Synthesis, Characterization and Biological Screening of N-Substituted (5-Chloro-2-methoxyphenyl)benzene Sulfonamide
作者:Aziz-ur-Rehman、Ambreen Fatima、Muhammad Athar Abbasi、Khalid Mohammed Khan、Muhammad Ashraf、Irshad Ahmad、Syeda Abida Ejaz
DOI:10.14233/ajchem.2013.13735
日期:——
In the present study, a series of N-substituted (5-chloro-2-methoxyphenyl)benzene sulfonamide have been synthesized. The reaction of benzene sulfonyl chloride (1) with 2-amino-4-chloroanisole (2) yielded N-(5-chloro-2-methoxyphenyl)benzene sulfonamide (3). Finally the target compounds (5a-k) were obtained by stirring N-(5-chloro-2-methoxyphenyl)benzene sulfonamide with different electrophiles (4a-k) in the presence of N,N-dimethyl formamide and sodium hydride. The structures of the synthesized compounds were established by spectroscopic techniques like 1H NMR and EI-MS. These compounds were assayed for their antioxidant activities by using 2,2-diphenyl-1-picrylhydrazil (DPPH) scavenging and other biological activities via screening them against acetylcholinesterase, butyrylcholinesterase and lipoxygenase enzymes, however, these showed prominent activity against acetylcholinesterase enzyme. It is clearly evident from the results that the compounds N-methyl-(5-chloro-2-methoxyphenyl)benzene sulfonamide (5a), N-allyl-N-(5-chloro-2-methoxyphenyl)benzene sulfonamide (5e) and N-2"-phenylethyl-N-(5-chloro-2-methoxyphenyl)benzene sulfonamide (5j) were found to be promising inhibitors against acetylcholinesterase enzyme having IC50 value of 34.61 ± 0.62, 40.21 ± 0.25 and 45.11 ± 0.22 μmol/L, respectively, relative to Eserine, a reference standard with IC50 value of 0.04 ± 0.001 μmol/L.
在本研究中,合成了一系列N取代的(5-氯-2-甲氧基苯基)苯磺酰胺。苯磺酰氯(1)与2-氨基-4-氯乙醚(2)的反应生成了N-(5-氯-2-甲氧基苯基)苯磺酰胺(3)。最后,通过在N,N-二甲基甲酰胺和氢化钠存在下,搅拌N-(5-氯-2-甲氧基苯基)苯磺酰胺与不同的电亲核体(4a-k),获得了目标化合物(5a-k)。合成化合物的结构通过1H核磁共振(NMR)和电子离子化质谱(EI-MS)等光谱技术进行了确认。这些化合物通过2,2-二苯基-1-吡咯基氮烷(DPPH)清除实验及针对乙酰胆碱酯酶、丁酰胆碱酯酶和脂氧合酶的筛选测试评估了其抗氧化活性,但主要表现出对乙酰胆碱酯酶的显著活性。结果明显表明,N-甲基-(5-氯-2-甲氧基苯基)苯磺酰胺(5a)、N-丙烯基-N-(5-氯-2-甲氧基苯基)苯磺酰胺(5e)和N-2"-苯乙基-N-(5-氯-2-甲氧基苯基)苯磺酰胺(5j)被发现是对乙酰胆碱酯酶的有前景的抑制剂,其IC50值分别为34.61 ± 0.62、40.21 ± 0.25和45.11 ± 0.22 μmol/L,相较于参考标准Eserine的IC50值为0.04 ± 0.001 μmol/L。