In this study, a series of benzimidazoles bearing thiosemicarbazide chain or triazole and thiadiazole rings were designed and synthesized. Crystal and molecular structure of the compound 5c has been characterized by single crystal X-ray crystallographic analysis. EGFR kinase inhibitory potencies of synthesized compounds were compared with erlotinib in vitro and most of the compounds exhibited significant activities. Cell culture studies were also carried out for selected compounds and 12b was found to be the most active compound. To understand the binding mode of synthesized benzimidazoles, three compounds (12b, 16, 16c) were selected and placed on the binding site of EGFR tyrosine kinase based on their kinase inhibitor potencies and cell culture studies. Docking study indicated that compound 12b showed two-hydrogen bonding interactions with residues of LYS721 and THR830 at the binding pocket.

在这项研究中，设计并合成了一系列带有硫代氨基脲链或三唑和噻二唑环的苯并咪唑。化合物5c的晶体和分子结构已经通过单晶X射线晶体学分析表征。将合成化合物的EGFR激酶抑制能力与厄洛替尼进行了体外比较，大多数化合物表现出显着的活性。还对选定的化合物进行了细胞培养研究，发现12b是活性最高的化合物。要了解合成的苯并咪唑的结合方式，需要三种化合物（12b，16、16c根据它们的激酶抑制剂效能和细胞培养研究，选择）并将其置于EGFR酪氨酸激酶的结合位点。对接研究表明，化合物12b与结合口袋处的LYS721和THR830残基显示出两个氢键的相互作用。