Reaktion #76221

Reaktionsgleichung

1-bromopropane

1-methylimidazole

→

1-methyl-3-propylimidazolium bromide

Ausbeute 94.9%

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.WAITThe mixture is left
2. 2
   Sonstigeto react for 1 h at 70° C
3. 3
   SonstigeAfter returning to room temperature
4. 4
   Sonstigethe mixture is separated by decantation
5. 5
   SonstigeThe bottom ionic liquid phase is recovered
6. 6
   Waschenwashed with toluene (1×100 ml)
7. 7
   Sonstigeevaporated under vacuum

Vorschrift

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.

Quelle