Ninhydrin 反応の研究 (第7報)

Diamine類のNinhydrin反応

抄録

1) In the nihydrin reaction, ornithine, lysine, cadaverine, and hexamethylenediamine form Ruhemann purple corresponding to one amino radical and this is assumed to be due to the ring formation of the amine aldehyde expected to be formed during the course of this reaction.
2) In spite of the fact that γ-aminobutyladehyde diethylacetal gives positive ninhydrin reaction, it shows a negative reaction after treatment with N hydrochloric acid. This is thought to endorse the foregoing assumption.
3) Octa- and decamethylenediamines form Ruhemann purple corresponding to two amino radicals.
4) The rate of Ruhemann purple formation in ethylenediamine is very low and this is assumed to be due to the formation of an entirely different condensate by the reaction of ethylenediamine and ninhydrin.