强制嵌入探针(FIT 探针)是一种核酸探针,其中噻唑橙 (TO) 家族的嵌入染料充当替代核碱基。FIT 探针的杂交伴随着荧光的增强。为了寻找增加荧光开启和亮度的方法,我们在此报告了新荧光碱基替代物的合成。总共有九种不同的 TO 衍生物被引入到 FIT 探针中。六个不同序列的荧光测量表明,喹啉和苯并噻唑部分的取代会影响杂交时的荧光开启和探针-靶标双链体的亮度。含有三环苯并噻唑的 TO 衍生物可将荧光增强高达 18.6 倍,从而提供 FIT 探针信号杂交。提高荧光量子产率 (Φds高达 0.53)和高消光系数(ε 518高达 91000 M –1 ·cm –1)使该染料成为一种有趣的、并且在某些序列中优于之前用于 FIT 探针的标准噻唑橙的替代品。
The invention provides novel compounds and compositions of Formulas I and II, as well as methods of using them. The compounds can be used, for example, to quantify an amount of double stranded DNA in a sample subjected to nucleic acid amplification, or for real time monitoring of a nucleic acid amplification reaction. The compounds can be provided in a kit, for example, with other reagents and instructions for using the compounds and reagents.
A facile access to benzo[d]thiazole-2(3H)-thiones and benzo[d]thiazol-2(3H)-ones has been developed through a temperature-controlled intermolecular [3 + 2] annulation of N,N-disubstituted arylhydrazines with CS2 in the presence of DMSO. This protocol can obviate the prefunctionalization of the starting materials. This direct C–S/C–N bond formation reaction was performed in the absence of any external
通过温度控制的 N,N 分子间 [3 + 2] 环化,开发了一种容易获得苯并[ d ]噻唑-2(3 H )-硫酮和苯并[ d ]噻唑-2(3 H )-酮的方法-在DMSO存在下用CS 2二取代的芳基肼。该协议可以避免起始材料的预功能化。这种直接的 C-S/C-N 键形成反应是在没有任何外部催化剂、过渡金属、碱、配体和氧化剂的情况下进行的,具有高步骤经济性。
The Synthesis and Chemistry of Certain 2-Substituted 5,6-Dihydroimidazo-, -oxazolo-, and -thiazolo[ij]quinolines