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 variety of beta-aryl ketones and aldehydes were facilely synthesized via a Pd(II)/Ag2CO3-mediated decarboxylative Heck type reaction between readily available benzoic acid derivatives and allylic alcohols under mild conditions. The control experiments indicated that this transformation may proceed via a hydrogen migration process.