反应详情

温度

0 °C

3.2 g of dimethylformamide was added to solution in which 1.61 g of 4-(3-(3,5-dichlorophenyl)-4,4,4-trifluoro-2-butenoyl)-2-methylbenzoic acid was dissolved into 8.51 g of toluene, and the mixture was cooled to 0° C. A solution in which 0.64 g of sodium hydroxide was dissolved into 1.6 g of water was added to the mixture, and a solution in which 0.46 g of hydroxylamine sulfate dissolved into 1.11 g of water was slowly added in dropwise with care not to generate heat. After reacting the mixture for 3 hours with stirring while keeping the reaction temperature at 0° C., the resultant solution was analyzed by high-performance liquid chromatography (wavelength 254 nm). The target product of 4-(5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl)-2-methylbenzoic acid was produced in 90.49% of relative area.

1. additionwas added to the mixture
2. additionwas slowly added in dropwise with care not
3. temperatureto generate heat
4. customfor 3 hours
5. customat 0° C.