Synthesis and Characterization of (Z)-5-Arylmethylidene-rhodanines with Photosynthesis-Inhibiting Properties
作者:Veronika Opletalova、Jan Dolezel、Katarina Kralova、Matus Pesko、Jiri Kunes、Josef Jampilek
DOI:10.3390/molecules16065207
日期:——
A series of rhodanine derivatives was prepared. The synthetic approach, analytical and spectroscopic data of all synthesized compounds are presented. Lipophilicity of all the discussed rhodanine derivatives was analyzed using the RP-HPLC method. The compounds were tested for their ability to inhibit photosynthetic electron transport (PET) in spinach (Spinacia oleracea L.) chloroplasts and reduce chlorophyll content in freshwater alga Chlorella vulgaris. Structure-activity relationships between the chemical structure, physical properties and biological activities of the evaluated compounds are discussed. For majority of the tested compounds the lipophilicity of the compound and not electronic properties of the R1 substituent were decisive for PET-inhibiting activity. The most potent PET inhibitor was (5Z)-5-(4-bromobenzylidene)-2-thioxo-1,3-thiazolidin-4-one (IC50 = 3.0 μmol/L) and the highest antialgal activity was exhibited by (5Z)-5-(4-chlorobenzylidene)-2-thioxo-1,3-thiazolidin-4-one (IC50 = 1.3 μmol/L).
一系列硫代酮衍生物被制备。展示了所有合成化合物的合成方法、分析及光谱数据。通过反相高效液相色谱法(RP-HPLC)分析了所有讨论的硫代酮衍生物的亲脂性。对这些化合物在菠菜(Spinacia oleracea L.)叶 chloroplasts 中抑制光合电子传递(PET)的能力以及在淡水藻类小球藻(Chlorella vulgaris)中降低叶绿素含量进行了测试。讨论了评估化合物的化学结构、物理性质与生物活性之间的构效关系。在大多数测试化合物中,化合物的亲脂性而非R1取代基的电子性质是决定PET抑制活性的关键。最强效的PET抑制剂是(5Z)-5-(4-溴苯甲叉基)-2-硫代-1,3-噻唑烷-4-酮(IC50 = 3.0 μmol/L),而最高的抗藻活性则由(5Z)-5-(4-氯苯甲叉基)-2-硫代-1,3-噻唑烷-4-酮(IC50 = 1.3 μmol/L)表现。