Abstract
A new bis(1,2,3-triazolo-1,4-oxazine) fused heterocyclic compound was synthesized from terminal meso-1,2,3,4-diepoxybutane via azide ring opening reaction, followed by propargylation and double 1,3-dipolar intramolecular cycloaddition. No effect on the reaction outcome was observed when Cu(I) was used as catalyst. In both cases catalyzed and uncatalyzed reactions, only the exo-tetracyclic two to two fused isomer was obtained.