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首页> 外文期刊>Journal of Agricultural and Food Chemistry >NEW ETHER-LINKED FERULIC ACID-CONIFERYL ALCOHOL DIMERS IDENTIFIED IN GRASS STRAWS
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NEW ETHER-LINKED FERULIC ACID-CONIFERYL ALCOHOL DIMERS IDENTIFIED IN GRASS STRAWS

机译：在草秆中鉴定了新的醚键连接的果酸-CONCONERYL醇丁酯

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摘要

Grass cell walls are typified by ferulic esters linked to polysaccharides. In past research, these feruloylated esters have been repeatedly speculated to be cross-linking agents with lignins, via ether bonds. Whereas this hypothesis is strongly supported by degradative studies, model experiments, and NMR data, diagnostic fragments associating ferulic acid and lignin precursors, through an ether bond, have never been isolated from grass walls. This paper reports the isolation of such products by saponification of wheat and oat straws. New dimers associating ferulic acid to the beta position of coniferyl alcohol are characterized by gas chromatography/mass spectrometry and authenticated by independently synthesized compounds. The biochemical implication is that ferulate esters are copolymerized with lignin precursors through oxidative coupling. These ferulate esters thereby provide points of growth for the polymer Lignin, via ether bonds that anchor Lignins to wall polysaccharides.
机译：草细胞壁的典型特征是与多糖连接的阿魏酸酯。在过去的研究中，已经反复推测这些阿魏酸酯化的酯是通过醚键与木质素的交联剂。尽管该假设得到降解研究，模型实验和NMR数据的有力支持，但从未从草墙中分离出通过醚键将阿魏酸和木质素前体相关联的诊断片段。本文报道了通过对小麦和燕麦秸秆进行皂化来分离此类产品的方法。将阿魏酸与松柏醇的β位置相关联的新二聚体通过气相色谱/质谱法进行表征，并通过独立合成的化合物进行鉴定。生化含义是阿魏酸酯通过氧化偶联与木质素前体共聚。这些阿魏酸酯因此通过将木质素锚定在壁多糖上的醚键为聚合物木质素提供了生长点。

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