By Andrew G. Mercader, Alicia B. Pomilio
Biflavonoids include a gaggle of the flavonoid kin that own various buildings and organic actions of excessive relevance, corresponding to anticancer, antibacterial, antifungal, antiviral, anti inflammatory, antinociceptive, antioxidant, vasodilator and anticlotting. The chemistry of biflavonoids is essential in lots of fields of analysis, specially simply because those compounds are structurally various bioactive molecules with strength for biomedical functions. This ebook highlights the structural biflavonoid variability, rearrangements and varied stereochemistry via approximately 470 constructions dispensed in a few species of Angiosperms, Gymnosperms, ferns and mosses.
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Extra resources for Biflavonoids: Occurrence, Structural Features and Bioactivity
Pomilio 52 (I-3,II-3’)-Flavanone-chalcone dimer OH HO OH O I 3 OH OH O 3' O II HO OH I-5,7,4’-Trihydroxyflavanone-(I-3,II-3’)-II-4,2’,4’,6’-tetrahydroxychalcone (287) (I-3,II-3)-Flavanone-chalcone dimers OH R2 O O O I OH 3 3 II O O HO R1 OH I-5-Hydroxylophirone B I-5-Hydroxylophirone B I-7-O-β-D-glucopyranoside (288) (289) R1 H H R2 H β-D-Glu OH HO O O I 3 O OH 3 II HO OH Lophirone B (290) Biflavonoid Structures 53 (I-3,II-3)-Flavan-chalcone dimer OH HO O O I OH 3 3 II HO OH Bongosin (291) Figure 16.
SIMPLE BIFLAVONOIDS: (I-5′,II-5′)-Biflavanonol, (I-3′,II-3)-FlavoneFlavanone, (I-3′,II-7)-Flavononol-flavone, (I-3′,O,II-7)-Flavone-isoflavone, (I-3′,O,II4′)-Biflavones, (I-3′,O,II-4′)-Flavanone-flavone dimers, (I-3′,O,II-4′)-Flavoneflavanone dimers, (I-3′,O,II-4′)-Biflavanones, (I-3′,O,II-4′)-Biflavanonol. The (I-4′,O,II-3′)-series includes a (I-4′,O,II-3′)-flavone-flavanonol dimer (231); and a (I-4′,O,II-3′)-biflavanonol (232). Loniflavone shows a (I-4′,O,II4′) connection (233,234). Hinokiflavone series with (I-4′,O,II-6)-biflavonoids contains (I-4′,O,II-6)-biflavones (235-240), (I-4′,O,II-6)-flavanone-flavone dimers (241,242), (I-4′,O,II-6)-flavone-flavanone dimers (243-246), and (I4′,O,II-6)-biflavanones (247,248).
Mercader and Alicia B. Pomilio (I-4′,O,II-8)-Biflavones O O 4' R O O O 8 II O HO I R1 OH OH O Lanaroflavone I-7-O-Methyllanaroflavone I-7,II-4′-Di-O-methyllanaroflavone (249) (250) (251) R H Me Me R1 H H Me (I-3,O,II-4′)-Biflavone OH HO O I 3 O 4' OH O O II O R O OH Delicaflavone I-5,7,4',II-5-Tetrahydroxy-II-7-methoxy-(I-3,O,II-4')-biflavone (252) (253) R H Me Biflavonoid Structures 43 (I-6,O,II-7)-Biflavone O O II I O O 7 6 O (I-6,O,II-7)-Biflavone (253a) (I-6,O,II-7)-Biflavanone O OH OH HO O II I O 7 O 6 OH O HO Masazinoflavanone (254) (I-6,O,II-8)-Biflavone OH O I HO O 6 HO O O 8 II O OH OH OH (I-6,O,II-8)-Biapigenin (255) 44 Andrew G.