RESEARCH ARTICLE

 

Nano-Fe₃O₄/O₂: Green, magnetic and reusable catalytic system for the synthesis of benzimidazoles

 

 

Mohammad Ali Zolfigol^{I, *}; Vahid Khakyzadeh^I; Ahmad Reza Moosavi-Zare^II; Abdolkarim Zare^III; Parastoo Arghavani-Hadi^I; Zahra Mohammadi^I; Mohammad Hassan Beyzavi^IV

^IFaculty of Chemistry, Bu-Ali Sina University, Hamedan 6517838683, Iran
^IIUniversity of Sayyed Jamaloddin Asadabadi, Asadabad, 6541835583, Iran
^IIIChemistry Department, Payame Noor University, 19395-4697 Tehran, Iran
^IVInstitut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany

 

 

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ABSTRACT

Magnetic nano-Fe₃O₄ was applied in the presence of atmospheric air as a green, efficient, heterogeneous and reusable catalytic system for the synthesis of benzimidazoles via the reactions of o-phenylenediamine (1 eq) with aryl aldehydes (1 eq) in excellent yields (85-97 %) and short reaction times (30-100 min) with a proposed mechanism.

Keywords: Benzimidazole, benzene-1,2-diamine, aldehyde, nano-Fe₃O₄, heterogeneous catalyst, magnetite, O₂

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Received 25 May 2012
Revised 28 October 2012
Accepted 21 November 2012

 

 

* To whom correspondence should be addressed. E-mail: mzolfigol@yahoo.com