3,3′-Disubstituted2,2′-binaphthyls were prepared by the Cu- or Re-catalyzed double benzannulation reaction of 2-(phenylethynyl)benzaldehyde with various butadiynes in the presence of trichloroacet...
An efficient and practical method for the synthesis of naphthalene derivatives via Fe(III)-catalyzed benzannulation of 2-(2-ozoethyl)-benzaldehydes and alkynes has been developed. The system holds the advantages of cheap catalysts, wide substrate scope, and mild reaction conditions.