Direct Synthesis of 3-Acylindoles through Rhodium(III)-Catalyzed Annulation of<i>N</i>-Phenylamidines with α-Cl Ketones
作者:Jianhui Zhou、Jian Li、Yazhou Li、Chenglin Wu、Guoxue He、Qiaolan Yang、Yu Zhou、Hong Liu
DOI:10.1021/acs.orglett.8b03383
日期:2018.12.7
versatile 3-acylindoles through Rh(III)-catalyzed C–H activation and annulation cascade of N-phenylamidines with α-Cl ketones was developed, in which α-Cl ketones serve as unusual one-carbon (sp3) synthons. This strategy features high regioselectivity, efficiency, wide substrate tolerance, and mild reaction conditions, which further underscore its synthetic utility in drug molecule synthesis.
Practical method for synthesis of 2,3-disubstituted indole derivatives promoted by β-(benzotriazol-1-yl)allylic O-stannyl ketyl radicals
作者:Taehoon Kim、Kyongtae Kim
DOI:10.1016/j.tetlet.2009.12.030
日期:2010.2
Treatment of beta-aryl-beta-(benzotriazol-1-yl)-alpha-primary alkyl (or aryl)-alpha,beta-unsaturated ketones 1 with n-Bu3SnH (4 equiv) in a catalytic amount of AlBN in PhH at reflux afforded 3-alkyl (or aryl)-2-arylindoles 8 in good yields. However, when tert-butyl group is bonded at alpha-position, 3-acyl (or aroyl)-2-arylindoles 9 were obtained as major products along with phenanthridines 5 as minor products. (C) 2009 Elsevier Ltd. All rights reserved.