反应详情

To a mixture of 40% dimethylamine (aqueous, 2.5 mL, 20 mmol) in THF (2.5 mL) added 4-bromo-2-methylbenzenesulfonyl chloride (0.27 g, 1.0 mmol) with stirring. After 5 h the reaction mixture was partitioned between DCM (50 mL) and water (50 mL), washed with water (2×50 mL) and brine (50 mL), dried (anhyd Na2SO4) and concentrated under reduced pressure to provide the title compound (0.28 g, quant) as a colorless liquid, which was used without purification in the next step. 1H-NMR (CDCl3) δ 7.74 (1H, d, J=8.3), 7.49 (1H, d, J=1.8), 7.46 (1H, dd, J=1.8, 8.3), 2.80 (6H, s), 2.60 (3H, s); Rf=0.38 (silica, 1:4 EtOAc/Hex).

1. customAfter 5 h the reaction mixture was partitioned between DCM (50 mL) and water (50 mL)
2. washwashed with water (2×50 mL) and brine (50 mL)
3. dry with materialdried (anhyd Na2SO4)
4. concentrationconcentrated under reduced pressure