2,5-Piperazinedione, can be used as an intermediate in the preparation of various pharmaceutical and biologically active compounds. It can be used in the synthesis of dipeptide isosteres by cross-metathesis.||Alternate Name:|2,5-Diketopiperazine; 2,5-Dioxopiperazine; Cyclo(Gly-Gly); Cyclo(glycylglycyl); Cyclodiglycine; Cycloglycylglycine; Diglycolyl Diamide; Diketopiperazine; Glycine Cyclic Dimer; N-glycylglycine Cyclic Peptide; Glycylglycine Lactam; NSC 26345; α,γ-Diacipiperazine||CAS Number:|106-57-0||Molecular Formula:|C₄H₆N₂O₂||Molecular Weight:|114.1||Melting Point:|>250°C (dec.)||Solubility:|DMSO (Slightly, Heated), Methanol (Slightly, Heated)||Storage and Stability:|RT