Diastereoselective synthesis of pyrrolo[1, 2‐c]imidazoles using chiral thiohydantoins, malononitrile, and aldehydes and evaluation of their antioxidant and antibacterial activities
作者:Khadijeh Mollanejad、Sakineh Asghari、Khosrow Jadidi
DOI:10.1002/jhet.3762
日期:2020.2
Diastereoselective synthesis of pyrrolo[1,2‐c]imidazoles is reported from three‐component reaction of chiral thiohydantoins, aldehydes, and malononitrile in the presence of NEt3. The antioxidant properties of the obtained products were evaluated by 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) radical scavenging assay. Among the products, compound 4l possessing NH2 and NH groups and bromine atom at 4‐position
据报道,在NEt 3存在下,手性硫代乙内酰脲,醛类和丙二腈的三组分反应可实现对吡咯并[1,2-c]咪唑的非对映选择性合成。通过1,1-二苯基-2-吡啶并肼基(DPPH)自由基清除试验评估了所得产品的抗氧化性能。在这些产品中,具有NH 2和NH基团的化合物4l和芳环4位的溴原子表现出最高的抗氧化活性(90%)。此外,使用圆盘扩散法探索了它们对革兰氏阳性和革兰氏阴性细菌的抗菌活性。在合成的化合物中,4a 芳环对位的氯原子和7位的甲基(最小的烷基)对被测革兰氏阳性菌表现出最佳的抗菌活性。