反应详情

To a solution of o-phenylenediamine (4 mmol) in DCM (20 mL) and pyridine (4 mL) at 0° C., 4-chlorobenzenesulfonyl chloride (4.4 mmol) was added in small portions. The reaction mixture was then gradually warmed to RT with stirring continued until the reaction was complete as determined by TLC or LC-MS. The reaction mixture was then diluted with DCM (20 mL). The organic phase was washed with water (2×20 mL) and 20 mL of brine. The organic phase was dried over anhydrous sodium sulfate and concentrated under vacuum. The residue obtained was purified by flash column chromatography eluting with DCM/EtOAc to give 960 mg of N-(2-aminophenyl)-4-chlorobenzenesulfonamide. LC: Tr 0.92 min, MS: 284.0 (M+1)+.

1. washThe organic phase was washed with water (2×20 mL) and 20 mL of brine
2. dry with materialThe organic phase was dried over anhydrous sodium sulfate
3. concentrationconcentrated under vacuum
4. customThe residue obtained
5. customwas purified by flash column chromatography
6. washeluting with DCM/EtOAc