Synthesis, characterization and in vitro antitrypanosomal activities of new carboxamides bearing quinoline moiety

The reported toxicities of current antitrypanosomal drugs and the emergence of drug resistant trypanosomes underscore the need for the development of new antitrypanosomal agents. We report herein the synthesis and antitrypanosomal activity of 24 new amide derivatives of 3-aminoquinoline, bearing substituted benzenesulphonamide. Nine of the new derivatives showed comparable antitrypanosomal activities at IC(50) range of 1–6 nM (melarsoprol 5 nM). Compound 11n and 11v are more promising antitrypanosomal agents with IC(50) 1.0 nM than the rest of the reported derivatives. The novel compounds showed satisfactory predicted physico-chemical properties including oral bioavailability, permeability and transport properties.