Possible mechanism for involvement of cysteine in aroma production in wine |
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Authors: | Marchand Stéphanie de Revel Gilles Vercauteren Joseph Bertrand Alain |
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Affiliation: | Faculté d'OEnologie, Unité Associée INRA/Université Victor Segalen Bordeaux 2, 351 Cours de la Libération, F-33405 Talence Cedex, France. |
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Abstract: | Under conditions close to those of wine, that is, low pH, aqueous medium, and low temperatures, this work describes N-(2-sulfanylethyl)-2-oxopropanamide (1), a new intermediate in the formation of 2-acetylthiazole from methylglyoxal and cysteine. 1 was characterized by MS, derivatization MS, and (1)H and (13)C NMR and was synthesized from 2-sulfanylethanamine and ethyl pyruvate. A formation pathway for 2-acetylthiazole from methylglyoxal and cysteine is proposed, in which 1 is a new intermediate in Maillard-type reactions in systems under mild conditions. |
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