Golebiowski, Adam Klopfenstein, Sean R. Shao, Xia Chen, Jack J. Colson, Anny-Odile Grieb, Arthur L. Russell, Anne F. Solid-Supported Synthesis of a Peptide β-Turn Mimetic The solid-supported synthesis of a bicyclic diketopiperazine, a potential peptide β-turn mimetic, is described. The Ugi reaction between the resin ester of α-<i>N</i>-Boc-diaminopropionic acid (an amine input), α-bromo acid, aldehyde, and isocyanide is the key step in the proposed protocol. bicyclic diketopiperazine;amine;resin ester;acid;Peptide;Ugi reaction;synthesis;peptide;aldehyde;bromo;isocyanide;Mimetic;Synthesi 2000-08-03
    https://acs.figshare.com/articles/journal_contribution/Solid-Supported_Synthesis_of_a_Peptide_-Turn_Mimetic/3736686
10.1021/ol006145s.s001