Synthesis, Leishmanicidal and Cytotoxic Activity of Triclosan-Chalcone, Triclosan-Chromone and Triclosan-Coumarin Hybrids
作者:Elver Otero、Sebastián Vergara、Sara Robledo、Wilson Cardona、Miguel Carda、Ivan Vélez、Carlos Rojas、Felipe Otálvaro
DOI:10.3390/molecules190913251
日期:——
Twelve hybrids derived from triclosan were obtained via Williamson etherification of O-triclosan alkyl bromide plus chalcone and O-coumarin or O-chromone alkyl bromide plus triclosan, respectively. Structures of the products were elucidated by spectroscopic analysis. The synthesized compounds were evaluated for antileishmanial activity against L. (V) panamensis amastigotes. Cytotoxic activity was also evaluated against mammalian U-937 cells. Compounds 7–9 and 17, were active against Leishmania parasites (EC50 = 9.4; 10.2; 13.5 and 27.5 µg/mL, respectively) and showed no toxicity toward mammalian cells (>200 µg/mL). They are potential candidates for antileishmanial drug development. Compounds 25–27, were active and cytotoxic. Further studies using other cell types are needed in order to discriminate whether the toxicity shown by these compounds is against tumor or non-tumor cells. The results indicate that compounds containing small alkyl chains show better selectivity indices. Moreover, Michael acceptor moieties may modify both the leishmanicidal activity and cytotoxicity. Further studies are required to evaluate if the in vitro activity against Leishmania panamensis demonstrated here is also observed in vivo.
通过Williamson醚化反应,分别从O-三氯生烷基溴与查耳酮及O-香豆素或O-色酮烷基溴与三氯生的反应中获得了12种三氯生的杂交体。通过光谱分析阐明了产物的结构。合成的化合物被评估为抗利什曼活性,针对L.(V)巴拿马ensis无鞭毛体。对哺乳动物U-937细胞也进行了细胞毒活性评估。化合物 7-9 和 17,对利什曼原虫有活性(EC50 = 9.4;10.2;13.5 和 27.5 µg/mL,分别),对哺乳动物细胞没有毒性(>200 µg/mL)。它们是抗利什曼病药物开发的潜在候选者。化合物 25-27,具有活性和细胞毒性。需要使用其他细胞类型进行进一步的研究,以区分这些化合物所显示的毒性是针对肿瘤细胞还是非肿瘤细胞。结果表明,含有小烷基链的化合物显示出更好的选择性指数。此外,迈克尔受体基团可能同时修饰利什曼虫杀灭活性和细胞毒性。需要进一步的研究来评估这里展示的体外对巴拿马ensis利什曼原虫的活性是否也在体内观察到。