反应详情

温度

0 °C

Sodium borohydride (0.28 g, 6.9 mmol) was added to a THF solution (30 ml) of 5-bromo-2-hydroxy-3-methoxybenzaldehyde (3.2 g 13.8 mmol) under ice cooling and the mixture was stirred at 0° C. for 2 hours. Acetic acid was added to the reaction solution to set pH at 3. 10% hydrochloric acid was added to the reaction mixture, which was then extracted with ethyl acetate. The extracted material was dried over magnesium sulfate and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=5:1→1:1) and concentrated to dryness under reduced pressure to obtain 4-bromo-2-hydroxymethyl-6-methoxyphenol (3.23 g) as light yellow oil.

1. extractionwas then extracted with ethyl acetate
2. dry with materialThe extracted material was dried over magnesium sulfate
3. concentrationconcentrated under reduced pressure
4. customThe obtained residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=5:1→1:1)
5. concentrationconcentrated to dryness under reduced pressure