Palladium-Catalyzed Stereoretentive Olefination of Unactivated C(sp3)–H Bonds with Vinyl Iodides at Room Temperature: Synthesis of β‑Vinyl α‑Amino Acids

A method is reported for palladium-catalyzed N-quinolyl carboxamide-directed olefination of the unactivated C­(sp3)–H bonds of phthaloyl alanine with a broad range of vinyl iodides at room temperature. This reaction represents the first example of the stereoretentive installation of multisubstituted terminal and internal olefins onto unactivated C­(sp3)–H bonds. These methods enable access to a wide range of challenging β-vinyl α-amino acid products in a streamlined and controllable fashion, beginning from simple precursors.