1-Methylimidazole → 1-Propenyl-3-methylimidazolium Bromide
Reaktionsgleichung
[Br:1][CH2:2][CH2:3][CH3:4].[CH3:5][N:6]1[CH:10]=[CH:9][N:8]=[CH:7]1>>[Br-:1].[CH3:5][N+:6]1[CH:10]=[CH:9][N:8]([CH2:2][CH2:3][CH3:4])[CH:7]=1Komponenten
3
Reaktionsbedingungen
- Temperatur
- 70 °C
Versuchsvorschrift
450 g of 1-bromopropane (3.66 mol) are loaded into a 1 l glass reactor. The mixture is heated to 70° C. and then 200 g of 1-methylimidazole (2.44 mol) are poured in dropwise, with stirring. The mixture is left to react for 1 h at 70° C. After returning to room temperature, the mixture is separated by decantation. The bottom ionic liquid phase is recovered, washed with toluene (1×100 ml), and then evaporated under vacuum. 475 g of 1-methyl-3-propylimidazolium bromide are obtained in the form of a yellow liquid. The product is used as a base without further purification.