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Chemistry of Heterocyclic Compounds

, Volume 33, Issue 12, pp 1443–1449 | Cite as

Synthesis and reactions of 1-(4-bromo-, 4-fluoro-, and 4-trifluoromethylphenyl)-6,6-dimethyl-4-oxo-4,5,6,7-tetrahydroindazoles

  • A. Ya. Strakov
  • N. N. Tonkikh
  • M. V. Petrova
  • I. A. Strakova
Article

Abstract

From 2-formyldimedone and 4-bromo-, 4-fluoro-, and 4-trifluoromethylphenylhydrazines we have obtained the corresponding 2-arylhydrazinomethylenedimedones, which in acid medium undergo ring closure to form 1-substituted 6,6-dimethyl-4-oxo-4,5,6,7-tetrahydroindazoles. Oxidation of the latter by selenous acid leads to the corresponding 4,5-dioxo-4,5,6,7-tetrahydroindazoles, which then were converted to derivatives of 4,5-dihydro-3H-pyrazolo[4,3-a]phenazine and 4,5-dihydro-1H(3H)-indazolo[4,5-d]imidazole.

Keywords

Oxidation Organic Chemistry Imidazole Acid Medium Phenazine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publising Corporation 1988

Authors and Affiliations

  • A. Ya. Strakov
  • N. N. Tonkikh
  • M. V. Petrova
  • I. A. Strakova

There are no affiliations available

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