Halo azides aziridines

The dihydrotriazoles prepared by cycloaddition of aryl, heteroaryl, and alkyl azides to 3,4-di-azatricyclo[4.2.1.02,5]nona-3,7-diene and 3,4-diazatricyclo[4.2.1.02,5]non-7-ene derivatives were smoothly converted to exo-aziridines by treatment with catalytic amounts of adds (acetic, trifluoroacctic, sulfuric) in aprotic solvents (diethyl ether, dichloromethane, dioxane) at 25-80°C for 4-48 hours, e.g., the sequence 9 -> 10 -> 11 or 12 -> 13 -> 14. The aziridines were further converted to (6-halo and (6-hydroxy aminesl03b. 

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