A new method for the stepwise synthesis of depsipeptides
作者:Ryoichi Katakai
DOI:10.1039/c39880001229
日期:——
Depsipeptides have been prepared in a stepwise fashion by a method using the dichloroacetyl (Dca) group as a suitable protecting group for the hydroxy group of hydroxy acids and 2-nitrophenylsulphenyl (Nps)N-carboxyα-aminoacidanhydrides (NCAs) as a highly reactive amino acid derivative to acylate the hydroxy compounds.
A NEW METHOD FOR PEPTIDE SYNTHESIS USING<i>o</i>-NITROPHENYLSULFENYL<i>N</i>-CARBOXY α-AMINO ACID ANHYDRIDES
作者:Ryoichi Katakai、Masanao Oya
DOI:10.1246/cl.1974.1529
日期:1974.12.5
New method for peptide synthesis using o-nitrophenylsulfenyl α-aminoacidanhydrides (Nps-NCAs) is reported. The methodinvolves the reaction of the Nps-NCA with an amino acid ester or a peptide ester to give a N-protected peptide ester by the Nps group. Some peptide derivatives have been easily prepared without racemization in very high yields by the new method. The advantages of this method may result