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Abstract
Synthesis of a series of 4-(O-arylsulfonyl)quinoline-5,8-quinones 9 is described. This was accomplished by the direct sulfonylation of the readily available quinolinone 7 by a variety of arylsulfonyl chlorides followed by oxidation of the resulting 5,8-dimethoxyquinolines 8 with ceric ammonium nitrate.