反应详情

温度

7.5 °C

O-Methylisourea hydrogen sulfate (17.2 g, 0.1 mol) was suspended in water (100 mL) containing NaOH (20 g, 0.5 mol) and the mixture cooled to 5-10° C. The mixture was stirred vigorously as benzoyl chloride (35.15 g, 0.25 mol) was added at such a rate that the reaction temperature did not rise above 15° C. After the last addition, the mixture was stirred for 3 h and the resulting solid collected by vacuum filtration to give N,N′-dibenzoylcarbamimidoic acid, methyl ester.

1. additionwas added at such a rate that the reaction temperature
2. customdid not rise above 15° C
3. additionAfter the last addition
4. filtrationthe resulting solid collected by vacuum filtration