Synthesis and Spectral Studies of Acetophenone Schiff Bases and Evaluation of their Antimicrobial Activities
作者:Hira Mir、Dildar Ahmed、Hafiz Muhammad Adeel Sharif
DOI:10.14233/ajchem.2013.15146
日期:——
Seven acetophenone derived Schiff bases with different amines were synthesized including, (Z)-2-[(1-phenylethylidene)amino]benzoic acid (HL1), (Z)-4-[(1-phenylethylidene)amino]benzoic acid (HL2), (E)-N-(1-phenylethylidene)naphthalen-2-amine (HL3), (E)-1-phenyl-2-(1-phenylethylidene)hydrazine (HL4), N1,N2-bis(1-phenylethylidene)ethane-1,2-diamine (HL5), N1(Z),N2(Z)-N1,N2-bis(1-phenylethylidene)benzene-1,2-diamine (HL6) and N1,N4-bis(1-phenylethylidene)benzene-1,4-diamine (HL7) and characterized by spectral studies (IR, MS and NMR) and elemental analysis. Their antimicrobial activity was extensively investigated against 20 Gram-negative and 10 Gram-positive bacterial strains. Schiff bases HL1-5 showed good antibacterial activity against almost all bacterial strains. HL3 showed remarkable activity against Enterococcus sp., Citrobacter freundii, Salmonella typhi and Pseudomonas aurantiaca. HL4 gave incredible inhibition against Enterobacter aerogenes. HL7 demonstrated notable activity against Staphylococcus aureus. (E)-N-(1-phenylethylidene)naphthalen-2-amine (HL3) is reported for the first time.
合成了七种由苯乙酮衍生并含有不同胺的希夫碱,包括 (Z)-2-[(1-苯基亚乙基)氨基]苯甲酸 (HL1)、(Z)-4-[(1-苯基亚乙基)氨基]苯甲酸 (HL2)、(E)-N-(1-苯基亚乙基)萘-2-胺 (HL3)、(E)-1-苯基-2-(1-苯基亚乙基)肼 (HL4)、N1,N2-双(1-苯基亚乙基)乙烷-1,2-二胺(HL5)、N1(Z),N2(Z)-N1,N2-双(1-苯基亚乙基)苯-1,2-二胺(HL6)和 N1,N4-双(1-苯基亚乙基)苯-1,4-二胺(HL7),并通过光谱研究(红外光谱、质谱和核磁共振)和元素分析进行了表征。研究人员广泛考察了它们对 20 种革兰氏阴性和 10 种革兰氏阳性细菌菌株的抗菌活性。希夫碱 HL1-5 对几乎所有细菌菌株都表现出了良好的抗菌活性。HL3 对肠球菌、自由柠檬酸杆菌、伤寒沙门氏菌和绿脓杆菌具有显著的活性。HL4 对产气肠杆菌有惊人的抑制作用。HL7 对金黄色葡萄球菌具有显著的活性。(E)-N-(1-phenylethidene)naphthalen-2-amine (HL3) 是首次报道。