Alireza kiasat
Rshid Badri
Raziye Najafi Birgani

Poly vinyl sulfonic acid as a multi solid site was easily prepared from the reaction of poly vinyl alcoholand choloro sulfonic acid in CCl۴ , at room temperature and for improved its catalytic activity wassupported on nano silica. Efficiency of this solid acid in four components condensation reaction ofaromatic aldehydes, dimidone, ethyl aceto acetate and ammonium acetate were investigated. Aldehydeshaving electron withdraving and electron donating groups were efficiently converted to the correspondingpolyhydroqinilion. According to results, the high yields of products were obtouned in short reaction timeat ۱۱۰۰C under solvent free conditions.

Nanosilica, Polyhydroquinolin, Hantzsh condensation, Poly vinyl sulfonicacid, nano silica