Directed β C–H Amination of Alcohols via Radical Relay Chaperones
作者:Ethan A. Wappes、Kohki M. Nakafuku、David A. Nagib
DOI:10.1021/jacs.7b05214
日期:2017.8.2
for β C-H amination of alcohols has been developed. This approach employs a radical relay chaperone, which serves as a traceless director that facilitates selective C-H functionalization via 1,5-hydrogen atom transfer (HAT) and enables net incorporation of ammonia at the β carbon of alcohols. The chaperones presented herein enable direct access to imidate radicals, allowing their first use for H atom
已经开发了一种自由基介导的醇类 β CH 胺化策略。该方法采用自由基中继伴侣,作为无痕导向剂,通过 1,5-氢原子转移 (HAT) 促进选择性 CH 官能化,并使氨在醇的 β 碳上净结合。本文介绍的分子伴侣能够直接访问亚胺酸酯自由基,从而使其首次用于 H 原子提取。简化的方案能够将醇快速转化为它们的 β-氨基类似物(通过将醇原位转化为亚胺酸酯、定向 CH 胺化和水解为 NH2)。机械实验表明 HAT 是限速的,而分子内胺化是产物和立体决定。