反应详情

To a solution of (3,3-difluorocyclobutyl)methanol (500 mg, 4.09 mmol, 1.00 equiv), triethylamine (662.6 mg, 6.55 mmol, 1.60 equiv), and 4-dimethylaminopyridine (750 mg, 6.14 mmol, 1.50 equiv) in CH2Cl2 (5 mL) under argon at 0° C. was added 4-methylbenzene-1-sulfonyl chloride (1.01 g, 5.30 mmol, 1.30 equiv) in portions. The resulting mixture was stirred overnight at ambient temperature. The mixture was then diluted with H2O (20 mL) and extracted with EtOAc (3×20 mL). The combined organic layers were dried with anhydrous Na2SO4 and concentrated under reduced pressure. The crude residue was purified using flash column chromatography (silica gel, EtOAc/Hexanes (1:5)) to yield 1.1 g (97%) of a light yellow oil. 1H-NMR (300 MHz, CDCl3): δ ppm 7.77 (d, J=7.6 Hz, 2H), 7.34 (d, J=8.0 Hz, 2H), 4.03 (d, J=6.5 Hz, 2H), 2.75-2.50 (m, 2H), 2.50-2.36 (m, 4H), 2.36-2.08 (m, 2H).

1. extractionextracted with EtOAc (3×20 mL)
2. dry with materialThe combined organic layers were dried with anhydrous Na2SO4
3. concentrationconcentrated under reduced pressure
4. customThe crude residue was purified