Phosphorus oxychloride → 2',4'-Dicyano-p-toluenesulfonanilide
Reaction equation
P(Cl)(Cl)(Cl)=O.[C:6]([C:9]1[CH:25]=[C:24]([C:26](=O)[NH2:27])[CH:23]=[CH:22][C:10]=1[NH:11][S:12]([C:15]1[CH:20]=[CH:19][C:18]([CH3:21])=[CH:17][CH:16]=1)(=[O:14])=[O:13])(=O)[NH2:7]>O>[C:6]([C:9]1[CH:25]=[C:24]([C:26]#[N:27])[CH:23]=[CH:22][C:10]=1[NH:11][S:12]([C:15]1[CH:16]=[CH:17][C:18]([CH3:21])=[CH:19][CH:20]=1)(=[O:14])=[O:13])#[N:7]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 50 °C
Procedure
Phosphorus oxychloride (5.00 g) was added to 2′,4′-dicarbamoyl-p-toluenesulfonanilide (0.30 g (0.90 mmol), and the mixture was heated at 50° C. for 4 hours with stirring. After cooling, addition of water, and stirring brought about precipitation of an insoluble solid. These crystals were filtered, washed with water and recrystallized from ethyl acetate-hexane to give 0.16 g (60%) of 2′,4′-dicyano-p-toluenesulfonanilide as pale brown crystals.