Negative ion electrospray mass spectrometry of neoflavonoids

Negative ion electrospray ionisation (ESI) mass spectra of the neoflavonoids brazilin and hematoxylin under collision induced decomposition (CID) conditions show fragments characteristic of rings A and C. In their oxidised forms, the fragments are characteristic of rings B and D. The electrospray io...

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Bibliographic Details
Published in:Phytochemistry (Oxford) 2005-12, Vol.66 (23), p.2766-2770
Main Authors: Hulme, Alison N., McNab, Hamish, Peggie, David A., Quye, Anita
Format: Article
Language:English
Subjects:
Benzopyrans - chemistry
Biological and medical sciences
brazilin
Caesalpinia sappan
Chemical constitution
chemical structure
flavonoids
Flavonoids - chemistry
Fundamental and applied biological sciences. Psychology
Haematoxylum
hematoxylin
Hematoxylin - analogs & derivatives
Hematoxylin - chemistry
Indenes - chemistry
ion electrospray mass spectrometry
Mass spectrometry
Molecular Structure
Neoflavonoids
oxidation
Oxidation-Reduction
plant biochemistry
plant extracts
Plant physiology and development
reduction
Senescence and abscission
spectral analysis
Spectrometry, Mass, Electrospray Ionization - methods
Vegetative apparatus, growth and morphogenesis. Senescence
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Summary:Negative ion electrospray ionisation (ESI) mass spectra of the neoflavonoids brazilin and hematoxylin under collision induced decomposition (CID) conditions show fragments characteristic of rings A and C. In their oxidised forms, the fragments are characteristic of rings B and D. The electrospray ionisation mass spectra of the neoflavanoids brazilin and hematoxylin are reported in both their reduced ( 1 and 2, respectively) and their oxidised forms ( 3 and 4, respectively). In the reduced forms, breakdown pathways under collision induced decomposition (CID) conditions produce fragments characteristic of rings A and C; in their oxidised forms, the fragments are characteristic of rings B and D. The structural assignments of the fragments are substantiated by recording the spectra after deuterium exchange at the hydroxyl groups.
ISSN:0031-9422
1873-3700
DOI:10.1016/j.phytochem.2005.09.001