Reaction of isocyanates with pyrazol-5-ones |
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| Authors: | I. A. Vostokov L. V. Vasyaeva G. A. Maricheva E. P. Trub |
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| Affiliation: | (1) Dzerzhinsk Branch, State Science Research and Theoretical Institute for the Nitrogen Industry and Organic Synthetics, 606025 Dzerzhinsk |
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| 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.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1058–1060, August, 1990. |
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