Copper Triflate–Catalyzed Cross‐Aldol Condensation: A Facile Synthesis of α,α′‐Bis(Substituted Benzylidene) Cycloalkanones

A facile, efficient, and clean procedure is described for synthesis of α,α′‐bis(substituted benzylidene) cycloalkanones with good yields by the reaction of cycloalkanones with aromatic aldehydes using Cu(OTf)2 as catalyst. The catalyst was easily recovered and reused without loss of activity.