Linear aliphatic dimeric esters from cork suberin

被引：36

作者：

Graca, Jose ^{[1
]}

Santos, Sara ^{[1
]}

机构：

[1] Univ Tecn Lisboa, Dept Engn Florestal, Inst Super Agron, P-1349017 Lisbon, Portugal

来源：

BIOMACROMOLECULES | 2006年 / 7卷 / 06期

关键词：

D O I：

10.1021/bm060174u

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Cork suberin was partially depolymerized by methanolysis catalyzed by calcium hydroxide. Analysis by GC-MS of the methanolysate showed suberin monomers, including glycerol and long-chain alpha, omega-diacids and omega-hydroxyacids. ESI-MS analysis of the methanolysate showed, besides the aliphatic monomers, suberin oligomers, including linear dimeric esters of R, omega-diacids and omega-hydroxyacids. Two types of dimeric esters were identified: a alpha,omega-diacid linked to a omega-hydroxyacid and two inter-linked omega-hydroxyacids. The R, omega-diacids and omega-hydroxyacids found as monomer residues in the dimeric esters were mainly the C18 monomers with midchain substituents. The identification of these dimeric esters was based in their CID-MS/MS spectra and confirmed after synthesis of model compounds. The occurrence of inter-esterified long-chain monomers in suberin brings a new insight in the understanding of the polyester structure of this biopolymer.

引用

页码：2003 / 2010

页数：8

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