Ferrocene-pyrimidine conjugates: Synthesis, electrochemistry, physicochemical properties and antiplasmodial activities
作者:Rakesh Chopra、Carmen de Kock、Peter Smith、Kelly Chibale、Kamaljit Singh
DOI:10.1016/j.ejmech.2015.05.043
日期:2015.7
The promise of hybrid antimalarial agents and the precedence set by the antimalarial drug ferroquine prompted us to design ferrocene-pyrimidine conjugates. Herein, we report the synthesis, electrochemistry and anti-plasmodial evaluation of ferrocenyl-pyrimidine conjugates against chloroquine susceptible NF54 strain of the malaria parasite Plasmodium falciparum. Also their physicochemical properties have been studied. (C) 2015 Elsevier Masson SAS. All rights reserved.
Primaquine–pyrimidine hybrids: Synthesis and dual-stage antiplasmodial activity
作者:Hardeep Kaur、Marta Machado、Carmen de Kock、Peter Smith、Kelly Chibale、Miguel Prudêncio、Kamaljit Singh
DOI:10.1016/j.ejmech.2015.06.045
日期:2015.8
A series of novel pyrimidine primaquine hybrids were synthesized and their effectiveness against the blood and liver stages of malaria parasites was evaluated. The hybrids displayed enhanced liver stage in vitro activity against P. berghei liver stage infection. (C) 2015 Elsevier Masson SAS. All rights reserved.
2-Aminopyrimidine based 4-aminoquinoline anti-plasmodial agents. Synthesis, biological activity, structure–activity relationship and mode of action studies
作者:Kamaljit Singh、Hardeep Kaur、Kelly Chibale、Jan Balzarini、Susan Little、Prasad V. Bharatam
DOI:10.1016/j.ejmech.2012.03.007
日期:2012.6
2-Aminopyrimidine based 4-aminoquinolines were synthesized using an efficacious protocol. Some of the compounds showed in vitro anti-plasmodial activity against drug-sensitive CQ(S) (3D7) and drug-resistant CQ(R) (K1) strains of Plasmodium falciparum in the nM range. In particular, 5-isopropyloxycarbonyl-6-methyl-4-(2-nitrophenyl)-2-[(7-chloroquinolin-4-ylamino)butylamino] pyrimidine depicted the lowest IC50 (3.6 nM) value (56-fold less than CQ) against CQ(R) strain. Structure activity profile and binding with heme, mu-oxo-heme have been studied. Binding assays with DNA revealed better binding with target parasite type AT rich pUC18 DNA. Most compounds were somewhat cytotoxic, but especially cytostatic. Molecular docking analysis with Pf DHFR allowed identification of stabilizing interactions. (C) 2012 Elsevier Masson SAS. All rights reserved.