Chemistry of pongamol. Part I

  • S. Rangaswami
  • T. R. Seshadri


Pongamol, which is the second important crystalline component of the pongamia oil, has the molecular formula C18H14O4 and contains a methoxyl group. It has also a phenolic or enolic hydroxyl group. Demethylation with aluminium chloride yields nor-pongamol whereas treatment with hydriodic acid gives rise to a product which is probably isomeric but does not possess phenolic properties. Treatment with bromine produces a tetrabromo derivative which on boiling with acetone yields a tribromo compound. Oxidation with potassium permanganate or decomposition with alkali yields benzoic acid. From these properties and from colour reactions it is suggested that pongamol is a flavone derivative containing a hydroxyl, a methoxyl and an ethylene double bond.


Ferric Chloride Potassium Permanganate Hydriodic Acid Anhydrous Aluminium Chloride Alcoholic Ferric Chloride 
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  1. 1.
    Rangaswami and SeshadriCurr. Sci., 1940, 179.Google Scholar
  2. 2.
    Indian J. Pharm., 1941,3, 3.Google Scholar
  3. 3.
    WilsonJ. Am. C. S., 1939, 2303.Google Scholar

Copyright information

© Indian Academy of Sciences 1942

Authors and Affiliations

  • S. Rangaswami
    • 1
  • T. R. Seshadri
    • 1
  1. 1.Departments of Chemistry, and Chemical TechnologyAndhra UniversityWaltair

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