Kinetic Resolution of β-Hydroxy Carbonyl Compounds via Enantioselective Dehydration Using a Cation-Binding Catalyst: Facile Access to Enantiopure Chiral Aldols
作者:Sushovan Paladhi、In-Soo Hwang、Eun Jeong Yoo、Do Hyun Ryu、Choong Eui Song
DOI:10.1021/acs.orglett.8b00547
日期:2018.4.6
β-hydroxy carbonyl (aldol) compounds through enantioselective dehydration process was developed using a cation-binding Song’s oligoethylene glycol (oligoEG) catalyst with potassium fluoride (KF) as base. A wide range of racemic aldols was resolved with extremely high selectivity factors (s = up to 2393) under mild reaction conditions. This protocol is easily scalable. It provides an alternative approach for
通过使用阳离子结合的宋氏低聚乙二醇(oligoEG)催化剂,以氟化钾(KF)为基础,开发了通过对映选择性脱水过程开发的外消旋β-羟基羰基(aldol)化合物的实用且高度对映选择性的非酶动力学拆分方法。在温和的反应条件下,极高的选择性因子(s =高达2393)可分离出多种外消旋醇醛。该协议易于扩展。它为合成对映体纯形式的多种生物学和药学上相关的手性醇醛提供了另一种方法。例如,外消旋姜醇可以以极高的效率(s> 240),在一个步骤中同时提供对映体纯的姜黄醇和相应的Shogaols。这种动力学拆分过程的显着效果可归因于在由手性催化剂,底物和KF产生的密闭超分子手性笼中的系统协同氢键催化。