动力学研究表明,阴离子亲核试剂OH-,CN-和N 3-与苯甲酰基以及芳氧基部分上具有取代基的苯甲酸芳基酯在25.0的H2O-20 mol%的二甲亚砜中反应这些系统的Hammett log k vs sigma图始终是非线性的。但是,考虑了一种可能的传统解释,该解释涉及速率确定步骤的变化导致具有曲率的四面体中间体的机理,但被拒绝了。提出的解释涉及通过两阶段机理中的苯甲酰基取代基和亲电子羰基中心之间的共振相互作用实现基态稳定。因此,基于Yukawa-Tsuno方程很好地容纳了数据,该方程给出了所有三种亲核试剂的线性图。
Design, Synthesis and Evaluation of Rhodanine Derivatives as Aldose Reductase Inhibitors
摘要:
Aldose reductase (ALR) enzyme plays a significant role in conversion of excess amount of glucose into sorbitol in diabetic condition, inhibitors of which decrease the secondary complication of diabetes mellitus. To understand the structural interaction of inhibitors with ALR enzyme and develop more effective ALR inhibitors, a series of substituted 5‐phenylbenzoate containing N‐substituted rhodanine derivatives were synthesized and evaluated for their in vitro ALR inhibitory activity. Docking studies of these compounds were carried out, which revealed that the 5‐phenylbenzoate moiety deeply influenced the key π‐π stacking while 4‐oxo‐2‐thioxothiazolidines contributed in hydrogen bond interactions. The phenyl ring of benzylidene system occupied in specific pocket constituted from Phe115, Phe122, Leu300 and Cys303 while the rhodanine ring forms a tight net of hydrogen bond with Val47 at anionic binding site of the enzyme. The structural insights obtained from the docking study gave better understanding of rhodanine and macromolecular interaction and will help us in further designing and improving of ALR inhibitory activity of rhodanine analogs.
fibroblast cell lines. According to the results obtained, compound (VI) (IC50: 16.82 ± 0.17 μM) showed higher ABTS cation radical scavenging activity than BHA (IC50: 17.59 ± 0.10 μM). In CUPRAC assay, it was determined that the activity ordering of the bioactive molecules has been determined as VII > X > VII > α-TOC > IX > I > II > V > VI. In AChE assay, compound (I) indicated a high potent inhibition activity
摘要 在这项研究中,合成了一些源自 4-氨基安替比林 (4-AAP) ( VI – X ) 的席夫碱,通过元素分析 (C、H、N) 和三种光谱技术 (FT-IR、1 H 和13 C NMR),然后通过采用四种不同的方法研究它们的抗氧化活性。随后,测试了合成的分子对乙酰胆碱酯酶(AChE)、丁酰胆碱酯酶(BChE)、酪氨酸酶的抑制作用。更重要的是,还评估了所有标题分子对 HeLa 人宫颈癌和 L929 小鼠成纤维细胞系的细胞毒作用。根据所得结果,化合物 ( VI ) (IC 50: 16.82 ± 0.17 μM) 显示出比 BHA 更高的 ABTS 阳离子自由基清除活性 (IC 50 : 17.59 ± 0.10 μM)。在 CUPRAC 测定中,确定生物活性分子的活性排序已确定为VII > X > VII > α-TOC > IX > I > II > V > VI。在 AChE 测定中,化合物
Molecular Hybrid Design, Synthesis, In Vitro Cytotoxicity, In Silico ADME and Molecular Docking Studies of New Benzoate Ester-Linked Arylsulfonyl Hydrazones
作者:Erdem Ergan、Reşit Çakmak、Eyüp Başaran、Suraj N. Mali、Senem Akkoc、Sivakumar Annadurai
DOI:10.3390/molecules29153478
日期:——
μM for the A549 cell line and 27.70–170.30 μM for the MCF-7cell line. Among these compounds, compound 15 (IC50 = 29.59 μM against A549 cell line and IC50 = 27.70 μM againstMCF-7cell line) showed the highest cytotoxic activityagainst these two cancer cell lines compared to the reference drug cisplatin (IC50 = 22.42 μM against A549 cell line and IC50 = 18.01 μM againstMCF-7cell line). From docking