Kinetically Controlled, Highly Chemoselective Acylation of Functionalized Grignard Reagents with Amides by N−C Cleavage
作者:Guangchen Li、Michal Szostak
DOI:10.1002/chem.201904678
日期:2020.1.13
(iPrMgCl⋅LiCl) permits excellent substrate scope with respect to both the amide and Grignard coupling partners. These reactions enable facile, operationally simple and chemoselective access to tetrahedral intermediates from amides under significantly milder conditions than chelation-controlled intermediates. This novel direct two-component coupling sets the stage for using amides as acylating reagents
在动力学控制下,通过高度化学选择性的NC裂解,已实现了酰胺与功能化格氏试剂的直接无过渡金属酰化反应。该方法提供了通过瞬态四面体中间体快速收敛的官能化联芳基酮的途径。通用的Turbo-Grignard试剂(iPrMgCl·LiCl)促进了通过原位卤素-镁交换而直接获得功能化Grignard试剂的优点,因此,相对于酰胺和Grignard偶合剂,都具有出色的底物范围。与螯合控制的中间体相比,这些反应能够在较温和的条件下从酰胺中轻松,操作简单且化学选择性地接近酰胺的四面体中间体。