反应详情

To a solution of diol compound 9 (2.28 g, 10 mmol) in N,N-dimethyl formamide (50 mL) at 0° C. was added sequentially imidazole (1.63 g, 24 mmol), and t-butyldimethylsilyl chloride (1.65 g, 11 mmol), and the reaction mixture was stirred for 2 h. After completion of the reaction (TLC). The mixture was diluted with ethyl acetate (200 mL), washed with water (2×50 mL), dried and concentrated to give a colorless oil, which after purification by flash chromatography, afforded the pure monosilyl compound 10 as an oil (Rf 0.71, silica, ethyl acetate and hexane, 1:10, 2.80 g, 84%).

1. customAfter completion of the reaction (TLC)
2. washwashed with water (2×50 mL)
3. customdried
4. concentrationconcentrated
5. customto give a colorless oil, which
6. customafter purification by flash chromatography