1 CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France. odile.dechycabaret@ensiacet.fr maryse.gouygou@lcc-toulouse.fr.
A novel intermolecular addition of aldehydes to 1,6-enynes via a Pt-carbene intermediate provides the diastereoselective formation of valuable tricyclic compounds.