反应详情

17.5 g of ethyl 3-diethylamino-2-(2,4-dichloro-5-fluorobenzoyl)acrylate are heated to boiling under reflux with 2.9 g of cyclopropylamine and 50 ml of toluene for 30 minutes. The toluene is removed by distillation in vacuo, and the residue, which solidifies to crystals, is recrystallized from cyclohexane/light petroleum. 12.9 g of ethyl 3-cyclopropylamino-2-(2,4-dichloro-5-fluorobenzoyl)acrylate of melting point 89°-90° C. are obtained.

1. customThe toluene is removed by distillation in vacuo
2. customis recrystallized from cyclohexane/light petroleum