Journal
JOURNAL OF MEDICINAL CHEMISTRY
Volume 60, Issue 3, Pages 957-971Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jmedchem.6b01163
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Funding
- National Instituted of Health [5R01AI106850]
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A previous publication from this lab (Patrick, et al. Bioorg. Med. Chim. 2016, 24, 2451-2465) explored the antitrypanosoinal activities of novel derivatives of 2-(2-benzamido)ethy1-4-phenylthiazole (1), which had been identified as a hit against Tiypanosoma,brucei, the causative agent of human African trypanosomiasis. While a number of these compounds, particularly the urea analogues, were quite potent, these molecules as a whole exhibited poor metabolic stability. The present work describes the synthesis of 65 new analogues arising from medicinal chemistry optimization at different sites on the molecule. The most promising coinpoimds. were the urea derivatives of 2-aryl-benzothiazol-5-amines. One such analogue, (S)-2(3,4-difluoropheny1)-5-(3-fluoro-Npyrrolidylamido)benzothiazole, (57) was chosen for in. vivo efficacy studies based upon in vitro activity, metabolic stability, and brain penetration. This compound attained 5/5 cures in murine models of both early and late stage human African trypanosomiasis, representing a new lead for the development of drugs to combat this neglected disease.
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