elongate the ‘C-terminal part’ of the molecule. Therefore, we were able to explore mimics of the substance P analogs described as inverse agonists. Some compounds presented affinities in the nanomolar range and potent biological activities, while one exhibited a partial inverse agonist behavior similar to a Substance P analog.
Synthesis of [1,2,4]Triazolo[4,3-<i>a</i>]piperazin-6-ones: An Approach to the Triazole-Fused Ketopiperazine Scaffold
作者:Khoubaib Ben Haj Salah、Baptiste Legrand、Mathieu Bibian、Emmanuel Wenger、Jean-Alain Fehrentz、Séverine Denoyelle
DOI:10.1021/acs.orglett.8b01112
日期:2018.6.1
stereoconservative synthesis to access the triazole-fused ketopiperazine (TKP) scaffold is presented. This underexplored platform offers a wide range of structural modulations with several points of diversity and chiral centers. A series of [1,2,4]triazolo[4,3-a]piperazin-6-ones was synthesized from optically pure dipeptides. The methodology was then successfully applied to access the pyrrolo[1,2-a]triazolo[3,4-c]piperazin-6-one
提出了立体保守的合成,以接近三唑融合的酮哌嗪(TKP)支架。这个开发不足的平台可提供多种结构调制,并具有多个多样性点和手性中心。从光学纯的二肽合成了一系列[1,2,4]三唑并[4,3 - a ]哌嗪-6-。该方法然后成功地应用于访问吡咯并[1,2- a ]三唑并[3,4- c ]哌嗪-6-一三轮车。重要的是,代表性TKP的晶体结构证实在合成路线中手性中心的构型是受控的,并且取决于取代基的性质和在TKP支架上的位置有利于描述取代基的取向。
Exploring the reaction of formaldehyde with α-<i>N</i>-protected amino acid hydrazides
The reaction of formaldehyde with enantiomerically pure α-N-protected amino acidhydrazides is described. The system has been investigated in different solvents, including both aqueous formaldehyde and paraformaldehyde, with the aim of simplifying the final reaction mixture. Aqueous formaldehyde in refluxing THF proved to be the best combination, affording mainly the corresponding monomeric N-methylene