Potent Antibacterial Agents: N-Substituted Derivatives of N-(4-Methylpyridin-2-yl)benzenesulfonamide
作者:Aziz-ur-Rehman、Muhammad Arfan、M. Athar Abbasi、Majid Nazir、Shahid Rasool、Samreen Gul、Irshad Ahmad、Saira Afzal
DOI:10.14233/ajchem.2014.16161
日期:——
In the present work, a new series of N-substituted-N-(4-methylpyridin-2-yl)benzenesulfonamides (5a-f), was synthesized and evaluated for antibacterial activity. The synthesis was carried out by the coupling of 2-amino-4-methylpyridine (1) with benzenesulfonyl chloride (2) yielded N-(4-methylpyridin-2-yl)benzenesulfonamide (3) under dynamic pH control of basic aqueous medium of sodium carbonate. Further, the molecule 3 was reacted with different alkyl/aralkyl halides, 4a-f, yielded the products 5a-f, in the presence of N,N-dimethyl formamide and LiH. The proposed structures of synthesized molecules were corroborated by IR, 1H NMR and EI-MS spectral data and also screened for antibacterial activity. All the compounds exhibited moderately good inhibitors and only compound 5e executed no activity against P. aeroginosa, gram-negative bacterial strain.
在本研究中,合成了一系列新的N-取代-N-(4-甲基吡啶-2-基)苯磺酰胺(5a-f),并评估其抗菌活性。合成过程通过在动态pH控制下将2-氨基-4-甲基吡啶(1)与苯磺酰氯(2)偶联,得到N-(4-甲基吡啶-2-基)苯磺酰胺(3),在碳酸钠的碱性水相中进行。随后,分子3与不同的烷基/芳香烷基卤化物4a-f反应,在N,N-二甲基甲酰胺和氢化锂的存在下,产生了产物5a-f。合成分子的拟定结构通过红外光谱、^1H NMR和EI-MS谱数据得到了证实,并进行了抗菌活性筛选。所有化合物均显示出中等良好的抑制作用,仅化合物5e对革兰阴性细菌菌株铜绿假单胞菌(P. aeruginosa)未表现出活性。