116950-31-3Relevant articles and documents
Synthesis of Sequential Polydepsipeptides Involving Depsipeptide Formation by the 2-Nitrophenylsulphenyl N-Carboxy α-Amino Acid Anhydride (Nps-NCA) Method
Katakai, Ryoichi
, p. 2249 - 2252 (2007/10/02)
Sequential polydepsipeptides containing a tripeptide sequence Ala-Ala-Glu(OEt) and various α-hydroxy acids have been successfully prepared by polycondensation of tetradepsipeptide pentachlorophenyl esters.The latter were synthesized by preparation of didepsipeptide free acids by the Nps-NCA method followed by active esterification and peptide chain elongation by the so-called 'back-up' procedure.