Synthesis, characterization, COX1/2 inhibition and molecular modeling studies on novel 2-thio-diarylimidazoles
作者:Şahin, Zafer、Bender, Ceysu、Berk, Barkın、Biltekin Kaleli, Sevde Nur、Demirayak, Şeref、Koçoğlu Kalkan, Melike、Yurttaş, Leyla
DOI:10.3906/kim-2104-54
日期:——
Heterocyclic compounds with diaryl substituents have been a milestone approach for selective cyclooxygenase 2 (COX 2) inhibition by bioisosteric replacements and modifications. It is also known that thiazole derivatives have different pharmacological activities. In this study, nine novel 2-[(1,5-diphenyl-1H-imidazole-2-yl)thio]-N-(thiazole-2-yl)acetamide derivatives (Compound 1-9) were synthesized via the reaction of 1,5-disubstitued phenyl-imidazole-2-thiole and N-thiazole acetamide. The inhibitory effects of COX-1 and COX-2 enzymes were tested for the synthesized compounds. Enzyme-ligand interactions of the most active compound on COX subtypes were elucidated by molecular modeling studies. The percent inhibitory effect for compound 1, which is the naked derivative among all the compounds, was found to be the most active on COX-2 at 10 μM concentration (C1cox-2: 88%, SC-560cox-2: 98.2%, C1cox-1: 60.9%); whereas compound 9 showed the highest inhibitory effect and was found to be the most selective derivative on COX-1 isoenzyme (C9cox-1: 85%, DuP-697cox-1: 97.2%, C9cox-2: 57.9%)
具有二芳基取代基的杂环化合物已成为通过生物电子等排替换和修饰选择性抑制环氧合酶 2 (COX 2) 的里程碑式方法。还已知噻唑衍生物具有不同的药理活性。在本研究中,通过以下反应合成了九种新型2-[(1,5-二苯基-1H-咪唑-2-基)硫代]-N-(噻唑-2-基)乙酰胺衍生物(化合物1-9) 1,5-二取代的苯基-咪唑-2-硫醇和N-噻唑乙酰胺。测试了合成化合物的COX-1和COX-2酶的抑制作用。通过分子模型研究阐明了最活跃的化合物对 COX 亚型的酶-配体相互作用。化合物 1(所有化合物中的裸衍生物)的抑制百分比在 10 μM 浓度下对 COX-2 最具活性(C1cox-2:88%,SC-560cox-2:98.2%, C1cox-1: 60.9%);而化合物9显示出最高的抑制效果,并且被发现是对COX-1同工酶最具选择性的衍生物(C9cox-1:85%,DuP-697cox-1:97.2%,C9cox-2:57.9%)