Palladium-Catalyzed Synthesis of 2,3-Diaryl-<i>N</i>-methylindoles from <i>ortho</i>-Alkynylanilines and Aryl Pinacol Boronic Esters
作者:Yue-Gui Luo、R. Sidick Basha、Daggula Mallikarjuna Reddy、Yong-Jing Xue、Te-Hsuan Chen、Chin-Fa Lee
DOI:10.1021/acs.orglett.8b02835
日期:2018.11.2
A palladium-catalyzed synthesis of 2,3-diaryl-N-methylindoles from o-alkynylanilines and aryl pinacol boronic esters was developed. The system possesses high functional group tolerance and a broad substrate scope with a variety of aryl pinacol boronic esters to provide valuable 2,3-diaryl-N-methylindoles in moderate to good yields. Remarkably, the sequential reaction controlled by iridium-catalyzed
开发了钯催化的由邻炔基苯胺和芳基频哪醇硼酸酯合成的2,3-二芳基-N-甲基吲哚。该系统具有高官能团耐受性和广泛的底物范围,并带有各种芳基频哪醇硼酸酯,以中等至良好的产率提供有价值的2,3-二芳基-N-甲基吲哚。值得注意的是,由铱催化的C–H硼酸酯化或钯催化的炔基化反应,然后进行本钯催化的C3芳基化反应所控制的顺序反应提供了高收率的官能化2,3-二芳基-N-甲基吲哚。