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    South African Journal of Chemistry

    On-line version ISSN 1996-840XPrint version ISSN 0379-4350

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

     

    RESEARCH ARTICLE

     

    [H2-cryptand 222]2+(Br3-)2 as a tribromide-type catalyst for the trimethylsilylation/tetrahydropyranylation of alcohols

     

     

    Gholamabbas ChehardoliI, *; Mohammad Ali ZolfigolII; Vahid KhakyzadehII; Hadi GholamiKII; Khodabakhsh NiknamIII

    ISchool of Pharmacy, Hamedan University of Medical Sciences, 65178 Hamedan, Iran
    IIFaculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran
    IIIDepartment of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr 75169, Iran

     

     


    ABSTRACT

    A stable organic tribromide, [H2-cryptand 222]2+(Br3-)2 was utilized as an active catalyst for the trimethylsilylation/ tetrahydropyranylation of alcohols. The method is general for the preparation of OH-protected aliphatic (acyclic and cyclic), aromatic, primary, secondary and tertiary alcohols.

    Keywords: [H2-cryptand 222]2+(Br3-)2, trimethylsilylation, tetrahydropyranylation, alcohols, tribromide, TMS-ether, THP-ether


     

     

    Full text available only in pdf format.

     

    Acknowledgements

    This paper was extracted from the M.Sc. thesis of Vahid Khakyzadeh. The authors acknowledge financial support for this work from the research affairs of Hamedan University of Medi-calSciences,Hamedan,I.R. Iranandpartialsupportofthis work by the Research Affairs Office of Bu-Ali Sina University (Grant number 32-1716 entitled development of chemical methods, reagent and molecules.),and also Center ofExcellence inDevelopment of Chemical Method (CEDCM) Hamedan, I.R. Iran.

     

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    Received 16 May 2011
    Revised 8 July 2011
    Accepted 21 July 2011

     

     

    * To who correspondence should be addressed. E-mail: chehardoli@umsha.ac.ir; cheh1002@gmail.com