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。
Concise synthesis of oxindole derivatives bearing a 3-trifluoroethyl group: Copper-catalyzed trifluoromethylation of acryloanilides
作者:Hiromichi Egami、Ryo Shimizu、Mikiko Sodeoka
DOI:10.1016/j.jfluchem.2013.03.009
日期:2013.8
Carbotrifluoromethylation of acryloanilide derivatives with the combination of CuI and Togni's reagent affords oxindolederivatives bearing a 3-trifluoroethyl group in high yields under mild conditions that are compatible with various functional groups.
Metal-Free Direct Trifluoromethylation of Activated Alkenes with Langlois’ Reagent Leading to CF<sub>3</sub>-Containing Oxindoles
作者:Wei Wei、Jiangwei Wen、Daoshan Yang、Xiaoxia Liu、Mengyuan Guo、Ruimei Dong、Hua Wang
DOI:10.1021/jo500515x
日期:2014.5.2
A metal-free and cost-effective synthesis protocol has been initially proposed for the construction of CF3-containing oxindoles via the direct oxidative trifluoromethylation of activated alkenes with Langlois’ reagent (CF3SO2Na). The present methodology, which utilizes very cheap CF3 reagent and a simple oxidant, provides a convenient and practical approach to CF3-containing oxindoles with a wide variety
最初已经提出了一种无金属且具有成本效益的合成方案,用于通过用Langlois试剂(CF 3 SO 2 Na)对活化的烯烃进行直接氧化三氟甲基化来构建含CF 3的羟吲哚。本方法利用非常便宜的CF 3试剂和简单的氧化剂,为含有CF 3的具有多种官能团的羟吲哚提供了方便实用的方法。
Photocatalyst and additive-free visible light induced trifluoromethylation–arylation of<i>N</i>-arylacrylamides with Umemoto's reagent
A visible light induced highly convenient and practical method for the trifluoromethyl–arylation ofN-arylmethacrylamides has been developed using Umemoto*s reagent as the trifluoromethyl source.
The catalyst-free electrochemical di- and trifluoromethylation/cyclization of N-substituted acrylamides was realized under external oxidant-free conditions. The strategy provides expedient access to fluoroalkylated oxindoles and 3,4-dihydroquinolin-2(1H)-ones with ample scope and broad functional group tolerance by mild, direct electrolysis of sodium sulfinates in an undivided cell. Detailed mechanistic