A Direct Method for Oxidizing
Quinoxaline, Tetraazaphenanthrene,
and Hexaazatriphenylene Moieties Using Hypervalent λ<sup>3</sup>‑Iodinane Compounds
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Abstract
An
efficient oxidation reaction of various electron-poor quinoxaline-core-containing
compounds, such as quinoxalines, 1,4,5,8-tetraazaphenanthrenes, and
1,4,5,8,9,12-hexaazatriphenylene, using [bis(trifluoroacetoxy)iodo]benzene
is reported. These compounds are converted into the corresponding
quinoxalinediones in good to high yields at room temperature using
an acetonitrile/water solvent mixture. This unprecedented reaction
should enable the synthesis of a wide variety of compounds useful
in several fields of chemistry