Rh/Cu‐Catalyzed Cascade [4 2] Vinylic C−H O‐Annulation and Ring Contraction of α‐Aryl Enones with Alkynes in Air

Angewchem
Rh/Cu‐Catalyzed Cascade [4 2] Vinylic C−H O‐Annulation and Ring Contraction of α‐Aryl Enones with Alkynes in Air: An unprecedented Rh‐catalyzed ketone‐directed vinylic C−H activation/[4+2] O‐annulation of α‐aryl enones with internal alkynes followed by a Cu‐catalyzed ring contraction in air to provide multiaryl‐substituted...

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