Orphan flavonoids and dihydrochalcones from Primula exudates.
Two orphan flavonoids containing an oxepin structure in ring A and named as Primcortusin (1) and 3'-OH-Primcortusin (2) were isolated from leaf exudates of Primula cortusoides, while P. glutinosa exudates yielded two dihydrochalcone derivatives (3,4). These novel structures have not been detected in other species of Primula so far. Chemical structures were elucidated by 2D NMR and mas spectrometry. The nature of compounds 1 and 2 is discussed, and ideas about their possible origin and that of unsubstituted flavone and other irregular substituted Primula flavones are presented.
Chemodiversity Research Group, Dept. of Systematic and Evolutionary Botany, Institute of Botany, University of Vienna, Rennweg 14, A-1030 Vienna, Austria. tshering.doma.bhutia@univie.ac.at
Tshering Doma
TD
Bhutia
Karin M
KM
Valant-Vetschera
Lothar
L
Brecker
D047188:Chalcones / Q000737:chemistry / Q000302:isolation & purification*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D053147:Plant Exudates / Q000737:chemistry; D031825:Primula / Q000737:chemistry*
D047188:Chalcones; D005419:Flavonoids; D053147:Plant Exudates; C015812:dihydrochalcone