Journal
TETRAHEDRON LETTERS
Volume 43, Issue 35, Pages 6151-6153Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(02)01294-7
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A new pigment was detected in wine-like model solution containing malvidin 3-O-glucoside and acetaldehyde. This compound was isolated, and its structure was investigated by UV, MS and NMR spectroscopies. The analytical data allowed identification of it to 8,8 methyl methine-linked malvidin 3-O-glucoside dirtier. The occurrence of this pigment was demonstrated in red wine. A polymeric fraction was also isolated from the model solution and analysed by LC/MS. Detection of methyl methine-linked malvidin 3-O-glucoside oligomers proved that acetaldehyde mediated self-condensation of anthocyanins is possible, and that the C6 position of anthocyanins seems reactive as the C8 although to a lesser extent. (C) 2002 Elsevier Science Ltd. All rights reserved.
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