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 dual catalysis, 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-catalyzed allylic alkylation. It generates a variety of α-allylated α,β-unsaturated ketones, which are
我们在此报告了一种新的过程,我们称之为同期双催化,它选择性地偶联两种高活性催化中间体,同时克服反应中也存在的化学计量活性物质的竞争性捕获。该反应通过钒催化的炔丙基重排和钯催化的烯丙基烷基化的收敛进行。它会生成多种 α-烯丙基化的 α,β-不饱和酮,这些酮不容易通过其他方式获得。值得注意的是,这种双重催化是通过使用低催化剂负载量(1.0 mol % [Pd],1.5 mol % [V])实现的,并提供了良好至极好的收率(高达 98%)的所需产物。