• Insecticidal properties and chemical constitution - Part VI. Some phenyl and halogen substituted coumarins

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    • Keywords


      Coumarin; Chromone; Anhydrous Potassium Carbonate; Insecticidal Property; Dimethyl Sulphate

    • Abstract


      A number of phenyl and halogen substituted coumarins with substituents in different positions have been examined as fish poisons. The presence of a phenyl group in the 3 or 4 position or a halogen atom in the 3-position seems to be most favourable. Higher substitution does not appreciably enhance the toxic properties. In consonance with previous results, a hydroxyl group in the 5-position seems to produce greater toxicity than one in the 7-position.

    • Author Affiliations


      T R Seshadri1 S Varadarajan1

      1. From the Department of Chemistry, Delhi University, Delhi
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