• Fixation of the aromatic double bonds in the coumarin ring system

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    • Keywords


      Coumarin; Acetyl Derivative; Ferric Chloride Solution; Mercuric Acetate; Hydroxy Compound

    • Abstract


      The behaviour of 7-hydroxy-coumarin indicates that there exists a double bond between 7 and 8 positions. But 7-hydroxy-4: 8-dimethyl-coumarin couples with diazocompounds and undergoes mercuration in the benzene nucleus. Its acetyl derivative undergoes the Fries migration and its allyl ether the Claisen transformation. It is therefore concluded that the nuclear double bonds are not fixed and are capable of assuming alternative positions.

    • Author Affiliations


      S Rangaswami1 T R Seshadri1

      1. Department of Chemistry, Andhra University, Waltair
    • Dates


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