synthesis of a cyclic Arg-Gly-Asp (RGD) peptidecontaining a chloroalkene dipeptide isostere (CADI) is reported. By a developed synthetic method, an N-tert-butylsulfonyl protected CADI was obtained utilizing diastereoselective allylic alkylation as a key reaction. This CADI was also transformed into an N-Fmoc protected CADI in a few steps. The CADI was used in Fmoc-based solid-phase peptide synthesis.
Rapid, Traceless, Ag
<sup>I</sup>
‐Promoted Macrocyclization of Peptides Possessing an N‐Terminal Thioamide
作者:Varsha J. Thombare、Craig A. Hutton
DOI:10.1002/anie.201900243
日期:2019.4
Peptidemacrocyclization is often a slow process, plagued by epimerization and cyclodimerization. Herein, we describe a new method for peptidemacrocyclization employing the AgI‐promoted transformation of peptidethioamides. The AgI has a dual function: chemoselectively activating the thioamide and tethering the N‐terminalthioamide to the C‐terminal carboxylate. Extrusion of Ag2S generates an isoimide