Samuel Attah Egu 1 , Uchechukwu Chris Okoro 1 , Thomas Wirth 2 , *
19 December 2014
Chemistry, Pd catalysis, amination, Buchwald-Hartwig reaction, quinolinequinones
Palladium-catalyzed Buchwald-Hartwig aminations of various quinolinequinone derivatives give excellent yields of novel 6-arylamino derivatives of the disubstituted quinolinequinones and 3-arylamino derivatives of the corresponding naphthoquinones. The precursor quinolinequinones are prepared in a three-step sequence from 8-hydroxyquinoline. The transition-metal-catalyzed arylations of 6,7-dibromo-5,8-quinolinequinone, 6,7-dichloro-5,8-quinolinequinone and 2,3-dichloro-1,4-naphthoquinone are reported for the first time and offer fast and easy access to their derivatives.
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