RESEARCH ARTICLE

 

Iodination of alcohols over Keggin-type heteropoly compounds: A simple, selective and expedient method for the synthesis of alkyl lodides

 

 

Ezzat Rafiee^{I,II, *}; Houri Mahdavi^I; Mohammad Joshaghani^{I, II}

^IFaculty of Chemistry, Razi University, Kermanshah, 67149, Iran
^IIKermanshah Oil Refining Company, Kermanshah, Iran

 

 

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ABSTRACT

Different catalysts derived from Keggin-type heteropoly compounds were prepared and their catalytic activities have been compared in the iodination of benzyl alcohol with KI under mild reaction conditions. A high catalytic activity was found over tungstophosphoric acid supported on silica and titania. The effect of catalyst loading, iodine source and the nature of substituents on the aromatic ring of benzyl alcohol were investigated. Finally, several competitive reactions were studied between structurally diverse alcohols. This protocol provides a mild and expedient way for the conversion of various alcohols to their corresponding alkyl iodides with high selectivity.

Keywords: Keggin-type heteropoly compounds, supported catalyst, alcohols, alkyl iodides, potassium iodide

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Acknowledgements

We thank the Razi University Research Council and Kermanshah Oil Refining Company for support of this work.

 

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Received 10 May 2010
Revised 24 August 2010
Accepted 24 August 2010

 

 

* To whom correspondence should be addressed. E-mail: ezzat_rafiee@yahoo.com / e.rafiei@razi.ac.ir