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  • Chem Sci Trans., 2013, 2(3),  pp 739-748  

    DOI:10.7598/cst2013.410

    Research Article

    One-Pot Synthesis of Xanthones and Dixanthones Using Calix[4]arene Sulfonic Acid Under Solvent Free Condition

  • MOSLEM MANSOUR LAKOURAJ,* HAMED TASHAKKORIAN and MONA ROUHI
  • Department of Organic Chemistry, Faculty of Chemistry, University of Mazanadaran, Babolsar -47416, Iran
    Department of Public Health, Faculty of Paramedical, Babol University of Medical Sciences, I. R. Iran
  • Abstract

    An efficient and convenient methodology is introduced for preparation of xanthones and dixanthones through direct coupling of salicylic acids and phenols. It is based on the use of POCl3 and catalytic amount of calix[4]arene sulfonic acid as a highly thermally stable and recyclable organocatalyst. A variety of salicylic acids and phenols were treated with POCl3 and the catalyst in the absence of solvent at 80 oC which afforded the corresponding xanthones in good to high yields.

    Keywords

    Xanthone, Calix[4]arene Sulfonic Acid, Solvent-free, Catalysis, Ring closure, One-pot synthesis

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