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Electron‐impact mass spectrometry of Nuphar alkaloids
Author(s) -
LaLonde Robert T.,
Wong Chun F.,
Woolever John T.,
Auer Egmont,
Das Kala C.,
Tsai Amy IM.
Publication year - 1974
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.1210090714
Subject(s) - quinolizidine , mass spectrum , chemistry , mass spectrometry , piperidine , high resolution , analytical chemistry (journal) , alkaloid , stereochemistry , organic chemistry , chromatography , geology , remote sensing
Principal peaks in the mass spectra of deoxynupharidine are accounted for on the basis of high resolution mass spectrometry and peak shifts in the mass spectra of deoxynupharidine‐4‐ d 1 and deoxynupharidine‐6β, 7β‐ d 2 . Cleavage of the quinolizidine ring system of deoxynupharidine occurs predominantly in ring A, giving m / e 136, 107, 98, 94 and 81. The origins of the family of ions [M — alkyl] + and m / e 178 are considered. A comparative survey is made of the occurrence of these ions, and others, in the mass spectra of piperidine, quinolizidine and thiospirane types of Nuphar alkaloids. Attention is directed toions useful in distinguishing structural types.