An oxidized tartaric acid residue as a new bridge potentially competing with acetaldehyde in flavan-3-OL condensation

@inproceedings{Fulcrand1997AnOT,
  title={An oxidized tartaric acid residue as a new bridge potentially competing with acetaldehyde in flavan-3-OL condensation},
  author={H{\'e}l{\`e}ne Fulcrand and V{\'e}ronique Cheynier and Jan Oszmiański and Michel Moutounet},
  year={1997}
}
Abstract Iron-induced oxidation of (+)-catechin in a wine-like solution yielded typical products, including colourless and yellow compounds. Structural characterization of the major colourless one indicated that it is a dimer, in which flavanol units are linked through a carboxy-methine bridge. Unlike what might be expected, the structure showed that oxidation does not affect catechin directly, but tartaric acid, to give glyoxylic acid, which then reacts with two flavanol units. From a… CONTINUE READING

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