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Characterization of 3-methoxyflavones using fast-atom bombardment and collision-induced dissociation tandem mass spectrometry

✍ Scribed by Y. L. Ma; H. Van den Heuvel; M. Claeys

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 167 KB
Volume: 13
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(19991015)13:19<1932::aid-rcm735>3.0.co;2-w

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✦ Synopsis

A mass spectrometric method based on the combined use of fast-atom bombardment (FAB), collisioninduced dissociation (CID) and linked scanning at constant B/E has been used for the analysis of the fragmentation behavior of protonated 3-methoxyflavones (3-MFs). It is shown that several diagnostic ions such as 1,3 A and 0,2 B ions allow for an unambiguous localization of functions in the A-and B-rings and that the position of an additional methoxy group in the B-ring could be determined by a detailed analysis of the spectral patterns. Isomeric 3-MFs can be differentiated using this methodology. General fragmentation patterns of 3-MFs are discussed and plausible formation mechanisms of relatively abundant fragment ions are proposed.

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