反应详情

温度

125 °C

Under a nitrogen atmosphere, carefully reflux (bath temperature of 125° C) a mixture containing 19.4 g. of 2-pyridylbenzyl cyanide, 6.6 g. of ethylene diamine and 0.2 g. of sulphur for 5 hrs. Cool the reaction mixture and under a nitrogen atmosphere dissolve the residue in 300 ml. of benzene, and water wash, dry (over anhydrous potassium carbonate) and filter the benzene solution. Concentrate the filtrate to a small volume whereupon the product crystallizes. Filter the crystals to yield 2-[α-(2-pyridyl) benzyl]-imidazoline, m.p. 134°-136° C. The maleate salt, m.p. 132°-135° C, is prepared from maleic acid and is crystallized from isopropanol.

1. additioncontaining 19.4 g
2. temperatureCool the reaction mixture
3. dissolutionunder a nitrogen atmosphere dissolve the residue in 300 ml
4. washof benzene, and water wash
5. dry with materialdry (over anhydrous potassium carbonate)
6. filtrationfilter the benzene solution
7. concentrationConcentrate the filtrate to a small volume whereupon the product
8. customcrystallizes
9. filtrationFilter the crystals