反应详情

6-Amino-7-hydroxyindan-1-one hydrobromide (50 mg, 0.205 mmol) and triethyl orthoformate (128 μL, 0.769 mmol) were heated under reflux in tetrahydrofuran (2.5 mL) for 0.5 hr. The mixture was diluted with ethyl acetate, washed with saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (ethyl acetate/hexane=30/70→80/20) to give the title compound (21.9 mg, yield from Reference Example 362%).

1. washwashed with saturated brine
2. dry with materialdried over anhydrous sodium sulfate
3. customThe solvent was evaporated under reduced pressure
4. customthe residue was purified by silica gel column chromatography (ethyl acetate/hexane=30/70→80/20)