作者:V. Krishnakumar、Fazlur-Rahman Nawaz Khan、Badal Kumar Mandal、Sukanya Mitta、Ramu Dhasamandha、Vindhya Nanu Govindan
DOI:10.1007/s11164-012-0505-1
日期:2012.10
The ethyl-2-chloroquinoline-3-carboxylates, 4, were achieved from o-aminobenzophenones in two steps. i.e. initially, the ethyl-2-oxoquinoline-3-carboxylates, 3, were obtained by base-catalyzed Friedlander condensations of o-aminobenzophenones, 1, and diethylmalonate, 2. The 2-chloroquinoline-3-carboxylates, 4, were then obtained by the reaction with POCl3 in good yields. The chemical structures were confirmed by FTIR, mass and 1H-NMR spectroscopic techniques. All the synthesized compounds were tested for their in vitro antibacterial activity against Bacillus subtilis and Vibrio cholera and found to possess moderate activity.
邻氨基二苯甲酮通过两个步骤获得 2-氯喹啉-3-羧酸乙酯 4,即首先通过邻氨基二苯甲酮 1 和二乙基丙二酸二酯在碱催化下的弗里德兰德缩合反应获得 2-氧代喹啉-3-羧酸乙酯 3,然后通过与 POCl3 反应以良好的产率获得 2-氯喹啉-3-羧酸乙酯 4。傅立叶变换红外光谱、质谱和 1H-NMR 光谱技术证实了这些化合物的化学结构。对所有合成化合物进行了体外抗菌测试,发现它们对枯草杆菌和霍乱弧菌具有中等程度的抗菌活性。