反应详情

3.4 g (20 mmol) of 2-hydroxy-3-chloro-5-acetylpyridine are stirred with 3.7 g (24 mmol) of phosphorus oxychloride and 2.4 g (20 mmol) of N,N-dimethylaniline in 75 ml of chlorobenzene at 100° C. for 1.5 hours. The mixture is stirred into 200 ml of ice-water and extracted with ethyl acetate. Drying and evaporation gives 3.6 g (95%) of 2,3-dichloro-5-acetylpyridine, melting point: 80° C.

1. extractionextracted with ethyl acetate
2. customDrying
3. customevaporation