Palladium-Catalyzed Dearomative Heck/Suzuki Coupling of C2-Deuterated or C2-Nonsubstituted Indoles
作者:Wei-Yang Gao、Gao-Yang Yu、Yan-Yu Li、Ren-Xiao Liang、Xin Hong、Yi-Xia Jia
DOI:10.1021/acs.orglett.4c00166
日期:2024.3.29
A palladium-catalyzed dearomative diarylation of C2-deuterated or C2-nonsubstituted indoles through domino Heck/Suzuki coupling is established. Relying on electron-deficient phosphite ligand, side reactions including intermolecular Suzuki coupling and intramolecular C–D/H arylation are inhibited and a wide range of 2,3-diarylated indolines bearing vicinal tertiary stereocenters including deuterated
建立了通过多米诺赫克/铃木偶联进行的钯催化的 C2-氘代或 C2-未取代吲哚的脱芳香二芳基化反应。依靠缺电子亚磷酸酯配体,包括分子间 Suzuki 偶联和分子内 C-D/H 芳基化在内的副反应受到抑制,并且以中等至优异的产率提供了各种带有邻位三级立体中心(包括氘代立体中心)的 2,3-二芳基化二氢吲哚(高达 94%)和出色的非对映选择性(>20:1)。在高温下催化剂负载量可降低至 0.02 mol%。