PEG-mediated catalyst-free expeditious synthesis of 2-substituted benzimidazoles and bis-benzimidazoles under solvent-less conditions
作者:Chhanda Mukhopadhyay、Pradip Kumar Tapaswi
DOI:10.1016/j.tetlet.2008.08.041
日期:2008.10
A wide variety of 2-substituted benzimidazoles and bis-benzimidazoles were synthesized in high yields by PEG-mediated catalyst-free synthesis under solvent-less conditions. The products were directly recrystallized from hot methanol. The reaction occurred giving excellent yields with low as well as high molecular weight PEGs.
In order to explore and develop new anticancer agents, three series of 2-phenylbenzimidazoles, 15–46, were condensed under simple and mild conditions using sodium metabisulfite as an oxidation agent and another series, 47–55, were obtained via a reduction reaction using sodium borohydride. All the compounds synthesized were evaluated for their in vitro anticancer activities against three human cancer
为了探索和开发新型抗癌药物,利用焦亚硫酸钠作为氧化剂,在简单温和的条件下缩合了三个系列的2-苯基苯并咪唑15-46 ,并通过使用还原剂进行还原反应得到了另一个系列47-55 。硼氢化钠。评估了所有合成的化合物对三种人类癌细胞系的体外抗癌活性。新型化合物38被发现是针对A549、MDA-MB-231和PC3细胞系最有效的多癌症抑制剂(IC 50值分别为4.47、4.68和5.50 μg mL -1 )。此外,化合物40对MDA-MB-231细胞系表现出最佳IC 50值,为3.55 μg mL -1 。结果表明,向化合物37-55引入新的取代基可以提高其抗增殖活性。