Straightforward Synthesis of Allylated Keto Esters: The Palladium-Catalysed Haloketone Alkoxycarbonylation/ Allylation Domino Reaction
作者:Benoit Wahl、Steven Giboulot、André Mortreux、Yves Castanet、Mathieu Sauthier、Frédéric Liron、Giovanni Poli
DOI:10.1002/adsc.201100848
日期:2012.4.16
The palladium‐catalysed α‐chloro ketone methoxycarbonylation and allylic alkylation reactions can be efficiently combined to provide a new catalytic domino reaction. The first, carbonylative, step generates the β‐keto ester, which acts as the nucleophile in a subsequent allylation step. The use of allyl phenates in combination with Xantphos ligand are the key features allowing one to obtain the allylated
methodology for the allylic C–H alkylation of unactivated alkenes with diazocompounds is demonstrated. The developed protocol is able to bypass the possibility of the cyclopropanation of an alkene upon its reaction with the acceptor–acceptor diazocompounds. The protocol is highly accomplished due to its compatibility with various unactivated alkenes functionalized with different sensitive functional groups