反应详情

(2S,3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[3-[[5-(4-fluorophenyl)-2-thienyl]methyl]-4-methyl-phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-carbaldehyde 91 (2.0 g, 2.1 mmol) was dissolved in 30 mL of mixed solution (THF and MeOH, v:v=1:20), followed by addition of sodium borohydride (238 mg, 6.3 mmol) in batch. 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 systems B and E to obtain the title compound [(3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[3-[[5-(4-fluorophenyl)-2-thienyl]methyl]-4-methyl-phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-yl]methanol 9j (420 mg, pale yellow solid), yield: 25.8%. 1H NMR (400 MHz, CD3OD): δ 7.55 (d, 2H), 7.48-7.45 (m, 3H), 7.32-7.28 (m, 5H), 7.25-7.21 (m, 9H), 7.16 (d, 2H), 7.07-7.03 (m, 3H), 6.63 (d, 1H), 4.91 (d, 1H), 4.83 (d, 1H), 4.75 (d, 1H), 4.54 (d, 1H), 4.26-4.17 (m, 2H), 4.10-4.04 (m, 5H), 3.94 (d, 1H), 3.78 (d, 1H), 3.36 (d, 1H), 3.26 (s, 3H), 2.34 (s, 3H).

1. concentrationThereafter, the reaction mixture was concentrated under reduced pressure
2. customthe resulting residue was purified by silica gel chromatography with elution systems B and E