300-87-8, An article , which mentions 300-87-8, molecular formula is C5H7NO. The compound – 3,5-Dimethylisoxazole played an important role in people’s production and life.
Some Heterocyclic Sulfonyl Chlorides and Derivatives
The syntheses of 4- and 5-chlorosulfonylfuran-2-carboxylic acid (Ia,IIa), 4-chlorosulfonylfuran-2-carboxamide (Ib), 3,5-dimethylpyrazole and isoxazole-4-sulfonyl chlorides (IIa, IVa) and 2,4-dimethylthiazole-5-sulfonyl chloride (Va) are described.The sulfonyl chlorides were converted into a range of amides, hydrazides and azides.Condensation of the sulfonohydrazides with beta-dicarbonyl compounds, gave the corresponding beta-ketohydrazones (VII), which, with the exeption of the derivatives (VIIe,f,g,i), were converted to the sulfonylpyrazoles (VIII).The structures and spectral data of these compounds are briefly discussed.The reactio n of the sodio derivative of acetylacetone with thiophene-2-sulfonyl chloride (VIc) gave 3-(thiophene-2-sulfonyl)pentane-2,4-dione (XII), which with hydrazine gave 4-(thiophene-2-sulfonyl)-3,5-dimethylpyrazole (XIII).However, the analogous reaction with thiophene-2-sulphonohydrazide (VIa) failed to give the expected 1,4-bisthiophenesulfonylpyrazole.
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Reference£º
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem