Enantioselective Construction of Quaternary All-Carbon Centers via Copper-Catalyzed Arylation of Tertiary Carbon-Centered Radicals
作者:Lianqian Wu、Fei Wang、Pinhong Chen、Guosheng Liu
DOI:10.1021/jacs.8b13052
日期:2019.2.6
An enantioselective copper-catalyzed arylation of tertiary carbon-centered radicals, leading to quaternary all-carbon stereocenters, has been developed herein. The tertiary carbon-centered radicals, including both benzylic and nonbenzylic radicals, were produced by the addition of trifluoromethyl radical to α-substituted acrylamides, and subsequently captured by chiral aryl copper(II) species to give
本文开发了一种对映选择性铜催化的叔碳中心基团芳基化,导致季全碳立体中心。叔碳中心自由基,包括苄基和非苄基自由基,是通过将三氟甲基自由基加成到 α-取代的丙烯酰胺中产生的,随后被手性芳基铜 (II) 物种捕获,以产生具有优异对映选择性的 C-Ar 键。重要的是,与叔碳自由基相邻的酰基酰胺基 (CONHAr) 基团对于不对称自由基偶联至关重要。该反应本身具有底物范围广、官能团相容性好、条件温和等特点。