Photocatalytic Generation of 2-Azolyl Radicals: Intermediates for the Azolylation of Arenes and Heteroarenes via C–H Functionalization
作者:Amandeep Arora、Jimmie D. Weaver
DOI:10.1021/acs.orglett.6b01718
日期:2016.8.19
2-bromoazoles via photocatalysis, is a powerful intermediate for the intermolecular arylation of unmodified (hetero)arenes. The reaction is characterized by mild conditions, operational simplicity, tolerance toward functional and sterically demanding groups, broad scope, and anti-Minisci selectivity. A working mechanism is provided, and a low-solubility amine is essential for successful coupling. The utility
由2-溴唑通过光催化产生的2-偶氮基自由基是未修饰(杂)芳烃分子间芳基化的有力中间体。该反应的特征在于条件温和,操作简单,对官能团和空间要求高的基团的耐受性,范围广和抗Minisci选择性。提供了一种工作机制,并且低溶解度的胺对于成功偶联至关重要。该反应的实用性通过甲基雌酮的后期官能化和向其他溴代芳烃的应用证明。