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Electron-impact Induced Fragmentation of the Isomeric 2- and 4-Oxo-6,7,8,9-tetrahydro-pyrido[1,2-a]pyrimidines

✍ Scribed by Tünde E. Takácsy; József Tamás (deceased); István Hermecz; Katalin Kovács

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 144 KB
Volume: 11
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(199704)11:6<664::aid-rcm837>3.0.co;2-v

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✦ Synopsis

The mass spectrometric behaviour of the isomeric 2-and 4-oxo-6,7,8,9-tetrahydro-pyrido[1,2-a]pyrimidines have been studied in detail under electron-impact induced ionization. Differences in the main fragmentation routes of the two isomeric compounds have been established by high resolution mass measurements and linked scan spectra (constant B/E) of the deuterium-labelled analogue. Correlation between the different dominating tautomeric forms and the characteristic fragmentation pattern of the isomers is discussed.

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