反应详情

4-Aminobenzonitrile (98%, 500.0 g (4.15 mol) was dissolved in a mixed solvent of pyridine (360 ml) and acetonitrile (900 ml). To this, p-toluenesulfonyl chloride (872.3 g (4.44 mol)) was added with stirring at room temperature. After stirring for 16 hours at room temperature, water (4000 ml) was added to the reaction mixture to bring about separation of crystals. The crystals were filtered and washed with water to give 1153 g (98%) of 4′-cyano-p-toluenesulfonanilide as pale red crude crystals.

1. stirringAfter stirring for 16 hours at room temperature
2. customto bring about separation of crystals
3. filtrationThe crystals were filtered
4. washwashed with water