反应详情

To a solution of (S)-tert-butyl 4-((R)-5-hydroxy-2-(tosyloxymethyl)pentyl)-2,2-dimethyloxazolidine-3-carboxylate (254 mg, 0.54 mmol) in anhydrous DMF (8 mL) at 0° C. under N2 was added NaH (43 mg, 1.08 mmol). After stirring at this temperature for 1 hr, the reaction was quenched with aq. NH4Cl and then evaporated to dryness. The residue was dissolved in EtOAc and H2O, the separated aqueous phase was extracted with EtOAc. The combined organic phases were washed with H2O, brine, and dried over Na2SO4, filtered, and evaporated. The residue was purified on silica gel column to afford (S)-tert-butyl 2,2-dimethyl-4-(((R)-tetrahydro-2H-pyran-3-yl)methyl)oxazolidine-3-carboxylate (136 mg, 84%).

1. customthe reaction was quenched with aq. NH4Cl
2. customevaporated to dryness
3. dissolutionThe residue was dissolved in EtOAc
4. extractionH2O, the separated aqueous phase was extracted with EtOAc
5. washThe combined organic phases were washed with H2O, brine
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. customevaporated
9. customThe residue was purified on silica gel column