反应详情

To (R)-(tetrahydrofuran-2-yl)methanol (1.0 g, 9.8 mmol) in CH2Cl2 (3 mL) and pyridine (3 mL) at ambient temperature was added 4-methylbenzene-1-sulfonyl chloride (2.0 g, 10.3 mmol) portion-wise over 5 minutes. This mixture was stirred for 16 hours at ambient temperature then was quenched with 10 mL of 5% aqueous HCl and was extracted with 3×5 mL CH2Cl2. The combined organics were dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure. The crude material was purified by column chromatography (SiO2, 75% hexanes in ethyl acetate) to give the title compound (1.7 g, 6.8 mmol, 69% yield). MS (DCI/NH3) m/z 257 (M+H)+ and 274 (M+NH4)+.

1. customthen was quenched with 10 mL of 5% aqueous HCl
2. extractionwas extracted with 3×5 mL CH2Cl2
3. dry with materialThe combined organics were dried over anhydrous Na2SO4
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure
6. customThe crude material was purified by column chromatography (SiO2, 75% hexanes in ethyl acetate)