反应详情

Triethylamine (“TEA”) (0.741 mL, 5.31 mmol; d. 0.726) was added to a cold (0° C.) solution of 2-(tert-butyldimethylsilyloxy)-1-(4-chloro-3-fluorophenyl)ethanol (1.08 g, 3.54 mmol) in DCM (10 mL), followed by addition of methanesulfonyl chloride (0.329 mL, 4.25 mmol). After 1 hour, the reaction mixture was diluted with DCM, and the organic layer was washed with saturated aqueous NaHCO3, dried, filtered and concentrated to afford 2-(tert-butyldimethylsilyloxy)-1-(4-chloro-3-fluorophenyl)ethyl methanesulfonate (1.30 g, 3.39 mmol, 95.8% yield). 1H NMR (400 MHz, CDCl3) δ 7.33 (m, 1H), 7.18 (m, 1H), 7.10 (m, 1H), 6.63 (m, 1H), 5.74 (d, 1H), 5.32 (d, 1H).

1. washthe organic layer was washed with saturated aqueous NaHCO3
2. customdried
3. filtrationfiltered
4. concentrationconcentrated