1,2-Diaroyldiaziridines react with octacarbonyldicobalt in benzene, at 65–70°C, to give dihydro-oxazoles by an intramolecular displacement-rearrangement reaction; thermal rearrangement of the strained-ring heterocycles affords 4,5-dihydro-oxadiazoles.
D. Roberto and H. Alper, J. Chem. Soc., Chem. Commun., 1987, 212 DOI: 10.1039/C39870000212
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