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.
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.
Metal-Free Direct Intramolecular Carbotrifluoromethylation of Alkenes to Functionalized Trifluoromethyl Azaheterocycles
作者:Lei Li、Min Deng、Sheng-Cai Zheng、Ya-Ping Xiong、Bin Tan、Xin-Yuan Liu
DOI:10.1021/ol403391v
日期:2014.1.17
The first example of a metal-free direct carbotrifluoromethylation of alkenes using inexpensive TMSCF3 as the CF3 source is described. The methodology not only exhibits high chemoselectivity for this transformation but also expands the substrate scope that is difficult to access by known transition-metal-catalyzed methods.
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。