Parallel Kinetic Resolution of Racemic Aldehydes by Use of Asymmetric Horner−Wadsworth−Emmons Reactions
作者:Torben M. Pedersen、Jakob F. Jensen、Rikke E. Humble、Tobias Rein、David Tanner、Kerstin Bodmann、Oliver Reiser
DOI:10.1021/ol991387h
日期:2000.2.1
[reaction: see text] A racemic aldehyde can undergo parallel kinetic resolution (PKR) by simultaneous reaction with two different chiral phosphonates, differing either in the structure of the chiral auxiliary or in the structure of the phosphoryl group (i.e., one (E)- and one (Z)-selective reagent). This strategy allows conversion of a racemic aldehyde to two different, synthetically useful chiral
[反应:参见正文]外消旋醛可通过与两种不同的手性膦酸酯同时反应而经历平行动力学拆分(PKR),手性助剂的结构或磷酰基的结构不同(即一个(E) -和一种(Z)选择性试剂)。与常规的动力学拆分方法相比,该策略允许将外消旋醛转化为两种不同的,合成上有用的手性产物,具有基本翻倍的材料通量和相似或改进的选择性。