Alireza Kiasat
Hossein Almasi - Chemistry Department, College of Science, Shahid Chamran University, Ahvaz ۶۱۳۵۷-۴-۳۱۶۹, Iran
Seyyed Jafar Saghanezhad - ACECR-Production Technology Research Institute, Ahvaz, Iran

Phosphosulfonic acid (PSA) was found to be an efficient catalyst for the one-pot three-component Hantzsch condensation reaction of arylaldehydes, ethylacetoacetate and ammonium acetate to afford the corresponding ۱,۴-dihydropyridine and polyhydroquinoline derivatives in high yields. PSA was also applied for the one-pot preparation of polyhydroquinolines via four-component reaction of arylaldehydes, ethylacetoacetates, dimedone and ammonium acetate. The main advantages of the present approach are short reaction times, clean reaction profiles, catalyst recyclability, and facile experimental and workup procedures.

۱, ۴-dihydropyridines, Polyhydroquinolines, Phosphosulfonic acid, Recyclable heterogeneous catalyst, Solvent-free conditions