Cu(i)-catalyzed multicomponent cascade reactions of terminal alkynes, unactivated primary alkyl bromides, CO2 and NaN3†
Abstract
A multicomponent synthesis of a variety of triazolo-fused dihydrooxazinones was realized via the carboxylative coupling/cycloaddition of alkynes, unactivated primary alkyl bromides, carbon dioxide and sodium azide. This transformation was catalyzed by CuCl/PPh3.