Antimalarial effect of bis-pyridinium salts, N,N′-hexamethylenebis(4-carbamoyl-1-alkylpyridinium bromide)

The in vitro antimalarial activity of bis-pyridinium salts, N,N′-hexamethylenebis(4-carbamoyl-1-decylpyridinium bromide) and their derivatives, against the Plasmodium falciparum FCR-3 strain (ATCC 30932, chloroquine-sensitive) was evaluated. All test compounds exhibited antimalarial activity over a concentration range of 3.5 μM to 10 nM. The chain length of the N1-alkyl moiety was found to be very beneficial in terms of antimalarial activity, and in this series of compounds, the most appropriate N1-alkyl chain length was found to be eight.