反应详情

N-methylmorpholine N-oxide (2.7 g, 23 mmol) was added to a suspension of Compound 3 (4.55 g, 23 mmol) in 50 mL of acetone/water (10:1) at 0° C. After 7 min OsO4 (1.048 mL, 0.092 mmol) was added slowly. The solution was stirred 36 h at room temperature, and then the solvent was evaporated in vacuo. It was acidified with dilute hydrochloric acid and extracted with ethyl acetate. The filtrate was concentrated to yield the corresponding compound 4 (5.1 g, yield 85.2%).

1. customthe solvent was evaporated in vacuo
2. extractionextracted with ethyl acetate
3. concentrationThe filtrate was concentrated