A Multi-Step Chromatographic Approach to Purify Radically Generated Ferulate Oligomers Reveals Naturally Occurring 5-5/8-8(Cyclic)-, 8-8(Noncyclic)/8-O-4-, and 5-5/8-8(Noncyclic)-Coupled Dehydrotriferulic Acids
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چکیده
منابع مشابه
Isolation and structural characterisation of 8-O-4/8-O-4- and 8-8/8-O-4-coupled dehydrotriferulic acids from maize bran.
Two new dehydrotriferulic acids were isolated from saponified maize bran insoluble fiber using Sephadex LH-20 chromatography followed by semi-preparative RP-HPLC. Based on UV-spectroscopy, mass spectroscopy and one- and two-dimensional NMR experiments, the structures were identified as 8-O-4,8-O-4-dehydrotriferulic acid and 8-8(cyclic),8-O-4-dehydrotriferulic acid. Which of the possible phenols...
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Ferulates and dehydrodiferulates have a significant role in cross-linking polysaccharides to lignin in grass cell walls. Among the various ferulate dehydrodimers, the 5]5-coupled dehydrodimer (E,E)-4,49dihydroxy-3,39-dimethoxy-5,59-bicinnamate is capable of the most extensive cross-linking into lignin, forming major branch-points. However, current literature fails to recognise the role of radic...
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ژورنال
عنوان ژورنال: Frontiers in Chemistry
سال: 2018
ISSN: 2296-2646
DOI: 10.3389/fchem.2018.00190