RING–RING TAUTOMERISM IN 1,3-ALKANOYLHYDRAZONOXIMES OF ACETYLACETONE

Authors

  • А. Ю. Ершов Institute of High Molecular Compounds, Russian Academy of Sciences, St. Petersburg
  • А. B. Добродyмов Institute of High Molecular Compounds, Russian Academy of Sciences, St. Petersburg

DOI:

https://doi.org/10.1007/244

Keywords:

5-hydrazino-delta2-isoxazolines, 5-hydroxyamino-delta2-pyrazolines, ring–ring tautomerism

Abstract

The coexistence in solution of tautomeric isoxazoline and pyrazoline forms of 1,3 alkanoylhydrazonoximes of acetylacetone has been detected and investigated by 1H and 13C NMR spectroscopic methods. The compounds indicated eliminate hydroxylamine under the action of acid catalysts, forming 1-acyl-3,5-dimethylpyrazoles.

Authors: A. Yu. Ershov and A. V. Dobrodumov.

English Translation in Chemistry of Heterocyclic Compounds, 2000, 36 (6), pp 722-727

http://link.springer.com/article/10.1007/BF02297682

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Published

2013-02-05

Issue

No. 6 (2000)

Section

Original Papers