ELECTRON-IMPACT IONIZATION MASS-SPECTRA OF 6-CARBAMOYLOXY-3-OXO-3,6-DIHYDRO-2H-PYRAN AND 5H-PYRANO[3,2-D]-OXAZOLE-2,6-DIONE DERIVATIVES

Authors
COULADOUROS EA HAROUTOUNIAN SA
Citation
Ea. Couladouros et Sa. Haroutounian, ELECTRON-IMPACT IONIZATION MASS-SPECTRA OF 6-CARBAMOYLOXY-3-OXO-3,6-DIHYDRO-2H-PYRAN AND 5H-PYRANO[3,2-D]-OXAZOLE-2,6-DIONE DERIVATIVES, Journal of heterocyclic chemistry, 32(2), 1995, pp. 579-584
Citations number
9
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Journal of heterocyclic chemistry → ACNP
ISSN journal
0022152X
Volume
32
Issue
2
Year of publication
1995
Pages
579 - 584
Database
ISI
SICI code
0022-152X(1995)32:2<579:EIMO6>2.0.ZU;2-U
Abstract
The electron impact ionization mass spectra of 6-carbamoyloxy-3-oxo-3, 6-dihydro-2H-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 5H-pyrano[3,2-d]oxazole-2,6-dione gives a characteristic fragme ntation pattern with a very stable fragment of oxazolenone.