No abstract

A novel and reliable method of preparation of the title compound (V) and of its N‐oxide (VIII) is reported.

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The reactions of the title compounds (I) and (VIII) using reaction conditions A) and B), resp., provides the various heterocyclic products shown in the scheme.

Nitration of 4-Substituted 2-Phenyl-1,2,3-triazoles.-The nitration of 4-substituted 2-phenyl-1,2,3-triazoles is shown to depend on the electronic nature of the 4-substituent.Electron-accepting substituents decrease the electronic density at position 5 of the triazole ring and thus only the phenyl ring is nitrated in positions 2 and 4. In contrast, electron-donating substituents enable nitration at the phenyl group as well as at the 5-position of the triazole ring. -(MESHCHERYAKOV, V. I.; MIKIYA, D. V.; KIRILLOVA, L. P.; SHUL'GINA, V. M.; VERESHCHAGIN, L. I.; Zh. Org.