Practical Synthesis of Linear α-Iodo/Bromo-α,β-unsaturated Aldehydes/Ketones from Propargylic Alcohols via Au/Mo Bimetallic Catalysis
作者:Longwu Ye、Liming Zhang
DOI:10.1021/ol901346k
日期:2009.8.20
An efficient synthesis of α-iodo/bromo-α,β-unsaturated aldehydes/ketones directly from propargylic alcohols is described. This reaction is catalyzed collaboratively by two metal complexes, Ph3PAuNTf2 and MoO2(acac)2, and Ph3PO as an additive helps suppress undesired enone/enal formation. Notable features of this method include low catalyst loadings, mild reaction conditions, and mostly good to excellent
描述了直接由炔丙醇有效合成α-碘/溴-α,β-不饱和醛/酮的方法。该反应由两种金属配合物Ph 3 PAuNTf 2和MoO 2(acac)2共同催化,而Ph 3 PO作为添加剂有助于抑制不希望的烯酮/烯醛的形成。该方法的显着特点包括催化剂用量低,反应条件温和,并且大多数具有良好的非对映选择性。与我们先前开发的基于炔丙基乙酸酯底物的方法相比,该化学方法省去了制备乙酸酯衍生物的需要,而且具有更大的底物范围。