Used in pharmaceutical synthesis as a chiral building block, particularly in the development of active pharmaceutical ingredients (APIs) requiring stereochemical control. Its hydroxymethyl and amine functionalities allow for further chemical modifications, making it valuable in constructing complex molecules. Commonly employed in the preparation of protease inhibitors and other bioactive compounds where a pyrrolidine scaffold enhances metabolic stability and target binding. The Cbz-protected amine ensures selective reactivity during multi-step syntheses, especially in peptide-related chemistry and heterocyclic drug candidates.