反应详情

2.6 M n-butylithium hexane solution (0.8 mL) was added to a mixture of 1-bromo-4-(4-tetrahydropyranyloxy)benzene (0.545 g, 2.12 mmol) and tetrahydrofuran (6 mL) at −78° C. After stirred for 1.5 hours, a tetrahydrofuran (8 mL) solution of 2,3,4,6-tetra-O-benzyl-1-C-(3-formylphenyl)-5-thio-D-glucopyranose (0.70 g, 1.06 mmol) was added and further stirred for three hours, and the reaction mixture was warmed to room temperature. After the reaction mixture was added with a saturated ammonium chloride aqueous solution and extracted with ethyl acetate, the organic phase was washed with brine and dried with anhydrous magnesium sulfate. After the desiccant was filtered off, the residue obtained by evaporating the solvent under reduced pressure was purified by silica gel column chromatography (hexane:ethyl acetate=2:1) to obtain 2,3,4,6-tetra-O-benzyl-1-C-[3-[(4-(4-tetrahydropyranyloxy)phenyl)(hydroxy)methyl]phenyl]-5-thio-D-glucopyranose (0.67 g, 76%).

1. stirringfurther stirred for three hours
2. extractionextracted with ethyl acetate
3. washthe organic phase was washed with brine
4. dry with materialdried with anhydrous magnesium sulfate
5. filtrationAfter the desiccant was filtered off
6. customthe residue obtained
7. customby evaporating the solvent under reduced pressure
8. customwas purified by silica gel column chromatography (hexane:ethyl acetate=2:1)