一系列新颖的钌(II)配合物-cymene(1 - 8)含有取代的吡啶基噻唑配体,的[Ru(η 6 - p -cymene)(L)CL] CL(L = N,N-螯合衍生物),已经使用元素分析,红外,1 H NMR和13 C NMR光谱法和质谱法对这些化合物进行了合成和表征。所有这些复合物不仅在体外显示出明显的细胞毒性对三种不同的人类癌细胞系(HeLa,A549和MDA-MB-231)具有抗性,但在亚细胞毒性浓度下也显示出有希望的抗转移活性。细胞周期分析表明,钌(II)复合物诱导的生长抑制主要是由S期细胞周期停滞引起的。进一步的蛋白质水平分析表明,化合物5可能通过p53独立机制发挥抗肿瘤活性。
Structure–activity relationships of 2-aminothiazoles effective against Mycobacterium tuberculosis
摘要:
A series of 2-aminothiazoles was synthesized based on a HTS scaffold from a whole-cell screen against Mycobacterium tuberculosis (Mtb). The SAR shows the central thiazole moiety and the 2-pyridyl moiety at C-4 of the thiazole are intolerant to modification. However, the N-2 position of the aminothiazole exhibits high flexibility and we successfully improved the antitubercular activity of the initial hit by more than 128-fold through introduction of substituted benzoyl groups at this position. N-(3-Chlorobenzoyl)-4-(2-pyridinyl)-1,3-thiazol-2-amine (55) emerged as one of the most promising analogues with a MIC of 0.024 mu M or 0.008 mu g/mL in 7H9 media and therapeutic index of nearly similar to 300. However, 55 is rapidly metabolized by human liver microsomes (t(1/2) = 28 min) with metabolism occurring at the invariant aminothiazole moiety and Mtb develops spontaneous low-level resistance with a frequency of similar to 10 (5). (C) 2013 Elsevier Ltd. All rights reserved.
Thiazole and Thiadiazole Analogues as a Novel Class of Adenosine Receptor Antagonists
作者:Jacqueline E. van Muijlwijk-Koezen、Hendrik Timmerman、Roeland C. Vollinga、Jacobien Frijtag von Drabbe Künzel、Miriam de Groote、Sven Visser、Adriaan P. IJzerman
DOI:10.1021/jm0003945
日期:2001.3.1
on a template approach. Structure-affinityrelationships revealed insights for extended knowledge of the receptor-ligand interaction. We replaced the bicyclic heterocyclic ring system of earlier described isoquinoline and quinazoline adenosine A(3) receptor ligands by several monocyclic rings and investigated the influence thereof on adenosine receptor affinity. The thiazole or thiadiazole derivatives