作者:Yanshuo Zhu、Jingcheng Shi、Wei Yu
DOI:10.1021/acs.orglett.0c03297
日期:2020.11.20
Herein, we report a new photochemical method for C(sp3)–H chlorination of amides which employs tert-butyl hypochlorite as the chlorinating agent and a household compact fluorescent lamp as the light source. The reaction proceeds via N-heterocyclic carbene SIPr·HCl-promoted N–H chlorination and subsequent photoinduced Hofmann–Löffler–Freytag chlorine atom transfer. The latter process is facilitated
在此,我们报告了一种新的光化学方法,用于酰胺的C(sp 3)-H氯化反应,该方法采用次氯酸叔丁酯作为氯化剂,并使用家用紧凑型荧光灯作为光源。反应通过N杂环卡宾SIPr·HCl促进的N–H氯化反应进行,随后进行光诱导的Hofmann–Löffler–Freytag氯原子转移。(二乙酰氧基碘)苯促进了后一种方法。该方案具有广泛的适用范围,适用于甲基氢以及亚甲基和次甲基氢的现场选择性氯化。