反应详情

To a solution of 1-(2,3-dimethyl-2H-indazol-5-yl)-4-hydroxypyridin-2(1H)-one (150 mg) in tetrahydrofuran (3 ml) were added (4-bromophenyl)methanol (110 mg), bis(2-methoxyethyl)azodicarboxylate (179 mg) and triphenylphosphine (200 mg) at room temperature, and the mixture was stirred at the same temperature for 17 hr. To the reaction mixture was added water, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate) and recrystallized from ethyl acetate to give the title compound (98 mg).

1. extractionthe mixture was extracted with ethyl acetate
2. washThe organic layer was washed with water and saturated brine
3. dry with materialdried over anhydrous magnesium sulfate
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate)
6. customrecrystallized from ethyl acetate