Synthesis, Characterization and Antibacterial Study of 7-O-Substituted Derivatives of Chlorinated Coumarin
作者:Shahid Rasool、Aziz-ur-Rehman、Muhammad Athar Abbasi、Khadija Nafeesa、Asia Siddiqa、Ghulam Hussain、Irshad Ahmad、Shafia Arshad
DOI:10.14233/ajchem.2014.15480
日期:——
In this research work, a series of 7-O-alkyl/aralkyl/acyl substituted derivatives of chlorinated coumarin was synthesized and screened for their antibacterial activity. The parent compound 6-chloro-7-hydroxy-4-methyl-2H-chromen-2-one (3) was prepared by the coupling of homogeneous mixing of 4-chlororesorcinol (1) and ethylacetoacetate (2) in a conc. H2SO4 medium. Further, the 7-O-substituted derivatives of coumarins 5a-i and 7a-h were prepared by the reaction of parent compound with different alkyl/aralkyl/acyl halides 4a-i and 6a-h. The synthesized compounds were supported via spectral data. The prepared compounds were evaluated for inhibition activity against bacterial strains including Gram-positive and Gram-negative and were observed that some of the compounds exhibited activity to varying degree.
在这项研究工作中,合成了一系列 7-O-烷基/芳基/酰基取代的氯化香豆素衍生物,并对其抗菌活性进行了筛选。母体化合物 6-氯-7-羟基-4-甲基-2H-香豆素-2-酮(3)是由 4-氯间苯二酚(1)和乙酰乙酸乙酯(2)在浓 H2SO4 介质中均匀混合偶联制备的。此外,香豆素 5a-i 和 7a-h 的 7-O 取代衍生物是由母体化合物与不同的烷基/芳基/酰基卤化物 4a-i 和 6a-h 反应制备的。合成的化合物得到了光谱数据的支持。对所制备的化合物进行了抑制细菌菌株(包括革兰氏阳性菌和革兰氏阴性菌)活性的评估,发现其中一些化合物具有不同程度的活性。