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Electron impact mass spectrometric differentiation of 5,6-dihydroxy-7,8-dimethoxy- and 5,8-dihydroxy-6,7-dimethoxyflavones

✍ Scribed by F.A.T. Barberan; F. Ferreres; F. Tomas; A. Guirado


Book ID
107842621
Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
148 KB
Volume
25
Category
Article
ISSN
0031-9422

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## Abstract ( Β± )‐5,5″‐Dihydroxy‐7,7″‐dimethoxy‐8,8″‐biflavone (( Β± )‐l) was resolved into its optically pare forms __via__ the formation and recrystallization of its (2__R__)‐ and (2__S__)‐1‐(4‐toluenesulfonyl)prolylate, and the methylated derivatives of (+)‐ and (‐)‐1 were also prepared. The abso