Substrate-Dependent Mechanistic Divergence in Decarboxylative Heck Reaction at Room Temperature
作者:Asik Hossian、Samir Kumar Bhunia、Ranjan Jana
DOI:10.1021/acs.joc.6b00100
日期:2016.3.18
We report herein a Pd(II)-catalyzed Heck-type coupling between arene carboxylic acids and alkenes at room temperature. Mechanistically, the reaction proceeds in two distinct pathways where electron-rich substrates undergo a palladium(II)-catalyzed decarboxylation and electron-deficient substrates proceed through silver(I)-assisted decarboxylation. Dimethylsulfoxide (DMSO) or sulfide ligands have positive
A Facile Synthesis of Pentafluorophenyl Olefins<i>via</i>an Arsonium Ylide
作者:Yanchang Shen、Weiming Qiu
DOI:10.1055/s-1987-27848
日期:——
The in situ reaction of (pentafluorophenylmethylene)triphenylarsorane, generated from methylenetriphenylarsorane and hexafluorobenzene, with aromatic aldehydes gives good to excellent yields of pentafluorophenyl olefins with high stereoselectivity.