Reaction of sodium nitrite with the aziridine (1) in the presence of benzoic acid leads to the formation of the 1,2,4-oxadiazoline (8), photolysis of which in benzene provides methylbenzimidazole-2-carboxylate (9).
M. Vaultier and R. Carrié, J. Chem. Soc., Chem. Commun., 1978, 356b DOI: 10.1039/C3978000356B
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