反应详情

A solution of the compound (24.6 g, 102 mmol) obtained in Example 14-2) and potassium hydroxide (46 g, 820 mmol) in ethanol (200 ml) and water (40 ml) was heated to reflux for 7 h. The reaction mixture was cooled to room temperature, and then 5 N hydrochloric acid was added until the reaction mixture was rendered acidic. The deposited solid was collected by filtration, washed with water, and then dried to obtain the title compound (28.7 g, quant.) as a colorless solid.

1. temperatureto reflux for 7 h
2. filtrationThe deposited solid was collected by filtration
3. washwashed with water
4. customdried