反应详情

A solution of 1A (600 mg, 1.78 mmol) in THF (30 mL) and MeOH (10 mL) was treated with a solution of LiOH monohydrate (375 mg, 8.93 mmol) in water (10 mL) at room temperature. The resulting suspension was stirred at room temperature for 18 hours. The reaction was concentrated to 30 mL, diluted with water (50 mL) and cooled to 0° C. The solution was brought to pH 5 with 1 N HCl and the resulting solid was collected by vacuum filtration. Residual water was removed from the solid material using azeotrope with toluene to afford 1B as a white solid (370 mg, 65%).

1. concentrationThe reaction was concentrated to 30 mL
2. additiondiluted with water (50 mL)
3. temperaturecooled to 0° C
4. filtrationthe resulting solid was collected by vacuum filtration
5. customResidual water was removed from the solid material