Synthesis 2008(12): 1889-1894  
DOI: 10.1055/s-2008-1067088
PAPER
© Georg Thieme Verlag Stuttgart · New York

Oxidation of Anilines with Hydrogen Peroxide and Selenium Dioxide as ­Catalyst

Christin Gebhardt, Beate Priewisch, Elisabeth Irran, Karola Rück-Braun*
Technische Universität Berlin, Institut für Chemie, Straße des 17. Juni 135, 10623 Berlin, Germany
Fax: +49(30)31479651; e-Mail: krueck@chem.tu-berlin.de;
Further Information

Publication History

Received 25 February 2008
Publication Date:
16 May 2008 (online)

Abstract

A variety of substituted anilines are selectively oxidized to afford high yields of azoxyarenes by using 30% hydrogen peroxide and selenium dioxide as catalyst in methanol at room temperature. The oxidation of 4-alkoxyanilines under the same reaction conditions furnishes the corresponding 4-alkoxy-N-(4-nitrophenyl)anilines in reasonable yields, alongside other oxidation by-products. The structure of 4-methoxy-N-(4-nitrophenyl)aniline is elucidated by X-ray crystal structure analysis. From these results, some general aspects of the reaction pathways of aniline oxidation are discussed.

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