Studies on the Reaction of Dipeptides with Glyoxal

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• The reaction of various dipeptides with glyoxal at 100°C, pH 5.0 was studied. Carbon dioxide, ammonia, amino acids and aldehydes were detected from the reaction solutions. Besides, a series of new pyrazinones-2-(3'-alkyl-2'-oxo-pyrazin-1'-yl)alkyl acid-were isolated, and their chemical structures were confirmed by UV, IR, MS and NMR spectra. These pyrazinones seem to play a role in the browning of the reaction. In the reaction with glyoxal, acetaldehyde and glucose, reactivity of peptides was proved to be much higher than that of amino acids. The reaction mechanism of dipeptides with glyoxal was also proposed.

• 公益社団法人 日本農芸化学会の論文

公益社団法人 日本農芸化学会 | 論文

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