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
描述了空前的Ga(OTf)3催化的2-取代的吲哚与三氟甲基化的3-吲哚基甲醇的温度控制的区域发散性烷基化反应,提供了结构上不对称的3,3'-和3,6'-双(吲哚基)甲烷在温和条件下,含CF 3的季碳中心收率好至极好。此外,本协议可以成功地扩展到二氟甲基化的3,3'-和3,6'-双(吲哚基)甲烷的合成,具有出色的效率。