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。
Catalyst-free and selective trifluoromethylative cyclization of acryloanilides using PhICF<sub>3</sub>Cl
作者:Jia Guo、Cong Xu、Ling Wang、Wanqiao Huang、Mang Wang
DOI:10.1039/c9ob00601j
日期:——
Trifluoromethylation-triggered cyclization of alkenes provides a useful route to CF3-containing cyclic compounds. Current approaches to generate CF3-based initiators from a CF3 source require a catalyst or an activator. This work describes a catalyst-free protocol to innately produce electrophilic CF3 species from PhICF3Cl for trifluoromethylative cyclization of acryloanilides. A new domino biscyclization of dienes
Visible-Light-Induced Trifluoromethylation of<i>N</i>-Aryl Acrylamides: A Convenient and Effective Method To Synthesize CF<sub>3</sub>-Containing Oxindoles Bearing a Quaternary Carbon Center
Trifluoromethylation/arylation: N‐aryl acrylamides undergo visible‐light‐induced tandem trifluoromethylation/arylation in the presence of a ruthenium photocatalyst with Togni's reagent as the CF3 source (see scheme). This reaction serves as a powerful and ecofriendly synthetic method for the preparation of a variety of CF3‐containing oxindolesbearing a quaternarycarboncenter.
Copper-catalyzed trifluoromethylation of N-arylacrylamides “on water” at room temperature
作者:Fang Yang、Piyatida Klumphu、Yong-Min Liang、Bruce H. Lipshutz
DOI:10.1039/c3cc48131j
日期:——
A copper-catalyzed intramolecular trifluoromethylation of arylacrylamides leads to oxindole derivatives, effected with stable and inexpensive Langlois' reagent (CF3SO2Na). These reactions proceed via a radical process in water at room temperature. The aqueous solution can be recycled.
Palladium-Catalyzed Oxidative Aryltrifluoromethylation of Activated Alkenes at Room Temperature
作者:Xin Mu、Tao Wu、Hao-yang Wang、Yin-long Guo、Guosheng Liu
DOI:10.1021/ja210614y
日期:2012.1.18
A palladium-catalyzed intramolecular oxidative aryltrifluoromethylation reaction of activated alkenes has been explored. The reaction allows for an efficient synthesis of a variety of CF(3)-containing oxindoles. Preliminary mechanistic study indicated that the reaction involves a C(sp(3))-Pd(IV)(CF(3)) intermediate, which undergoes reductive elimination to afford a C(sp(3))-CF(3) bond.