反应详情

To a solution of the compound (0.15 g) obtained in Example 1B (1) in pyridine (6 ml) were added acetic anhydride (0.20 g) and 4-dimethylaminopyridine (0.05 g), and the mixture was stirred at room temperature for 14 hrs. The solvent was evaporated, and the residue was purified by silica gel column chromatography and recrystallized from hexane-ethyl acetate to give the title compound (0.11 g) as colorless crystals.

1. customThe solvent was evaporated
2. customthe residue was purified by silica gel column chromatography
3. customrecrystallized from hexane-ethyl acetate