Copper(I)-mediated carboamination of vinyl azides by aryldiazonium salts: synthesis of N2-substituted 1,2,3-triazoles

A copper(I)-mediated carboamination cascade reaction between vinyl azides and aryldiazonium salts is described. Functionally diverse N-2-substituted 1,2,3-triazoles were obtained in moderate to good yields through novel difunctionalization of vinyl azides by aryldiazonium salt sources. This method has a wide scope, good functional-group tolerance and insensitivity to an ambient atmosphere.