Efficient copper-catalyzed N-arylation of NH-containing heterocycles and sulfonamides with arenediazonium tetrafluoroborates
作者:Yu-Qing Ouyang、Zhen-Hua Yang、Zhong-Hui Chen、Sheng-Yin Zhao
DOI:10.1080/00397911.2017.1284239
日期:2017.4.18
ABSTRACT A practical copper-catalyzed N-arylation of NH-containing heterocycles with arenediazonium tetrafluoroborates has been developed using CuCl as catalyst and K2CO3 as additive under ligand-free conditions. This reaction system has wide substrate scope including imides, 1H-pyrazole, 1H-tetrazoles, 1,2-benzisothiazol-3(2H)-one, and related sulfonamides and gives moderate to excellent yields (up
摘要 以 CuCl 为催化剂,K2CO3 为添加剂,在无配体条件下,开发了一种实用的铜催化含 NH 杂环与芳烃重氮四氟硼酸盐的 N-芳基化。该反应体系具有广泛的底物范围,包括酰亚胺、1H-吡唑、1H-四唑、1,2-苯并异噻唑-3(2H)-酮和相关磺胺类化合物,并能获得中等至极好的收率(高达 95%)的所需产物. 该策略非常通用、简单、环保且耐氧。图形概要