A perfect double role of CF3 groups in activating substrates and stabilizing adducts: the chiral Brønsted acid-catalyzed direct arylation of trifluoromethyl ketones
作者:Jing Nie、Guang-Wu Zhang、Lian Wang、Aiping Fu、Yan Zheng、Jun-An Ma
DOI:10.1039/b900474b
日期:——
A direct and efficient Brønsted acid-promoted arylation of tri- and difluoromethyl ketones, as well perfluoroalkyl ketones, has been developed; good to excellent enantioselectivities (up to 99% ee) were achieved.
Ga(OTf)<sub>3</sub>-Catalyzed Temperature-Controlled Regioselective Friedel–Crafts Alkylation of Trifluoromethylated 3-Indolylmethanols with 2-Substituted Indoles: Divergent Synthesis of Trifluoromethylated Unsymmetrical 3,3′-and 3,6′-Bis(indolyl)methanes
作者:Yuan Ling、Di An、Yuanyuan Zhou、Weidong Rao
DOI:10.1021/acs.orglett.9b01135
日期:2019.5.3
temperature-controlled regiodivergent alkylation of 2-substituted indoles with trifluoromethylated 3-indolylmethanols is described that provides structurally diverse unsymmetrical 3,3′- and 3,6′-bis(indolyl)methanes with a CF3-containing quaternary carbon center in good to excellent yields under mild conditions. In addition, this present protocol could be successfully extended to the synthesis of difluoromethylated
AbstractA synthetic approach for the synthesis 2‐phosphoryl‐3‐monofluorovinylindoles via cascade regioselective dehydrative phosphorylation/stereoselective defluorination of difluoromethylated 3‐indolylmethanols and H‐phosphine oxides under catalyst‐ and additive‐free conditions is described. The reaction could be scaled‐up without the need for column chromatography purification.magnified image