中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | methyl 2-ethyl-3-oxo-2,3,4,5-tetrahydroisoxazolo[5,4-c]pyridine-6(7H)-carboxylate | 1420459-09-1 | C10H14N2O4 | 226.232 |
加波沙朵 | 4,5,6,7-tetrahydroisoxazole<5,4-c>pyridin-3-ol | 64603-91-4 | C6H8N2O2 | 140.142 |
—— | methyl 3-ethoxy-4,5-dihydroisoxazolo[5,4-c]pyridine-6(7H)-carboxylate | 1420459-10-4 | C10H14N2O4 | 226.232 |
5,6-二氢[1,2]恶唑并[5,4-c]吡啶-3,7(2H,4H)-二酮 | 3-hydroxy-7-oxo-4,5,6,7-tetrahydroisoxazolo<5,4-c>pyridine | 91305-43-0 | C6H6N2O3 | 154.125 |
—— | 3-hydroxy-4-(N-methoxycarbonyl-2-aminoethyl)-isoxazole-5-carboxylic acid | 91305-71-4 | C8H10N2O6 | 230.177 |
3-Isoxazolols can be made in good yields from β-ketoesters or diketene and hydroxylamine, provided that pH is kept at about 10 throughout the reaction, and that the reaction mixture is quenched with an excess of strong mineral acid. This suppresses the formation of 5-isoxazolones, which are otherwise normally the main products of the reaction.