Synthesis and characterization of two new 2,5-bis-cycloalkylsulfanyl-[1,3,4]thiadiazoles and study of the crystal structure, thermal behavior, and biological activities compared with bismuthiol
作者:Nurul Fatimah Abdul Basir、Hayedeh Gorjian、Mohd Rafie Johan、Nader Ghaffari Khaligh
DOI:10.1016/j.molstruc.2023.135087
日期:2023.6
Two new derivatives of 2,5-bis-cycloalkylsulfanyl-[1,3,4]thiadiazoles, i.e., 2,5-bis-cyclopentylsulfanyl-[1,3,4]thiadiazole and 2,5-bis-cyclohexylsulfanyl-[1,3,4]thiadiazole, were synthesized for a first time through a one-pot two-step procedure through the nucleophilic substitution of the potassium salt of 1,3,4-thiadiazole-2,5-dithiolate with chlorocyclopentane or bromocyclohexane in ethanol under
2,5-双环烷基硫基-[1,3,4]噻二唑的两种新衍生物,即2,5-双环戊基硫基-[1,3,4]噻二唑和2,5-双环己基硫基-[1 ,3,4]噻二唑,首次通过一锅两步法合成,通过在乙醇中用氯代环戊烷或溴代环己烷亲核取代1,3,4-噻二唑-2,5-二硫醇的钾盐在回流条件下。应用具有成本效益的后处理来分离和纯化所需产物。产品的特点是物理和光谱技术。得到2,5-双环己硫基-[1,3,4]噻二唑无色长针状晶体,并通过单晶X射线衍射分析研究了其晶体结构。通过 TGA/DTG 和 DSC 研究了铋硫醇和两种新型双环烷基铋醇的转变相和热稳定性。文献报道了铋硫醇的热分解;在此,首次对其热行为进行了详细分析。最后,通过圆片筛选了双硫醇和两种新的双环戊硫基和双环己硫基取代的双硫醇衍生物对革兰氏阴性菌(大肠杆菌 ATCC 25922)和革兰氏阳性菌(金黄色葡萄球菌 ATCC 25923)的生物活性扩散法。