反应详情

The above 18-acetoxy compound was deacetylated by the corresponding procedure of Reference Example 2 and the resultant 6-(18-hydroxyoctadecyl)-2,3-dimethoxy-5-methylphenol (0.5 g) is dissolved in dimethylformamide (1 l). To this solution is added potassium nitrosodisulfonate (13 g), 700 ml of water, 100 ml of methanol and monopotassium phosphate (1 g), and the mixture is stirred at room temperature for 45 days. The product is extracted in the conventional manner and recrystallized from ether-hexane. The above procedure yields 6-(18-hydroxyoctadecyl)-2,3-dimethoxy-5-methyl-1,4-benzoquinone (V, n=17) as yellow needles (0.31 g), m.p. 81° C.

1. extractionThe product is extracted in the conventional manner
2. customrecrystallized from ether-hexane