反应详情

温度

40 °C

4-(Acetoxymethyl)-2-[(E)-2-[4-(trifluoromethyl)phenyl]ethenyl]-1,3-oxazole (20.0 g, 64.3 mmol) was dissolved in dimethyl sulfoxide (200 ml), and 2N-aqueous sodium hydroxide solution (35 mL 70.0 mmol) was added at 50° C. The mixture was stirred at about 40° C. for 15 min. Water (200 ml) was added at the same temperature. After allowing to cool to room temperature and stirring, the mixture was stirred at the same temperature for 1 hour. The precipitated crystals were collected by filtration, washed with water (60 ml) and dried under reduced pressure to give 4-(hydroxymethyl)-2-[(E)-2-[4-(trifluoromethyl)phenyl]ethenyl]-1,3-oxazole (16.4 g, 61.1 mmol, yield 95%).

1. temperatureto cool to room temperature
2. stirringstirring
3. stirringthe mixture was stirred at the same temperature for 1 hour
4. filtrationThe precipitated crystals were collected by filtration
5. washwashed with water (60 ml)
6. customdried under reduced pressure