A new vinylpyranoanthocyanin pigment occurring in aged red wine
2006
Mateus, N. | Oliveira, J. | Pissarra, J. | Gonzalez-Paramas, A.M. | Rivas-Gonzalo, J.C. | Santos-Buelga, C. | Silva, A.M.S. | Freitas, V de
A new pyranoanthocyanin-vinylphenol pigment was detected in an aged Port red wine. The UV-Vis spectrum of this pigment was found to have a lambda(max) of 538 nm that is bathochromically shifted from that of original anthocyanins, exhibiting a more purple hue in acidic solution. This newly formed pigment was synthesized in model solution through the reaction between malvidin 3-O-glucoside-pyruvic acid adduct and vinylphenol and its structure was assigned by NMR and mass spectrometry. This pigment is reported herein for the first time.
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