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Mass spectrometry of bis-quinolizidine alkaloids: 13-keto and hydroxy substituted derivatives of sparteine and lupanine

✍ Scribed by E. Wyrzykiewicz; W. Wysocka; M. Wiewiórowski

Publisher
John Wiley and Sons
Year
1988
Tongue
English
Weight
404 KB
Volume
23
Category
Article
ISSN
1076-5174

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✦ Synopsis

The mass spectral fragmentations of Sketosparteine, 13-hydroxysparteine, 13-epihydroxysparteine, 13ketolupanine, 13-keto-a-isolupanine, lfhydroxylupanine, 13-hydroxy-a-isolupanine, 13-epihydroxylupanine and 13-epihydroxy-ar-isolupanine are reinvestigated and discussed. Fragmentation pathways, elucidation of which was assisted by accurate mass measurements 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 (lowresolution 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.

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