Highly Enantioselective γ-Amination of α,β-Unsaturated Acyl Chlorides with Azodicarboxylates: Efficient Synthesis of Chiral γ-Amino Acid Derivatives.

The title quinidine-catalyzed reaction of cyclic or acyclic acyl chlorides affords dihydropyridazinones with high enantioselectivities, which can be converted into γ-amino amides or acids by reductive ring opening without loss of enantioselectivity.