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Using new variations of anionic aromatic chemistry, the total synthesis of oxygenated brazanquinones ( 1a-1c ), derived from β-brasan, a natural product isolated from  Caesalpina echinata , via carbamates  2a-2c  is described.

Total syntheses of oxygenated brazanquinones via regioselective homologous anionic Fries rearrangement of benzylic O-carbamates