Extractives from Guttiferae. Part VII. The isolation and structure of seven xanthones from Calophyllum scriblitifolium Henderson and Wyatt-Smith
- 1 January 1967
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society C: Organic
- p. 2500-2507
- https://doi.org/10.1039/j39670002500
Abstract
Two xanthones, 6-desoxyjacareubin and osajaxanthone, have been isolated from the heartwood of Calophyllum scriblitifolium Henderson and Wyatt-Smith. Methylation of a crude extract led to the isolation of the methyl ethers of another five hydroxyxanthones, 2-(3,3-dimethylallyl)-1,3,5-trihydroxyxanthone, 2-(3,3-dimethylallyl)-1,3,7 trihydroxyxanthone, 2-(3,3-dimethylallyl)-1,3,5,6-tetrahydroxyxanthone, jacareubin, and 1,5,6-trihydroxyxanthone. The biogenetic implication of the co-occurrence of these metabolites is discussed. The value of solvent shifts in assigning the structures of pyranoxanthones is assessed.Keywords
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