Mokhtari, T. S.; Sheibani, H.; Amrollahi, M. A.; Sheikhhosseini, E. Poly (4-Vinylpyridine) and Polyaniline: As Efficient and Commercial Available Basic Catalysts for the Synthesis of N-Amino-2-Pyridones under Thermal Conditions or Microwave Irradiation. JAC 2014, 10, 2101-2106.