Selective acylation of oxygenated naphthalenes

The synthesis of 1,4,5,7-teetraoxygenated naphthalenes is described, as well as their selective acylation at either C-3 or C-8 using either trifluoroacetic anhydride or acetic acid and trifluoroacetic anhydride; the potential of these reactions in the synthesis of naturally occurring naphthoquinones is referred to