反应详情

To a solution (300 ml) of 6-(12-acetoxydodecyl)-2,3-dimethoxy-5-methylphenol (6.1 g) in dimethylformamide are added potassium nitrosodisulfonate (18 g), water (300 ml), methanol (50 ml) and potassium dihydrogen phosphate (0.5 g), and the mixture is stirred at room temperature for 30 days. The product is extracted with dichloromethane, and the organic layer is washed with water and dried over anhydrous magnesium sulfate. The solvent is distilled off to give crude crystals. This product is recrystallized from hexane to give orange-yellow needles of 6-(12-acetoxydodecyl)-2,3-dimethoxy-5-methyl-1,4-benzoquinone (4.8 g). m.p. 47° C.

1. extractionThe product is extracted with dichloromethane
2. washthe organic layer is washed with water
3. dry with materialdried over anhydrous magnesium sulfate
4. distillationThe solvent is distilled off
5. customto give crude crystals
6. customThis product is recrystallized from hexane