Author/Authors :
Mateus، نويسنده , , Nuno M.C. Oliveira، نويسنده , , Joana and Pissarra، نويسنده , , Joمo and Gonzلlez-Paramلs، نويسنده , , Ana M. and Rivas-Gonzalo، نويسنده , , Julian C. and Santos-Buelga، نويسنده , , Celestino and Silva، نويسنده , , Artur M.S. and de Freitas، نويسنده , , Victor، نويسنده ,
Abstract :
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 λmax 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.
Keywords :
Pyranoanthocyanin , pyruvic acid , Red wine , Pigment , aging , Colour , Vinylphenol
