Journal of Molecular Catalysis A-Chemical, Vol.416, 63-72, 2016
Design of multifaceted acidic 1,3-disulfoimidazolium chlorometallate ionic systems as heterogeneous catalysts for the preparation of beta-amino carbonyl compounds
A new series of 1,3-disulfoimidazolium transition metal chloride systems: [Dsim](2)[ZnCl4], [Dsim][FeCl4] and [Dsim](2)[NiC14] were synthesized as Bronsted-Lewis acidic solid material and characterized via NMR, FT-IR, Raman, TGA, SEM, EDX, Powder XRD, UV-visible, ICP-OES and elemental analysis. Semiconductor properties of these materials were studied through electronic spectroscopy. The Bronsted acidity of these systems was determined from Hammett plot. All these three materials were successfully tested as reusable catalyst for the one pot three component Mannich-type syntheses of beta-amino carbonyl compounds within considerable time frame. (C) 2016 Elsevier B.V. All rights reserved.