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Chemistry of Heterocyclic Compounds

, Volume 19, Issue 8, pp 845–847 | Cite as

Mass spectra of some dihydro-8H-pyrano (thiopyrano)- and piperidino[4′,3′:4,5]thieno[2,3-d]-4-aminopyrimidines

  • R. G. Mirzoyan
  • K. E. Basentsyan
  • P. B. Terent'ev
  • A. S. Noravyan
  • A. P. Mkrtchyan
Article
  • 25 Downloads

Abstract

It was established that the principal pathways in the mass-spectrometric fragmentation of dihydro-8H-pyrano (thiopyrano) — and piperidino[4′,3′∶4,5] thieno [2,3-d]-4-aminopyrimidines are associated with retrodiene fragmentation of the saturated heterocyclic ring and the loss of a hydrogen atom or the elimination of the substituent adjacent to the heteroatom of the saturated ring. The fragmentation of the substituent of the pyrimidine part of the molecule occurs only in the case of more profound stages of the fragmentation. This makes it possible to assume primary localization of the positive charge in the molecular ion in the region of the thiophene ring.

Keywords

Hydrogen Mass Spectrum Organic Chemistry Hydrogen Atom Pyrimidine 
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 Publishing Corporation 1984

Authors and Affiliations

  • R. G. Mirzoyan
    • 1
    • 2
  • K. E. Basentsyan
    • 1
    • 2
  • P. B. Terent'ev
    • 1
    • 2
  • A. S. Noravyan
    • 1
    • 2
  • A. P. Mkrtchyan
    • 1
    • 2
  1. 1.Armenian BranchAll-Union Scientific-Research Institute of Chemical Reagents and Ultrapure Chemical SubstancesErevan
  2. 2.M. V. Moscow State UniversityMoscow

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