反应详情

[[(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2,2-trifluoroethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methoxy]tert-butyl-dimethyl-silane 7g (4.19 g, 4.78 mmol) was dissolved in 30 mL methanol, followed by addition of acetyl chloride (51 μL, 0.72 mmol). The reaction mixture was stirred for 1 hour. Thereafter, the reaction mixture was concentrated under reduced pressure and the resulting residue was purified by silica gel chromatography with elution system D to obtain the title compound [(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2,2-trifluoroethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methanol 7h (1.1 g, white grease), yield: 30.1%. 1H NMR (400 MHz, DMSO-d6): δ 7.55-7.43 (m, 2H), 7.39-7.28 (m, 6H), 7.28-7.16 (m, 9H), 7.11-7.03 (m, 1H), 7.01 (dd, 2H), 6.90 (d, 2H), 4.91-4.73 (m, 4H), 4.73-4.58 (m, 3H), 4.42 (d, 1H), 4.17-3.87 (m, 4H), 3.83-3.62 (m, 4H), 3.53 (dd, 1H), 3.24 (d, 1H), 3.08-2.86 (m, 3H).

1. concentrationThereafter, the reaction mixture was concentrated under reduced pressure
2. customthe resulting residue was purified by silica gel chromatography with elution system D