• Condensation ofo-benzoquinone with 4-hydroxy coumarins: A new synthesis of 3 aryl-4-hydroxy coumarins and coumestans

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    • Keywords


      Dihydroxy phenyl; hydroxy coumarins; dihydroxy coumestans; o-benzoquinone condensation

    • Abstract


      The 4-hydroxy coumarins have been reacted witho-benzoquinone, in acetone in the absence of the oxidant potassium ferricyanide. The products were found to be 3-aryl-4-hydroxy coumarins which were cyclised to the corresponding 11,12-dihydroxy coumestans. The structure of 11,12-dihydroxy coumestan has been confirmed by an unambiguous synthesis. The structures of other compounds were confirmed on the basis of their analytical, chemical and spectral data.

    • Author Affiliations


      K Srihari1 V Sundaramurthy1

      1. Department of Chemistry, Osmania University, Hyderabad - 500 007, India
    • Dates

  • Journal of Chemical Sciences | News

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