Syntheses of <i>N</i>-Alkyl 2-Arylindoles from Saturated Ketones and 2-Arylethynylanilines via Cu-Catalyzed Sequential Dehydrogenation/Aza-Michael Addition/Annulation Cascade
作者:Fei Ling、Dingguo Song、Linlin Chen、Tao Liu、Mengyao Yu、Yan Ma、Lian Xiao、Min Xu、Weihui Zhong
DOI:10.1021/acs.joc.9b03091
日期:2020.3.6
We describe here a Cu-catalyzed and 4-OH-TEMPO-mediated sequential dehydrogenation/aza-Michael addition/annulation cascade reaction for the construction of N-alkyl 2-arylindoles from facilely available saturated ketones and 2-arylethynylanilines. This reaction shows high regioselectivity and tolerates a variety of functional groups. Moreover, 3-alkyl-substituted indoles can also be achieved when using
我们在这里描述了从容易获得的饱和酮和2-芳基乙炔基苯胺中构建N-烷基2-芳基吲哚的Cu催化和4-OH-TEMPO介导的顺序脱氢/氮杂-Michael加成/环化级联反应。该反应显示出高的区域选择性,并能耐受多种官能团。此外,当使用2-烷基乙炔基苯胺作为起始原料时,也可以得到3-烷基取代的吲哚。