Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) that require pyrrolidine-based scaffolds. Its protected amine group allows for selective reactions at other functional sites, making it valuable in multi-step organic syntheses. Commonly employed in the preparation of central nervous system agents, including antidepressants and antipsychotics, due to the structural relevance of the pyrrolidine ring in bioactive molecules. Also utilized in medicinal chemistry for building libraries of compounds during drug discovery, where the ester group can be hydrolyzed or transformed into amides to modulate biological activity.