ChemicalBook CAS DataBase List 1-Butyl-3-methylimidazolium bromide

1-Butyl-3-methylimidazolium bromide synthesis

3synthesis methods

Product Name:1-Butyl-3-methylimidazolium bromide
CAS Number:85100-77-2
Molecular formula:C8H15BrN2
Molecular Weight:219.12

Preparation of 1-butyl-3-methylimidazolium bromide: A three-necked 50 mL round bottom flask was charged with N-methylimidazole (0.10 mol) followed by dropwise addition of 1-bromobutane (0.11 mol) at 70 ℃. After the addition was completed, the resulting mixture was stirred at 140 ℃ for 1.5 h. The combined organic layer was washed three times by ethyl acetate and vacuum-dried overnight at 70 ℃.

616-47-7 Synthesis

616-47-7
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109-65-9 Synthesis

109-65-9
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85100-77-2
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$6.00/5g

Yield:85100-77-2 100%

Reaction Conditions:

ultrasound;

Steps:

4
4.89 g of methylimidazole (0.059 mol) and 8.98 g of butyl bromide (0.065 mol) are introduced into a beaker. The beaker is placed under ultrasound, adjusted to have a pulsation of 2 seconds, with an instantaneous power of 15 W. The butylmethylimidazolium bromide is obtained with 100% yield. This product is then added dropwise at ambient temperature to a mixture containing 50 ml of water and an equimolar quantity of lithium bis(trifluorosulphonyl)imide. The mixture is then maintained for two hours under reflux. The product is then extracted with three times 20 ml of dichloromethane before being evaporated under vacuum at 70° C. for 30 minutes. The overall yield is 94%.

References:

Vioux, Andre;Le Bideau, Jean;Neouze, Marie-Alexandra;Leroux, Fabrics US2007/7137, 2007, A1 Location in patent:Page/Page column 4-5

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4316-42-1 Synthesis