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Abstract
α-Tocopherol model compound, 2,2,5,7,8-pentamethyl-6-hydroxychroman was oxidized under oxygen bubbling. Four oxidation products of 2-(γ,γ-dimethylallyl)-3,5,6-trimethyl-1,4-benzoquinone (B), 2,2,7,8-tetramethyl-5-formyl-6-hydroxychroman (C), trimer (D) and tocopherylethane (G) were identified, and spirodimer (E) was tentatively identified by TLC. Two of them, (B) and (C) have not been obtained in the oxidation of α-tocopherol model compound with p-quinone, alkaline ferricyanide and other compounds as oxidizing agent. A scheme of oxidation mechanism of α-tocopherol model compound was also proposed.
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