Organocatalytic Highly Enantioselective Conjugate Addition of Aldehydes to Alkylidine Malonates

Abstract The first highly enantioselective, direct organocatalytic conjugate addition of unmodified aldehydes to alkylidinemalonates is presented. The reaction gives access to β‐formyl‐substituted malonates and highly functionalized lactones with up to 14:1 dr and generally 94 to >99% ee .