Raney Cobalt: An Effective and Recyclable Catalyst for the Pauson–Khand Reaction

Commercially available Raney cobalt is broadly applicable as a catalyst in intra‐ and intermolecular Pauson–Khand reactions (PKR). The activity of Raney cobalt compares favourably with that of previously described heterogeneous or heterogenised cobalt systems. The major reaction pathway appears to occur at the solid catalyst which can be efficiently separated and reused by filtration and/or exploiting its ferromagnetic properties.