Chlorotrimethylsilane → (2S,3R,4S,5S,6R)-2-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-2-methoxy-6-(trimethylsilyloxymethyl)tetrahydropyran-3,4,5-triol

(2S,3R,4S,5S,6R)-2-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-6-(hydroxymethyl)-2-methoxy-tetrahydropyran-3,4,5-triol 2g (1.31 g, 2.84 mmol) was dissolved in 15 mL pyridine, followed by addition of 4-dimethylamino pyridine (70 mg, 0.57 mmol) and trimethyl-chloro-silane (514 mg, 3.4 mmol). The reaction mixture was stirred for 16 hours and then concentrated under reduced pressure. The resulting residue was dissolved in 150 mL ethyl acetate and washed with pyridine (50 mL×2), water (30 mL) and saturated sodium chloride solution (30 mL) in turn. The organic extract was combined, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under reduced pressure to obtain the title compound (2S,3R,4S,5S,6R)-2-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-2-methoxy-6-(trimethylsilyloxymethyl)tetrahydropyran-3,4,5-triol 2h (1.63 g, pale yellow solid), yield: 100%.

1. concentrationconcentrated under reduced pressure
2. dissolutionThe resulting residue was dissolved in 150 mL ethyl acetate
3. washwashed with pyridine (50 mL×2), water (30 mL) and saturated sodium chloride solution (30 mL) in turn
4. extractionThe organic extract
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationThe filtrate was concentrated under reduced pressure

ORDレコード

ord-b9ad58315f97432082a56e155aeaf4b9

出典データセット

uspto-grants-2013_12

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08609622B2