BF3 center dot OEt2/TMSN3 Mediated Regioselective Azidolysis of Vinylaziridines

An easy and general azidolysis of vinylepoxides mediated by BF3 center dot OEt2 and TMSN3 recently reported by our group has been extended to vinylaziridines. The reaction affords unsaturated azido derivatives with complete stereoselectivity and regioselectivity, when in the presence of electron-poor olefins, regardless of the size of substituents on the heterocyclic ring.