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Four‐Electron Oxidative Formation of Aryl Diazenes Using a Tantalum Redox‐Active Ligand Complex

2008; Wiley; Volume: 47; Issue: 25 Linguagem: Inglês

10.1002/anie.200800812

1521-3773

Ryan A. Zarkesh, Joseph W. Ziller, Alan F. Heyduk,

Metal-Catalyzed Oxygenation Mechanisms

The active ingredient: The bis(μ-imido) tantalum dimer {[ONOred]Ta(μ-N-p-tolyl)(py)}2 releases the aryl diazene (p-tolyl)NN(p-tolyl) upon four-electron oxidation with PhICl2 (see scheme; py=pyridine). Studies suggest that the redox-active [ONOred]3− ligands act to collect single-electron oxidation equivalents for the multielectron reaction. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z800812_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.