Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of peptide-based drugs and bioactive compounds. Its cyclic structure provides stability and conformational rigidity, making it valuable in drug design for enhancing metabolic stability and binding selectivity. Also employed in research for creating novel heterocyclic compounds with potential antimicrobial or anticancer properties. Commonly found in studies related to diketopiperazine derivatives, which show activity in central nervous system agents and enzyme inhibitors.