Contemporaneous Dual Catalysis by Coupling Highly Transient Nucleophilic and Electrophilic Intermediates Generated in Situ
作者:Barry M. Trost、Xinjun Luan
DOI:10.1021/ja110501v
日期:2011.2.16
contemporaneous dualcatalysis, that selectively couples two highly reactive catalytic intermediates while overcoming competing trapping by stoichiometric reactive species also present in the reaction. The reaction proceeds via the convergence of a vanadium-catalyzed propargylic rearrangement and a palladium-catalyzedallylicalkylation. It generates a variety of α-allylated α,β-unsaturatedketones, which are
Contemporaneous Dual Catalysis: Chemoselective Cross-Coupling of Catalytic Vanadium–Allenoate and π-Allylpalladium Intermediates
作者:Barry M. Trost、Xinjun Luan、Yan Miller
DOI:10.1021/ja204817y
日期:2011.8.17
This paper presents a detailed investigation of a dual catalytic system that combines a vanadium-catalyzed Meyer-Schuster rearrangement and a palladium-catalyzedallylicalkylation. The implementation of this novel reaction relies on matching the formation rates of vanadium-allenoate and π-allylpalladium intermediates with their bimolecular coupling rate in order to minimize the undesired protonation