The base peak in the spectrum of lysine methyl ester is due to the fragment ion C ~H ~O N (m/e 84), for which the cyclic structure g (Scheme I ) is deduced. During its formation from the [M-COOCHsI-ion an equilibration of both nitrogen atoms takes place (ion c, Scheme I). The cyclic nature of ion m/
Massenspektrometrische Identifizierung und Synthese isomerer und homologer Spermidin- und Spermin-Derivate. 25. Mitteilung über das massenspektrometrische Verhalten von Stickstoffverbindungen. 161. Mitteilung über Alkaloide
✍ Scribed by Armin Guggisberg; Robert W. Gray; Manfred Hesse
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- German
- Weight
- 589 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Synthesis of isomeric and homologous spermidine and spermine derivatives and their identification by mass spectrometry.
The structure of homologous and isomeric spermidines and spermines follows from mass‐spectroscopical analysis of their peracetyl (see text, footnote 3) (Table 1) or tosyl‐acetyl (Table 2) derivatives. In the case of the peracetyl compounds, triads of peaks are recorded which, according to the number of methylene groups between the nitrogen atoms, show mass numbers characteristic for each of the substances (Scheme 1, ions b, d, e and c).
On the basis of cyclic ions of type f (Scheme 2), occurring in the mass spectra of N‐acetyl derivatives, tosylated on a secondary amino nitrogen atom, deductions can be drawn as to the number of methylene groups between neighbouring tosylated and acetylated nitrogen atoms in these compounds.
📜 SIMILAR VOLUMES
**Formation of cyclic ions and bicyclic transition states in the mass spectral decomposition of substituted α,ω‐alkanediamines.** N‐Phenethyl‐N(4‐acetamidobutyl)‐__p__‐toluene‐sulfonamide (**4**) and its homologues were synthesized and the mass spectral behaviour investigated. After loss of a benzy