Highly functionalized 2-oxopiperazine-based peptidomimetics: An approach to PAR1 antagonists
作者:Ángel M. Valdivielso、Pilar Ventosa-Andrés、Francisco Tato、M. Ángeles Fernández-Ibañez、Ioannis Pappos、Nikos E. Tsopanoglou、M. Teresa García-López、Marta Gutiérrez-Rodríguez、Rosario Herranz
DOI:10.1016/j.ejmech.2013.09.058
日期:2013.12
A series of pseudodipeptide-based chiral 1,3,4,5-tetrasubstituted-2-oxopiperazines has been designed and synthesized as potential PAR1 antagonists. These highly functionalized piperazines were synthesized from aromatic and basic amino acid derived Ψ[CH(CN)NH]pseudodipeptides through a four step pathway that involves reduction of the cyano group to build the 2-oxopiperazine ring, followed by selective
已设计并合成了一系列基于假二肽的手性1,3,4,5-四取代-2-氧哌嗪类化合物,作为潜在的PAR1拮抗剂。这些高度官能化的哌嗪是通过以下四个步骤从芳族和碱性氨基酸衍生的Ψ[CH(CN)NH]假二肽合成的,该过程涉及还原氰基以构建2-氧杂哌嗪环,然后在N 4处进行选择性官能化-,N 1-位,以及在C 5处的环外部分。这种区域选择性官能化需要反应条件的微调。筛选出所有新化合物作为由PAR1激动剂SFLLRN诱导的人血小板聚集抑制剂和人癌细胞系中的细胞毒剂。一些化合物表现出中等的PAR1拮抗剂活性,而另一些在μM浓度下具有细胞毒性。两种活动之间均未发现相关性。