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(T
DA$_1-16}$),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 ELI
SA的
TRAP方法。根据酶活性测定结果,衍
生物T
DA$_8}$显示了端粒酶酶活性的增加。