Trypanosoma cruzi and Trypanosoma brucei are the parasitic causative agents of Chagas disease and human African trypanosomiasis (HAT), respectively. The drugs currently used to treat these diseases are not efficacious against all stages and/or parasite sub-species, often displaying side effects. Herein, we report the SAR exploration of a novel hit, 2-(4-chlorophenyl)-N-(1-propyl-1H-benzimidazol-2-yl)acetamide previously identified from high throughput screens against T. cruzi, Trypanosoma brucei brucei and Leishmania donovani. An informative set of analogues was synthesized incorporating key modifications of the scaffold resulting in improved potency whilst the majority of compounds retained low cytotoxicity against H9c2 and HEK293 cell lines. The SAR observed against T. cruzi broadly matches that observed against T.b. brucei, suggesting the possibility for a broad-spectrum candidate. This class of compounds therefore warrants further investigation towards development as a treatment for Chagas disease and HAT.

中文翻译：

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新型苯并咪唑苯基乙酰胺作为广谱锥虫的全过程优化

克鲁氏锥虫和布鲁氏锥虫分别是恰加斯氏病和人类非洲锥虫病（HAT）的寄生病原体。当前用于治疗这些疾病的药物对于所有阶段和/或寄生虫亚种并不是有效的，经常表现出副作用。本文中，我们报告了先前从高通量筛选中发现的针对T. cruzi，布鲁氏锥虫的新型命中的2-（4-氯苯基）-N-（1-丙基-1 H-苯并咪唑-2-基）乙酰胺的SAR探索。布鲁西和利什曼原虫。合成了一组信息丰富的类似物，其中掺入了支架的关键修饰，从而提高了效力，而大多数化合物对H9c2和HEK293细胞系保留了低细胞毒性。针对克氏锥虫观察到的SAR与针对Tb brucei观察到的SAR大致相同，这表明有可能使用广谱候选物。因此，这类化合物值得进一步研究以开发作为南美锥虫病和HAT的治疗药物。