Chemistry of Heterocyclic Compounds

, Volume 5, Issue 5, pp 657–658 | Cite as

Investigations in the benzazole and naphthazole series

XXV. Structure and properties of methylated 1-benzazolyl-3,5-diphenylformazans
  • G. N. Lipunova
  • N. P. Bednyagina


The methylation of 1-benzazolyl-3, 5-diphenylformazans (I–III) with methyl iodide takes place at the nitrogen atom of the heterocycle and the methyl derivatives obtained do not undergo oxidation to free radicals-verdazyls. On methylation with diazomethane, 1-(benzimidazol-1′-yl)-3, 5-diphenylformazan (I) and 1-benzoxazolyl-3,5-diphenylformazan (III) form analogous methyl derivatives. In contrast to this, on methylation with diazomethane 1-benzothiazolyl-3, 5-diphenylformazan (II) is converted into a methyl derivative which, in benzene solution, undergoes spontaneous oxidation to 1-benzothiazolyl-3, 5-diphenylverdazyl (VII).


Oxidation Nitrogen Methyl Benzene Organic Chemistry 
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Copyright information

© Consultants Bureau 1972

Authors and Affiliations

  • G. N. Lipunova
    • 1
  • N. P. Bednyagina
    • 1
  1. 1.Kirov Ural Polytechnic InstituteSverdlovsk

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