A Novel One-Step Nickel-Mediated Synthesis of C6Ar6 Conjugated Hydrocarbons, Highly Substituted and Overcrowded Fulvenes and 3,4-Dimethylenecyclobutenes

Article abstract of DOI:10.1246/cl.1988.149

Nickel-catalyzed cyclo-oligomerization of aryl-substituted 1,1-dibromoethylenes in the presence or absence of diarylacetylenes produces 1,2,3,4,6,6-hexaarylfulvenes and/or 1,2-diaryl-3,4-bis(diarylmethylene)cyclobutenes in moderate yields, providing a new