Junkai Fu, Dr. Hai Shang, Zhaofeng Wang, Dr. Le Chang, Wenbing Shao, Prof. Dr. Zhen Yang, Prof. Dr. Yefeng Tang
Angew. Chem. Int. Ed. 2013, 52, 4198
“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).
