Abstract
AbstractSkeletal rearrangement of O‐propargylic formaldoximes, in the presence of gold catalysts, afforded 4‐methylene‐2‐isoxazolines in good to excellent yields by an intermolecular methylene transfer. In addition, the cascade reaction with maleimide in the presence of a gold catalyst afforded isoxazole derivatives by cyclization/methylene transfer and a subsequent ene reaction, whereas that using a copper catalyst gave oxazepines through a 2,3‐rearrangement.
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