Enone construction: A silver‐mediated olefin acylation reaction is described, in which five‐, six‐, and ‐seven‐membered rings, tetrasubstituted olefins, bridged bicycles, spirocycles, and benzoxepinones are prepared. Highly selective intermolecular reactions are coupled to a Nazarov cyclization for the effective preparation of cyclopentenones, including the core of modhephene (see scheme).