反应详情

温度

25 °C

To a solution of 2-phenyl-4-trifluoromethyl-thiazole-5-carboxylic acid ethyl ester (1.6 g, 5.3 mmol) in THF (16 mL) was added 1 N aqueous LiOH (16 mL, 16 mmol). This mixture was brought to reflux and stirred vigorously for 1 h. The mixture was allowed to cool to 25° C. and 1 N aqueous HCl (35 mL, 35 mmol) was added. The mixture was extracted with ethyl acetate (2×50 mL) and the combined organic extracts were washed with saturated aqueous NaCl (1×50 mL), dried over MgSO4 and concentrated in vacuo to give the carboxylic acid as a white solid (1.32 g, 91%).

1. temperatureto reflux
2. extractionThe mixture was extracted with ethyl acetate (2×50 mL)
3. washthe combined organic extracts were washed with saturated aqueous NaCl (1×50 mL)
4. dry with materialdried over MgSO4
5. concentrationconcentrated in vacuo