Abstract
A highly efficient asymmetric conjugate addition of carbonyl donors to α,β‐unsaturated aldehydes is realized with 6′‐OH cinchona alkaloids as bifunctional organocatalysts. A wide range of α‐substituted β‐ketoesters and α‐substituted α‐cyanoacetates can be employed as donors, whereas acrolein and β‐substituted α,β‐unsaturated aldehydes are suitable acceptors for this enantioselective addition.