反应详情

The compound (1.6 g) obtained in Example 50 was suspended in a mixture of ethanol (20 mL) and tetrahydrofuran (15 mL), and 1N aqueous sodium hydroxide (5.9 mL) was added at room temperature, followed by stirring for 12 hours at the same temperature. After adding 1N hydrochloric acid (5.9 mL), the solvent was distilled away under reduced pressure, and the residue was washed with water and diethyl ether to give the title compound (1.19 g).

1. additionwas added at room temperature
2. distillationthe solvent was distilled away under reduced pressure
3. washthe residue was washed with water and diethyl ether