Observations on the versatility of methylenecyclopropanes as olefinic components in the intramolecular Pauson–Khand reaction
Abstract
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.