反应详情

A 2 L flask was charged with 1-benzoyl-3-(5-bromo-3-phenoxypyridin-2-yl)thiourea (94.3 g, 220 mmol) and THF (900 mL). 2M NaOH (330 mL, 660 mmol) was added and the reaction was heated at reflux overnight. The reaction was cooled to ambient temperature and 300 mL water was added slowly and then the THF was removed in vacuo to afford an aqueous slurry which was filtered, washed with water and dried to give 1-(5-bromo-3-phenoxypyridin-2-yl)thiourea (66.35 g, 93% yield) as a light tan solid.

1. temperaturethe reaction was heated
2. temperatureat reflux overnight
3. customthe THF was removed in vacuo
4. customto afford an aqueous slurry which
5. filtrationwas filtered
6. washwashed with water
7. customdried