Novel cinnamic acid/4-aminoquinoline conjugates bearing non-proteinogenic amino acids: Towards the development of potential dual action antimalarials
作者:Bianca C. Pérez、Cátia Teixeira、Marta Figueiras、Jiri Gut、Philip J. Rosenthal、José R.B. Gomes、Paula Gomes
DOI:10.1016/j.ejmech.2012.05.022
日期:2012.8
A series of cinnamic acid/4-aminoquinoline conjugates conceived to link, through a proper retro-enantio dipeptide, a heterocyclic core known to prevent hemozoin formation, to a trans-cinnamic acid motif capable of inhibiting enzyme catalytic Cys residues, were synthesized as potential dual-action antimalarials. The effect of amino acid configuration and the absence of the dipeptide spacer were also
合成了一系列肉桂酸/ 4-氨基喹啉共轭物,它们通过适当的逆对映体二肽(一种已知可防止血红蛋白形成的杂环)连接至能够抑制酶催化Cys残基的反式肉桂酸基序。双重作用的抗疟药。还评估了氨基酸构型的影响和二肽间隔子的缺失。用其天然的L对应物替代D-氨基酸会导致抗疟原虫和falcipain抑制活性均下降,这表明前者是可取的。与这样的间隔分子是活性抗血液阶段疟原虫,在体外,和血红蛋白的形成,这暗示二肽在介导这两个活性中具有关键作用。反过来,不带间隔基的化合物则是更好的falcipain-2抑制剂,这可能是因为这些化合物较小,并且其乙烯基键更靠近催化Cys,如分子模型计算所表明的那样。这些新颖的结合物构成了针对针对血液阶段疟疾寄生虫的新型抗疟原虫的开发的有前途的线索。