Synthesis, in vitro Antimicrobial and Anticancer Evaluation of Some New Pyridazines and Polyfunctionally Substituted Heterocyclic Compounds
作者:F.M.A. Altalbawy
DOI:10.14233/ajchem.2015.19123
日期:——
This study aimed for the synthesis of new heterocyclic compounds incorporating sulfamoyl moiety suitable for use as antimicrobial agents via versatile and readily accessible N-[4-(aminosulfonyl)phenyl]-3-oxobutanamide (1). Butanamide coupled with arenediazonium salts to afford hydrazones. The latter reacts with dimethylformamide dimethyl acetal (DMF-DMA) to afford the substituted 1,4-dihydropyridazine. Several new thiophene, pyridine, nicotinamide and pyrazole derivatives have been synthesized by the reactions of butanamide with malononitrile and elemental sulfur, 1,3-diphenylpropenone, arylidenecyanothioacetamide, nitrogen nucleophiles, respectively. Refluxing of butanamide with a mixture of p-methoxybenzaldehyde and thiourea afforded 4-(4-methoxyphenyl)-6-methyl-N-(4-sulfamoylphenyl)-2-thioxo-1,2-dihydropyrimidine-5-carboxamide which heated with chloroacetyl chloride give N-[4-(aminosulfonyl)phenyl]-7-methyl-5-(4-methoxyphenyl)-3-oxo-2,3-dihydro-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxamide. Treatment of butanamide with phenyl isothiocyanate afforded the intermediate salt which reacted in situ with 2-bromo-1-phenylethanone to afford N-[4-(aminosulfonyl)phenyl]-2-(3,4-diphenyl-3H-thiazol-2-ylidene)-3-oxobutanamide. Some of the selected products were evaluated for both their in vitro antibacterial and antifungal activities and showed promising results. In addition, the anticancer activity of some selected products against human liver (HEPG2) cell line was determined and the results revealed high activities of compounds 5a, 6 and 14.
本研究旨在通过用途广泛且易于获得的 N-[4-(氨基磺酰基)苯基]-3-氧代丁酰胺(1),合成含有适合用作抗菌剂的氨基磺酰基的新杂环化合物。丁酰胺与腙盐偶联生成酰肼。后者与二甲基甲酰胺二甲基缩醛(DMF-DMA)反应,生成取代的 1,4-二氢哒嗪。丁酰胺分别与丙二腈和元素硫、1,3-二苯基丙烯酮、亚芳基氰基硫代乙酰胺、氮亲核剂反应,合成了几种新的噻吩、吡啶、烟酰胺和吡唑衍生物。丁酰胺与对甲氧基苯甲醛和硫脲的混合物回流,得到 4-(4-甲氧基苯基)-6-甲基-N-(4-氨基磺酰基苯基)-2-硫酮-1、然后与氯乙酰氯加热,得到 N-[4-(氨基磺酰基)苯基]-7-甲基-5-(4-甲氧基苯基)-3-氧代-2,3-二氢-5H-[1,3]噻唑并[3,2-a]嘧啶-6-甲酰胺。丁酰胺与异硫氰酸苯酯处理后得到中间盐,中间盐与 2-溴-1-苯乙酮原位反应,得到 N-[4-(氨基磺酰基)苯基]-2-(3,4-二苯基-3H-噻唑-2-亚基)-3-氧代丁酰胺。对所选的一些产品进行了体外抗菌和抗真菌活性评估,结果表明这些产品具有良好的抗菌和抗真菌活性。此外,还测定了一些选定产品对人类肝脏(HEPG2)细胞系的抗癌活性,结果表明化合物 5a、6 和 14 具有很高的活性。