The scope of MgI2 as a valuable tool for quantitative and mild chemoselective cleavage of protectinggroups is described here. This novel synthetic approach expands the use of protectinggroups, widens the concept of orthogonality in synthetic processes, and offers a facile opportunity to release compounds from solid supports.
Facile synthesis of a peptidic Au(<scp>i</scp>)-metalloamphiphile and its self-assembly into luminescent micelles in water
作者:Benedict Kemper、Yana R. Hristova、Sebastian Tacke、Linda Stegemann、Laura S. van Bezouwen、Marc C. A. Stuart、Jürgen Klingauf、Cristian A. Strassert、Pol Besenius
DOI:10.1039/c4cc03868a
日期:——
We report a short synthetic route for the preparation of a peptidic Au(i)-metalloamphiphile which, in buffered environments of physiological ionic strength, self-assembles into luminescent micellar nanostructures of 14 nm in diameter.
Triblock Peptide and Peptide Thioester Synthesis With Reactivity-Differentiated Sulfonamides and Peptidyl Thioacids
作者:David Crich、Indrajeet Sharma
DOI:10.1002/anie.200903050
日期:2009.9.28
One after the other: Triblock peptide synthesis was achieved at ambient temperature by sequential reaction of sulfonamide‐protected peptidyl thioacids first with highly reactive 2,4‐dinitrobenzenesulfonamides and second with more moderately reactive sulfonamides to produce the oligopeptides in good yields. The method is compatible with C‐terminal thioesters and thus presents a new approach for native
一个接一个:三嵌段肽的合成是在环境温度下通过磺酰胺保护的肽基硫酸首先与高反应性的 2,4-二硝基苯磺酰胺,然后与反应性中等的磺酰胺顺序反应来实现的,从而以良好的收率生产寡肽。该方法与 C 端硫酯兼容,因此为天然化学连接策略提供了一种新方法。
Inverse Peptide Synthesis via Activated α-Aminoesters
作者:Jean-Simon Suppo、Gilles Subra、Matthieu Bergès、Renata Marcia de Figueiredo、Jean-Marc Campagne
DOI:10.1002/anie.201402147
日期:2014.5.19
procedure for peptide‐bond formation is reported. Instead of activation of the carboxylic acid functionality, the reaction involves an unprecedented use of activated α‐aminoesters. The method provides a straightforward entry to dipeptides and was effective when a sensitive cysteine residue was used, as no epimerization was detected in this case. The applicability of this method to iterative peptide synthesis
cyclodimer 10. In all cases, when starting with racemic material, only the trans-substituted cyclodepsipeptides were isolated. Simple molecular modeling revealed that the formation of the cyclodimer is thermodynamically slightly more favorable than that of the cyclomonomer. The proposal that cyclodimer formation is preferred because of the presence of intramolecular H-bonds could not be confirmed by X-ray