Ultrasound-promoted synthesis of novel 2-chloroquinolin-4-pyrimidine carboxylate derivatives as potential antibacterial agents
作者:G. L. Balaji、K. Rajesh、Shabana Kouser Ali、V. Vijayakumar
DOI:10.1007/s11164-012-0715-6
日期:2013.4
Ultrasound-promoted reaction of substituted 2,4-dichloroquinolines (1) with ethyl 4-(3-hydroxyphenyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate (2) in the presence of K2CO3 as mild base at moderate temperatures leads to 2-chloroquinolin-4-pyrimidine carboxylate derivatives (3) with high regioselectivity. All the compounds synthesized were characterized by use of spectral data and screened for their antibacterial activity against two Gram-positive (Staphylococcus aureus, Bacillus cereus) and two Gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacteria. Activity was moderate.
取代的 2,4-二氯喹啉(1)与 4-(3-羟基苯基)-6-甲基-2-氧代-1,2,3,4-四氢嘧啶-5-羧酸乙酯(2)在以 K2CO3 为弱碱的存在下于中等温度下发生超声促进反应,生成了具有高区域选择性的 2-氯喹啉-4-嘧啶羧酸酯衍生物(3)。利用光谱数据对合成的所有化合物进行了表征,并筛选了它们对两种革兰氏阳性菌(金黄色葡萄球菌和蜡样芽孢杆菌)和两种革兰氏阴性菌(大肠杆菌和绿脓杆菌)的抗菌活性。活性适中。