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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/045/05/0293-0297

    • Keywords

       

      Coumarin; Benzophenone; Methyl Ether; Hydrobromic Acid; Anhydrous Potassium Carbonate

    • Abstract

       

      Though the benzophenone method of synthesis is not quite advantageous for dalbergin and methyl dalbergin, it is more convenient for the preparation of allo-dalbergin (4-phenyl-5-methoxy-6-hydroxy coumarin) and its methyl ether. These compounds and other 4-phenyl coumarins give markedly coloured solutions when treated with alcohol, hydrochloric acid and magnesium; a number of 4-methyl coumarin derivatives also give similar colour reactions. On the other hand 3-phenyl and 3-phenyl-4-methyl coumarin derivatives do not respond to this test which may therefore be of diagnostic value.

    • Author Affiliations

       

      V K Ahluwalia1 A C Mehta1 T R Seshadri1

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

       
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