反应详情

To a solution (400 ml) of 6-(11-acetoxyundecyl)-2,3-dimethoxy-5-methylphenol (8 g) in dimethylformamide are added potassium nitrosodisulfonate (24 g), water (400 ml), methanol (30 ml) and potassium dihydrogen phosphate (1.0 g), and the mixture is stirred at room temperature for 28 days. The product is extracted with dichloromethane and the dichloromethane layer is washed with water and then dried over anhydrous magnesium sulfate. Removal of the solvent by distillation gives crude crystals. Recrystallization from hexane yields orange-yellow needles of 6.4 g of 6-(11-acetoxyundecyl)-2,3-dimethoxy-5-methyl-1,4-benzoquinone. m.p. 41° C.

1. extractionThe product is extracted with dichloromethane
2. washthe dichloromethane layer is washed with water
3. dry with materialdried over anhydrous magnesium sulfate
4. customRemoval of the solvent
5. distillationby distillation
6. customgives crude crystals
7. customRecrystallization from hexane