Copper‐catalyzedconjugateaddition: A highlyenantioselectiveconjugateaddition of cyclicdiketones to β,γ‐unsaturated α‐ketoesters was achieved by using a two‐carbon‐linked N,N′‐dioxide‐Cu(OTf)2complex. Excellent yields (up to 99 %) and enantioselectivities (up to 99 % ee) were obtained with 2 mol % catalyst loading (see scheme). By using this method, adducts could be easily transformed into hexahydroquinolines