Oxidation of some trinuclear aromatic compounds with cerium(IV) ammonium nitrate

Abstract
Anthrone, xanthen, and thioxanthen were oxidised with cerium(IV) ammonium nitrate (CAN) in methanol to yield anthraquinone, xanthone, and thioxanthone. In methanol, acridine gave acridine and small amounts of 3-nitro-and 3,7-dinitro-acridone; phenazine gave the mono-N-oxide. Oxidation of acridine or acridone in acetic acid at reflux temperature gave 1,3,7-trinitro- and 1,3,7,9-tetranitro-acridone.

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