反应详情

Sodium dithionite (104.4 g, 0.6 m) in water (400 ml) was added in portions to a slurry of 3-chloro-2-nitrobenzoic acid (30 g, 0.15 m) in water (200 ml) containing concentrated ammonium hydroxide solution (10 ml). After stirring an additional 20 minutes the mixture was filtered, acidified to pH 3-4 with concentrated hydrochloric acid and filtered again. The filtrate was saturated with sodium chloride and extracted with ether. Drying and concentration of the extract gave a white powder which was combined with the precipitates above. The crude product was used without further purification.

1. filtrationwas filtered
2. filtrationfiltered again
3. extractionextracted with ether
4. customDrying
5. customconcentration of the extract gave a white powder which
6. customprecipitates above
7. customThe crude product was used without further purification