A new and efficient method for palladium(II) catalytic desulfitative conjugate addition of arylsulfinic acids with α,β-unsaturated carbonyl compound has been developed. The key reacting intermediates including aryl Pd(II) sulfinic intermediate, aryl Pd(II), and C═O—Pd complexes were captured by ESI-MS/MS, which provide new experimental evidence for the understanding of addition mechanism.
Photocatalytic decarboxylative coupling between α-oxocarboxylicacids and alkenes
作者:Ziyue Chen、Fangling Lu、Feng Yuan、Juanjuan Sun、Linyu Du、Zhen Li、Meng Gao、Renyi Shi、Aiwen Lei
DOI:10.1007/s11426-019-9616-8
日期:2019.11
in running decarboxylation to construct ketone derivatives. In this article, we have developed a photocatalytic decarboxylative cross-coupling of α-oxocarboxylicacids and olefins to the synthesis of diverse aryl ketones. Various alkenes and α-oxocarboxylicacids were compatible, generating the desired products in up to 90% yield. Preliminary mechanism studies suggest that a freeradical pathway is involved
Palladium-catalyzed conjugate addition of arylsulfonyl hydrazides to α,β-unsaturated ketones
作者:Wen Chen、Hui Chen、Fuhong Xiao、Guo-Jun Deng
DOI:10.1039/c3ob40518d
日期:——
A palladium-catalyzed desulfitative–denitrogenative conjugate addition of arylsulfonylhydrazides to α,β-unsaturated ketones is described. The reaction showed very good selectivity and tolerated a wide range of functionalities under an atmosphere of oxygen with or without the aid of a metal co-oxidant.