Peptide-Catalyzed Stereoselective Conjugate Addition Reactions Generating All-Carbon Quaternary Stereogenic Centers

A powerful catalyst: Quaternary stereogenic centers adjacent to tertiary stereocenters were formed with high diastereoselectivities and enantioselectivities in conjugate addition reactions between aldehydes and β,β‐disubstituted nitroolefins by using a peptidic catalyst (see scheme). γ‐Amino acids and heterocyclic compounds bearing quaternary stereogenic centers are easily accessible from the products.