Chemistry of Heterocyclic Compounds

, Volume 26, Issue 8, pp 884–886 | Cite as

Reaction of isocyanates with pyrazol-5-ones

  • I. A. Vostokov
  • L. V. Vasyaeva
  • G. A. Maricheva
  • E. P. Trub
Article
  • 34 Downloads

Abstract

Treatment of mono- and diisocyanates with 3-methyl-4-alkyl(aryl)pyrazol-5-ones by heating in absolute dioxane gives the corresponding 1-carbamoylpyrazol-5-ones. Using PMR spectroscopy it has been shown that they exist in the 5-hydroxypyrazole form in DMSO, dimethylacetamide, chloroform, or acetone solutions.

Keywords

Spectroscopy Acetone DMSO Organic Chemistry Chloroform 

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Literature Cited

  1. 1.
    S. Petersen, Ann. Chemie, 562, 205 (1949).Google Scholar
  2. 2.
    German Patent No. 3,114,833, Abstract of Applications, No. 43, Part 1 (1982).Google Scholar
  3. 3.
    T. L. Jacobs, in: Heterocyclic Compounds, R. Elderfield (ed.) [Russian translation], Vol. 5, Mir, Moscow (1961), p. 84.Google Scholar

Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • I. A. Vostokov
    • 1
  • L. V. Vasyaeva
    • 1
  • G. A. Maricheva
    • 1
  • E. P. Trub
    • 1
  1. 1.Dzerzhinsk BranchState Science Research and Theoretical Institute for the Nitrogen Industry and Organic SyntheticsDzerzhinsk

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