Synthesis 2014; 46(07): 917-922
DOI: 10.1055/s-0033-1338595
paper
© Georg Thieme Verlag Stuttgart · New York

Magnetite–Sulfuric Acid Magnetic Nanoparticles: Preparation and Applica­tion in Synthesis of Mono-, Bis-, and Tris-14H-Dibenzo[a,j]xanthen-14-yl­arenes under Solvent-Free Conditions

Ali Reza Karimi*
Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran   Fax: +98(861)4173406   eMail: a-karimi@araku.ac.ir
,
Zeinab Dalirnasab
Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran   Fax: +98(861)4173406   eMail: a-karimi@araku.ac.ir
,
Marzie Karimi
Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran   Fax: +98(861)4173406   eMail: a-karimi@araku.ac.ir
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Publikationsverlauf

Received: 28. Oktober 2013

Accepted after revision: 12. Januar 2014

Publikationsdatum:
11. Februar 2014 (online)


Abstract

Novel magnetite–sulfuric acid (Fe3O4·SO3H) magnetic nanoparticles were prepared by the direct reaction of chlorosulfonic acid with magnetite nanoparticles, and characterized by IR spectroscopy, thermogravimetric analysis, X-ray diffraction, and scanning electron microscopy. The catalytic activity of the Fe3O4·SO3H nanoparticles in the reaction of 2-naphthol with aryl mono-, di- and trialdehydes was examined, and these catalysts were shown to exhibit remarkable catalytic performance in the solvent-free synthesis of mono-, bis-, and tris-14H-dibenzo[a,j]xanthen-14-ylarenes. The catalyst retained its activity for several cycles.

Supporting Information