反应详情

A 0.5 g. amount of sodium metal is dissolved in 150 ml. of absolute ethanol, then 14.36 g. of 5-chloro-2-hydrazinopyridine (prepared as described in Example 3) is added followed by 12.92 g. of cinnamonitrile. The reaction mixture is refluxed for 16 hours. The solvent is removed in vacuo and water is added to the residue to separate a solid. The solid is collected by filtration and dissolved in dichloromethane. The solution is dried over anhydrous sodium sulfate and filtered through a hydrous magnesium silicate. The filtrate is concentrated while adding hexane to separate crystals. The material is recrystallized from ethyl acetate to give 11.68 g. of a light yellow crystalline material. The material is dried in vacuo to give the product of the Example as yellow crystals, m.p. 142°-147° C.

1. temperatureThe reaction mixture is refluxed for 16 hours
2. customThe solvent is removed in vacuo and water
3. additionis added to the residue
4. customto separate a solid
5. filtrationThe solid is collected by filtration
6. dissolutiondissolved in dichloromethane
7. dry with materialThe solution is dried over anhydrous sodium sulfate
8. filtrationfiltered through a hydrous magnesium silicate
9. concentrationThe filtrate is concentrated
10. additionwhile adding hexane
11. customto separate crystals
12. customThe material is recrystallized from ethyl acetate
13. customto give 11.68 g
14. customThe material is dried in vacuo
15. customto give the product of the Example as yellow crystals, m.p. 142°-147° C.