Synthesis and Functionalization of Azetidine‐Containing Small Macrocyclic Peptides
作者:George J. Saunders、Sam A. Spring、Eleanor Jayawant、Ina Wilkening、Stefan Roesner、Guy J. Clarkson、Ann M. Dixon、Rebecca Notman、Michael Shipman
DOI:10.1002/chem.202400308
日期:2024.5.17
Incorporation of a 3-aminoazetidine (3-AAz) into peptide backbones improves head-to-tail cyclizations compared to unmodified peptides. The azetidine nitrogen can be readily functionalized using substitution or click chemistry. Crystal structure analysis reveals that a 3-AAz modified cyclic tetrapeptide adopts an uncommon all-trans conformation. The 3-AAz provides stability to protease degradation compared
2-phenyl isopropyl esters as car☐yl terminus protecting groups in the fast synthesis of peptide fragments
作者:Chongwei Yue、Josiane Thierry、Pierre Potier
DOI:10.1016/s0040-4039(00)60578-6
日期:1993.1
The esters of Fmoc aminoacids derived from 2-phenylisopropanol have been prepared by using 2-phenylisopropyltrichloroacetimidate 1. They prevent diketopiperazine formation during amino deprotection of dipeptides and can be cleaved in the presence of Boc and O-Bu(t). They are thus well suited for the protection of C-terminus when a Fmoc strategy is used to build up peptide fragments.