Mn(III)-mediated formal [3+3]-annulation has been developed using readily available vinylazides and cyclopropanols with a wide range of substituents. Vinylazides were successfully applied as a three-atom unit including one nitrogen to prepare pyridines and δ-lactams by the reactions with monocyclic cyclopropanols as well as to construct 2-azabicyclo[3.3.1] and 2-azabicyclo[4.3.1] frameworks with