CATALYTIC SYSTEMS FOR STEREOSELECTIVE SYNTHESIS OF CHIRAL AMINES BY ENANTIODIVERGENT RADICAL C-H AMINATION
申请人:Trustees of Boston College
公开号:US20200317627A1
公开(公告)日:2020-10-08
In one aspect, the disclosure relates to a mode of asymmetric induction in radical processes based on sequential combination of enantiodifferentiative H-atom abstraction and stereoretentive radical substitution. Also disclosed is an asymmetric system for stereoselective synthesis of strained 5-membered cyclic sulfamides via radical 1,5-C—H amination of sulfamoyl azides. The disclosed metalloradical system can control the degree and sense of asymmetric induction in the catalytic radical C—H amination in a systematic manner. The disclosed system is applicable to a broad scope of substrates with different types of C(sp
3
)-H bonds and exhibits reactivity and selectivity, providing access to both enantiomers of useful 5-membered cyclic sulfamides in a highly enantioenriched form. Also disclosed are catalysts useful in these processes. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.
在一个方面,该公开涉及基于手性差异化氢原子抽取和立体保留自由基取代的顺序组合的不对称诱导模式在自由基过程中的应用。还公开了一种用于通过磺胺酰叠氮化物的自由基1,5-C—H胺化对合成受限的5-成员环磺胺的立体选择性合成的不对称系统。所公开的金属自由基系统可以以系统化的方式控制催化自由基C—H胺化中的不对称诱导程度和方向。所公开的系统适用于具有不同类型的C(sp3)-H键的广泛底物范围,并表现出反应性和选择性,以高度手性富集形式提供对有用的5-成员环磺胺的两个对映体的访问。还公开了在这些过程中有用的催化剂。本摘要旨在作为在特定领域搜索的扫描工具,不打算限制本公开。