Benzyl Bromide → HCID 86685127, compound

Participants

Reaction Steps

(2S,3R,4S,5S,6R)-6-[(tert-butyl(dimethyl)silyl)oxymethyl]-2-[4-chloro-3-[(4-ethoxy-3-fluoro-phenyl)methyl]phenyl]-2-methoxy-tetrahydropyran-3,4,5-triol 4g (7.14 g, 12.5 mmol) was dissolved in 100 mL N,N-dimethyl formamide, followed by addition of 60% NaH (2.5 g, 62.5 mmol) in an ice bath. The reaction mixture was warmed and stirred for 40 minutes at room temperature. The mixture was stirred for 16 hours after benzyl bromide (7.5 mL, 62.5 mmol) was added. Thereafter, the reaction mixture was concentrated under reduced pressure after 20 mL methanol were added. The residue was dissolved in 200 mL ethyl acetate and 50 mL water and partitioned. The aqueous phase was extracted with ethyl acetate (50 mL). The organic extracts were washed with water (50 mL), then saturated sodium chloride (50 mL), combined, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure to obtain the title compound [[(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[(4-ethoxy-3-fluoro-phenyl)methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methoxy]tert-butyl-dimethylsilane 4h (10.5 g, yellow grease), yield: 99.8%.

Provenance & Evidence