反应详情

温度

0 °C

(4′-((tert-Butyldimethylsilyl)oxy)-2′,6′-dimethylbiphenyl-3-yl)methanol 3f (1.19 g, 3.48 mmol), methyl (S)-2-(6-hydroxyl-2,3-dihydrobenzofuran-3-yl)acetate (660 mg, 3.17 mmol) and triphenylphosphine (1.34 g, 4.75 mmol) were dissolved in 10 mL of dichloromethane. The reaction solution was cooled down to 0° C., followed by addition of diisopropyl azodicarboxylate (960 mg, 4.75 mmol), then warmed up to room temperature and stirred for 4 hours. The resulting solution was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography with elution system B to obtain the title compound (S)-methyl 2-(6-((4′-((tert-butyldimethylsilyl)oxy)-2′,6′-dimethylbiphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate 3 g (1.28 g, yield 76.0%) as a white solid.

1. temperaturewarmed up to room temperature
2. concentrationThe resulting solution was concentrated under reduced pressure
3. customthe residue was purified by silica gel column chromatography with elution system B