反应详情

4′-(2-Ethoxyethoxy)-2′,6′-dimethylbiphenyl-3-carbaldehyde (2.39 g, 9.70 mmol) was dissolved in a mixture of 1,2-dimethoxyethane (20 mL) and tetrahydrofuran (20 mL), sodium borohydride (0.227 g, 6.00 mmol) was added under ice-cooling, and the mixture was stirred at the same temperature for 3 hr. Aqueous ammonium chloride solution was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (20%-50% ethyl acetate/hexane) to give the title compound (3.55 g, yield 98%) as colorless crystals.

1. additionwas added under ice-
2. temperaturecooling
3. extractionthe mixture was extracted with ethyl acetate
4. washThe extract was washed with saturated brine
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (20%-50% ethyl acetate/hexane)