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Flavone
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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Flavone sind gelbe Pflanzenfarbstoffe, die als Derivate des Flavons zur Klasse der Flavonoide zΓ€hlen. Es sind ca. 300 natΓΌrlich vorkommende Flavone bekannt. Wie andere Flavonoide kommen die meisten Flavone als wasserlΓΆsliche Glycoside vor, z. B. Scutellarin. Sie treten vielfach als Copigmente der Anthocyane auf. Das Zusammenspiel beider Farbstofftypen erklΓ€rt das gleichzeitige Auftreten von Gelb und Rot in verschiedenen BlΓΌten.cite-ref-hunnius-1-0[1]
Die Flavone sind ferner auch als Derivate des Chromons aufzufassen.
Contents
β’ Beispiele
β’ Einzelnachweise
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Beispiele
| Name | Struktur | R 5 | R 6 | R 7 | R 3' , R 5' | R 4' |
|---|---|---|---|---|---|---|
| Apigenin | | βOH | β | βOH | βH, βH | βOH |
| Acacetin | | βOH | β | βOH | βH, βH | βOCH 3 |
| Genkwanin | | βOH | β | βOCH 3 | βH, βH | βOH |
| Luteolin | | βOH | β | βOH | βH, βOH | βOH |
| Chrysoeriol | | βOH | β | βOH | βH, βOCH 3 | βOH |
| Diosmetin | | βOH | β | βOH | βH, βOH | βOCH 3 |
| Tricetin | | βOH | β | βOH | βOH, βOH | βOH |
| Tricin | | βOH | β | βOH | βOCH 3 , βOCH 3 | βOH |
| Scutellarein | | βOH | βOH | βOH | βH, βH | βOH |
| Eupatorin | | βOH | βOCH 3 | βOCH 3 | βH, βOH | βOCH 3 |
| Sinensetin | | βOCH 3 | βOCH 3 | βOCH 3 | βH, βOCH 3 | βOCH 3 |
| Chrysin | | βOH | β | βOH | βH, βH | β |
| Tectochrysin | | βOH | β | βOCH 3 | βH, βH | β |
Einzelnachweise
cite-note-hunnius-11. β Hermann Ammon (Hrsg.): Hunnius pharmazeutisches WΓΆrterbuch. 8. Auflage, de Gruyter, Berlin 2004. ISBN 3-11-015792-6.
cite-note-r-mpp-21. Eintrag zu Flavone. In: RΓΆmpp Online. Georg Thieme Verlag, abgerufen am 10. Dezember 2014.
cite-note-32. Matthias Melzig, Eberhard Teuscher und Ulrike Lindequist: Biogene Arzneimittel: Ein Lehrbuch der Pharmazeutischen Biologie. Wissenschaftliche Verlagsgesellschaft; 6. vΓΆllig neu bearb. Auflage 2004; ISBN 3-8047-2073-0; S. 305.