Oligolignans in Norway spruce and Scots pine knots and Norway spruce stemwood

Stefan Willför, Markku Reunanen, Patrik Christoffer Eklund, Rainer Sjöholm, Leif Kronberg, Pedro Fardim, Suvi Pietarinen, Bjarne Holmbom

    Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

    41 Citeringar (Scopus)

    Sammanfattning

    Oligolignans present in substantial amounts in Norway spruce and Scots pine knots were characterised. The hydrophilic knotwood substances were extracted and different chromatographic methods were applied to obtain fractions for analysis by GC, GC-MS, HR-EI-MS, LC-ESI-MS, NMR, and FTIR. beta-O-4-Linked guaiacylglyceryl ethers of hydroxymatairesinol (la, lb, Ic), secoisolariciresinol (II), lariciresinol (III), isolariciresinol (IV), lignan A (V), liovil (VI), conidendrin (VII), and pinoresinol (VIII) were identified in the spruce knotwood extract and beta-O-4-linked guaiacylglyceryl ethers of nortrachelogenin (IX) and secoisolariciresinol (II) in the pine knotwood extract. The structures of allo-hydroxymatairesinol-4'-guaiacylglyceryl ether (Ia), hydroxymatairesinol-4-guaiacylglyceryl ether (lb), hydroxymatairesinol-4'-guaiacylglyceryl ether (Ic), secoisolariciresisinol-4-guaiacylglyceryl ether (II), and lariciresinol-4'-guaiacylglyceryl ether (III) were determined via GC-MS, HR-MS, and H-1 and C-13 NMR analyses. The structures of (Ia), (Ic), (IV), (V), (VI), (VII), and (IX) have not been reported earlier. Spruce stemwood, both heartwood and sapwood, also contained oligolignans in small amounts. In addition, some dilignans with four phenylpropanoid units were tentatively identified in the hydrophilic knotwood substances.
    OriginalspråkOdefinierat/okänt
    Sidor (från-till)345–354
    Antal sidor10
    TidskriftHolzforschung
    Volym58
    Utgåva4
    StatusPublicerad - 2004
    MoE-publikationstypA1 Tidskriftsartikel-refererad

    Nyckelord

    • ASE
    • C-13 NMR
    • dilignans
    • FTIR
    • guaiacylglycerol
    • guaiacylglyceryl ether
    • H-1 NMR
    • heartwood
    • knots
    • oligolignans
    • Picea abies
    • Pinus sylvestris
    • sesquilignans

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