反应详情

The compound (0.20 g) obtained in Step 1 was dissolved in a mixture of ethanol (3 mL) and tetrahydrofuran (2.75 mL) and to this solution was added sodium borohydride (0.016 g) under cooling with ice-water and the mixture was stirred at the same temperature for two hours under nitrogen atmosphere. After adding water (15 mL) and stirring, to the mixture was added salt until it was saturated, and the mixture was extracted with ethyl acetate. The organic layer was washed with brine and dried over anhydrous sodium sulfate, and the solvent was removed under reduced pressure. The obtained residue was purified by silica gel column chromatography (Chromatorex NH™) (eluent; ethyl acetate:methanol=99:1 to 9:1) to obtain the titled compound (0.16 g).

1. stirringstirring, to the mixture
2. additionwas added salt until it
3. extractionthe mixture was extracted with ethyl acetate
4. washThe organic layer was washed with brine
5. dry with materialdried over anhydrous sodium sulfate
6. customthe solvent was removed under reduced pressure
7. customThe obtained residue was purified by silica gel column chromatography (Chromatorex NH™) (eluent; ethyl acetate:methanol=99:1 to 9:1)