金属卟啉催化萘酚过氧化氢氧化(Ⅱ)──制备2-羟基-1,4-萘醌的氧化机理研究

Oxidation of Naphthol with Hydroperoxide Catalyzed by Metalloporphyrins(Ⅱ) ──Mechanism for Preparation of 2-Hydroxy-1,4-naphthaqinone

在低温碱性甲醇溶液中一氯化四苯基卟啉铁催化萘酚 H2 O2 氧化高选择性地制取 2 -羟基 -1 ,4-萘醌(HNQ) ,以 2 -萘酚和 1 -萘酚为底物时 HNQ的最高产率分别为 5 7%和 40 % (纯度 >95 % ) .根据金属卟啉催化氧化反应的特性 ,采用 UV-Vis和 EPR现场光谱监测催化剂和反应物的光谱变化 ,提出了羟基游离基加成反应机理 .

With hydrogen peroxide as oxidant, we got a high selectivity of 2\|hydroxy\|1,4\| naphthaqinone from 1\| and 2\|naphthol in methanol solution containing sodium hydroxide at low temperature. A series of tetraphenylporphyrin ferron chloride and its corresponding substitutes are employed as catalysts. By determination of UV\|Vis and EPR spectra \%in situ\%, a probable mechanism model was established.