Sara Fallah Ghasemi Gildeh - Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran
Morteza Mehrdad, - Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran
Hossein Roohi, - Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran
Kurosh Rad-Moghadam - Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran
Khatereh Ghauri - Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran

Ionic liquids (ILs) are a fascinating class of low melting salts that generally are composed of large unsymmetrical organic cation and a weakly-coordinating inorganic or organic anion.1,2 At first, we synthesized two aprotic ionic liquids composed of 1,8-diazobicyclo [5.4.0] undec-7-ene-8-benzylium ([Bn-DBU]+) cation and [CH3CO2]− and [CF3CO2]− anions and characterized experimentally by the combined of 1HNMR and FTIR spectroscopies, and thermogravimetric analysis (TGA).The study of the various properties of N-substituted DBU-based ILs proved the advantages and uniqueness of these ILs as catalyst in different organic reactions.3,4 In the following, we use the [Bn-DBU][Y1-2], (Y = CH3CO2 and CF3CO2) ILs as catalyst in synthesis of 1H-pyrazolo [1, 2-b] phthalazine-5, 10-diones from reaction phthalhydrazid, aromatic aldehyde and malononitrile under solvent free condition at 100 °C.

Ionic liquid, 1,8-diazobicyclo [5.4.0] undec-7-ene-8-benzylium, 1HNMR, FTIR