反应详情

A solution of 1.88 g. of 2,6-dichlorophenylisocyanate in 25 ml. of anhydrous ether was added dropwise to a stirred solution of 1.64 g. of 1-(2-pyrazinyl)piperazine in 250 ml. of anhydrous ether. The mixture was stirred for 30 minutes and the solid was collected and recrystallized from ethanol, giving 3.12 g. of the desired product, m.p. 177°-179° C.

1. customthe solid was collected
2. customrecrystallized from ethanol
3. customgiving 3.12 g