炭水化物系化合物の自動酸化分解(第14報) : アスコルビン酸の褐変分解その3

概要

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The four pigments of isatin derivatives were separated from the browinng reaction of L-ascorbic acid (AAH_2) with p-toluidine. These colors were identified as 2,3-di-(p-tolylimino)-5-methylindoline (I) (reddish brown), 2-deoxy-2-(p-tolylimino)-5,5'-dimethyl-isoindigo (II) (reddish orange), 5,5'-dimethylindirubin (III) (violet), and 3-deoxy-3-(p-tolylimino)-5,5'-dimethylindirubin (IV) (violet), which were found to be formed by the reaction of glucose and p-toluidine. The formation pathway of these pigments is different from those produced by the glucose-p-toluidine reaction, that is, the reaction of ^<14>C_1-AAH_2,5,6-isopropylidene-AAH_2,5-phenyl-2,3,4 (5) furantrione, glycolaldehyde, and triose reductone with p-toluidine suggested that they are not formed from C_1-C_2 fragment of AAH_2,but formed from its C_5-C_6 fragment.
公益社団法人日本薬学会の論文
1976-07-25