Journal of Applied Polymer Science, Vol.130, No.4, 2995-3000, 2013
Preparation and characterization of polyaniline-1-hydroxyethane 1,1-diphosphonic acid salt and its application as a catalyst for the synthesis of N-benzylidine-2-phenyl imidazo[1,2-a]pyridines
A novel, efficient, and easily synthesizable catalyst, an emeraldine form of polyaniline (PANI)-1-hydroxyethane 1,1-diphosphonic acid salt (HEDP), was successfully synthesized and demonstrated as a reusable polymer-based solid acid catalyst in the synthesis of N-benzylidine-2-phenyl imidazo[1,2-a]pyridines with 2-aminopyridine with aromatic aldehydes and trimethyl silylcyanide at room temperature. PANI-HEDP was characterized by Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and conductivity measurements. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2995-3000, 2013