Iron-Catalyzed Radical Addition Reaction of Dehydroglycine with Aliphatic Carboxylic Acids

Iron-catalyzed ligand-to-metal charge transfer (LMCT) processes have emerged as robust strategies for diverse organic transformations. Despite this potential, their application to addition reactions of C═N unsaturated bonds remains underexplored. Herein, we report an LMCT-enabled, photoredox/iron-catalyzed radical addition to dehydroglycine derivatives. This method employs readily available aliphatic carboxylic acids as radical precursors, enabling direct decarboxylative addition for the efficient synthesis of structurally diverse amino acid derivatives in excellent yields (up to 99%) without prefunctionalization. The protocol exhibits broad scope, including successful late-stage functionalization of pharmaceutically relevant molecules.