反应详情

A mixture of 5-chlorosalicylic acid(6.90 g, 40 mmol), 3,5-bis(trifluoromethyl)aniline(9.16 g, 40 mmol), phosphorus trichloride(1.74 mL, 20 mmol) and toluene(80 mL) was refluxed for 3 hours under argon atmosphere. After the reaction mixture was cooled to room temperature, it was diluted with ethyl acetate (240 mL). After the ethyl acetate layer was washed successively with water and brine, dried over anhydrous magnesium sulfate, the residue obtained by evaporation of the solvent under reduced pressure was purified by column chromatography on silica gel (n-hexane:ethyl acetate=4:1) to give the title compound (13.12 g, 85.5%) as a light yellow solid.

1. temperaturewas refluxed for 3 hours under argon atmosphere
2. washAfter the ethyl acetate layer was washed successively with water and brine
3. dry with materialdried over anhydrous magnesium sulfate
4. customthe residue obtained by evaporation of the solvent under reduced pressure
5. customwas purified by column chromatography on silica gel (n-hexane:ethyl acetate=4:1)