作者:Rajiv Dahiya
DOI:10.3797/scipharm.0803-04
日期:——
A novel series of 3,5-diiodo-4-(2-methyl-1H-imidazol-5-yl)benzoic acid analogs of amino acids, dipeptides and tripeptides was synthesized by using dicyclohexylcarbodiimide and diisopropylcarbodiimide (DCC/DIPC) as coupling agents and triethylamine (TEA) as base. Structures of all the newly synthesized compounds were confirmed by elemental analysis and IR, 1H NMR, 13C NMR and mass spectral data. Imidazolopeptides were investigated for their antimicrobial activity and some of newly synthesized compounds 2c, 2d, 2h and their hydrolyzed analogs 3b, 3d exhibited potent bioactivity against pathogenic fungi Candida albicans and dermatophytes Trichophyton mentagrophytes and Microsporum audouinii with MIC values of 12.5-6 μg/ml, as compared to the reference drug - griseofulvin. In addition, moderate activity against gram negative bacteria Pseudomonas aeruginosa and Klebsiella pneumoniae was also observed for synthesized imidazolopeptides.
通过使用二环己基碳二亚胺和二异丙基碳二亚胺(DCC/DIPC)作为偶联剂以及三乙胺(TEA)作为碱,合成了一系列新颖的3,5-二碘-4-(2-甲基-1H-咪唑-5-基)苯甲酸氨基酸、二肽和三肽类似物。所有新合成化合物的结构通过元素分析和红外、1H核磁共振、13C核磁共振及质谱数据得到确认。研究了这些咪唑肽的抗菌活性,其中一些新合成的化合物2c、2d、2h及其水解类似物3b、3d显示出对致病真菌白色念珠菌和皮肤癣菌毛癣菌、奥杜安小孢子菌具有强大的生物活性,其最低抑制浓度(MIC)值为12.5-6 μg/ml,相较于参考药物灰黄霉素。此外,合成的咪唑肽还表现出对革兰氏阴性细菌铜绿假单胞菌和肺炎克雷伯菌的中等活性。