Phenyl isocyanate → 1-Ethyl-3-(phenylcarbamoyl)urea
Reaktionsgleichung
[CH2:1]([NH:3][C:4]([NH2:6])=[O:5])[CH3:2].[C:7]1([N:13]=[C:14]=[O:15])[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1>O1CCOCC1>[CH2:1]([NH:3][C:4]([NH:6][C:14]([NH:13][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1)=[O:15])=[O:5])[CH3:2]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
In 50 ml of anhydrous dioxane, 3.5 g (0.04 mol) of ethyl urea was dissolved, and under stirring 4.8 g (0.04 mol) of phenylisocyanate was added thereinto. The reaction was carried out at a room temperature for 15 hours, then the solvent was removed by distillation under a reduced pressure. The residue thus obtained was recrystallized from ethanol-water to obtain 4.6 g (yield 55%) of 1-ethyl-5-phenylbiuret having a melting point of 80°-81.5° C.