Trifluoroacetic acid → [(1S,2S,3S,4R,5S)-2,3,4-tribenzyloxy-5-[4-chloro-3-[[4-(2,2-difluoroethoxy)phenyl]methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octan-1-yl]methanol

Participants

Reaction Steps

[(3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2-difluoroethoxy)phenyl]methyl]phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-yl]methanol 12k (293 mg, 0.38 mmol) was dissolved in 10 mL dichloromethane, followed by dropwise addition of trifluoroacetic acid (0.1 mL). The reaction mixture was stirred for 1 hour. Thereafter, the reaction mixture was concentrated under reduced pressure and the resulting residue was purified by column chromatography to obtain the title compound [(1S,2S,3S,4R,5S)-2,3,4-tribenzyloxy-5-[4-chloro-3-[[4-(2,2-difluoroethoxy)phenyl]methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octan-1-yl]methanol 12m (76 mg, white solid), yield: 27.6%.

Provenance & Evidence