反应详情

温度

100 °C

0,5 mole of diphenylamine was taken together with 0.53 mole of phenyl isocyanate and 0.6 g of di-n-butl phosphate in 150 ml of toluene. The mixture was heated at 100° C. for 24 hours, with stirring, and then cooled to room temperature. At about 30° C., the urea started to crystallize out. After filtering off, washing with 150 ml of cold toluene and drying, 0.41 mole of N-phenyl-N',N'-diphenylurea was obtained. Melting point: 131° C./yield: 82% of theory.

1. temperaturecooled to room temperature
2. customAt about 30° C.
3. customto crystallize out
4. filtrationAfter filtering off
5. washwashing with 150 ml of cold toluene
6. customdrying