反应详情

In 80 m of DMF were poured 13.1 g (78.0 mmol) of methyl 2,4-dihydroxybenzoate and 18.9 g (86.9 mmol) of potassium carbonate, and 12.0 g (86.9 mmol) of geranyl bromide was added thereto dropwise at 5° C. After the addition, the mixture was stirred at room temperature for 1 hour, poured into 300 ml of water, and extracted with 250 ml of ethyl acetate. The extract was washed with water and a saturated sodium chloride aqueous solution, dried over sodium sulfate, and concentrated. The resulting crude product was purified by column chromatography to obtain 18.1 g (yield: 75%) of methyl 4-{(2E)-3,7-dimethylocta-2,6-dienyloxy}-2-hydroxybenzoate represented by the following chemical formula (hereinafter referred to as compound 31) as a colorless, clear and oily substance. The analytical results are shown below. ##STR52##

1. additionwas added
2. customdropwise at 5° C
3. additionAfter the addition
4. extractionextracted with 250 ml of ethyl acetate
5. washThe extract was washed with water
6. dry with materiala saturated sodium chloride aqueous solution, dried over sodium sulfate
7. concentrationconcentrated
8. customThe resulting crude product was purified by column chromatography