Blue LED-Mediated N–H Insertion of Indoles into Aryldiazoesters at Room Temperature in Batch and Flow: Reaction Kinetics, Density Functional Theory, and Mechanistic Study
作者:Debajit Maiti、Ranajit Das、Subhabrata Sen
DOI:10.1021/acs.joc.0c02649
日期:2021.2.5
blue light-mediated N–H insertion of indole and its derivatives into aryldiazoesters has been reported in a batch and flow strategy to afford the corresponding N-alkylated product in moderate-to-excellent yield. Detailed high-performance liquid chromatography-based reaction kinetics measurements, control experiments, and kinetic isotope effect reveal that 3-substituted indoles with electron-withdrawing
间歇和流动策略已报道了轻度蓝光介导的吲哚及其衍生物在芳基重氮化合物中的NH插入,从而以中等至优异的产率提供了相应的N-烷基化产物。详细的基于高效液相色谱的反应动力学测量,对照实验和动力学同位素效应表明,带有吸电子基团(例如-CN和-CHO)的3取代的吲哚有助于产物的形成,而给电子基团则阻碍了处理。他们之间表现出中立的吲哚。此外,基于Hammett图和基于密度泛函理论的过渡态优化研究表明,吲哚C3位置取代基的电子性质与N–H插入反应的速率之间存在显着相关性。