Reaction of isocyanates with pyrazol-5-ones
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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.
KeywordsSpectroscopy Acetone DMSO Organic Chemistry Chloroform
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