A simple, green, efficient and economical procedure for the synthesis of, 2-amino-6-(4-hydroxy-2-oxo-chromen-3-yl)-4-(aryl) nicotine nitrile (4a-g) by two routes carried in same conditions, have been reported. The new compounds 4a-g were characterized by 1H NMR, 13C NMR, FT-IR and elemental analysis. The synthesized compounds were screened for their antibacterial activities against Gram-positive bacterial strains (Micrococcus luteus LB14110, Staphylococcus aureus ATCC 6538, Listeria monocytogenes ATCC 19117), Gram-negative bacteria (Escherichia coli, Salmonella typhimurium ATCC 14028 and Pseudomonas aeruginosa). The coumarin derivative 4a and 3-acetyl-4-hydroxycouamrin (1) were the most active against two bacteria Staphylococcus aureus ATCC 6538 and Candida albicans respectively. The best minimum inhibitory concentration values were obtained for the compound 4a against Candida albicans (0.0195 g/cm3). In addition, compounds 4a-g were investigated for their antioxidant activities by DPPH (2,2-diphenyl-1-picrylhydrazyl) in which most of them displayed significant antioxidant activities.
本研究报道了一种简单、绿色、高效和经济的方法,在相同条件下通过两种路线合成 2-
氨基-6-(
4-羟基-2-
氧代-3-
苯并
吡喃基)-4-(芳基)
烟腈(4a-g)。新化合物 4a-g 通过 1H NMR、13C NMR、傅立叶变换红外光谱和元素分析进行了表征。对合成的化合物进行了筛选,以检测它们对革兰氏阳性细菌菌株(黄体微球菌 LB14110、
金黄色葡萄球菌 A
TCC 6538、单核细胞增生李斯特菌 A
TCC 19117)和革兰氏阴性细菌(大肠杆菌、伤寒沙门氏菌 A
TCC 14028 和绿脓杆菌)的抗菌活性。
香豆素衍
生物 4a 和 3-acetyl-4-hydroxycouamrin (1) 分别对两种细菌
金黄色葡萄球菌 A
TCC 6538 和白色念珠菌最有效。化合物 4a 对白色念珠菌的最小抑菌浓度值(0.0195 克/立方厘米)最佳。此外,还用
DPPH(
2,2-二苯基-1-苦基
肼)对化合物 4a-g 的抗
氧化活性进行了研究,结果表明大多数化合物都具有显著的抗
氧化活性。