Hervé Corlay, Eric Fouquet, Emmanuel Magnier and William B. Motherwell
Cyclopropyl tethered methylenecyclopropanes can function in the intramolecular Pauson–Khand reaction either as simple alkene components, or give rearranged hydroindenones in which neither of the two carbon atoms of the alkyne component form part of the cyclopentenone unit in the product.
rogl, M. Pour and A. Gogoll, J. Am. Chem. Soc., 1994, 116, 186 Search PubMed.