nanosilica extracted from rice husk in Polyhydroqinilion Synthesis
الموضوعات : International Journal of Heterocyclic ChemistryAli Reza Kiasat 1 , Raziye Najafi Birgani 2
1 - Department of chemistry, College of Science, Khouzestan Science
and Research Branch, Islamic Azad University, Ahvaz, Iran
2 - Department of chemistry, College of Science, Khouzestan Science
and Research Branch, Islamic Azad University, Ahvaz, Iran
الکلمات المفتاحية: Condensation, nanosilica, Phosphosulfonic, Polyhydroquinolin, Hantzsh,
ملخص المقالة :
Phosphosulfonic acid as a multi solid site was easilyprepared from the reaction of ammonium dihydrogen phosphatewith chlorosulfonic acid in CCl4and for improved its catalyticactivity was supported nano Silica was extracted from husk ricecontains about 95% of Silica the size of extracted nano silica wasdetermined by SEM efficiency of this solid acid in four componentcondensation reaction of aromatic aldehydes, dimidone, diketon, anammonium acetate was investigated the results were clearlyshown that aldehydes having electron withdrawing and electrondonating groups were efficiently converted to the correspondingPolyhydroqinilion the high yields and short time products wereproduced at 110 0C under solvent free conditions
