diacetylmethylene derivatives which were further oxidized. It was found that this direct diacetylmethylation was effective when the ionization potential of the aromatic compound was lower than 8.12 eV, and that the diacetylmethyl radical which was generated directly by the thermolysis of tris(2,4-pentanedionato)manganese(III) has an electrophilic nature based on the result of the oxidation of substituted
在
乙酸中用三(
2,4-戊二酮基)
锰(III)
氧化
萘以良好至中等产率得到
二乙酰甲基衍
生物。使用过量的
氧化剂,乙酰
甲基取代的
萘被进一步
氧化,得到 3-乙酰
氧基-3-
萘基-
2,4-戊二酮。
蒽的类似
氧化也产生(
二乙酰甲基)
蒽以及进一步
氧化的
二乙酰亚
甲基衍
生物。发现当芳香族化合物的电离电位低于 8.12 eV 时,这种直接
二乙酰甲基化是有效的,并且由三(
2,4-戊二酮)
锰(III)热解直接产生的
二乙酰甲基自由基具有基于取代
萘氧化的结果的亲电性。