• Fixation of the aromatic double bonds in the chromones

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      https://www.ias.ac.in/article/fulltext/seca/009/01/0001-0006

    • Keywords

       

      Chromones; Anhydrous Potassium Carbonate; Hydroxyflavone; Thin Rectangular Plate; Allyl Ether

    • Abstract

       

      7-Allyloxyflavone undergoes Claisen transformation to form 8-allyl-7-hydroxyflavone, the constitution of which is established from its synthesis from 3-allyl-resacetophenone. The bond distribution should therefore be as in (I). However 8-alkyl substituted derivatives undergo coupling with diazotisedp-nitraniline to form dyes and 7-allyloxy-8-allylflavone undergoes further transformation to form 6: 8-diallyl-7-hydroxy-flavone. Closely analogous results are obtained from 2-methyl-3-methoxy-7-hydroxychromone. It is therefore concluded that though the chromones generally reat in form (I) the alternative disposition of the bonds (IV) is not precluded.

    • Author Affiliations

       

      S Rangaswami1 T R Seshadri1

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

       
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