Facile synthesis of 3, 3′-disubstituted 2, 2′-binaphthyls by transition-metal-catalyzed double benzannulation

Article abstract of DOI:10.1246/cl.140169

3, 3′-Disubstituted 2, 2′-binaphthyls were prepared by the Cuor Re-catalyzed double benzannulation reaction of 2-(phenylethynyl) benzaldehyde with various butadiynes in the presence of trichloroacetic acid, in moderate to good yields. Acceleration of the second benzannulation was clearly observed.