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.
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。
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.
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.