252340-31-1Relevant articles and documents
Formation of tetrahydro-β-carbolines and β-carbolines during the reaction of L-tryptophan with D-glucose
Roenner, Birgit,Lerche, Holger,Bergmueller, Wolfgang,Freilinger, Christine,Severin, Theodor,Pischetsrieder, Monika
, p. 2111 - 2116 (2000)
The reaction of L-tryptophan (Trp) with D-glucose under conditions that can occur during food processing and preparation was studied by high- performance liquid chromatography with diode array detection (HPLC/DAD). Besides the well-established glucose-tryptophan Amadori product (AP), (1R,3S)-1-(D-gluco-1,2,3,4,5-pentahydroxypentyl)-1,2,3,4-tetrahydro-β- carboline-3-carboxylic acid (PHP-THβC) was identified as an important product of this reaction. For preparation, PHPTHβC was obtained in high yields when Trp and D-glucose were reacted under strongly acidic conditions after heating in methanol. At elevated reaction temperatures (150 °C) 1- acetyl-β-carboline (acetyl-βC), was detected in significant concentrations. The mixtures were heated under variations of reaction time and temperature, and AP, PHP-THβC, and acetyl-βC were quantified. In the presence of air oxygen or mild, food relevant oxidants, such as L-dehydroascorbic acid, PHP- THβC was readily oxidized to a product that was identified as the previously unknown 1-(D-gluco-1,2,3,4,5-pentahydroxypentyl)-β-carboline (PHP-βC). Formation of PHP-THβC and PHP-βC in foodstuffs would deserve particular interest because multiple physiological activity of THβC and βC derivatives has been shown previously.