反应详情

温度

60 °C

A mixture of methyl 4-[5-(4-trifluoromethylphenyl)-3-isoxazolyl]benzoate (0.486 g), 1 M aqueous sodium hydroxide solution (4 ml), tetrahydrofuran (20 ml) and methanol (20 ml) was stirred at 60° C. for 1 hr. After cooling, the reaction mixture was poured into water and 1 M hydrochloric acid (15 ml) was added. The crystals were collected by filtration and recrystallized from ethanol to give 4-[5-(4-trifluoromethylphenyl)-3-isoxazolyl]benzoic acid (0.358 g, yield 77%) as a colorless crystalline powder. melting point: >300° C.

1. temperatureAfter cooling
2. additionwas added
3. filtrationThe crystals were collected by filtration
4. customrecrystallized from ethanol