反应详情

To a solution of pentan-1-ol (9.2 mL, 85 mmol) in CH2Cl2 (70 mL) and pyridine (50 mL) was added 4-(dimethylamino)pyridine (0.52 g, 4.3 mmol) followed by p-toluenesulfonyl chloride (16.2 g, 85 mmol). The mixture was allowed to stir at ambient temperature for 18 h then was quenched with 5% aqueous HCl (10 mL) and the layers were separated. The aqueous phase was extracted with CH2Cl2 (3×5 mL). The combined organic extracts were dried over Na2SO4, filtered and concentrated under reduced pressure. Purification by column chromatography (SiO2, 75% hexanes in EtOAc) afforded the title compound (13.1 g, 53.9 mmol, 63% yield). MS (DCI/NH3) m/z 260 (M+NH4)+.

1. customthen was quenched with 5% aqueous HCl (10 mL)
2. customthe layers were separated
3. extractionThe aqueous phase was extracted with CH2Cl2 (3×5 mL)
4. dry with materialThe combined organic extracts were dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customPurification by column chromatography (SiO2, 75% hexanes in EtOAc)