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Chemistry of Heterocyclic Compounds

, Volume 10, Issue 4, pp 397–399 | Cite as

Thermal isomerization of the isoxazole ring and rearrangement processes in the mass spectra of 3-aryl-5-methylisoxazole-4-carboxylic acids

  • K. K. Zhigulev
  • R. A. Khmel'nitskii
  • M. A. Panina
Article
  • 45 Downloads

Abstract

The mass spectra of 15 compounds of 3-aryl-5-methylisoxazole-4-carboxylic acid and their derivatives were investigated. Thermal isomerization of the isoxazole ring was observed for several derivatives of this series. The formation of rearranged pseudomolecular ions of the arylamines during the dissociative ionization of 3-aryl-5-methylisoxazole-4-carboxylic acids was examined on the basis of a study of the mass spectra of labeled compounds. It is assumed that there is a high probability of concerted elimination of several groups in the first step of the disintegration of the molecular ion.

Keywords

Mass Spectrum Organic Chemistry High Probability Isoxazole Arylamines 
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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Literature cited

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Copyright information

© Plenum Publishing Corporation 1975

Authors and Affiliations

  • K. K. Zhigulev
    • 1
  • R. A. Khmel'nitskii
    • 1
  • M. A. Panina
    • 1
  1. 1.K. A. Timiryazev Moscow Agricultural AcademyUSSR

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