Improved Catalytic Activity of Cyclopentadienylcobalt in the Preparation of Pyridines from Acetylenes and Nitriles

Article abstract of DOI:10.1246/bcsj.58.2715

The catalytic activity of cyclopentadienylcobalt increases greatly upon introducing a methoxycarbonyl group into the cyclopentadienyl ring, and by carrying out the reaction with a rigorous exclusion of oxygen.Among the precursors we have examined, the most active one was z)(cot)> (Cp^z = methoxycarbonyl-substituted cyclopentadienyl; cot = cyclooctatetraene) which can generate the active species at 100 deg C.