Ammonia → 5-(aminomethyl)-1-methyl-1H-1,2,4-triazole-3-carboxamide
反応式
[NH3:1].[NH2:2][CH2:3][C:4]1[N:8]([CH3:9])[N:7]=[C:6]([C:10]([O:12]CC)=O)[N:5]=1>C(O)C>[NH2:2][CH2:3][C:4]1[N:8]([CH3:9])[N:7]=[C:6]([C:10]([NH2:1])=[O:12])[N:5]=1参加物
4
実験手順
Ammonia gas was passed for 20 minutes at −10° C. into a solution of 6.8 g (not more than 23.2 mmol) of ethyl 5-aminomethyl-1-methyl-1H-[1,2,4]-triazole-3-carboxylate in 200 ml of ethanol. Stirring was continued for one hour at 0° C. and overnight at room temperature. Since the reaction was incomplete, the procedure of passing in gas was repeated twice more (as described above) and the mixture was stirred overnight at 0° C. The mixture was concentrated on a rotary evaporator and the residue was purified by column chromatography (dichloromethane +5-10% methanol, Rf=0.3 in dichloromethane/methanol 9:1). This gave 4.71 g as colorless oil. 1H NMR (270 MHz, DMSO-d6): δ=1.4 (s, 9H), 3.85 (s, 3H), 4.3 (d, J=5 Hz, 3H), 7.4 (bs, 1H), 7.6 (bs, 1H), 7.65 (bs, J=5 Hz, 1H).