Copper-catalyzed synthesis of 2-aminobenzimidazoles from carbonimidoyl dichlorides and amines
作者:Hui Yu、Qiong Liu、Yuzhe Li、Chongzhi Ni
DOI:10.1016/j.tetlet.2012.07.072
日期:2012.9
A new protocol for the synthesis of a variety of 2-aminobenzimidazole derivatives has been developed. O-haloaryl carbonimidoyl dichloride reacted with anilines to generate an o-haloaryl guanidine intermediate, which underwent copper catalyzed ring closure to afford 2-aminobenzimidazole derivative in moderate yields (c) 2012 Elsevier Ltd. All rights reserved.
Synthesis of Benzoxazole and Benzimidazole Derivatives via Ligand-Free Copper(I)-Catalyzed Cross-Coupling Reaction of o-Halophenols or o-Haloanilines with Carbodiimides
作者:Guodong Shen、Weiliang Bao
DOI:10.1002/adsc.201000022
日期:——
A novel and efficient synthesis of benzoxazole and benzimidazolederivativesvia a ligand‐free, copper(I)‐catalyzed, one‐pot cascade process has been developed. A variety of carbodiimides coupled with o‐halophenols or o‐haloanilines to give the products in moderate to excellent yields under the mild conditions.