Catalytic Asymmetric Intramolecular [4 2] Cycloaddition of In Situ Generated ortho‐Quinone Methides

Catalytic Asymmetric Intramolecular [4 2] Cycloaddition of In Situ Generated ortho‐Quinone Methides: Herein, we describe the first catalytic asymmetric intramolecular [4+2] cycloaddition of in situ generated ortho‐quinone methides. In the presence of a confined chiral imidodiphosphoric acid catalyst,...

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