The conjugate addition of an organocuprate to an enone followed by trapping of the resulting enolate as an enol triflate is a powerful strategy for the regioselective installation of double bonds (Scheme 1a). 1 Although it has been widely used in synthesis, this sequence is largely limited to intermolecular cases. In the intramolecular sense, the generation of the organometallic species is normally incompatible with the presence of an enone; in other words, Barbier ...
