The microwave-assisted Dötz benzannulation process
作者:Edward J. Hutchinson、William J. Kerr、Euan J. Magennis
DOI:10.1039/b206981b
日期:——
Chromium carbene-mediated Dötz benzannulation has been shown to proceed remarkably rapidly and with enhanced efficiency under developed microwave-assisted conditions.
CuI/Cu(OTf)2/DMSO system-catalyzed intramolecular oxidative cyclization of (o-alkynyl)arylketones: Efficient synthesis of 1,4-naphthoquinones
作者:Bingwei Zhou、Qian Liu、Heng Wang、Hongwei Jin、Yunkui Liu
DOI:10.1016/j.tet.2019.05.066
日期:2019.7
A concise and efficient method for the synthesis of 1,4-naphthoquinones has been successfully developed involving a CuI/Cu(OTf)(2)/DMSO system-catalyzed intramolecular oxidative cyclization of (o-alkynyl) arylketones. The present protocol provided a novel approach to access functionalized 1,4-naphthoquinones from non-naphthoquinone precursors with good selectivity and functional group tolerance. (C) 2019 Published by Elsevier Ltd.