Degradation of a non-phenolic β-O-4 substructure and of polymeric lignin model compounds by laccase ofCoriolus versicolorin the presence of 1-hydroxybenzotriazole
作者： Shingo Kawai , Masanori Asukai , Noriko Ohya , Kyoko Okita , Takashi Ito
DOI: 10.1111/J.1574-6968.1999.TB13354.X
关键词:
摘要: A β-O-4 lignin substructure model compound, 2-(2,6-dimethoxy-4-formylphenoxy)-1,3-dihydroxy-1-(4-ethoxy-3-methoxyphenyl)propane, was oxidized by Coriolus versicolor laccase in the presence of 1-hydroxybenzotriazole to form four products: 2,3-dihydroxy-1-(4-ethoxy-3-methoxyphenyl)propanone, 1-(4-ethoxy-3-methoxyphenyl)-3-hydroxypropanone, 4-ethoxy-3-methoxybenzoic acid, and 2,6-dimethoxy-p-benzoquinone. The results show that three types reactions, β-ether cleavage, Cα-Cβ Cα-oxidation are catalyzed laccase–1-hydroxybenzotriazole couple. Furthermore, depolymerization a polymeric guaiacyl compound prepared from [β-14C]coniferyl alcohol also caused this system.
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