Epimerization Free Synthesis of O-Acyl Isodipeptides Employing COMU
作者:M. Samarasimhareddy、Hosahalli P. Hemantha、Kuppanna Ananda、Vommina V. Sureshbabu
DOI:10.2174/092986612799789413
日期:2012.4.1
O-Acyl isodipeptides are prepared by coupling Boc-Ser/Thr-OBzl with Fmoc-Xaa-OH employing COMU, well
known third generation peptide coupling agent. The reaction proceeds with high yield and the chemical homogeneity of
the synthesized molecules were established via chiral HPLC analyses. The O-acyl isodipeptide units play crucial role in
the success of ‘click peptide’ protocol employed for assembling ‘difficult sequence’ peptides.
The O-acylisopeptidemethod has recently received attention as an efficient synthetic method for peptides. Herein, forty kinds of "O-acyl isodipeptide unit" Boc-Ser/Thr(Fmoc-Xaa)-OH (1-40) were effectively synthesized in two-steps without epimerization. The O-acyl isodipeptide units are important building blocks to enable the routine use of the O-acylisopeptidemethod.
Depsipeptide Methodology for Solid-Phase Peptide Synthesis: Circumventing Side Reactions and Development of an Automated Technique via Depsidipeptide Units<sup>,</sup>
作者:Irene Coin、Rudolf Dölling、Eberhard Krause、Michael Bienert、Michael Beyermann、Calin Dan Sferdean、Louis A. Carpino
DOI:10.1021/jo060914p
日期:2006.8.1
depsipeptide technique is a recently developed method for peptide synthesis which is applicable to difficult sequences when the synthetic difficulty arises because of aggregation phenomena. In the present work, application of the depsipeptide method to extremely difficult sequences has been demonstrated and a serious side reaction involving diketopiperazine formation uncovered and subsequently avoided by the