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9552189 
Journal Article 
Oxidation of α-tocopherol with dioxane dibromide 
Witkowski, S; Popławski, J 
1996 
1 
Polish Journal of Chemistry
ISSN: 0137-5083 
70 
11 
1448-1452 
English 
α-Tocopherol 1a was oxidized by dioxane dibromide to 5-bromomethyl-γ-tocopherylquinone 2b. The quinone 2b undergoes a spontaneous cyclization to 5-formyl-γ-tocopherol 4. A mechanism of brominative oxidation and cyclization was proposed. 
α-tocopherol; Dioxane dibromide; Oxidation; Synthesis