反应详情

To a solution of 3-(β-D-glucopyranosyloxy)-4-(2-hydroxybenzyl)-5-isopropyl-1H-pyrazole (150 mg) in N,N-dimethylformamide (1 mL) were added 3-bromomethylphenyl acetate (131 mg) and potassium carbonate (105 mg), and the mixture was stirred at room temperature for 13 hours. The reaction mixture was poured into water, and the resulting mixture was extracted with ethyl acetate. The organic layer was washed with water and dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: dichloromethane/methanol=10/1˜5/1) to give 4-[2-(3-acetyloxybenzyloxy)benzyl]-3-(β-D-glucopyranosyloxy)-5-isopropyl-1H-pyrazole. To a solution of 4-[2-(3-acetyloxybenzyloxy)benzyl]-3-(β-D-glucopyranosyloxy)-5-isopropyl-1H-pyrazole (12 mg) in methanol (2 mL) was added sodium methoxide (28% methanol solution, 5 μL), and the mixture was stirred at room temperature for 1 hour. The reaction mixture was concentrated under reduced pressure, and the residue was purified by solid phase extraction on ODS (washing solvent: distilled water, eluent: methanol) to give the title compound (8 mg).

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. distillationthe residue was purified by solid phase extraction on ODS (washing solvent: distilled water, eluent: methanol)