反应详情

Into 500 ml of a diethyl ether solution of 13.8 g (0.1 mol) of p-nitroaniline was added dropwise 50 ml of a diethyl ether solution of 11.1 g (0.1 mol) of methacryloyl isocyanate over about 30 minutes in an ice bath. After completion of the addition, the produced crystal was filtered and the filtrate was distilled under a reduced pressure. The yellow solid gathered from the filtration and the distillation residue was recrystallized with methyl ethyl ketone to obtain 19.7 g of 1-methacryloyl-3-(4-nitrophenyl)urea (Compound 1) which had a decomposing point of 241° to 244° C. and was yellow needle crystal.

1. additionAfter completion of the addition
2. filtrationthe produced crystal was filtered
3. distillationthe filtrate was distilled under a reduced pressure
4. filtrationThe yellow solid gathered from the filtration
5. customthe distillation residue was recrystallized with methyl ethyl ketone