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Electron impact ionization mass spectra of 6‐carbamoyloxy‐3‐oxo‐3,6‐dihydro‐2 H ‐pyran and 5 H ‐pyrano[3,2‐ d ]‐oxazole‐2,6‐dione derivatives
Author(s) -
Couladouros Elias A.,
Haroutounian Serkos A.
Publication year - 1995
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570320235
Subject(s) - chemistry , fragmentation (computing) , oxazole , electron ionization , ionization , mass spectrum , pyran , bicyclic molecule , spectral line , ion , stereochemistry , analytical chemistry (journal) , organic chemistry , physics , astronomy , computer science , operating system
The electron impact ionization mass spectra of 6‐carbamoyloxy‐3‐oxo‐3,6‐dihydro‐2 H ‐pyrans show a weak molecular ion peak and a base peak of m/z 84 resulting from a retro Diels‐Alder fragmentation. The bicyclic system 5 H ‐pyrano[3,2‐ d ]oxazole‐2,6‐dione gives a characteristic fragmentation pattern with a very stable fragment of oxazolenone.