caa a22 4500 44538834X CHVBK 20180317143038.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s11144-011-0345-9 doi (NATIONALLICENCE)springer-10.1007/s11144-011-0345-9 12-Tungstophosphoric acid supported on nano sized MCM-41 as an efficient and reusable solid acid catalyst for the three-component imino Diels-Alder reaction [Elektronische Daten] [Mohammad Abdollahi-Alibeik, Marjan Pouriayevali] One pot three-component imino Diels-Alder reactions of various types of aldehydes, aniline and dihydropyrane were studied in the presence of nano sized MCM-41 supported 12-tungstophosphoric acid (TPA) as solid acid catalyst. MCM-41 as solid support was synthesized in nano size and the catalysts with different loading amounts of TPA (5-30 wt%) were prepared and characterized by XRD, FT-IR and SEM techniques. The results confirm a good dispersion of the heteropoly acid on the solid supports and based on the experimental results, the catalyst with 10 wt% heteropoly acid shows the best catalytic activity using 0.5mol% heteropoly acid relative to the aldehyde. The recovery experiments show that the catalyst is reusable after calcination without significant loss in its activity. Akadémiai Kiadó, Budapest, Hungary, 2011 12-Tungstophosphoric acid nationallicence Imino Diels-Alder nationallicence Tetrahydroquinoline nationallicence Heteropoly acid nationallicence Nano sized MCM-41 nationallicence Abdollahi-Alibeik Mohammad Department of Chemistry, Yazd University, 89195-741, Yazd, Iran aut Pouriayevali Marjan Department of Chemistry, Yazd University, 89195-741, Yazd, Iran aut Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 104/1(2011-10-01), 235-248 1878-5190 104:1<235 2011 104 11144 https://doi.org/10.1007/s11144-011-0345-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11144-011-0345-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Abdollahi-Alibeik Mohammad Department of Chemistry, Yazd University, 89195-741, Yazd, Iran aut NATIONALLICENCE 700 1- Pouriayevali Marjan Department of Chemistry, Yazd University, 89195-741, Yazd, Iran aut NATIONALLICENCE 773 0- Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 104/1(2011-10-01), 235-248 1878-5190 104:1<235 2011 104 11144 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer