Synthesis of novel ethyl 1-ethyl-6-fluoro-7-(fatty amido)-1,4-dihydro-4-oxoquinoline-3-carboxylate derivatives and their biological evaluation
作者:Vijayendar Venepally、R.B.N. Prasad、Y. Poornachandra、C. Ganesh Kumar、Ram Chandra Reddy Jala
DOI:10.1016/j.bmcl.2015.11.063
日期:2016.1
4-dihydro-4-oxoquinoline-3-carboxylate derivatives were prepared through multistep synthesis. The key step in the synthesis was to obtain the C-7 fatty amide derivative. The azide was selectively formed at C-7 position using sodium azide at 60 °C. Subsequently, the azide was reduced under mild conditions using zinc and ammonium chloride to form the corresponding amine. The synthesized derivatives were further subjected
通过多步合成制备了一系列新型的1-乙基-6-氟-7-(脂肪酰胺基)-1,4-二氢-4-氧代喹啉-3-羧酸乙酯衍生物。合成中的关键步骤是获得C-7脂肪酰胺衍生物。在60°C使用叠氮化钠在C-7位置选择性地形成叠氮化物。随后,在温和条件下使用锌和氯化铵将叠氮化物还原以形成相应的胺。对合成的衍生物进一步进行生物学评估研究,例如对一系列癌细胞系(例如DU145,A549,SKOV3,MCF7和正常肺细胞)的细胞毒性,IMR-90以及具有抗微生物和抗氧化活性。观察到带有己酸(8a),辛酸(8b),月桂酸(8a)的羧基化喹诺酮衍生物。8d)和肉豆蔻酸(8e)部分对所有测试的癌细胞系显示出有希望的细胞毒性。结果还表明,基于己酸的脂肪酰胺羧化喹诺酮衍生物(8a)对细菌和真菌菌株均显示出有希望的活性,并且观察到对金黄色葡萄球菌MTCC 96的显着抗菌活性(MIC值为3.9μg/ mL)。化合物8a还显示出优异的抗金黄色葡萄球菌MTCC