Triethylamine → 3-Dimethylamino-2-(2,4-dichloro-5-fluorobenzoyl)acrylonitrile

참여 물질

반응 단계

9.6 g of 3-dimethylaminoacrylonitrile and 10.5 g of triethylamine are added dropwise to a solution of 22.75 g of 2,4-dichloro-5-fluorobenzoyl chloride in 100 ml of anhydrous dioxane, while cooling in ice and stirring. The mixture is stirred at room temperature for 1 hour and then heated to boiling under reflux for 4 hours. The solvent is removed by distillation in vacuo, and the residue is taken up in methylene chloride/water. The methylene chloride phase is washed with water, dried with sodium sulphate, and evaporated in vacuo. The crystalline residue is recrystallized from ethanol. 22.2 g of 3-dimethylamino-2-(2,4-dichloro-5-fluorobenzoyl)acrylonitrile of melting point 138°-139° C. are obtained.

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