反应详情

Sodium borohydride (132 mg) was added to a solution of methyl 3′-formylbiphenyl-4-carboxylate (720 mg), which is the product of Reference example 14(a), in ethanol (50 ml) at ambient temperature. The mixture was stirred under an atmosphere of nitrogen for 50 minutes. The reaction mixture was quenched with 50% acetic acid and concentrated under reduced pressure. The residue was partitioned between ethyl acetate and water and the layers were separated. The ethyl acetate layer was washed with saturated aqueous sodium chloride solution and dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was crystallized from diisopropyl ether to afford the desired compound (522 mg) as colorless crystals.

1. customat ambient temperature
2. customThe reaction mixture was quenched with 50% acetic acid
3. concentrationconcentrated under reduced pressure
4. customThe residue was partitioned between ethyl acetate and water
5. customthe layers were separated
6. washThe ethyl acetate layer was washed with saturated aqueous sodium chloride solution
7. dry with materialdried over anhydrous magnesium sulfate
8. concentrationconcentrated under reduced pressure
9. customThe residue was crystallized from diisopropyl ether