作者:Kun Wang、Lin Zhang、Weijun Tang、Huaming Sun、Dong Xue、Ming Lei、Jianliang Xiao、Chao Wang
DOI:10.1002/anie.202003104
日期:2020.7.6
example of an asymmetric Guerbet reaction has been developed. Using commercially available, classic Noyori RuII‐diamine‐diphosphine catalysts, well‐known in asymmetric hydrogenation, racemic secondary alcohols are shown to couple with primary alcohols in the presence of a base, affording new chiral alcohols with enantiomeric ratios of up to 99:1. Requiring no reducing agents, the protocol provides an easy
已经开发出不对称Guerbet反应的第一个例子。使用在不对称氢化中众所周知的市售经典Noyori Ru II-二胺-二膦催化剂,外消旋仲醇在碱存在下与伯醇偶合,可提供对映体比例高达99的新型手性醇: 1。不需要还原剂,该方案为合成手性醇提供了一种简便的替代途径。机理研究表明,该反应是通过Ru催化的不对称氢自转移过程与碱促进的烯丙醇异构化协同进行的。