反应详情

To a solution of 4-(3-chloropropoxy)benzaldehyde (30 g) in methanol (250 mL), cooled at a temperature close to 0° C., is added portionwise sodium borohydride (7.72 g). The mixture is stirred for 4 hours, hydrolysed with a saturated aqueous solution of ammonium chloride and extracted with diethyl ether. The combined extracts are dried over magnesium sulphate, concentrated under reduced pressure and purified by chromatography over silica gel (eluent: dichloromethane/methanol from 100/0 to 95/5). Fractions containing the expected product are pooled and concentrated under reduced pressure to give 11.1 g of 4-(3-chloropropoxy)benzyl alcohol as a white solid used without further purification.

1. customclose to 0° C.
2. extractionextracted with diethyl ether
3. dry with materialThe combined extracts are dried over magnesium sulphate
4. concentrationconcentrated under reduced pressure
5. custompurified by chromatography over silica gel (eluent: dichloromethane/methanol from 100/0 to 95/5)
6. additionFractions containing the expected product
7. concentrationconcentrated under reduced pressure