反应详情

1-Amino-4-methylbenzene (1.821 g, 17.0 mmol) was dissolved in DCM (25 mL). N,N-Diisopropylethylamine (3.1 mL, 18.1 mmol) and 4-ethoxy-benzenesulfonyl chloride (2.50 g, 11.3 mmol) were added successively. The reaction mixture was stirred at room temperature overnight and then washed with 10% HCl (2×20 mL) and brine (1×20 mL). Organic phase was dried with sodium sulfate before filtering and removal of solvent. The desired product, e.g. 4-ethoxy-N-(4-methylphenyl)benzenesulfonamide (3.087 g, 94%), was obtained as a colorless solid, in 99.2% purity by HPLC (MaxPlot detection between 230 and 400 nm).

1. washwashed with 10% HCl (2×20 mL) and brine (1×20 mL)
2. dry with materialOrganic phase was dried with sodium sulfate
3. filtrationbefore filtering
4. customremoval of solvent