Inhibitors of histone deacetylases (HDAC) are currently developed for the treatment of cancer. These include compounds with a sulfur containing head group like depsipeptide, alkylthiols, thiocarboxylates, and trithiocarbonates with a carbonyl group in the alpha-position. In the present investigation, we report on the synthesis and comprehensive SAR analysis of HDACinhibitors bearing a tri- or dithiocarbonate
目前已开发出组蛋白脱乙酰基酶(HDAC)抑制剂来治疗癌症。这些包括具有含硫头基的化合物,例如二肽,烷基硫醇,硫代羧酸盐和在α位具有羰基的三硫代碳酸酯。在本研究中,我们报告了带有三硫代或二硫代碳酸酯基序的HDAC抑制剂的合成和综合SAR分析。这样的三硫代碳酸酯可容易地从预制的或原位制备的α-卤代甲基芳基酮获得。显示了已定义类似物的HDAC同种型选择性和底物竞争作用模式。对头基的探索表明,有效抑制HDAC的必要条件是使用二硫代α-羰基基序。确定了高效,底物竞争性HDAC6选择性抑制剂(12ac:IC 50 = 65 nM,K i = 110 nM)。具有氨基喹啉取代的吡啶基-硫代乙酰基帽的三硫代碳酸酯类似物显示出与作为批准的抗癌药物的亚磺酰苯胺异羟肟酸(SAHA)相当的细胞毒性谱和效能。
Synthesis and biological evaluation of new tetramethylpyrazine-based chalcone derivatives as potential anti-Alzheimer agents
作者:Meng Wang、Hua-Li Qin、Jing Leng、Ameeduzzafar、Muhammad Wahab Amjad、Maria Abdul Ghafoor Raja、Muhammad Ajaz Hussain、Syed Nasir Abbas Bukhari
DOI:10.1111/cbdd.13355
日期:2018.11
In the current study, a series of new ligustrazine‐based chalcones was synthesized. For insertion of tetramethylpyrazine (TMP, also designated as ligustrazine) in chemical backbone of chalcone, a new ligustrazine‐based aldehyde was prepared. New ketones were synthesized for inclusion of quinazolin‐4‐yl amino and pyrazin‐2‐yl amino moieties. The newly synthesized compounds were screened for acetylcholinesterase
Based on the structure of natural product chalone, a series of novel phosphonatederivatives were designed and synthesized through 1,4‐hydrophosphinylation of α,β‐unsaturated carbonyl compounds. Their structures were characterized by IR, NMR, MS, and elemental analysis. The antiviral activities against cucumber mosaic virus were evaluated for the first time. The bioassay results indicated that most
During the last decade it has been found that chalcones and quinazolines are promising inhibitors of ABCG2. The combination of these two scaffolds offers a new class of heterocyclic compounds with potentially high inhibitory activity against ABCG2. For this purpose we investigated 22 different heterodimeric derivatives. In this series only methoxy groups were used as substituents as these had been proven superior for inhibitory activity of chalcones. All compounds were tested for their inhibitory activity, specificity and cytotoxicity. The most potent ABCG2 inhibitor in this series showed an IC50 value of 0.19 mu M. It possesses low cytotoxicity (GI(50) = 93 mu M), the ability to reverse MDR and is nearly selective toward ABCG2. Most compounds containing dimethoxy groups showed slight activity against ABCB1 too. Among these three compounds (17,19 and 24) showed even higher activity toward ABCB1 than ABCG2. All inhibitors were further screened for their effect on basal ATPase activity. Although the basal ATPase activity was partially stimulated, the compounds were not transported by ABCG2. Thus, quinazoline-chalcones are a new class of effective ABCG2 inhibitors. (C) 2016 Elsevier Masson SAS. All rights reserved.