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Mass spectrometry of bis‐quinolizidine alkaloids: 13‐keto and hydroxy substituted derivatives of sparteine and lupanine
Author(s) -
Wyrzykiewicz E.,
Wysocka W.,
Wiewiórowski M.
Publication year - 1988
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210231005
Subject(s) - sparteine , quinolizidine , fragmentation (computing) , chemistry , mass spectrum , stereochemistry , mass spectrometry , high resolution , metastability , alkaloid , organic chemistry , chromatography , remote sensing , computer science , geology , operating system
The mass spectral fragmeutations of 13‐ketosparteine, 13‐hydroxysparteine, 13‐epihydroxysparteine, 13‐ketolupanine, 13‐keto‐α‐isolupanine, 13‐hydroxylupanine, 13‐hydroxy‐α‐isolupanine, 13‐epihydroxylupanine and 13‐epihydroxy‐α‐isolupanine are reinvestigated and discussed. Fragmentation pathways, elucidation of which was assisted by accurate mass measuiements and metastable transitions, are proposed. The fragmentation assignments are not consistent with those previously reported in the literature. Many fragment species of the same m / z (low‐resolution spectra) are composed of two fragment ions of different elemental compositions (high‐resolution spectra). The obtained data create a safe basis for distinguishing structural and stereoisomers.