Ethyl bromoacetate → Ethyl 2-(1H-1,2,3-triazol-1-YL)acetate
反応式
[Na].[NH:2]1[CH:6]=[CH:5][N:4]=[N:3]1.Br[CH2:8][C:9]([O:11][CH2:12][CH3:13])=[O:10]>C(O)C>[CH2:12]([O:11][C:9](=[O:10])[CH2:8][N:2]1[CH:6]=[CH:5][N:4]=[N:3]1)[CH3:13]参加物
5
実験手順
129.2 g (5.6 mol) sodium are slowly added to 4.0 liters ethanol. 400.0 g (5.6 mol) 1,2,3-1H-triazole are then added and 623 ml (938.2 g, 5.6 mol) ethyl bromoacetate are added dropwise at an internal temperature of 20-25° C. The mixture is stirred at RT for 48 h. The solid which has precipitated out is filtered off, the ethanol is removed in vacuo and the mixture is filtered again. The residue is taken up in ethyl acetate, the mixture is filtered and is concentrated in vacuo again and the residue is purified by distillation over a 30 cm column. The product is obtained at a bath temperature of 140° C., an overhead temperature of 60-115° C. and a pressure of 1 mbar.