Reductive cyclization of α-cyclopropylketones with alkynyl- and aryl- tethered substituents

Article abstract of DOI:10.1016/S0040-4020(98)00323-8

Photoinduced electron transfer (PET) reactions of α-cyclopropyl- substituted ketones and triethylamine (TEA) were used to initiate the cyclopropylcarbinyl-homoallyl rearrangement. The intramolecular cyclization reaction onto triple bonds was performed yielding bicyclic and spirocyclic compounds. Furthermore, in some preliminary studies it was shown that even intramolecular aromatic substitutions are feasible.