| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | ethyl 3-(4-methylphenyl)amino-2-(5-nitropyridin-2-yl)-5-oxo-2,5-dihydroisoxazole-4-carboxylate | 506436-33-5 | C18H16N4O6 | 384.348 |
| —— | ethyl 2-(benzoxazol-2-yl)-3-(4-methylphenylamino)-5-oxo-2,5-dihydroisoxazole-4-carboxylate | 945917-86-2 | C20H17N3O5 | 379.372 |
| —— | ethyl 2-(benzothiazol-2-yl)-3-(4-methylphenyl)amino-5-oxo-2, 5-dihydroisoxazole-4-carboxylate | 948905-03-1 | C20H17N3O4S | 395.439 |
Ethyl 5-oxo-3-(4-toluidino)-2,5-dihydro-4-isoxazolecarboxylate was prepared from the reaction of diethyl 2-(4-toluidinocarbothioyl)malonate with hydroxylamine. Its reaction with 2- chlorobenzoxazole gave the corresponding N-substituted isoxazolone. The structure of the final product 4 was confirmed by IR, 1H and 13C NMR spectroscopy and mass spectrometry, and by X-ray single crystal structure determination.