作者:Shen Qu、Samuel M. Smith、Víctor Laina‐Martín、Rifahath M. Neyyappadath、Mark D. Greenhalgh、Andrew D. Smith
DOI:10.1002/anie.202004354
日期:2020.9.14
acylative kinetic resolution (KR) of acyclic tertiary alcohols has been developed. Selectivity factors of up to 200 were achieved for the KR of tertiary alcohols bearing an adjacent ester substituent, with both reaction conversion and enantioselectivity found to be sensitive to the steric and electronic environment at the stereogenic tertiary carbinol centre. For more sterically congested alcohols
已开发出高度对映选择性的异硫脲催化的无环叔醇的酰基动力学拆分(KR)。对于带有相邻酯取代基的叔醇的KR,选择性因子高达200,反应转化率和对映体选择性均对立体异构叔丁醇中心的空间和电子环境敏感。对于空间上更拥挤的醇,最合适的方法是使用最新开发的异硒脲催化剂,对映选择性相当,但与异硫脲HyperBTM相比,转化率更高。非对映体酰化过渡态模型被提出以合理化此过程中对映歧化的起源。