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Antiprotozoal activity of dicationic 3,5-diphenylisoxazoles, their prodrugs and aza-analogues. | LitMetric

Antiprotozoal activity of dicationic 3,5-diphenylisoxazoles, their prodrugs and aza-analogues.

Bioorg Med Chem

University of North Carolina, Pathology & Laboratory Medicine, 805 Brinkhous-Bullitt Bldg, CB 7525, Chapel Hill, NC 27599-7525, USA. Electronic address:

Published: January 2014

AI Article Synopsis

Article Abstract

Fifty novel prodrugs and aza-analogues of 3,5-bis(4-amidinophenyl)isoxazole and its derivatives were prepared. Eighteen of the 24 aza-analogues exhibited IC₅₀ values below 25 nM against Trypanosoma brucei rhodesiense or Plasmodium falciparum. Six compounds had antitrypanosomal IC₅₀ values below 10 nM. Twelve analogues showed similar antiplasmodial activities, including three with sub-nanomolar potencies. Forty-four diamidines (including 16 aza-analogues) and the 26 prodrugs were evaluated for efficacy in mice infected with T. b. rhodesiense STIB900. Six diamidines cured 4/4 mice at daily 5 mg/kg intraperitoneal doses for 4 days, giving results far superior to pentamidine and furamidine. One prodrug attained 3/4 cures at daily 25 mg/kg oral doses for 4 days.

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Source
http://dx.doi.org/10.1016/j.bmc.2013.10.050DOI Listing

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