Phytochemistry p. 985 - 988 (1992)
Update date:2022-08-29
Topics:
Roitman, James N.
Mann, Karin
Wollenweber, Eckhard
Fronds of various ferns in the genus notholaena produce an exudate which consists mostly of flavonoid aglycones.In some species we found small amounts of two dibenzoylmethanes or β-diketones.These have been identified by spectroscopic methods.Both, 2',β,4-trihydroxy-4',6'-dimethoxychalcone and 2',β-dihydroxy-4',6',4-trimethoxychalcone, are novel natural products.The structures have been confirmed by synthesis of the latter compound. Key words: Notholaena; Pteridaceae; frond exudates; β-diketones; 2',β,4-trihydroxy-4',6'-dimethoxychalcone; 2',β-dihydroxy-4',6',4-trimethoxychalcone; 2',4'-dihydroxy-4',6'-dimethoxydibenzoylmethane, 2'-hydroxy-4',6',4-trimethoxydebenzoylmethane.
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