960化工网
Copper catalyzed tandem oxidative C–H amination/cyclizations: Direct access to imidazo[1,2-a]pyridines†
Kasiviswanadharaju Pericherla,Pinku Kaswan,Poonam Khedar,Bharti Khungar,Keykavous Parang,Anil Kumar
RSC Advances Pub Date : 08/08/2013 00:00:00 , DOI:10.1039/C3RA43889A
Abstract

A simple and convenient strategy is described for the synthesis of imidazo[1,2-a]pyridines via inexpensive copper-catalyzed tandem imine formation and intramolecular aerobic oxidative C–H bond amination/cyclizations. An array of imidazo[1,2-a]pyridines were prepared by the reaction of readily available acetophenones and 2-aminopyridines in good to excellent yields (48–92%). The scope of the method was validated by a single step synthesis of Zolimidine, a drug used for peptic ulcers, in 61% yield.

Graphical abstract: Copper catalyzed tandem oxidative C–H amination/cyclizations: Direct access to imidazo[1,2-a]pyridines
平台客服
平台客服
平台在线客服