反应详情

A stirred solution of 8.3 grams (0.063 mole) of 2-amino-3-cyano-4-methylpyridine in 125 mL of N,N-dimethylformamide is cooled in an ice bath, and a solution of 11.2 grams (0.063 mole) of N-bromosuccinimide in 125 mL of N,N-dimethylformamide is added dropwise during a 30 minute period, while maintaining the reaction mixture temperature at about 15°-25° C. Upon completion of addition, the reaction mixture is stirred at ambient temperature for about 20 hours. After this time, the reaction mixture is poured into 1 liter of aqueous 3N sodium hydroxide. The mixture is then diluted to a volume of about 1700 mL with distilled water. A solid precipitate is collected by filtration and dried under reduced pressure, yielding 2-amino-5-bromo-3-cyano-4-methylpyridine.

1. temperaturewhile maintaining the reaction mixture temperature at about 15°-25° C
2. additionUpon completion of addition
3. filtrationA solid precipitate is collected by filtration
4. customdried under reduced pressure