1-Ethyl-3-methylimidazolium bromide synthesis

5synthesis methods

Product Name:1-Ethyl-3-methylimidazolium bromide
CAS Number:65039-08-9
Molecular formula:C6H11BrN2
Molecular Weight:191.07

143314-17-4
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106-93-4
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111-55-7 Synthesis

111-55-7
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65039-08-9
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$9.00/10g

Yield:111-55-7 90%

Reaction Conditions:

at 20; for 3 h;Inert atmosphere;

Steps:

2
Example 1 and 2: ethylene glycol diacetate; A 100 mL Schlenk flask was equipped with a magnetic stirring bar, EMIM-acetate (50.0 g, 0.293 mol), and 0.5 equivalents of 1,2-dichloroethane (14.5 g, 0.146 mol) were added at room temperature and reaction was stirred at 70°C for 3h. After reaction two phases were obtained upper layer was decanted and the reaction mixture was extracted 3 times with diethyl ether, all fractions were combined and diethyl ether was removed under vacuum. The final pure product was obtained as color less liquid (90.0% yield) When 1, 2-dibromoethane was used as substrate the reaction was very fast even at room temperature and was highly exothermic. The reaction proceeds via homogeneous pathway; the pure product was distilled from the reaction mixture at 100°C under reduced pressure (90.0% yield). Ethylene glycol diacetate: ¹H NMR (CDCl₃, 400.13 MHz): δ = 2.02 (s, 6 H, CH₃), 4.2 (s, 4H, CH₂); ¹³C NMR: δ = 20.9 (CH₃), 62.3 (CH₂), 170.9 (CO); FTIR (ATR mode): v = 2961 (br), 1735 (s), 1371 (m), 1213 (s), 1048 (m).

References:

BASF SE;Universit?t Siegen Institut für Anorganische Chemie EP2532646, 2012, A1 Location in patent:Page/Page column 5-7

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616-47-7 Synthesis