中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2,6-二甲氧基-1,4-苯醌 | 2,6-dimethoxy-p-quinone | 26547-64-8 | C8H8O4 | 168.149 |
Reaction of 2,6-dimethoxy-1,4-benzoquinone with hydroxylamine yielded 2,6-dimethoxy-4-oximino-2,5-cyclohexadienone-1 (3), as confirmed by spectroscopic analysis, and by independent synthesis from 5-nitro-1,2,3-trimethoxybenzene. Infrared and proton magnetic resonance spectra in solution showed no significant proportion of the tautomeric nitrosophenolic form of 3. When 3 was heated for 3 min at 90–95° in 1.0 N HCl in H218O, the N—OH group was stable, but the keto oxygen underwent complete exchange. Mass spectra of 3, its 18O- and deuterium-substituted derivatives indicated that a major process leading to fragmentation upon electron impact was loss of oxygen from N—OH to form the corresponding quinone imine.