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2 protocols using butyl bromide

1

Synthesis and Characterization of Novel Ionic Liquids

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Chemicals and reagents (viz., 1-methyl imidazole; pyridine; diethylamine (DEA); butyl bromide; methane sulfonic acid; dichloroacetic acid; potassium hydrogen sulfate; lithium bis(trifluoromethanesulfonyl)imide (Li [Tf2N]); sodium tetrafluoroborate (Na [BF4]); potassium hydrogen sulfate (K[HSO4]); sodium hydroxide) were procured from Sigma Aldrich. All solvents, such as methanol (CH3OH), chloroform (CHCl3), acetonitrile (CH3CN), n-Hexane, ethyl acetate, and distilled water, were purchased from Sigma Aldrich. All organic solvents were dried with the help of distillation assembly.
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2

Synthesis of 1-Butylimidazole from Imidazole

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Imidazole (Him), methyl Imidazole (mim), butyl bromide, 1,4butanesultone, sodium ethoxide, p-nitrophenyl acetate, sulfuric acid (97-98%), and sodium bisulfate used as precursors or reactants were from Sigma-Aldrich. Methanol, sulfuric ether, ethyl acetate, hexane, acetone, butyl alcohol, and dichloromethane used as solvents or eluents were from Sigma-Aldrich. 1-ButylImidazole (bim) was synthesized by reaction of Imidazole with butyl bromide through an aliphatic nucleophilic substitution, following a previously reported method that employs sodium ethoxide for deprotonating the Imidazole, 27, 28 as it described in the ESI. †
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