N-protected α-amino acids are readily coupled with α-aminoacyl esters by polystyryl diphenylphosphine-iodine complex in very high yields and without detectable racemization. Protecting groups of general use for both amine and carboxyl functions, as well as the common side-chain-function protecting groups, are well tolerated under our experimental conditions. The workup is very easy since the only byproduct formed is a polymer-linked phosphine oxide that is simply filtered off to achieve the coupling product.
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
Sequential One-Pot Synthesis of Dipeptides through the Transient Formation of CDI-<i>N</i>-Protected α-Aminoesters
作者:Renata Marcia de Figueiredo、Jean-Simon Suppo、Camille Midrier、Jean-Marc Campagne
DOI:10.1002/adsc.201700034
日期:2017.6.6
The synthesis of dipeptides through a sequential one‐pot procedure from commercially available protectedaminoacids is described. The transformation relies on the use of in situ generated transiently CDI‐protected α‐amino esters (CDI, e.g. N,N′‐carbonyldiimidazole). In addition of being a highly atom‐economical process, the couplings take place under very mild and neutral conditions without adding
Amine Activation: “Inverse” Dipeptide Synthesis and Amide Function Formation through Activated Amino Compounds
作者:Eleonora Tosi、Jean-Marc Campagne、Renata Marcia de Figueiredo
DOI:10.1021/acs.joc.2c01288
日期:2022.9.16
A copper(II)/HOBt-catalyzed procedure for the synthesis of dipeptides and “general” amides has been developed using microwave irradiation to considerably hasten the reaction. As an alternative to using traditional carboxylic acid activation, the method relies on the use of N-acyl imidazoles as activated amino partners. By doing so, a nonconventional way to reach dipeptides and amides has been proposed
已开发出一种铜 (II)/HOBt 催化合成二肽和“一般”酰胺的方法,使用微波辐射可显着加速反应。作为使用传统羧酸活化的替代方法,该方法依赖于使用 N-酰基咪唑作为活化的氨基伙伴。通过这样做,通过具有挑战性且研究较少的 N → C 方向合成,提出了一种非常规的方法来获得二肽和酰胺。已成功合成了一系列二肽和“通用”酰胺,并且该方法的适用性已在克级合成中得到说明。所提出的温和反应条件完全适合在敏感氨基酸存在下进行偶联,从而提供没有可检测到的外消旋作用的产物。此外,