Catalytic systems for stereoselective synthesis of chiral amines by enantiodivergent radical C—H amination
申请人:Trustees of Boston College
公开号:US11161827B2
公开(公告)日:2021-11-02
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(sp3)—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.
从一个方面来说,本公开涉及一种基于对映分离式 H 原子抽取和立体选择性自由基取代的顺序组合的自由基过程中的不对称诱导模式。此外,还公开了一种不对称体系,用于通过氨基磺酰叠氮的 1,5-C-H 氨基化自由基立体选择性地合成 5 元环氨基磺酰胺。所公开的金属态系统可以系统地控制催化自由基 C-H 氨基化过程中的不对称诱导程度和意义。所公开的体系适用于具有不同类型 C(sp3)-H 键的多种底物,并具有反应活性和选择性,可以以高度对映富集的形式获得有用的五元环氨基磺酰胺的两种对映体。同时公开的还有用于这些工艺的催化剂。本摘要旨在作为在特定技术领域进行搜索的扫描工具,并非对本公开内容的限制。