Bu<sub>4</sub>NI-Catalyzed, Radical-Induced Regioselective <i>N</i>-Alkylations and Arylations of Tetrazoles Using Organic Peroxides/Peresters
作者:Suresh Rajamanickam、Chitranjan Sah、Bilal Ahmad Mir、Subhendu Ghosh、Garima Sethi、Vinita Yadav、Sugumar Venkataramani、Bhisma K. Patel
DOI:10.1021/acs.joc.9b02875
日期:2020.2.21
using tert-butyl hydroperoxide (TBHP) as the methyl source, alkyl diacyl peroxides as the primary alkyl source, alkyl peresters as the secondary and tertiary alkyl sources, and aryl diacyl peroxides as the arylating source. These reactions proceed without pre-functionalization of tetrazole and in the absence of any metal catalysts. Here, peroxides serve the dual role of oxidants as well as alkylating or
使用叔丁基过氧化氢(TBHP)作为甲基源,烷基二酰基过氧化物作为主要烷基源,烷基过酸酯作为仲和叔基,已经实现了Bu4NI催化的四唑的区域选择性N2-甲基化,N2-烷基化和N2-芳基化烷基来源和芳基二酰基过氧化物作为芳基化来源。这些反应在没有四唑的预官能化和没有任何金属催化剂的情况下进行。在此,过氧化物起到氧化剂以及烷基化或芳基化剂的双重作用。根据DFT计算,发现自旋密度,过渡态势垒(动力学控制)和产物的热力学稳定性(热力学控制)在N-烷基化过程中观察到的区域选择性中起着至关重要的作用。