In our previous study, an unusualrearrangement reaction was discovered whereby dinaphthyl ketones with three hydroxy groups at restricted positions were transformed into a phenalenone ring and a benzene ring. Using the rearrangement as a key reaction, the first total syntheses of FR-901235 and auxarthrones A–D from an unstable triketone common intermediate are described. Furthermore, lamellicolic
The fungus Verticilliumlamellicola affords lamellicolicanhydride 1 (5 - methyl - 2,4.7 - trihydroxy -1,8 - naphthalicanhydride) together with small amounts of the quinone 2, the carbonate 3 and the chloro compound 4. Selective reactions of the functional groups in these and their derivatives have been used to interrelate these and effect conversion of 1 into 18, the anhydride obtained from Penicillium