Titanium(IV) Chloride Promoted Syntheses of New Imidazo[1,2-<i>a</i>]pyridine Derivatives under Microwave Conditions
作者:Lisheng Cai、Chad Brouwer、Kathryn Sinclair、Jessica Cuevas、Victor W. Pike
DOI:10.1055/s-2005-918490
日期:——
imidazo[1,2-a]pyridine derivatives from the reaction of 2-aminopyridines with α-haloketones. The critical reagent is titanium(IV) chloride, which appears to serve as a strongdehydrating agent to promote formation of putative Schiff base intermediates, which cyclize subsequently to form the products. The reactions were performed rapidly under microwave conditions. Multiple reaction conditions were evaluated