反应详情

(2S,3R,4S,5S,6R)-2-[4-chloro-3-[[4-[2-(cyclopropoxy)ethoxy]phenyl]methyl]phenyl]-6-(hydroxymethyl)-2-methoxy-tetrahydropyran-3,4,5-triol 1a (Prepared according to the method in WO2010022313) (3.0 g, 6.06 mmol) was dissolved in 20 mL pyridine, followed by addition of 4-dimethylamino pyridine (148 mg, 1.21 mmol) and TBSCl (1.1 g, 7.27 mmol) in turn. The reaction mixture was stirred for 16 hours, then concentrated under reduced pressure. The residue was dissolved in 100 mL ethyl acetate and 100 mL water and partitioned. The aqueous phase was extracted with ethyl acetate (100 mL), and the organic layer was washed with water (50 mL), combined, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography with elution system A to obtain the title compound (2S,3R,4S,5S,6R)-6-[(tert-butyl(dimethyl)silyl)oxymethyl]-2-[4-chloro-3-[[4-[2-(cyclopropoxy)ethoxy]phenyl]methyl]phenyl]-2-methoxy-tetrahydropyran-3,4,5-triol 1b (3.0 g, yellow solid), yield: 81.1%. 1H NMR (400 MHz, CD3OD): δ 7.50 (dd, 1H), 7.38 (m, 2H), 7.08 (d, 2H), 6.82 (d, 2H), 4.04 (m, 5H), 3.88 (m, 1H), 3.82 (m, 2H), 3.75 (m, 1H), 3.59 (m, 1H), 3.40 (m, 2H), 3.07 (m, 1H), 3.06 (s, 3H), 0.90 (s, 9H), 0.53 (m, 4H), 0.10 (s, 3H), 0.07 (s, 3H).

1. concentrationconcentrated under reduced pressure
2. dissolutionThe residue was dissolved in 100 mL ethyl acetate
3. custom100 mL water and partitioned
4. extractionThe aqueous phase was extracted with ethyl acetate (100 mL)
5. washthe organic layer was washed with water (50 mL)
6. dry with materialdried over anhydrous magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customThe resulting residue was purified by silica gel chromatography with elution system