中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
甲基苯醌 | 2-Methyl-1,4-benzoquinone | 553-97-9 | C7H6O2 | 122.123 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2,3,5-三氯-6-甲基-1,4-苯醌 | 2,3,5-trichloro-6-methyl-1,4-benzoquinone | 4592-97-6 | C7H3Cl3O2 | 225.459 |
Oxy-substituted homophthalic anhydrides have been synthesized by cycloaddition of di- and tri-oxy butadienes to the allenic diester (1). By base-catalysed cycloaddition to appropriate benzoquinones they have afforded new syntheses of viocristin (19), isoviocristin (20) and analogous 1,4-anthraquinones. Related chemistry has led to the naphthalene (34) and the anhydride (35), intermediates in published syntheses of semivioxanthin and 6- methylpretetramid respectively.