Original articleN-Methylimidazolium perchlorate as a new ionic liquid for the synthesis of bis(pyrazol-5-ol)s under solvent-free conditions

Add time:08/24/2019    Source:sciencedirect.com

N-Methylimidazolium perchlorate ([MIm]ClO4) was synthesized and some of its physico-chemical properties, such as density, surface tension were investigated. A thermo gravimetric analysis (TGA) and solvent performance were also studied. The results show that this ionic liquid is an excellent catalyst for the synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ol) derivatives under solvent-free conditions. This method has the advantages of high yield, clean transformation, simple operation and short reaction time. The ionic liquid can be recycled without significant loss of activity.

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