Triethylborane as an efficient promoter for palladium-catalyzed allylation of active methylene compounds with allyl alcohols
摘要:
Without prior activation of allyl alcohols, allylation of a variety of active methylene compounds with allyl alcohols proceeds smoothly at rt-50degreesC in the presence of catalytic amounts of Pd(OAc)(2) (1-10mol%), Et3B (30-240 mol%), a phosphine ligand (1-20 mol%), and a base (0 to 50-60 mol%). (C) 2003 Elsevier Ltd. All rights reserved.
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