Simple and eco-friendly synthesis of polyfunctionalized 2-aminopyrroles from vinyl azides and α-cyano derivatives has been accomplished with a good to excellent yield. The reaction was performed in ethanol/water co-solvent system without catalyst and the workup was facile. A plausible mechanism has been proposed.
An efficient method for the synthesis of polyfunctional imidazoles from vinyl azides and amidine has been developed. Starting from vinyl azide and amidine, this transformation proceeds without any additives and the obtained imidazoles can be decorated with ester functional group that is a promising site for further modification.
Catalyst-Free Preparation of 1,2,4,5-Tetrasubstituted Imidazoles from a Novel Unexpected Domino Reaction of 2-Azido Acrylates and Nitrones
作者:Bao Hu、Zhao Wang、Ning Ai、Jie Zheng、Xing-Hai Liu、Shang Shan、Zhongwen Wang
DOI:10.1021/ol202650z
日期:2011.12.16
A highly efficient and convenient method for the synthesis of 1,2,4,5-tetrasubstitutedimidazoles from readily accessible 2-azidoacrylates and nitrones has been developed. This reaction proceeded under mild conditions without the assistance of any metal, acid, or base.
One-pot synthesis of 1,2,4,5-tetrasubstituted imidazoles by a tandem three-component reaction of hydroxylamines, aldehydes and 2-azido acrylates
作者:Bao Hu、Ning Ai、Zhao Wang、Xiaoliang Xu、Xiaonian Li
DOI:10.3998/ark.5550190.0013.621
日期:——
The reaction of nitrones, formed in situ by reaction of hydroxylamines and aldehydes, with 2azido acrylates results in the formation of 1,2,4,5-tetrasubstitutedimidazoles has been developed. This three-componentreaction allows for the formation of a diverse array of imidazole derivatives with moderate to excellent yields.