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Electron impact mass spectrometry of hemiterpenoid tricyclic quinoline alkaloids
Author(s) -
Sturaro Alberto,
Traldi Pietro,
Bravo Pierfrancesco,
Viani Fiorenza,
Resnati Giuseppe
Publication year - 1987
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.1210220714
Subject(s) - quinoline , mass spectrometry , isomerization , chemistry , electron ionization , mass , mass spectrum , tricyclic , medicinal chemistry , computational chemistry , stereochemistry , organic chemistry , chromatography , ion , catalysis , ionization
Abstract The mass spectral behaviour of some quinoline‐type alkaloids, 3,4‐dihydro‐2 H ,5 H ‐pyrano[3,2‐ c ]quinolin‐5‐ones, isomeric 3,4‐dihydro‐2 H ,5 H ‐pyrano[2,3‐ b ]quinolin‐5‐ones and 2 H ,5 H ‐pyrano[3,2‐c]quinolin‐5‐ones, was studied in detail with the aid of linked scans, exact mass measurements and collisional spectrometry. The occurrence of a partial isomerization of the differently annulated isomers to a common, open‐chain structure is discussed.