A palladium-catalyzed three-component reaction for the preparation of quinazolin-4(3H)-imines
作者:Guanyinsheng Qiu、Gang Liu、Shouzhi Pu、Jie Wu
DOI:10.1039/c2cc18001d
日期:——
A novel and efficient route for the preparation of quinazolin-4(3H)-imines via a palladium-catalyzed three-component reaction of carbodiimide, isocyanide, and nucleophile is described. The palladium-catalyzed isocyanide insertion is believed to be the key step during the reaction process.
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.