z-alkenylboron compounds has been demonstrated by applying the ligand effect: commercially available electron-rich tris(p-methoxyphenyl) phosphine ensures a smooth and efficient reaction. Functionalized alkynes
高效而实用的铜催化内部炔烃的高度区域和立体选择性的硼烷基富集 bis(pinacolato)diboron通过应用配体效应已证明使用催化量的K 2 CO 3作为碱生产Z-烯基硼化合物三(对甲氧基苯基)膦确保反应平稳有效。也可以以优异的选择性使用官能化的炔烃,例如炔丙醇和衍生物以及N-炔丙基甲苯磺酰胺。
Stereoselective Synthesis of Trisubstituted Alkenes by Nickel‐Catalyzed Benzylation and Alkene Isomerization
作者:Yunlong Zhao、Chen‐Fei Liu、Leroy Qi Hao Lin、Albert S. C. Chan、Ming Joo Koh
DOI:10.1002/anie.202202674
日期:2022.6.27
An NHC−NiI catalyst promotes regio- and stereoselective coupling of polarized terminal olefins with benzyl chlorides to afford trisubstituted borylalkenes and styrenes. The reaction proceeds through branched-selective Heck-type benzylation followed by trans-selective allyl isomerization.