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Thermal Degradation of Glycosides, IV. Degradation of flavonoid glycosides

✍ Scribed by Kim, Youn Chul ;Higuchi, Ryuichi ;Kitamura, Yoichi ;Komori, Tetsuya

Publisher: John Wiley and Sons
Year: 1991
Tongue: English
Weight: 487 KB
Volume: 1991
Category: Article
ISSN: 0947-3440
DOI: 10.1002/jlac.1991199101221

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✦ Synopsis

Abstract

By mere heating, the flavone (1, 7), flavanone (4, 10), and flavonol glycosides (13, 14) are converted into their aglycones and monoglycosides. The products of pyrolysis have been isolated by chromatography and their structures elucidated by chemical and spectroscopic methods. The compound derived from the sugar moiety in the pyrolysis of glucosides has been identified as levoglucosan (17). From the structures of some minor products (16, 18, 19), generated by the thermal degradation, a mechanism of their generation and the elucidation of the structures of rearranged ions (for example [M + 146 + H]^+^), often generated in the FD‐mass spectra of glycosides, are presented.

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