反应详情

Into a 20 mL scintillation vial were added 3-Bromobenzenesulfonyl chloride (0.301 g, 1.179 mmol) and anhydrous pyridine (5 mL). A 2M solution of dimethylamine in THF (1.0 mL, 2.0 mmol) was added dropwise, and the reaction mixture was stirred at rt under N2 for 5 h after which it was concentrated under vacuum. The crude residue was partitioned between EtOAc and 1M citric acid. The layers were separated, and the organic phase was washed 3× with 1M citric acid, then treated with brine, dried (Na2SO4), filtered and concentrated. Trituration with Et2O provided 3-Bromo-N,N-dimethyl-benzenesulfonamide as a white powder (0.297 g, 96%). MS: m/z 263.9/265.9 [MH+].

1. concentrationwas concentrated under vacuum
2. customThe crude residue was partitioned between EtOAc and 1M citric acid
3. customThe layers were separated
4. washthe organic phase was washed 3× with 1M citric acid
5. additiontreated with brine
6. dry with materialdried (Na2SO4)
7. filtrationfiltered
8. concentrationconcentrated