反应详情

9.2 g (69 mmol) of N-chlorosuccinimide was charged to a N,N-dimethylformamide (DMF) 15 ml solution of 8.0 g (65 mmol) of 2-methoxy-4-methylpyridine, followed by stirring for 18 hours. Water was added to the reaction solution, and the aqueous layer was extracted with diethyl ether. The organic layer was washed with a saturated sodium chloride solution, dried over anhydrous sodium sulfate and subjected to filtration, and the solvent was distilled off under reduced pressure. The crude product was purified by silica gel column chromatography to obtain 8.5 g (yield: 82%) of 5-chloro-2-methoxy-4-methylpyridine (melting point 32 to 33° C.).

1. extractionthe aqueous layer was extracted with diethyl ether
2. washThe organic layer was washed with a saturated sodium chloride solution
3. dry with materialdried over anhydrous sodium sulfate
4. filtrationsubjected to filtration
5. distillationthe solvent was distilled off under reduced pressure
6. customThe crude product was purified by silica gel column chromatography