Acetyl chloride → [(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methanol

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Reaction Steps

[[(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methoxy]trimethylsilane 21 (2.4 g, 2.84 mmol) was dissolved in 20 mL methanol and stirred for 1 hour after addition of acetyl chloride (30 μL, 0.43 mmol). The reaction mixture was concentrated under reduced pressure and the resulting residue was purified by silica gel chromatography with elution system B to obtain the title compound [(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-6-meth oxy-tetrahydropyran-2-yl]methanol 2j (1.25 g, yellow solid), with yield: 60.4%.

Provenance & Evidence