反应详情

A 3 liter, three neck, round bottom flask equipped with a mechanical stirrer, reflux condenser and dropping funnel was charged with 4-(2-aminoethyl)pyridine (61.0 g., 0.5 mole) in 50 ml. of methylene chloride. Sodium carbonate (124.0 g., 1.0 mole) in water was added in one portion, and with stirring the heterogeneous reaction mixture was cooled in an ice-bath. 2-Methoxynicotinyl chloride (86 g., 0.5 mole) in methylenechloride (500 ml.) was added drop-wise and the mixture was allowed to warm to room temperature as vigorous stirring was continued for 2 hours. At this point the organic layer was removed and the aqueous layer extracted twice with 100 ml. portions of methylene chloride. The combined organic layers were then extracted three times with cold, dilute (0.5N) sodium hydroxide. The organic layer was dried over sodium sulfate, filtered and concentrated in vacuo to a yellow oil, which solidified upon standing, affording 97 g. (0.37 mmole, 75%) of product. Recrystallization from cyclohexane gave the analytical sample, a white crystalline solid, m.p. 84°-97°.

1. customA 3 liter, three neck, round bottom flask equipped with a mechanical stirrer
2. temperaturereflux condenser
3. temperaturewas cooled in an ice-bath
4. stirringas vigorous stirring
5. customAt this point the organic layer was removed
6. extractionthe aqueous layer extracted twice with 100 ml
7. extractionThe combined organic layers were then extracted three times with cold,
8. additiondilute (0.5N) sodium hydroxide
9. dry with materialThe organic layer was dried over sodium sulfate
10. filtrationfiltered
11. concentrationconcentrated in vacuo to a yellow oil, which
12. customaffording 97 g
13. customRecrystallization from cyclohexane
14. customgave the analytical sample