Urea → N-(Carbamoylcarbamothioyl)-4-chlorobenzamide
Reaction equation
[Cl:1][C:2]1[CH:12]=[CH:11][C:5]([C:6]([N:8]=[C:9]=[S:10])=[O:7])=[CH:4][CH:3]=1.[NH2:13][C:14]([NH2:16])=[O:15]>CC(C)=O>[C:14]([NH:16][C:9]([NH:8][C:6](=[O:7])[C:5]1[CH:11]=[CH:12][C:2]([Cl:1])=[CH:3][CH:4]=1)=[S:10])(=[O:15])[NH2:13]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
4-Chlorobenzoyl isothiocyanate (395 mg) and 600 mg urea (5 equiv) were mixed in 30 mL of acetone and stirred at reflux for 1 day. The reaction was concentrated and the residue slurried in diethyl ether. The residue was collected by filtration and washed with diethyl ether. The white solid was dissolved in ethyl acetate (10 ml) and the resultant solution washed with water (10 ml) and brine (10 ml), dried over MgSO4, filtered and concentrated to a white solid (0.35 g, 1.4 mmol, 70% yield.