Reactions of Aza- and Diazaanthraquinone N-Oxides.
1995
Abstract 1-Azaanthracene-2,5,8-triones and 1,8-diazaanthracene-2,7,9,10-tetraones, which are structurally related to diazaquinomycin, are prepared by functionalization of azaathraquinone N-oxides. The complete procedure implies a Diels-Alder reaction as a key step, followed by N-oxidation and treatment of the N-oxides with benzoyl or tosyl chlorides in the presence of water.
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