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

A copper(i)-mediated carboamination cascade reaction between vinyl azides and aryldiazonium salts is described. Functionally diverse N2 -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.