Transformations of the Imidazole Ring in 1-Alkyl- and 1-Aryl-4- nitroimidazoles Following the Attack of Hydroxylamine or 4-Amino-1,2,4- triazole.

Novel imidazole-oxadiazole ring interconversions (transformations) accompanying nucleophilic amination of 4-nitroimidazoles by hydroxylamine or 4-amino-1, 2, 4-triazole are described with suggestions concerning mechanisms of the reactions.