Palladium-catalysed atom-economical synthesis of conjugated dienals from terminal acetylenes and acrolein
作者:Zoë Hearne、Chao-Jun Li
DOI:10.1039/c7cc02767b
日期:——
the prevalence of the (E,E)-diene in a wide range of functional molecules. It is shown herein that (E,E)-dienals can be readily prepared in two palladium-catalysed steps from simple, unactivated starting materials; terminal acetylenes and acrolein can be coupled via conjugate addition, followed by alkyne isomerisation. This procedure provides a highly atom-economical, redox-neutral and practical method
共轭(E,E)二烯化合物由于其三官能,亲电性质以及(E,E)-二烯在各种功能分子中的普遍性而成为通用的合成中间体。本文表明,(E,E)二烯醛可以容易地在两个钯催化的步骤中由简单的,未活化的起始原料制备。末端乙炔和丙烯醛可通过共轭加成偶联,然后进行炔烃异构化。该程序提供了一种高度原子经济,氧化还原中性且实用的方法,可以以良好的收率和非对映选择性制备一系列共轭(E,E)二烯。