反应详情

温度

100 °C

9.3 g (50 mmol) of 3-chloro-4-hydroxylphenylacetic acid was dissolved in 100 ml of N,N-dimethylformamide, and 15.2 g (110 mmol) of potassium carbonate was added thereto. The mixture was stirred at 100° C. for one hour. Then, 10.9 g (60 mmol) of 2-chloro-5-trifluoromethylpyridine was added thereto, and the mixture was stirred for 8 hours at 120° C. After cooling, the reaction solution was poured into water and washed twice with ethyl acetate. The obtained aqueous layer was adjusted to pH 4 with citric acid and extracted with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate. Then, ethyl acetate was distilled off under reduced pressure. The obtained residue was recrystallized from ethanol to obtain 8.3 g of the desired product as a white powder (melting point: 138° to 139° C.).

1. stirringthe mixture was stirred for 8 hours at 120° C
2. temperatureAfter cooling
3. washwashed twice with ethyl acetate
4. extractionextracted with ethyl acetate
5. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
6. distillationThen, ethyl acetate was distilled off under reduced pressure
7. customThe obtained residue was recrystallized from ethanol