反应详情

To a solution of 6-(20-hydroxyeicosyl)-2,3-dimethoxy-5-methylphenol (2.3 g) in dimethylformamide (1.5 l) are added potassium nitrosodisulfonate (30 g), water (1.5 l), methanol (300 ml) and monopotassium phosphate (1.3 g) and the mixture is stirred at room temperature for 45 days. The reaction mixture is extracted with dichloromethane and recrystallized from ether. The above procedure gives 6-(20-hydroxyeicosyl)-2,3-dimethoxy-5-methyl-1,4-benzoquinone (1.3 g) as yellow needles. Melting point: 85° C.

1. extractionThe reaction mixture is extracted with dichloromethane
2. customrecrystallized from ether