(CAAC)Copper Catalysis Enables Regioselective Three-Component Carboboration of Terminal Alkynes
作者:Yang Gao、Nana Kim、Skyler D. Mendoza、Sima Yazdani、Andre Faria Vieira、Mingyu Liu、Aaron Kendrick、Douglas B. Grotjahn、Guy Bertrand、Rodolphe Jazzar、Keary M. Engle
DOI:10.1021/acscatal.2c00614
日期:2022.6.17
Cyclic(alkyl)(amino)carbene (CAAC) ligands are found to perturb regioselectivity of the copper-catalyzed carboboration of terminal alkynes, favoring the less commonly observed internal alkenylboron regiosomer through an α-selective borylcupration step. A variety of carbon electrophiles participate in the reaction, including allyl alcohol derivatives and alkyl halides. The method provides a straightforward
环(烷基)(氨基)卡宾 (CAAC) 配体被发现会扰乱末端炔烃的铜催化碳硼化的区域选择性,通过 α-选择性硼基铜化步骤有利于不太常见的内部烯基硼区域异构体。多种碳亲电子试剂参与反应,包括烯丙醇衍生物和卤代烷。该方法为通用的三取代烯基硼化合物提供了一种直接且选择性的途径,否则很难获得这些化合物。