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The preferred mode of cycloreversion of some 1,3,4‐substituted azetidin‐2‐ones upon electron impact
Author(s) -
Auriel Michel,
De Hoffmann Edmond,
Scheers Philippe,
Deffense Etienne
Publication year - 1989
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.1210240102
Subject(s) - fragmentation (computing) , ion , mass spectrum , kinetic energy , chemistry , electron ionization , electron , computational chemistry , physics , organic chemistry , computer science , nuclear physics , quantum mechanics , ionization , operating system
The mass spectra of some 1,3,4‐substituted azetidin‐2‐ones are measured. Fragmentation pathways are confirmed by use of both high‐resolution and mass‐analysed ion kinetic energy. They are consistent with the possible [2 + 2]‐ cycloadditions through which the azetidin‐2‐ones may be synthesized. More attention has to be paid to further fragmentations of the main fragments in assessing the preferred fragmentation mode. Influence of side‐chain substituents is discussed.