反应详情

In a 300-ml four-necked flask were placed 206.2 g (2.10 moles) of concentrated sulfuric acid and 19.6 g (0.19 mole) of 60% nitric acid. The mixture was stirred on an ice bath and 25.7 g (0.17 mole) of 4-phenylpyridine was added at 0° C. After the addition, the stirring was continued at 0° C. for three hours. The reaction mixture thus prepared was added in drops to 1250.0 g of ice placed in a 2000-ml four-necked flask. The mixture was stirred on an ice bath and 600.6 g (4.43 moles) of a 29.5% aqueous solution of sodium hydroxide was added in drops. Thereafter, a solid was recovered by filtration at 0° C. The solid was washed with water and recrystallized twice from 200 ml of 5M hydrochloric acid. To the solid thus obtained was added 200 ml of 5M hydrochloric acid in drops. The solid was dissolved by heating and 201.4 g (1.49 moles) of a 29.5% aqueous solution of sodium hydroxide was added in drops. The mixture was cooled to room temperature and a separated solid was recovered by filtration. The solid was washed with water and dried under reduced pressure to give 12.9 g of 4-(4-nitrophenyl)pyridine.

1. customIn a 300-ml four-necked flask were placed
2. additionAfter the addition
3. customThe reaction mixture thus prepared
4. customplaced in a 2000-ml four-necked flask
5. stirringThe mixture was stirred on an ice bath
6. filtrationThereafter, a solid was recovered by filtration at 0° C
7. washThe solid was washed with water
8. customrecrystallized twice from 200 ml of 5M hydrochloric acid
9. customTo the solid thus obtained
10. dissolutionThe solid was dissolved
11. temperatureby heating
12. filtrationa separated solid was recovered by filtration
13. washThe solid was washed with water
14. customdried under reduced pressure