Isopropanol → HCID 86654826, compound

Participants

Reaction Conditions

Reaction Steps

2-Methylimidazole was allowed to react with one equivalent of sodium hydride at room temperature in 1,2-dimethoxyethane as a solvent, and then three equivalents of 1-bromopropane was slowly added thereto, followed by stirring at 60° C. for two days. About one day after the start of stirring, an adequate amount of 2-propanol was added thereto as a co-solvent. After the completion of stirring, the solvent and unreacted 1-bromopropane were distilled off. The residual solid was recrystallized twice from acetone to give 1,3-di-n-propyl-2-methylimidazolium bromide as transparent and colorless crystals (ionic liquid No. 3 in Table 1). Then, 1,3-di-n-propyl-2-methylimidazolium bromide was dissolved in water, and one equivalent of silver sulfate was added thereto, followed by stirring for about 1 hour at room temperature. The resultant precipitate of silver bromide was removed by filtration, and then water was distilled off. The residual solid was recrystallized from acetonitrile to give 1,3-di-n-propyl-2-methylimidazolium sulfate as white fine crystals.

Provenance & Evidence