Efficient use of a surfactant for copper-catalyzed coupling reaction of arylboronic acids with imidazoles in water
摘要:
Copper-catalyzed oxidative coupling of arylboronic acids with imidazoles in water was realized by using an amphiphilic surfactant. By choosing an appropriate surfactant, reactions of a variety of arylboronic acids proceeded smoothly under mild and base-free conditions, providing an efficient, practical, and greener method for the synthesis of N-arylimidazoles. (C) 2012 Elsevier Ltd. All rights reserved.
N-(1-Oxy-2-picolyl)oxalamic acids as a new type of O,O-ligands for the Cu-catalyzed N-arylation of azoles with aryl halides in water or organic solvent
作者:Yongbin Wang、Yu Zhang、Beibei Yang、Ao Zhang、Qizheng Yao
DOI:10.1039/c5ob00045a
日期:——
identified as novel efficient ligands for copper-catalyzed C–N cross-coupling of azoles and arylhalides in water. The N-arylation of imidazoles, indoles and pyrazoles proceeded with moderate to excellent yields and complete selectivity over aromatic amines and phenols. Moreover, L5, which is also efficient in organic solvent with low catalyst loading, can be used to promote the N-arylation reactions with
Highly Functional Group Tolerance in Copper-Catalyzed <i>N</i>-Arylation of Nitrogen-Containing Heterocycles under Mild Conditions
作者:Liangbo Zhu、Gaocan Li、Liang Luo、Peng Guo、Jingbo Lan、Jingsong You
DOI:10.1021/jo802669b
日期:2009.3.6
A copper-catalyzed process has been developed for the N-arylation reaction under very mild conditions in the absence of additional ligand. This protocol could not only tolerate an array of thermally sensitive functional groups, but also achieve high chemoselectivity.