Used as a key intermediate in the synthesis of immunomodulatory pharmaceuticals, particularly in the production of lenalidomide and related analogs. Its protected amine group and diketopiperazine core allow selective functionalization during multi-step drug synthesis. Commonly employed in solid-phase and solution-phase peptide-like coupling reactions to build complex heterocyclic structures with biological activity. Also utilized in medicinal chemistry research for developing novel cereblon E3 ligase modulators used in targeted protein degradation therapies.