Synthesis of 6-fluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid derivatives as potential antimicrobial agents
作者:Natesh Rameshkumar、Mohan Ashokkumar、Ekambaram Harihara Subramanian、Raju Ilavarasan、Seshaiah Krishnan Sridhar
DOI:10.1016/s0223-5234(03)00151-x
日期:2003.11
antibacterial activity (ED50) against E. coli was 50-160 mg kg(-1) in the order of 7<9<8<10. 1-ethyl-6-fluoro-7-(2,5-dioxo-piperazin-1-yl)1,4-dihydro-4-oxo-quinoline-3-carboxylic acid (7) was found to exhibit the most potent in vitro antimicrobial activity with MIC of 4.1, 3.1, 3.1, 2.4, 1, 1, 25 and >100 microg mL(-1) against Staphylococcus aureus, Staphylococcus epidermidis, Micrococcus luteus, Bacillus cereus
在本研究中,合成了一系列的1-乙基/苄基-6-氟-7-(取代的哌嗪-1-基)1,4-二氢-4-氧代喹啉-3-羧酸,并通过红外光谱对其进行了表征。 ,1 H-NMR,质谱和元素分析。通过纸盘扩散法评估了化合物的体外抗菌和抗真菌活性。还通过琼脂条纹稀释法确定化合物的最小抑制浓度(MIC)。还通过小鼠保护试验评估了化合物对大肠杆菌的体内抗菌活性。所有化合物均显示出显着的抗菌和弱真菌活性。体内对大肠杆菌的抗菌活性(ED50)为50-160 mg kg(-1),顺序为7 <9 <8 <10。1-乙基-6-氟-7-(2,5-二氧-哌嗪-1-基)1,