反应详情

To a solution of 150 g of 3-aminopyridine dissolved in 1000 ml of tuluene, 176 g of 2-chloroethylisocyanate was added dropwise over 30 minutes under cooling. After stirring at room temperature for 5 hours, the precipitated crystals were collected by filtration to give 318 g of N-(2-chloroethyl)-N'-(3-pyridyl) urea.

1. additionwas added dropwise over 30 minutes
2. temperatureunder cooling
3. filtrationthe precipitated crystals were collected by filtration