Direct Acylation of Aryl Chlorides with Aldehydes by Palladium−Pyrrolidine Co-catalysis
摘要:
A palladium catalyst system has been developed that allows for the direct acylation of aryl chlorides with aldehydes. The choice of ligand, as well as the presence of pyrrolidine and molecular sieves is shown to be critical to the catalysis, which appears to proceed via an enamine intermediate. The reaction was successful for a wide range of aryl chlorides and tolerant of functionality on the aldehyde component, giving easy access to alkyl aryl ketones in modest to good yields.
Direct Acylation of Aryl Bromides with Aldehydes by Palladium Catalysis
作者:Jiwu Ruan、Ourida Saidi、Jonathan A. Iggo、Jianliang Xiao
DOI:10.1021/ja804351z
日期:2008.8.13
A new protocol for the direct acylation of aryl bromides with aldehydes is established. It appears to involve palladium-amine cooperative catalysis, affording synthetically important alkyl aryl ketones in moderate to excellent yields in a straightforward 7 manner, and broadening the scope of metal-catalyzed coupling reactions,