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Induced Retro Diels-Alder Fragmentation of N-Aryl 4-H-5, 7a-epoxyisoindolines (CROSBI ID 116498)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Mintas, Mladen ; Klepo, Živko ; Jakopčić, Krešimir ; Klasinc, Leo Induced Retro Diels-Alder Fragmentation of N-Aryl 4-H-5, 7a-epoxyisoindolines // Organic mass spectrometry, 14 (1979), 254-256-x

Podaci o odgovornosti

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

engleski

Induced Retro Diels-Alder Fragmentation of N-Aryl 4-H-5, 7a-epoxyisoindolines

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.

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

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Podaci o izdanju

14

1979.

254-256-x

objavljeno

0030-493X

Povezanost rada

Kemija