Naslov
Hydrogen Migration in the Electron Impact Induced Retro Diels-Alder Fragmentation of N-Aryl 4-H-5, 7a-epoxyisoindolines
(Induced Retro Diels-Alder Fragmentation of N-Aryl 4-H-5, 7a-epoxyisoindolines)

Autori
Mintas, Mladen ; Klepo, Živko ; Jakopčić, Krešimir ; Klasinc, Leo

Izvornik
Organic mass spectrometry (0030-493X) 14 (1979); 254-256

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
N-aryl-4-H-5; 7a-epoxyisoindolines; the retro Diels-Alder fragmentation

Sažetak
The electron impact induced fragmentations of the C-5 unsubstituted and 5-methyl N-aryl-4-H-5, 7a-epoxyisoindolines (where aryl is phenyl, p-tolyl, p-methoxyphenyl, o-methoxyphenyl and p-chlorphenyl) were investigated. The fragmentations patterns deduced were supported by exact mass measurements of prominent ions and by deuterium labelling. The retro Diels-Alder fragmentation turned out to be a predominant process in all the compounds investigated. In the mass spectra of the 5-methyl N-aryl-4-H-5, 7a-epoxyisoindolines hydrogen migration preceding fragmentation occured. From the mass spectrum of the specifically deuturated compound it was concluded that the transferred hydrogen originates exclusively from the 5-methyl group.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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