反应详情

温度

-55 °C

To a stirred solution of (2S,3R,4S,5S,6R)-2-[3-(1-benzyl-1,2,3,4-tetrahydro-quinolin-7-ylmethyl)-4-isopropyl-phenyl]-6-hydroxymethyl-2-methoxy-tetrahydro-pyran-3,4,5-triol (1.20 g, 2.19 mmol) in acetonitrile-dichloroethane 1:1 (20 mL) was added triethylsilane (1.39 mL, 8.76 mmol) at room temperature, then the reaction mixture cooled to −50 to −60° C. and boron trifluoride diethyletharate complex (0.55 mL, 4.38 mmol) was added dropwise, and the reaction mixture was stirred at same temperature and allowed to stir at below −30° C. for 2 hours and at −20° C. for 1 hour and then below 0° C. for 1 hour. The reaction was quenched with aq. saturated NaHCO3 solution (20 mL). The volatiles were evaporated under reduced pressure, and the resulting mixture was extracted with ethyl acetate (3×20 mL). The organic layers were combined and washed with brine (5 mL), dried over sodium sulphate, and concentrated to furnish (2S,3R,4R,5S,6R)-2-[3-(1-Benzyl-1,2,3,4-tetrahydro-quinolin-7-ylmethyl)-4-isopropyl-phenyl]-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol (1.0 g). Crude product was used for next step without purification.

1. stirringto stir at below −30° C. for 2 hours and at −20° C. for 1 hour
2. customThe reaction was quenched with aq. saturated NaHCO3 solution (20 mL)
3. customThe volatiles were evaporated under reduced pressure
4. extractionthe resulting mixture was extracted with ethyl acetate (3×20 mL)
5. washwashed with brine (5 mL)
6. dry with materialdried over sodium sulphate
7. concentrationconcentrated