Aurone
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An aurone is a heterocyclic chemical compound, which is a type of flavonoid.[1] There are two isomers of the molecule, with (E)- and (Z)-configurations. The molecule contains a benzofuran element associated with a benzylidene linked in position 2. In aurone, a chalcone-like group is closed into a 5-membered ring instead of the 6-membered ring more typical of flavonoids.
Aurone derivatives
Aurone forms the core for a family of derivatives which are known collectively as aurones. Aurones are plant flavonoids that provide yellow color to the flowers of some popular ornamental plants, such as snapdragon and cosmos.[2] Aurones including 4'-chloro-2-hydroxyaurone (C15H11O3Cl) and 4'-chloroaurone (C15H9O2Cl) can also be found in the brown alga Spatoglossum variabile.[3]
Most aurones are in a (Z)-configuration, which is the more stable configuration according to Austin Model 1 computation.[3] But there are also some in the (E)-configurations such as (E)-3'-O-β-d-glucopyranosyl-4,5,6,4'-tetrahydroxy-7,2'-dimethoxyaurone, found in Gomphrena agrestis.[4]
Biosynthesis
Aurones are biosynthesized starting from coumaryl-CoA.[5] Aureusidin synthase catalyzes the creation of aurones from chalcones through hydroxylation and oxidative cyclization.[2]
Applications
Some aurone derivatives possess antifungal properties[6] and analogy with flavonoids suggests that aurones could have other biological properties.[7]
Related compound examples
- Aureusidin
- Hispidol (6,4'-dihydroxyaurone)[8]
- Leptosidin
- Sulfuretin (6,3',4'-trihydroxyaurone)
- 4,5,6-Trihydroxyaurone
References
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- ↑ Hispidol on metabolomics.jp
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