Bei der Farbreaktion von Tryptophan bzw. dessen Methylester mit 4-Dimethyl-aminobenzaldehyd und auch mit einigen anderen Aldehyden konnten 2,2'-Diindolylmethane 3 sowie 1,2,3,4-Tetrahydro-0-carboline 4 isoliert werden.Reaction of Tryptophan with Aldehydes: 2,2'-Diindolylmethanes.The color reaction of tryptophan or its methyl ester with 4-(dimethylamino)benzaldehyde and other aldehydes yields 2,2'-diindolylmethanes 3 and 1,2,3,4-tetrahydro-0-carbolines 4 which were isolated.
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