D. L. Obydennov, L. R. Khammatova, V. Sosnovskikh
Mar 1, 2017
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0
Influential Citations
7
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Journal
Mendeleev Communications
Abstract
Ethyl 5-aroyl-4-pyrone-2-carboxylates react with hydroxylamine in ethanol at –20 °C for 30 days to produce ethyl 4-(5-arylisoxazol-4-yl)-2,4-dioxobutanoates (yields 20–67%). The similar reaction of diethyl 4-pyrone-2,5-dicarboxylate gives ethyl 4-oxo-4H-pyrano[3,4-d]isoxazole-6-carboxylate in 37% yield.