反应详情

32.5 g of potassium hydroxide flakes in 30 ml of water were added to 54.5 g (0.5 mole) of 4-aminophenol dissolved in 350 ml of dimethylsulfoxide, and 150 ml of a water/dimethylsulfoxide mixture were distilled off in vacuo at 15-20 mm Hg. 125 g (0.5 mole) of 1-trifluoromethyl-3,4,5-trichlorobenzene [nD20 : 1.5008 67- 68% of theory, compare J. Am. Chem. Soc. 57, 2066-2068 (1935) and U.S. Pat. No. 2,654,789] were then added to the reaction mixture at about 70°-80° C and the mixture was stirred for a further 2 hours at 120°-130° C. The substance was precipitated with water, filtered off, washed with water and recrystallized moist from an ethanol/water mixture, thus giving 40-50% of theory of 4-(2,6-dichloro-4-trifluoromethylphenoxy)-aniline of melting point 128°-130° C.

1. distillation150 ml of a water/dimethylsulfoxide mixture were distilled off in vacuo at 15-20 mm Hg
2. addition2,654,789] were then added to the reaction mixture at about 70°-80° C
3. customThe substance was precipitated with water
4. filtrationfiltered off
5. washwashed with water
6. customrecrystallized moist from an ethanol/water mixture