反应详情

A slurry of 4-fluoro-2-nitrophenol (3.3 g), sodium hydroxide (0.83 g), potassium iodide (2.33 g) and potassium iodate (1.5 g) in water (21 ml) was added to a stirred mixture of ethanol (16 ml), water (3.5 ml) and concentrated sulphuric acid (1.7 ml) at 50°. The mixture was heated under reflux for 2 hours and was then allowed to stand at room temperature overnight. A small quantity of sodium sulphite was added to decolourise the product and the yellow solid was filtered and crystallised from aqueous ethanol to give yellow crystalls of 4-fluoro-2-iodo-6-nitrophenol (3.5 g) m.p. 40°.

1. temperatureThe mixture was heated
2. temperatureunder reflux for 2 hours
3. filtrationthe yellow solid was filtered
4. customcrystallised from aqueous ethanol