NDLI: Oxidation of aromatic alcohols by laccase from Trametes versicolor mediated by the 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulphonic acid) cation radical and dication

Content Provider	Springer Nature Link
Author	Majcherczyk, A. Johannes, C. Hüttermann, A.
Copyright Year	1999
Abstract	Oxidation of aromatic alcohols, such as non-phenolic lignin model compounds, by oxidised species of 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) has been investigated. The cation radical and dication formed from ABTS were both capable of oxidising aromatic alcohols to aldehydes. The reactions terminated at the level of the aldehyde and no acids were formed. The cation radical and dication worked in a cycle as an electron-transfer compound between an oxidant and alcohol. In addition to the oxidation of the primary benzyl-hydroxyl group, an oxidation of the secondary α-hydroxyl group to the ketone by the dication was possible. All distinguishing features of these reactions corresponded to the results of the oxidation performed by the laccase of Trametes versicolor in the presence of ABTS. The decomposition products from the dication alone and ABTS with laccase confirmed the supposition that the dication was involved in the laccase mediator system. A reaction mechanism based on deprotonation of the alcohol cation radical was predicted to play a key role in the irreversible followup reaction and to be the driving force of the process.
Starting Page	267
Ending Page	276
Page Count	10
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	51
Issue Number	2
e-ISSN	14320614
Language	English
Publisher	Springer-Verlag
Publisher Date	1999-02-25
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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