Nachbargruppenbeteiligung bei massenspektrometrischen Fragmentierungsreaktionen: Spermin‐Derivate. 18. Mitteilung über das massenspektrometrische Verhalten von Stickstoffverbindungen

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Abstract
The mass spectral behaviour of tetraacetyl spermine (2) has been investigated. The fragmentation reactions are characterized by the neighbouring group participation of the amide nitrogen atoms. Only a few reactions can be explained by usual pathways (α‐cleavage, onium reactions). Most of the fragment‐ions are formed by neighbouring group participation: [M‐COCH3]+‐Ion. Breakdown of one of the two 1,3‐diaminopropan moieties: m/e 242, 256, 268. This type of fragmentation is characteristic for all acetylated 1,3‐diaminopropan‐derivatives e.g. triacetylspermidine. Expulsion of a neutral amine: m/e 169. SNi‐type reactions, by which cyclic ions are formed: m/e 100.

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