Reaction of tetraphenylcyclopentadienone with cyclic olefins: an NMR probe of adduct stereochemistry

The Diels Alder adducts of tetraphenylcyclopentadienone with cyclohexene and norbornene are reported. The effect of cyclic olefin adduct stereochemistry on the multiplicity pattern in the aromatic region of the proton spectrum is discussed as a probe to adduct stereochemistry with this diene system.