Stereospecific synthesis of arylidene and allylidene cyclopentanes by a palladium-catalyzed cylisation

Article abstract of DOI:10.1016/S0040-4039(00)97827-4

Vinyl and aryl halides react with ε-acetylenic β-diesters, β-keto esters and βsulfonylesters in the presence of a Pd(o) catalyst leading in good yields to the title compounds. The acetylenic homolog containing an additional carbon leads in the same conditions to a cyclohexane, but this process then competes with the arylation of the terminal acetylenic carbon.