Abstract
AbstractBicyclo[n.2.0]cyclobutenes were transformed into medium-sized cyclic γ-aryl enones by using a cationic aryl palladium(II) species generated from a diazonium salt. The reaction proceeded at ambient temperature by capturing the cis,trans-cycloalkadiene intermediate generated through a conrotatory 4π-electrocyclic ring-opening reaction, followed by a Heck–Matsuda arylation sequence. Optically pure γ-aryl enones were also synthesized by using a point-to-planar-to-point chirality-transfer process.
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