Facile One-Pot Assembly of Imidazotriazolobenzodiazepines via Indium(III)-Catalyzed Multicomponent Reactions
作者:Huy H. Nguyen、Teresa A. Palazzo、Mark J. Kurth
DOI:10.1021/ol402045h
日期:2013.9.6
An operationally simple, one-pot multicomponent reaction has been developed for the assembly of 9H-benzo[f]imidazo[1,2-d][1,2,3]triazolo[1,5-a][1,4]diazepines adorned with three diversification points via an atom-economical transformation incorporating alpha-diketones, o-azidobenzaldehydes, propargylic amines, and ammonium acetate. This process involves tandem InCI3-catalyzed cyclocondensation and intramolecular azide-alkyne 1,3-dipolar cycloaddition reactions; optimization data, substrate scope, and mechanistic insights are discussed.