2-Aminoethanesulfonic acid immobilized on epichlorohydrin functionalized Fe3O4@WO3 (Fe3O4@WO3-EAE-SO3H (III)): A heterogeneous and reusable nanocatalyst for synthesis of α , α '-bis (substituted-benzylidene) cycloalkanones in solvent-free conditions

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Karimzadegan Hanieh; AKHLAGHINIA BATOOL; Ghasemzadeh Maryam Sadat

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ISSN: 2588-4824

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Journal: IRANIAN JOURNAL OF CATALYSIS Year:2019 | Volume:9 | Issue:2 Page(s): 109-120

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Title

2-Aminoethanesulfonic acid immobilized on epichlorohydrin functionalized Fe3O4@WO3 (Fe3O4@WO3-EAE-SO3H (III)): A heterogeneous and reusable nanocatalyst for synthesis of α , α '-bis (substituted-benzylidene) cycloalkanones in solvent-free conditions

Author(s)

Karimzadegan Hanieh | AKHLAGHINIA BATOOL | Ghasemzadeh Maryam Sadat | Issue Writer Certificate

Keywords

α'-Bis (substituted-benzylidene) cycloalkanones

Aldehyde

Cycloalkanone

Abstract

A green, efficient, chemoselective, facile and clean procedure is described and discussed for the synthesis of α , α '-bis (substitutedbenzylidene) Cycloalkanones in solvent-free conditions. The condensation reaction was carried out through the reaction of aromatic Aldehydes with Cycloalkanones in the presence of Fe3O4@WO3 (Fe3O4@WO3-EAE-SO3H (III)) nanoparticles as the catalyst. The nanostructured catalyst with the spherical shape, particle size in the range of 7-23 nm and superparamagnetic behavior may be referred as an excellent replacement for Brø nsted acids. The reaction proceeds rapidly at room temperature, giving high yields of products. No self-condensation product was produced. Easy separation of the catalyst from the reaction mixture by means of an external magnetic field and re-using up to seven times without loss of activity are the salient features of the present method.

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