一种新的衍生自 1,2-二氨基环己烷 (1,2-DACH) 的联芳基手性配体已被设计用于将脂肪族和芳香族格氏试剂不对称加成到酮中,以制备高度对映体富集的叔酒精(高达 95% ee)。新开发的配体L12和L12'以及先前报道的L0和L0'定义了一组互补的手性启动子,它提供了对各种结构多样的非外消旋叔醇的模块化结构的访问,具有挑战性的季立体中心。目前的进展通过将范围扩展到芳族有机镁试剂来完成我们的不对称格氏方法,同时由于改进的合成路线可以直接获得手性配体而促进其在有机合成中的实施。该方法的合成效用已通过通过中间体 ( R ) -3a开发一种新型的、高度对映选择性的正式合成抗组胺药 API clemastine 得到证明. 利用格氏合成提供的 3-断开方法的力量,( R )- 3a与配体 ( R , R )- L12以 94% 的 ee 获得。本文描述的工作标志着我们为手性叔醇的不对称格氏合成建
Chiral diamine compounds for the preparation of chiral alcohols and chiral amines
申请人:University College Dublin
公开号:US10196338B2
公开(公告)日:2019-02-05
Processes for stereoselective preparation of a chiral alcohol or a chiral amine are described. The processes include reacting a first prochiral reactant selected from the group consisting of a ketone, an aldehyde, and an imine, with a second reactant that includes a Grignard reagent, in the presence of a chiral trans-diamine of formula (1) as defined herein:
CHIRAL DIAMINE COMPOUNDS FOR THE PREPARATION OF CHIRAL ALCOHOLS AND CHIRAL AMINES
申请人:University College Dublin
公开号:US20170204036A1
公开(公告)日:2017-07-20
A process for the stereoselective preparation of a chiral alcohol or a chiral amine, the process comprising reacting a first prochiral reactant selected from the group consisting of a ketone, an aldehyde, and an imine, with a second reactant comprising a Grignard reagent, in the presence of a chiral trans-diamine of formula (1) as defined herein:
Also provided is the use of the chiral trans-diamine of formula (1) in a Grignard reaction and the chiral trans-diamines per se.