Research Article

Nanosphere of Semicrystalline Polyaniline Powder: An Effective, Versatile, and Reusable Catalyst for Hantzsch Reaction

Table 1

Synthesis of 1,4-dihydropyridine by PANI-HEDP at ambient temperature in different mediuma.

EntrySolventTime (h)Isolated
yield (%)

1H2O434
2CH3CN288
3CH2Cl2260
4No solvent0.1693

Ethyl acetoacetate (4 mmol), 4-chlorobenzaldehyde (2 mmol), ammonium acetate (3 mmol), and PANI-HEDP catalyst (40 mg).