Analogues of Fenarimol Are Potent Inhibitors of Trypanosoma cruzi and Are Efficacious in a Murine Model of Chagas Disease
摘要:
We report the discovery of nontoxic fungicide fenarimol (1) as an inhibitor of Trypanosoma cruzi (T. cruzi), the causative agent of Chagas disease, and the results of structure-activity investigations leading to potent analogues with low nM IC(50)s in a T. cruzi whole cell in vitro assay. Lead compounds suppressed blood parasitemia to virtually undetectable levels after once daily oral dosing in mouse models of T. cruzi infection. Compounds are chemically tractable, allowing rapid optimization of target biological activity and drug characteristics. Chemical and biological studies undertaken in the development of the fenarimol series toward the goal of delivering a new drug candidate for Chagas disease are reported.
3-Pyridinecarboxaldehyde: A Model System for Superelectrophilic Activation and the Observation of a Diprotonated Electrophile
作者:Douglas A. Klumpp、Siufu Lau
DOI:10.1021/jo9824908
日期:1999.10.1
3-Pyridinecarboxaldehyde (7) has been studied as a model system for superelectrophilic activation. When compound 7 is compared with benzaldehyde (3) in acid-catalyzed condensation reactions with arenes, 7 is more reactive than 3. Compound 7 reacts with chlorobenzene, o-dichlorobenzene, or nitrobenzene in CF3SO3H (triflic acid, TfOH) to give diaryl-3-pyridylmethanes, while 3 does not react with these deactivated arenes in TfOH. Moreover, 7 reacts with benzene in solutions as weakly acidic as H-o = -9, while 3 requires acidity in the range of H-o = -11.5 to -14 to reach a comparable level of electrophilic reactivity. Compound 7 was studied in acidic solution by C-13 NMR, and the diprotonated, dicationic species was observed at -60 degrees C in a solution of FSO3H-SbF5.
US4757076A
申请人:——
公开号:US4757076A
公开(公告)日:1988-07-12
Estrogen synthetase inhibitors. 2. Comparison of the in vitro aromatase inhibitory activity for a variety of nitrogen heterocycles substituted with diarylmethane or diarylmethanol groups
作者:C. David Jones、Mark A. Winter、Kenneth S. Hirsch、Nancy Stamm、Harold M. Taylor、Howard E. Holden、James D. Davenport、Eriks V. Krumkalns、Robert G. Suhr
DOI:10.1021/jm00163a065
日期:1990.1
The preparation and in vitroaromataseinhibitoryactivity of a wide variety of heterocyclic (4,4'-dichlorodiphenyl)methanes and -methanols are described. The choice of the two diaryl-bearing moieties as a vehicle for the evaluation of the heterocycles was made by the comparison of series of imidazole and pyridine-derived compounds with similar pyrimidine compounds reported previously. A structural
Analogues of Fenarimol Are Potent Inhibitors of Trypanosoma cruzi and Are Efficacious in a Murine Model of Chagas Disease
作者:Martine Keenan、Michael J. Abbott、Paul W. Alexander、Tanya Armstrong、Wayne M. Best、Bradley Berven、Adriana Botero、Jason H. Chaplin、Susan A. Charman、Eric Chatelain、Thomas W. von Geldern、Maria Kerfoot、Andrea Khong、Tien Nguyen、Joshua D. McManus、Julia Morizzi、Eileen Ryan、Ivan Scandale、R. Andrew Thompson、Sen Z. Wang、Karen L. White
DOI:10.1021/jm2015809
日期:2012.5.10
We report the discovery of nontoxic fungicide fenarimol (1) as an inhibitor of Trypanosoma cruzi (T. cruzi), the causative agent of Chagas disease, and the results of structure-activity investigations leading to potent analogues with low nM IC(50)s in a T. cruzi whole cell in vitro assay. Lead compounds suppressed blood parasitemia to virtually undetectable levels after once daily oral dosing in mouse models of T. cruzi infection. Compounds are chemically tractable, allowing rapid optimization of target biological activity and drug characteristics. Chemical and biological studies undertaken in the development of the fenarimol series toward the goal of delivering a new drug candidate for Chagas disease are reported.