Synthesis of 5, 8-and 5, 6-Quinolinediones Using Oxidative Demethylation with Cerium (IV) Ammonium Nitrate.

Y Kitahara, M Nagatsu, Y Shibano…

Index: Kitahara, Yoshiyasu; Nagatsu, Masanori; Shibano, Yoshikazu; Kubo, Akinori Chemical and Pharmaceutical Bulletin, 1997 , vol. 45, # 10 p. 1697 - 1701

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Citation Number: 5

Abstract

4-Phenyl-5, 8-quinolinediones (7, 8, 12, 13), 4-phenyl-5, 6-quinolinediones (9, 14), and 2- dialkylamino-4-phenyl-5, 8-quinolinediones (17, 18), were synthesized by oxidative demethylation of the corresponding 5, 8-dimethoxy-or 5, 6, 8-trimethoxy-4-phenylquinolines with cerium (IV) ammonium nitrate. Sulfur-containing quinolinequinones (21, 24) were prepared by oxidation of the corresponding 5, 8-dimethoxy-or 5, 6, 8-trimethoxy-2 (1H)- ...