反应详情

To a boiling suspension of 5.9 g(0.12 mol) sodiumhydride (55%) in 100 ml tetrahydrofuran was slowly added over a period of 6 hours a mixture of 10.1 g (0.035 mol) 3-benzenesulfonyl-methyl-5-furan-2-yl-1H-[1,2,4]triazole and 4.56 g (0.035 mol) 3-(4-pyridinyl)-2-propenenitrile in 400 ml tetrahydrofuran. Boiling was continued for 15 hours and then 50 ml methanol were added at room temperature. Evaporation of the solvent and chromatography on silicagel with dichloromethane/methanol 95/5 gave 1.3 g (13%) 2-furan-2-yl-7-pyridin-4-yl-[1,2,4]triazolo [1,5-a]pyridin-5-ylamine as yellow crystals with mp. 294-296° C.

1. additionwas slowly added over a period of 6 hours
2. customEvaporation of the solvent and chromatography on silicagel with dichloromethane/methanol 95/5