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,
Synthesis and analgesic activities of urea derivatives of α-amino-N-pyridyl benzene propanamide
摘要:
New urea L-phenyl alanine derivatives of 4-aminopyridine have been synthesized and evaluated for analgesic activity with the PBQ writhing test in mice and the Randall-Selitto test in rats. Potent oral activity (ID50 < 10 mg/kg) and good tolerance were found in alkyl, arylalkyl and carboxyalkyl urea derivatives. The analgesic activity was found to be totally dependent on the pyridine moiety and was at least partly inhibited by pretreatment with (alpha) methyltyrosine, as was the case for 4-aminopyridine. These compounds are therefore pharmacologically interesting as new analgesic derivatives of 4-aminopyridine. They have a higher oral activity and a better activity/tolerance profile.
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