Preparation of ionic liquids through van Leusen imidazole synthesis for biomass pretreatment
The ionic liquids were chosen and synthesized for further lignocellulose feedstock pretreatment based on the analysis of the correlation between the properties of ionic liquids and their structures. The synthesis was carried out in two steps through van Leusen substituted imidazoles preparation. The ionic liquids were obtained at the second step by the quaternization reaction. The obtained compounds are expected to have better cellulose solubilizing ability due to lower viscosities and lower melting points as compared with the traditionally applied ionic liquids. The methods of the ionic liquids synthesis through van Leusen substituted imidazoles preparation was developed based on the results of the experimental research.