Synthesis of unsymmetrical benzils <i>via</i> palladium-catalysed α-arylation–oxidation of 2-hydroxyacetophenones with aryl bromides
作者:Takanori Matsuda、Souta Oyama
DOI:10.1039/d0ob00575d
日期:——
cross-coupling reaction between 2-hydroxyacetophenones and aryl bromides in the presence of a palladium catalyst. Experimental studies suggested a reaction mechanism involving a one-pot tandem palladium-catalysed α-arylation and oxidation, where aryl bromides play a dual role as mild oxidants as well as arylating agents.
Pd/Cu-catalyzed oxidation of alkynes into 1,2-diketones using DMSO as the oxidant
作者:Ang Gao、Fan Yang、Ji Li、Yangjie Wu
DOI:10.1016/j.tet.2012.04.069
日期:2012.6
A facile and practical method for the palladium/copper-catalyzed transformation of internal alkynes into 1,2-diketones has been described, affording the desired products in moderate to excellent yields. The mechanistic studies were also preliminarily pursued using diphenyl sulfoxide as the oxidant, and the diphenyl sulfide was isolated as the reduced product. (C) 2012 Elsevier Ltd. All rights reserved.