Abstract
A concise synthesis of auxofuran (1) was developed. Starting with a Sonogashira cross-coupling reaction, enynol (10) was prepared. A gold(I) catalyzed cycloisomerization led to disubstituted furan 12. Via an intramolecular Friedel-Crafts cyclization, a dihydrobenzofuranone was obtained. Functional group manipulations, including benzylic oxidation, led to the target molecule.
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