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Gold-Catalyzed Ring Expansion of Enyne-Lactone: Generation and Transformation of 2‑Oxoninonium

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posted on 19.10.2017, 15:09 by Kui Luo, Tongxiang Cao, Huanfeng Jiang, Lianfen Chen, Shifa Zhu
An efficient gold-catalyzed ring-expansion reaction of enyne-lactones to form 2-oxoninonium intermediates is reported. The 2-oxoninonium generated in this work could undergo further 6π electrocyclization and aromatization reaction to produce different aromatic compounds.