Abstract
A methodological study towards the total synthesis of marmycin A/B is described exploiting a commercial anthraquinone molecule as model compound. The challenging synthetic pathway uncovers a copper-catalysed Ullmann cross-coupling to attach the sugar backbone by means of C–N bond formation and, finally, an intramolecular Friedel–Crafts C–C glycosylation to successfully afford the core structure of marmycin A. This methodology has been successfully applied to the genuine anthraquinone moiety leading to the natural product and simpler structural analogues.
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