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.
A practical access to 1,2-dicarbonyls via oxidation of alkynes catalyzed by gold(I) immobilized on MCM-41
作者:Jiajun Zeng、Jianying Li、Bin Huang、Jiajia Li、Mingzhong Cai
DOI:10.1016/j.jorganchem.2022.122435
日期:2022.10
gold(I)-catalyzed oxidation of alkynes was achieved by using 2,3-dichloropyridine N-oxide as oxidant and MCM-41-anchored diphenylphosphine-gold(I) complex [MCM-41-Ph2P-AuNTf2] as the catalyst under mild and acid-free conditions, yielding diverse 1,2-dicarbonyls in good to excellent yields with easy recycling of the gold catalyst. The developed method is applicable to a wide variety of alkynes including internal