反应详情

温度

100 °C

16 mg (0.041 mmol) of Compound 137 obtained in Example 137 was dissolved in 3 mL of ethanol, 3 mL of 50% sulfuric acid was added and the mixture was stirred at 100° C. for 1 hour. The reaction solution was cooled on ice, water was added and the mixture was extracted twice with ethyl acetate. The organic layer was washed once with an aqueous saturated solution of sodium bicarbonate, once with water and once with an aqueous saturated solution of sodium chloride and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure to give 14 mg of Compound 138 (yield: 84%).

1. additionwas added
2. extractionthe mixture was extracted twice with ethyl acetate
3. washThe organic layer was washed once with an aqueous saturated solution of sodium bicarbonate, once with water and once with an aqueous saturated solution of sodium chloride
4. dry with materialdried over anhydrous sodium sulfate
5. distillationThe solvent was distilled off under reduced pressure