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
Metal-Free Trifluoromethylation and Arylation of Alkenes: Domino Synthesis of Oxindole Derivatives
作者:Liangliang Shi、Xiaobo Yang、Yuyuan Wang、Haijun Yang、Hua Fu
DOI:10.1002/adsc.201300995
日期:2014.3.24
N‐alkyl‐N‐phenylacrylamides as the starting materials, inexpensive and easily stored Langlois reagent (sodiumtrifluoromethanesulfinate) as the trifluoromethyl source, and iodobenzene diacetate [PhI(OAc)2] as the oxidant. The procedure involves a metal‐free domino trifluoromethylation and arylation of alkenes. The methods did not need mediation of any transition metal which avoided contaminations of toxic
l hydrazides as trifluoromethylating agents has been demonstrated in two vicinal difunctionalization reactions of terminal alkenes: the copper-catalyzed three-component vicinal chlorotrifluoromethylation of arylakenes with TfNHNHBoc and NaCl and the tandem trifluoromethylation/cyclization of N-arylacrylamides with TfNHNHBoc. The reactions proceeded in the presence of inexpensive oxidants under mild
A Metal-Free Route to CF<sub>3</sub>-Containing Oxindoles by PhI(OAc)<sub>2</sub>-Mediated Trifluoromethylation of<i>N</i>-Arylacrylamides with TMSCF<sub>3</sub>
作者:Weijun Fu、Fengjuan Xu、Yuqin Fu、Chen Xu、Shihui Li、Dapeng Zou
DOI:10.1002/ejoc.201301512
日期:2014.2
A mild and efficient PhI(OAc)2-mediatedtrifluoromethylation reaction of N-arylacrylamides with TMSCF3 under metal-free conditions was developed. This method provides convenient access to a variety of useful CF3-containing oxindoles in moderate to good yields.