期刊
PHYTOCHEMISTRY LETTERS
卷 5, 期 1, 页码 174-176出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.phytol.2011.12.004
关键词
Sorghum bicolor (L.) Moench; Var. bicolor; Structural characterization; NMR; MS; Flavonoids; Retrodihydrochalcone
资金
- Centre National de la Recherche Scientifique (CNRS)
- Universite de Strasbourg (UdS)
- Ministere de l'Enseignement Superieur et de la Recherche (France)
Two new open chain flavonoids were isolated from the butanediol/ethanol extract of Sorghum bicolor (L.) Moench leaf sheaths by fractionation and purification processes. This work led to the structural characterization of the 3-(2,4,6-trihydroxyphenyl)-1-(4-hydroxyphenyl)-propan-1-one (or 2,4,4 ',6-tetrahydroxydihydrochalcone) 1, and 3-(2,6-dihydrox-4-methoxyphenyl)-1-(4-hydroxyphenyl)-propan-1-one (or 2,4 ',6-trihydroxy-4-methoxydihydro-chalcone) 2. The structures of these flavonoids were determined by extensive spectroscopic analyses, including UV, ESIMS, HRESIMS, 1D and 2D NMR. The chemical properties of 1 were similar to those earlier described in literature for apiforol, never fully characterized. These results led us to re-question the real structure of this flavan-4-ol, which is often described to be present in Sorghum and has even been considered as a key intermediate in the formation of Sorghum 3-deoxyanthocyanidins. (C) 2011 Phytochemical Society of Europe. Published by Elsevier B.V. All rights reserved.
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