反应详情

To a solution of 6-(11-acetoxyundecyl)-2,3-dimethoxy-5-methylphenol (8 g) in dimethylformamide (400 ml) are added potassium nitrosodisulfonate (24 g), water (400 ml), methanol (30 ml) and monopotassium phosphate (1.0 g). The mixture is stirred at room temperature for 28 days. The reaction product is extracted with dichloromethane and the dichloromethane layer is washed with water and dried over magnesium sulfate. The solvent is distilled off to thereby leave crude crystals. The crude crystals are recrystallized from hexane to yield 6.4 g of 6-(11-acetoxyundecyl)-2,3-dimethoxy-5-methyl-1,4-benzoquinone as orange-yellow needles, m.p.: 41° C.

1. extractionThe reaction product is extracted with dichloromethane
2. washthe dichloromethane layer is washed with water
3. dry with materialdried over magnesium sulfate
4. distillationThe solvent is distilled off
5. customto thereby leave crude crystals
6. customThe crude crystals are recrystallized from hexane