Acetylation of some novel hemicholinium compounds by soluble choline acetyltransferase: structure-activity relationships
作者:S. Martin Shreeve、G. B. A. Veitch、Brian A. Hemsworth
DOI:10.1021/jm00372a009
日期:1984.6
number of methylene groups inserted between the two phenyl rings. This study examines the significance of the internitrogen distance in these compounds with regard to their acetylation by soluble choline acetyltransferase (ChAc) in vitro. The hemicholinium compounds were incubated with [14C] acetylcoenzyme A and any acetylated products were isolated by liquid ion exchange. Only HC-3 and the analogue with
Synthesis and Structure–Activity Analysis of New Phosphonium Salts with Potent Activity against African Trypanosomes
作者:Andrea Taladriz、Alan Healy、Eddysson J. Flores Pérez、Vanessa Herrero García、Carlos Ríos Martínez、Abdulsalam A. M. Alkhaldi、Anthonius A. Eze、Marcel Kaiser、Harry P. de Koning、Antonio Chana、Christophe Dardonville
DOI:10.1021/jm2014259
日期:2012.3.22
A series of 73 bisphosphonium salts and 10 mono-phosphonium salt derivatives were synthesized and tested in vitro against several wild type and resistant lines of Trypanosoma brucei (T. b. rhodesiense STIB900, T. b. brucei strain 427, TbAT1-KO, and TbB48). More than half of the compounds tested showed a submicromolar EC50 against these parasites. The compounds did not display any cross-resistance to existing diamidine therapies, such as pentamidine. In most cases, the compounds displayed a good selectivity index versus human cell lines. None of the known T. b. brucei drug transporters were required for trypanocidal activity, although some of the bisphosphonium compounds inhibited the low affinity pentamidine transporter. It was found that phosphonium drugs act slowly to clear a trypanosome population but that only a short exposure time is needed for irreversible damage to the cells. A comparative molecular field analysis model (CoMFA) was generated to gain insights into the SAR of this class of compounds, identifying key features for trypanocidal activity.
Gryszkiewicz-Trochimowski et al., Bulletin de la Societe Chimique de France, 1958, p. 1156,1158