Chemistry of Pongamol- Part I

Rangaswami, S. ; Seshadri, T. R. (1942) Chemistry of Pongamol- Part I Proceedings of the Indian Academy of Sciences, Section A, 15 (6). pp. 417-423. ISSN 0370-0089

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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.

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