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South African Journal of Chemistry

versión On-line ISSN 1996-840X
versión impresa ISSN 0379-4350

S.Afr.j.chem. (Online) vol.64  Durban  2011

 

RESEARCH ARTICLE

 

Highly efficient method for solvent-free synthesis of diarylmethane and triarylmethane from benzylic alcohols using P2O5/Al2O3 or P2O5/SiO2 at room temperature

 

 

Ardeshir KhazaeiI, *; Mohammad Navid Soltani RadII, *; Maryam Kiani BorazjaniI, III; Khadijeh Mansouri MoradianI; Mohammad Kiani BorazjaniIII; Mohammad Hassan ZebarjadianI

IFaculty of Chemistry, Bu-Ali Sina University, P.O. Box 651783868, Hamedan, Iran
IIDepartment of Chemistry, Shiraz University of Technology, Shiraz 71555-313, Iran
IIITarbiat Moalem Allameh Ta"ata"ai, P.O. Box 7515658585, Boushehr, Iran

 

 


ABSTRACT

A highly efficient procedure for the synthesis of triarylmethane and diarylmethane via benzylation of aromatic hydrocarbons from benzyl alcohols using supported P2O5 on SiO2 and/or Al2O3 under solvent-free conditions is described. Excellent yields of triarylmethane and diarylmethane were obtained using P2O5-SiO2 (50 % W/W) and/or P2O5-Al2O3 (50 % W/W) at room temperature. The reusability of both supported P2O5 on SiO2 and Al2O3 were examined. Both supported reagents show favorable activities in first and second runs, however, a decline in reactivity was observed in following attempts. The reaction is scalable to >0.03 mole amounts.

Keywords: Diarylmethane, triarylmethane, aromatic alcohol, P2O5, silica gel, alumina


 

 

Full text available only in pdf format.

 

Acknowledgement

The authors acknowledge to Bu-Ali Sina University Research Council and Center of Excellence in Development of Chemical Methods (CEDCM) for support of this work.

 

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Received 14 July 2010
Revised 25 February 2011
Accepted 10 August 2011

 

 

* To who correspondence should be addressed. E-mail: a_khazaei1326@basu.ac.ir; khazaei_1326@yahoo.com; soltani@sutech.ac.ir; nsoltanirad@gmail.com

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