反应详情

3-(4-chloro-2-fluoro-5-hydroxyphenyl)-6-trifluoromethyl-2,4(1H,3H)-pyrimidinedione (2.5 g) was added to an ice cooled con. nitric acid (50 ml). After stirring for 1 hr, the reaction mixture was poured into ice-cold water. The yellow crystals were collected by filtration to afford the title compound (0.9 g). The filtrate was extracted by ethyl acetate (200 ml) and washed with brine. The organic phase was dried over anhydrous sodium sulfate. After removal of the solvent, 0.6 g of title compound was obtained as yellow crystal.

1. temperaturecooled con
2. additionthe reaction mixture was poured into ice-cold water
3. filtrationThe yellow crystals were collected by filtration