{[MIM-NO2]C(NO2)3} a unique nano ionic liquid: application to the synthesis of novel Biginelli-type compounds

Abstract

1-Methyl-3-nitro-1H-imidazol-3-ium trinitromethanide {[MIM-NO₂]C(NO₂)₃} as a novel and green nano structure ionic liquid (NIL) efficiently catalyzed the synthesis of 3,4-dihydropyrimidin-2(1H)-one derivatives via the one-pot Biginelli-type three-component condensation reaction of aromatic aldehydes, urea and 1,3-dione at room temperature under solvent-free conditions. Some advantages of the presented method are excellent cost effectiveness, effective catalysis and reusability of catalyst. {[MIM-NO₂]C(NO₂)₃} was fully characterized by IR, ¹H NMR, ¹³C NMR, MS, X-ray diffraction patterns (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), thermal gravimetric (TG) and derivative thermal gravimetric (DTG) analysis. We think that the described novel NIL and other homologs will be suitable sources for energetic materials. Thus the present work can open up a new and promising insight into the rational design, synthesis and applications of nano task-specific ionic liquids (NTSILs) for various green purposes. In the presented work, more than twenty products have been reported for the first time.