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Mass Spectrometric Fragmentation of Saturated Isoindolobenzoxazepinones and -benzoxazinones Under Electron Ionization

✍ Scribed by Tuula Partanen; Pirjo Vainiotalo; Géza Stájer; Gábor Bernáth

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
423 KB
Volume
10
Category
Article
ISSN
0951-4198

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✦ Synopsis

The mass spectral fragmentation of three isoindolo[2,4]benzoxazepinones, five isoindolo[3,11-and two isoindolo[l,3]benzoxazinones was studied under electron ionization by means of low-resolution, high resolution and metastable-ion analysis techniques. The major fragmentation pathways began as radical-site-initiated cleavage, and ionization of the nitrogen atom seemed to prevail. Ionization of the carbonyl and heterocyclic oxygen atoms was also observed. For the trinorbornene compound, a retro-Diels-Alder reaction was favoured.

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