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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/037/04/0520-0525

    • Keywords

       

      Flavanone; Methyl Acetate; Mixed Melting Point; Dimethyl Sulphate; Synthetic Experiment

    • Abstract

       

      Heating 2-hydroxy-3∶4∶6-trimethoxy-chalkone with hydrobromic acid yields instead of the expected 7-methoxy-5∶8-dihydroxy flavanone, the isomeric 7-methoxy-5∶6-dihydroxy flavanone. The same product is obtained by the partial demethylation of 2-hydroxy-4∶5∶6-trimethoxy chalkone. Attempts to prepare 5∶8-dihydroxy-7-methoxy flavanone by the reduction of the corresponding quinone again resulted in the formation of the isomeric 7-methoxy-5∶6-dihydroxy flavanone. The 5∶8-dihydroxy compound has been obtained by the partial demethylation of 5∶7∶8-trimethoxy flavanone by means of aluminium chloride in nitrobenzene solution.

    • Author Affiliations

       

      Ishwar-Dass1 N Narasimhachari1 T R Seshadri1

      1. Department of Chemistry, Delhi University, India
    • Dates

       
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