Synthesis of new trimeric lignin model compounds containing 5-5' and beta-O-4' substructures, and their characterization by 1D and 2D NMR Techniques

Synthesis of new trimeric lignin model compounds containing 5-5' and beta-O-4' substructures, and their characterization by 1D and 2D NMR Techniques

Trimeric lignin model compounds containing biphenyl (5-5') and beta-aryl ether (beta-O-4') were synthesized from dehydrodivanillin derivatives and alpha-bromo acetovanillone derivatives via Williamson's reaction. The ¹H and 13C NMR characteristics of the resulting trimers were studied using corresponding ¹H and 13C NMR spectra as well as homo- and heteronuclear 2D NMR techniques. The results are discussed in terms of signal assignment and conformation of the molecules.

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Bibliographic Details
Main Authors: Alves,Vera L., Drumond,Mariza G., Stefani,Guglielmo M., Chen,Chen-Loung, Piló-Veloso,Dorila
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Química 2000
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000500006
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