反应详情

温度

45 °C

4-(Trifluoromethyl)cinnamic acid (64.85 g, 300 mmol) was added in toluene (325 ml) and dimethylformamide (2.2 ml). Thionyl chloride (26.3 ml, 361 mmol) was added dropwise at room temperature, and the mixture was heated at 45° C. for 2 hours. The obtained reaction mixture was added dropwise to 25% aqueous ammonia (325 ml) while keeping the mixture at 5-20° C. The mixture was stirred at room temperature for 1 hour. The precipitated crystals were collected by filtration, washed with 20 water and isopropyl ether and dried under reduced pressure to give 4-(trifluoromethyl)cinnamamide (60.76 g, yield 94%).

1. customThe obtained reaction mixture
2. customat 5-20° C
3. filtrationThe precipitated crystals were collected by filtration
4. washwashed with 20 water and isopropyl ether
5. customdried under reduced pressure