Copper and manganese co-mediated cascade aza-Michael addition/cyclization and azidation of 1,3-enynes: regioselective synthesis of fully substituted azido pyrroles.

An efficient Cu and Mn co-mediated aerobic oxidative cyclization and azidation reaction of 1,3-enynes with amines and trimethylsilyl azide (TMSN3) for the synthesis of fully substituted azido pyrroles has been developed. The three-component reaction has the characteristics of high regioselectivity, wide substrate scope, and mild reaction conditions. A preliminary mechanism for this transformation is proposed.