Synthesis of Oxindoles through Silver-Catalyzed Trifluoromethylation-, Difluoromethylation- and Arylsulfonylation-Cyclization Reaction of<i>N</i>-Arylacrylamides
作者:Jidan Liu、Shaobo Zhuang、Qingwen Gui、Xiang Chen、Zhiyong Yang、Ze Tan
DOI:10.1002/ejoc.201400087
日期:2014.5
Efficient synthesis of trifluoromethyl and difluoromethyl-substituted oxindoles was achieved by reacting Langlois reagent or Baran reagent with N-arylacrylamides. However, the reaction of aryl sulfinic acid sodium salts with N-arylacrylamides did not give the desulfinative products, instead, aryl sulfonated products were produced.
通过 Langlois 试剂或 Baran 试剂与 N-芳基丙烯酰胺反应,实现了三氟甲基和二氟甲基取代的羟吲哚的有效合成。然而,芳基亚磺酸钠盐与N-芳基丙烯酰胺的反应没有得到脱亚磺化产物,而是产生了芳基磺化产物。
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.
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.
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