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Junkai Fu, Dr. Hai Shang, Zhaofeng Wang, Dr. Le Chang, Wenbing Shao, Prof. Dr. Zhen Yang and Prof. Dr. Yefeng Tang Gold-Catalyzed Rearrangement of Allylic Oxonium Ylides: Efficient Synthesis of Highly Functionalized Dihydrofuran-3-ones Angewandte Chemie International Edition 52

Article first published online: 6 MAR 2013 | DOI: 10.1002/anie.201208305

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“Diazo” not needed: The title reaction results in the rearrangement of oxonium ylides, which were prepared from readily available homopropargylic allylic ethers instead of diazo compounds, through two different mechanisms: a concerted 2,3-sigmatropic rearrangement, or a stepwise 1,4-allyl migration followed by a Claisen rearrangement (see scheme).

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