Flavanol-anthocyanin adduct

Chemical structure of malvidin glucoside-ethyl-catechin, a type of flavanol-anthocyanin adduct

Flavanol-anthocyanin adducts are formed during wine ageing through reactions between anthocyanins and tannins present in grape, with yeast metabolites such as acetaldehyde. Acetaldehyde-induced reactions yield ethyl-linked species such as malvidin glucoside-ethyl-catechin.[1][2]

This type of compound has a better color stability at pH 5.5 than normal anthocyanins. When the pH was increased from 2.2 to 5.5, the solution of the pigment became progressively more violet (λmax = 560 nm at pH 5.5), whereas similar solutions of the anthocyanin were almost colorless at pH 4.0.[3]

References

  1. ^ Morata, A; González, C; Suárez-Lepe, JA (2007). "Formation of vinylphenolic pyranoanthocyanins by selected yeasts fermenting red grape musts supplemented with hydroxycinnamic acids". International Journal of Food Microbiology. 116 (1): 144–52. doi:10.1016/j.ijfoodmicro.2006.12.032. PMID 17303275.
  2. ^ Asenstorfer, Robert E.; Lee, David F.; Jones, Graham P. (2006). "Influence of structure on the ionisation constants of anthocyanin and anthocyanin-like wine pigments". Analytica Chimica Acta. 563 (1–2): 10–14. doi:10.1016/j.aca.2005.09.040.
  3. ^ Escribano-Bailón, Teresa; Álvarez-García, Marta; Rivas-Gonzalo, Julian C.; Heredia, Francisco J.; Santos-Buelga, Celestino (2001). "Color and Stability of Pigments Derived from the Acetaldehyde-Mediated Condensation between Malvidin 3-O-Glucoside and (+)-Catechin". Journal of Agricultural and Food Chemistry. 49 (3): 1213–7. doi:10.1021/jf001081l. PMID 11312838.

See also

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Anthocyanidins and their anthocyanin glucosides
3-Hydroxyanthocyanidins
  • 5-Desoxy-peonidin
  • Aurantinidin
  • Cyanidin
  • 6-Hydroxycyanidin
  • Delphinidin
  • Fisetinidin
  • Guibourtinidin
  • Pelargonidin
  • Robinetinidin
3-DeoxyanthocyanidinsO-Methylated anthocyanidinsAnthocyanins
(anthocyaninidin glycosides)
Glucosides:
  • Callistephin (Pelargonidin 3-O-glucoside)
  • Chrysanthemin (Cyanidin 3-O-glucoside)
  • Myrtillin (Delphinidin 3-O-glucoside)
  • Oenin (Malvidin 3-O-glucoside)
  • Peonidin 3-O-glucoside
  • Petunidin 3-O-glucoside
  • Pulchellidin 3-glucoside

Diglucosides:

  • Cyanin (Cyanidin 3,5-O-diglucoside)
  • Delphin (Delphinidin 3,5-O-diglucoside)
  • Malvin (Malvidin 3,5-diglucoside)
  • Pelargonin (Pelargonidin 3,5-O-diglucoside)
  • Peonin (Peonidin 3,5-O-diglucoside)
  • Petunin (Petunidin 3,5-O-diglucoside)

Others glycosides:

  • Antirrhinin (Cyanidin 3-O-rutinoside)
  • Ideain (Cyanidin 3-O-galactoside)
  • Delphinidin 3-O-rhamnoside
  • Petunidin 3-O-arabinoside
  • Petunidin 3-O-galactoside
  • Petunidin 3-O-rhamnoside
  • Petunidin 3-O-rutinoside
  • Primulin (Malvidin 3-O-galactoside)
  • Pulchellidin 3-rhamnoside
  • Tulipanin (Delphinidin 3-O-rutinoside)
Acylated anthocyanins
Acetylated anthocyanins
  • Cyanidin 3-O-(6-acetyl)glucoside
  • Delphinidin 3-O-(6-acetyl)glucoside
  • Malvidin 3-O-(6-acetyl)glucoside
  • Petunidin 3-O-(6-acetyl)galactoside
  • Petunidin 3-O-(6-acetyl)glucoside
  • Peonidin 3-O-(6-acetyl)glucoside
    • Coumaroylated anthocyanins
    (cis- and trans-)
    • Cyanidin 3-O-(6-p-coumaroyl)glucoside
    • Delphinidin 3-O-(6-p-coumaroyl)glucoside
    • Malvidin 3-O-(6-p-coumaroyl)glucoside
    • Petunidin 3-O-(6-p-coumaroyl)glucoside
    • Peonidin 3-O-(6-p-coumaroyl)glucoside
    Caffeoylated anthocyanins
    • Malvidin 3-O-(6-p-caffeoyl)glucoside
    • Peonidin 3-O-(6-p-caffeoyl)glucoside
    Malonylated anthocyanins
    • Malonylmalvin (malvidin 3-(6″-malonylglucoside)-5-glucoside)
    Acylated anthocyanin diglycosides
    • Cyanidin 3-O-(di-p-coumarylglucoside)-5-glucoside
    • Gentiodelphin (delphinidin 3-''O''-glucosyl-5-''O''-(6-''O''-caffeoyl-glucosyl)-3′-''O''-(6-''O''-caffeoyl-glucoside))
    • Nasunin (Delphinidin 3-(p-coumaroylrutinoside)-5-glucoside)
    • Petanin (petunidin 3-[6-O-(4-O-(E)-p-coumaroyl-O-α-l-rhamnopyranosyl)-β-D-glucopyranoside]-5-O-β-D-glucopyranoside)
    • Violdelphin (Delphinidin 3-rutinoside-7-O-(6-O-(4-(6-O-(4-hydroxybenzoyl)-β-D-glucosyl)oxybenzoyl)-β-D-glucoside)
    Flavanol-anthocyanin adducts
    • Malvidin glucoside-ethyl-catechin
    • Catechin(4α→8)pelargonidin 3-O-β-glucopyranoside
    • Epicatechin(4α→8)pelargonidin 3-O-β-glucopyranoside
    • Afzelechin(4α→8)pelargonidin 3-O-β-glucopyranoside
    • Epiafzelechin(4α→8)pelargonidin 3-O-β-glucopyranoside
    Miscellaneous


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