Improved Catalysts for the Iridium‐Catalyzed Asymmetric Isomerization of Primary Allylic Alcohols Based on Charton Analysis
作者:Luca Mantilli、David Gérard、Sonya Torche、Céline Besnard、Clément Mazet
DOI:10.1002/chem.201001311
日期:2010.11.8
improved generation of chiral cationic iridium catalysts for the asymmetric isomerization of primary allylic alcohols is disclosed. The design of these air‐stable complexes relied on the preliminary mechanistic information available, and on Charton analyses using two preceding generations of iridium catalysts developed for this highly challenging transformation. Sterically unbiased chiral aldehydes
公开了用于伯烯丙基醇的不对称异构化的手性阳离子铱催化剂的改进的产生。这些空气稳定的配合物的设计依赖于可用的初步机理信息,并且依赖于Charton分析,Charton使用前两代为该极富挑战性的转化而开发的铱催化剂进行了分析。具有高水平的对映选择性,获得了以前无法获得的立体无偏手性醛,因此验证了有关所选配体设计元素的最初假设。还介绍了在大多数情况下实现高对映选择性的基本原理。