反应详情

温度

120 °C

A mixture of 1-(3,4,5-trifluoro-2-hydroxyphenyl)ethanone (7.5 g), p-toluenesulfonic acid monohydrate (0.375 g), morpholine (10 mL) and sulfur (2.0 g) was stirred at 120° C. for 5 hr, and allowed to cool to room temperature, and hydrochloric acid (20 mL) and acetic acid (20 mL) were added to the reaction mixture. The reaction mixture was stirred at 100° C. for 3 hr, allowed to cool to room temperature, and extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (6.0 g).

1. temperatureto cool to room temperature
2. stirringThe reaction mixture was stirred at 100° C. for 3 hr
3. temperatureto cool to room temperature
4. extractionextracted with ethyl acetate
5. washThe extract was washed with saturated brine
6. dry with materialdried over anhydrous magnesium sulfate
7. customthe solvent was evaporated under reduced pressure
8. customThe residue was purified by silica gel column chromatography (ethyl acetate/hexane)