A novel example of a natural 2,5-dihydroxyflavanone from Unona lawii

Chopin, J. ; Hauteville, M. ; Joshi, B. S. ; Gawad, D. H. (1978) A novel example of a natural 2,5-dihydroxyflavanone from Unona lawii Phytochemistry, 17 (2). pp. 332-334. ISSN 0031-9422

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00319...

Related URL: http://dx.doi.org/10.1016/S0031-9422(00)94186-4


3-Formyl-2,4,6-trihydroxy-5-methyldibenzoylmethane from Unona lawii has been shown to exist in a cyclic hemiketal form whereas 3-formyl-2,6-dihydroxy-4-methoxy-5-methyldibenzoylmethane from the same plant mainly exists in the enolic ring opened form, owing to chelation of both hydroxyl groups. The flavonoid pattern of Unona lawii suggests the biogenetic scheme : flavanone →2-hydroxyflavanone → flavone. 3-Formyl-2,4,6-trihydroxy-5-methyldibenzoylmethane has been synthesized by Baker-Venkataraman rearrangement of 3-formyl-2,4,6-tri-hydroxy-5-methylacetophenone benzoate.

Item Type:Article
Source:Copyright of this article belongs to Phytochemical Society of Europe.
Keywords:Unona lawii; Anonaceae; 3-formyl-2,4,6-trihydroxy-5-methyldibenzoylmethane; 6 (or 8)-formyl-2,5,7-trihydroxy-8 (or 6)-methylflavanone; 3-formyl-2,6-dihydroxy-4-methoxy-5-methyldibenzoylmethane; Synthesis
ID Code:15004
Deposited On:13 Nov 2010 13:09
Last Modified:03 Jun 2011 04:38

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