反应详情

A solution of (R)-1-(5-fluoro-2-methylphenyl)propan-2-ol (6.1 g, 36.3 mmol) and DIEA (12.6 mL, 72.6 mmol) in 200 mL anhydrous DCM was cooled in ice-water bath. Then methylsulfonyl chloride (3.4 mL, 43.5 mmol) was added slowly and the mixture was stirred for 30 min at rt. And then, saturated NaHCO3 solution (30 mL) was added to the solution and extracted with DCM, dried over anhydrous MgSO4, concentrated, passed through silicagel pad to give crude (R)-1-(5-fluoro-2-methylphenyl)propan-2-yl methanesulfonate (F-2).

1. extractionextracted with DCM
2. dry with materialdried over anhydrous MgSO4
3. concentrationconcentrated