The present disclosure relates to certain new and known triazolium and/or imidazolium salts and to their therapeutic use, for example in methods of treating or preventing an infection by a
Plasmodium
or
Babesia
parasite in a subject in need thereof. The triazolium and imidazolium salts are compounds of the Formula (I) or (II): wherein R
1
-R
4
, R
1′
-R
3′
, R
8
-R
11
, X, X′, X″, Y, Y′ and Y″ are as defined in the disclosure.
The anti-malarial activity of bivalent imidazolium salts
作者:Jason Z. Vlahakis、Simona Mitu、Gheorghe Roman、E. Patricia Rodriguez、Ian E. Crandall、Walter A. Szarek
DOI:10.1016/j.bmc.2011.06.002
日期:2011.11
A series of compounds containing bivalent imidazolium rings and one triazolium analog were synthesized and evaluated for their ability to inhibit the replication of Plasmodium falciparum cultures. The activity and selectivity of the compounds for P. falciparum cultures were found to depend on the presence of electron-deficient rings that were spaced an appropriate distance apart. The activity of the compounds was not critically dependent on the nature of the linker between the electron-deficient rings, an observation that suggests that the rings were responsible for the primary interaction with the molecular target of the compounds in the parasite. The bivalent imidazolium and triazolium compounds disrupted the process whereby merozoites gain entry into erythrocytes, however, they did not appear to prevent merozoites from forming. The compounds were also found to be active in a murine Plasmodium berghei infection, a result consistent with the compounds specifically interacting with a parasite component that is required for replication and is conserved between two Plasmodium species. (C) 2011 Elsevier Ltd. All rights reserved.
Self-assembly of [2]pseudorotaxanes based on pillar[5]arene and bis(imidazolium) cations
A simple bis(imidazolium) dication, 1,4-bis[N-(N′-hydroimidazolium)]butane, can act as a new template for formation of [2]pseudorotaxane with pillar[5]arene, in which the dethreading/rethreading process can be controlled by addition of base and acid. The effect on the association constant of both the solvent and counterion is also described.