Synthesis of some new biheterocyclic triazole derivatives and evaluation of their antimicrobial activity
作者:HAKAN BEKTAŞ、AHMET DEMİRBAŞ、NESLİHAN DEMİRBAŞ、ŞENGÜL ALPAY KARAOĞLU
DOI:10.3906/kim-0905-36
日期:——
2-3-(4-Substitutedbenzyl)-4-[2-(1H-indol-3-yl)ethyl]-5-oxo-4,5- dihydro-1H-1,2,4-triazol-1-yl}-N'-(aryl-methylene)acetohydrazides (5a-g), 4-amino-2--(4-substitutedbenzyl)-5-oxo-4,5-dihydro-1H-1,2,4-triazol- 1-yl}-N'-(arylmethylene)acetohydrazides (6a,b), and 4-[2-(1H-indol- 3-yl)ethyl]-5-(4-substitutedbenzyl)-2-5-(phenylamino)-1,3,4-thiadiazol- 2-yl]methyl}-2,4-dihydro-3H-1,2,4-triazol-3-ones (8a,b) were synthesized starting from 4-alkyl-5-(4-substitutedbenzyl)-2,4-dihydro- 3H-1,2,4-triazol-3-ones (2a-c) by several steps and their structures were well characterized by elemental analyses, IR, ^1H-NMR, ^13}C-NMR, and mass spectral studies. They were also screened for their microbial activities. The obtained antimicrobial activity results revealed that 12 among the 24 compounds tested displayed variable growth inhibition effects on the tested gram-positive and gram-negative bacterial strains. None of the compounds showed antifungal activity against yeast-like fungi.
2-3-(4-Substitutedbenzyl)-4-[2-(1H-indol-3-yl)ethyl]-5-oxo-4,5- dihydro-1H-1,2,4-triazol-1-yl}-N'-(aryl-methylene)acetohydrazides (5a-g), 4-amino-2--(4-substitutedbenzyl)-5-oxo-4,5-二氢-1H-1,2,4-三唑-1-基}-N'-(芳基亚甲基)乙酰肼 (6a,b),以及 4-[2-(1H-吲哚-3-基)乙基]-5-(4-取代苄基)-2-5-(苯基氨基)-1、4-烷基-5-(4-取代苄基)-2,4-二氢-3H-1,2,4-三唑-3-酮(2a-c)为起点,经多个步骤合成了 2,4-二氢-3H-1,2,4-三唑-3-酮(8a,b),并通过元素分析、红外光谱、^1H-NMR、^13}C-NMR 和质谱研究对其结构进行了表征。 此外,还对它们进行了微生物活性筛选。 所获得的抗菌活性结果显示,24 种受测化合物中有 12 种对受测的革兰氏阳性和革兰氏阴性细菌菌株具有不同的生长抑制作用。 没有一种化合物显示出对酵母类真菌的抗真菌活性。