反应详情

0.62 g (3.5 mmol) of ascorbic acid was dissolved in concentrated sulfuric acid (16 mL). After addition of 1.0 g (3.5 mmol) of methyl 5,9,13-trimethyltetradec-4-enoate, the mixture was stirred for 24 hours at room temperature. The reaction mixture was poured into iced water, and extracted with ethyl acetate. The extract was washed with water, 1M hydrochloric acid, saturated sodium bicarbonate aqueous solution, and saturated brine, successively, and dried over anhydrous sodium sulfate. After filtration, the filtrate was concentrated, and the resulting residue was purified by silica gel column chromatography (methanol/methylene chloride mixture) to obtain the title compound.

1. extractionextracted with ethyl acetate
2. washThe extract was washed with water, 1M hydrochloric acid, saturated sodium bicarbonate aqueous solution, and saturated brine
3. dry with materialsuccessively, and dried over anhydrous sodium sulfate
4. filtrationAfter filtration
5. concentrationthe filtrate was concentrated
6. customthe resulting residue was purified by silica gel column chromatography (methanol/methylene chloride mixture)