Ligand-Enabled Copper-Catalyzed Regio- and Stereoselective Allylboration of 1-Trifluoromethylalkenes
作者:Yuki Kojima、Yuji Nishii、Koji Hirano
DOI:10.1021/acs.orglett.2c03024
日期:2022.10.14
A copper-catalyzed regio- and stereoselective allylboration of 1-trifluoromethylalkenes with bis(pinacolato)diboron (pinB–Bpin) and allylic chlorides has been developed to form functionalized trifluoromethylated products with high diastereoselectivity. The key to success is the judicious choice of Cs2CO3 base and t-Bu-modified dppe-type ligand, which enables the otherwise challenging high catalyst
铜催化的 1-三氟甲基烯烃与双(频哪醇)二硼(pinB-Bpin)和烯丙基氯的区域选择性和立体选择性烯丙基硼化反应已被开发出来,可形成具有高非对映选择性的功能化三氟甲基化产物。成功的关键是明智地选择 Cs 2 CO 3碱基和t -Bu 改性的 dppe 型配体,这使得本来具有挑战性的高催化剂周转率和抑制来自烷基铜中间体的竞争性脱氟副反应成为可能。所得 Bpin 部分的产物衍生化可以提供多种具有高立体化学保真度的含CF 3分子。