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A study of some imidazo[l,5-a]benzodiazepin-6-ones by electron impact mass spectrometry. characterization by tandem mass spectrometry of a distonic fragment ion

✍ Scribed by Federico Maria Rubino; Luigi Zecca; Paolo Mascaro; Walter Hunkeler

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
546 KB
Volume
26
Category
Article
ISSN
1076-5174

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✦ Synopsis

Abstract

The mass spectra of several imidazo[l,5‐a]benzodiazepin‐6‐one derivatives of neuropharmacological significance were determined in order to establish their decomposition paths under electron impact. A novel distonic fragment ion was observed and it was possible to demonstrate by consideration of metastable ions and by tandem mass spectrometry that it undergoes isomerization to the corresponding classical structure.

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