Product identification of guaiacol oxidation catalyzed by manganese peroxidase

Sangpill Hwang, Chang Ha Lee, Ik Sung Ahn

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39 Citations (Scopus)


The mechanism underlying the oxidation of guaiacol (2-methoxyphenol) by manganese peroxidase (MnP) was studied by structural identification of the products. After separation by TLC, the products were characterized by NMR, GC-MS, and LC-MS. They were determined to be 3,3′-dimethoxy-4,4′-biphenol, a mixture of 3,3′-dimethoxy-4,4′-biphenoquinone and 3,5′-dimethoxy-4,4′-biphenoquinone, 6-methoxy-4-(4-hydroxy-3-methoxyphenyl)-1,2-benzoquinone, 3-(4-hydroxy-3-methoxy-phenyl)-5,3′-dimethoxy-4,4′-biphenol, and a mixture of 5-(4-hydroxy-3-methoxyphenyl)-3,3′-dimethoxy-4,4′-biphenoquinone and 3-(4-hydroxy-3-methoxyphenyl)-5,3′-dimethoxy-4,4′-biphenoquinone. From the direct GC-MS analysis, two other products were identified as 3-methoxy-catechol and 2-methoxy-1,4-benzoquinone. The reaction mechanism of MnP-catalyzed guaiacol oxidation is suggested on the basis of the structural information obtained for these products.

Original languageEnglish
Pages (from-to)487-492
Number of pages6
JournalJournal of Industrial and Engineering Chemistry
Issue number4
Publication statusPublished - 2008 Jul

Bibliographical note

Funding Information:
The work was financially supported by the ERC program of MOST/KOSEF (R11-2003-006-01001-1) through the Advanced Environmental Biotechnology Research Center at POSTECH.

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)


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