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Mass-spectrometric study of the products of intramolecular cyclization of 1,3-amido alcohols. 5-6-Dihydro-4H-1,3-oxazines and 2-oxazolines

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

The mass spectra of substituted 5,6-dihydro-4H-1,3-oxazines and 2-oxazolines were studied for the identification of the products of intramolecular cyclization of 1,3-amido alcohols. The fragmentation of the molecular ions of 1,3-oxazines under the influence of electron impact proceeds via both fragmentation of the retrodiene type and with the formation of rearrangement ions, the relative intensities of the peaks of which are determined by the nature and position of the substituents in the heteroring. The molecular ions of 2-oxazolines undergo fragmentation chiefly with the loss of a molecule of a ketone.

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Authors and Affiliations

  1. M. V. Lomonosov Moscow Institute of Fine Chemical Technology, 119831, Moscow

    A. S. Moskovkin, A. P. Guzaev, I. V. Miroshnichenko, M. Ya. Botnikov & B. V. Unkovskii

Authors
  1. A. S. Moskovkin
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  2. A. P. Guzaev
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  3. I. V. Miroshnichenko
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  4. M. Ya. Botnikov
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  5. B. V. Unkovskii
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1539–1543, November, 1988.

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Moskovkin, A.S., Guzaev, A.P., Miroshnichenko, I.V. et al. Mass-spectrometric study of the products of intramolecular cyclization of 1,3-amido alcohols. 5-6-Dihydro-4H-1,3-oxazines and 2-oxazolines. Chem Heterocycl Compd 24, 1277–1281 (1988). https://doi.org/10.1007/BF00633510

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  • DOI: https://doi.org/10.1007/BF00633510

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