反应详情

温度

50 °C

To a mixture of 0.71 g of N-[4-chloro-2-fluoro-5-{2-(methoxycarbonyl)methoxy-3-pyridyloxy}phenyl]trifluoroacetoacetamide and 2 ml of acetic acid was added sodium cyanate, and the mixture was stirred at 50° C. for 1 hour and then at 110° C. for 1.5 hours. After cooling, water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium bicarbonate solution, saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and then concentrated. The residue was subjected to silica gel column chromatography to give 0.30 g of 3-{2-chloro-4-fluoro-5-[2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyridin-1-yl]phenoxy}-2-(methoxycarbonyl)methoxypyridine.

1. waitat 110° C. for 1.5 hours
2. temperatureAfter cooling
3. extractionthe mixture was extracted with ethyl acetate
4. washThe organic layer was washed with saturated aqueous sodium bicarbonate solution, saturated aqueous sodium chloride solution
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated