Chemistry of Heterocyclic Compounds

, Volume 9, Issue 7, pp 911–913 | Cite as

Heterocyclic analogs of xanthone

IV. Physicochemical properties of 9-oxochromeno-[3,2-d]pyrazoles, 9-oxothiochromeno[3,2-d]pyrazoles, and 8-oxodipyrazolopyrans
  • A. S. Vitvitskaya
  • M. P. Noskova
  • I. Ya. Kvitko
  • L. S. Éfros


A comparative investigation of the acid-base properties, the polarographic behavior, and the spectral characteristics of oxochromeno- and oxothiochromenopyrazoles, oxodipyrazolopyrans, and their electronic analogs xanthone and thioxanthone, has been performed. The difference in properties is due to the electron-accepting nature of the condensed pyrazole ring.


Organic Chemistry Spectral Characteristic Pyrazole Xanthone Comparative Investigation 
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Copyright information

© Plenum Publishing Corporation 1975

Authors and Affiliations

  • A. S. Vitvitskaya
    • 1
  • M. P. Noskova
    • 1
  • I. Ya. Kvitko
    • 1
  • L. S. Éfros
    • 1
  1. 1.Lensovet Leningrad Technological InstituteUSSR

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