Synthesis and characterizations of novel thiazolyl-thiadiazole derivatives as telomerase activators
作者:Kayagil, Ismail、Mutlu, Ayşe Gül、Bayhan, Ülkü、Yilmaz, Inanç、Demirayak, Şeref
DOI:10.3906/kim-1711-92
日期:——
Pyridine-3/4-thiocarboxamide derivatives were used as starting materials for the synthesis of the target compounds. The pyridine-3/4-thiocarboxamide derivatives were reacted with ethyl 2-chloroacetoacetate in ethanol to give the thiazole derivatives (1, 2). The two ethyl thiazole-carboxylate derivatives (1, 2) thus obtained were treated with sodium hydroxide solution and ethanol and converted to carboxylic acids (3, 4). The carboxylic acid derivatives (3, 4) were reacted with thiosemicarbazide in phosphoroxy trichloride and aminothiadiazole rings (5, 6) were formed. Thus, two thiazolyl-thiadiazole amine derivatives (5, 6) were obtained. These two derivatives (5, 6) were converted into two chloroacetamidothiadiazole derivatives (7, 8) by reaction with chloroacetylchloride over the amino group in the presence of triethylamine in acetone. After all these steps, the starting materials (7, 8) needed to reach the target compounds were obtained. With the two derivatives (7, 8) obtained in this last step, phenol and thiophenol derivatives were reacted in acetone in the presence of potassium carbonate. The target compounds, thiazolyl-thiadiazole derivatives (TDA$_\mathbf1-16}})$, are completely unique and their structure has been elucidated by elemental analysis, IR, NMR, and MS spectral data. After all these synthesis steps, telomerase activity studies were performed on the target compounds obtained. For this purpose, a PCR ELISA-based TRAP method was used on the heart of zebrafish. According to the enzyme assay results, derivative TDA$_\mathbf8}}$ has shown an increase of telomerase enzyme activity.
吡啶-3/4-硫代羰胺衍生物被用作合成目标化合物的起始材料。吡啶-3/4-硫代羰胺衍生物与乙基2-氯乙酰乙酸酯在乙醇中反应,得到噻唑衍生物(1,2)。获得的两种乙基噻唑羧酸酯衍生物(1,2)经氢氧化钠溶液和乙醇处理,转化为羧酸(3,4)。羧酸衍生物(3,4)与硫半卡巴脲在磷酰氯中反应,形成氨基噻二唑环(5,6)。因此,得到了两种噻唑基噻二唑胺衍生物(5,6)。这两种衍生物(5,6)通过在醋酮中以三乙胺为存在下的氨基上与氯乙酰氯反应,转化为两种氯乙酰胺基噻二唑衍生物(7,8)。经过所有这些步骤后,得到了达到目标化合物所需的起始材料(7,8)。用最后一步获得的两种衍生物(7,8),在碳酸钾存在下在醋酮中与酚和苯硫酚反应。目标化合物,噻唑基噻二唑衍生物(TDA$_1-16}$),是完全独特的,其结构通过元素分析、红外、核磁共振和质谱数据阐明。经过所有这些合成步骤后,对获得的目标化合物进行了端粒酶活性研究。为此,在斑马鱼心脏上使用了基于PCR ELISA的TRAP方法。根据酶活性测定结果,衍生物TDA$_8}$显示了端粒酶酶活性的增加。