CAN-Catalyzed Regioselective Synthesis of Pyrido[2,3-c]carbazoles by the Povarov Reaction
作者:Rajagopal Nagarajan、Mayavan Viji
DOI:10.1055/s-0031-1289967
日期:2012.1
A simple route for the synthesis of 3-methyl-3H-pyrido[2,3-c]carbazoles via Povarov reaction of 3-aminocarbazoles, and ethyl vinyl ether is described. This transformation, catalyzed by cerium(IV) ammonium nitrate (CAN) under mild reaction conditions, provides the pyrido[2,3-c]carbazoles in good yields with high regioselectivity. Povarov reaction - annulations - heterocycles - Lewis acids - regioselectivity
描述了一种通过3-氨基咔唑与乙基乙烯基醚的Povarov反应合成3-甲基-3 H-吡啶并[2,3- c ]咔唑的简单方法。在温和的反应条件下,硝酸铈(IV)铵(CAN)催化的这种转化以高收率和高区域选择性提供了吡啶并[2,3- c ]咔唑。 Povarov反应-环空-杂环-路易斯酸-区域选择性
Rhodium-Catalyzed C–H Annulation of Free Anilines with Vinylene Carbonate as a Bifunctional Synthon
作者:Jiang Nan、Jiacheng Yin、Xue Gong、Yan Hu、Yangmin Ma
DOI:10.1021/acs.orglett.1c03404
日期:2021.11.19
Chemical transformation with vinylenecarbonate as an emerging synthetic unit has recently attracted considerable attention. This report is a novel conversion pattern with vinylenecarbonate, in which such a vibrant reagent unprecedentedly acts as a difunctional coupling partner to complete the C–H annulation of free anilines. From commercially available substrates, this protocol leads to the rapid