L-Ornithine lactam is a synthetic intermediate.1,2 It has been used in the synthesis of dipeptidyl peptidase 4 (DPP-4) inhibitors, as well as signaling peptides.
1.Abe, M., Akiyama, T., Umezawa, Y., et al.Synthesis and biological activity of sulphostin analogues, novel dipeptidyl peptidase IV inhibitorsBioorg. Med. Chem.13(3)785-797(2005) 2.Barnett, R., Raszkowski, D., Winckler, T., et al.Versatile synthesis of the signaling peptide glorinBeilstein J. Org. Chem.13247-250(2017)