6-methoxy-2-[(3-methylphenyl)ethynyl]-3-quinolinecarbaldehyde | 1430118-14-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 喹啉及其衍生物
• 英文名称: 6-methoxy-2-[(3-methylphenyl)ethynyl]-3-quinolinecarbaldehyde
• 英文别名: 6-methoxy-2-(m-tolylethynyl)quinoline-3-carbaldehyde
• CAS: 1430118-14-1
• 化学式: C₂₀H₁₅NO₂
• 分子量: 301.345
• InChiKey: GMSLYULBDOAZRI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.76
• 重原子数：
  23.0
• 可旋转键数：
  2.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.1
• 拓扑面积：
  39.19
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  6-methoxy-2-[(3-methylphenyl)ethynyl]-3-quinolinecarbaldehyde 在 ammonium hydroxide 、 potassium carbonate 作用下， 以 乙醇 为溶剂， 反应 2.5h， 以55%的产率得到8-methoxy-3-(3-methylphenyl)benzo[b][1,6]naphthyridine
  参考文献：
  名称：

  Overcoming Compound Fluorescence in the FLiK Screening Assay with Red-Shifted Fluorophores

  摘要：

  In the attempt to discover novel chemical scaffolds that can modulate the activity of disease-associated enzymes, such as kinases, biochemical assays are usually deployed in high-throughput screenings. First-line assays, such as activity-based assays, often rely on fluorescent molecules by measuring a change in the total emission intensity, polarization state, or energy transfer to another fluorescent molecule. However, under certain conditions, intrinsic compound fluorescence can lead to difficult data analysis and to false-positive, as well as false-negative, hits. We have reported previously on a powerful direct binding assay called fluorescent labels in kinases ('FLiK'), which enables a sensitive measurement of conformational changes in kinases upon ligand binding. In this assay system, changes in the emission spectrum of the fluorophore acrylodan, induced by the binding of a ligand, are translated into a robust assay readout. However, under the excitation conditions of acrylodan, intrinsic compound fluorescence derived from highly conjugated compounds complicates data analysis. We therefore optimized this method by identifying novel fluorophores that excite in the far red, thereby avoiding compound fluorescence. With this advancement, even rigid compounds with multiple pi-conjugated ring systems can now be measured reliably. This study was performed on three different kinase constructs with three different labeling sites, each undergoing distinct conformational changes upon ligand binding. It may therefore serve as a guideline for the establishment of novel fluorescence-based detection assays.

  DOI：

  10.1021/ja403074j
• 作为产物：
  描述：

  4'-甲氧基乙酰苯胺 在 copper(l) iodide 、 四(三苯基膦)钯 、 N,N-二异丙基乙胺 、 三氯氧磷 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 24.0h， 生成 6-methoxy-2-[(3-methylphenyl)ethynyl]-3-quinolinecarbaldehyde
  参考文献：
  名称：

  Overcoming Compound Fluorescence in the FLiK Screening Assay with Red-Shifted Fluorophores

  摘要：

  In the attempt to discover novel chemical scaffolds that can modulate the activity of disease-associated enzymes, such as kinases, biochemical assays are usually deployed in high-throughput screenings. First-line assays, such as activity-based assays, often rely on fluorescent molecules by measuring a change in the total emission intensity, polarization state, or energy transfer to another fluorescent molecule. However, under certain conditions, intrinsic compound fluorescence can lead to difficult data analysis and to false-positive, as well as false-negative, hits. We have reported previously on a powerful direct binding assay called fluorescent labels in kinases ('FLiK'), which enables a sensitive measurement of conformational changes in kinases upon ligand binding. In this assay system, changes in the emission spectrum of the fluorophore acrylodan, induced by the binding of a ligand, are translated into a robust assay readout. However, under the excitation conditions of acrylodan, intrinsic compound fluorescence derived from highly conjugated compounds complicates data analysis. We therefore optimized this method by identifying novel fluorophores that excite in the far red, thereby avoiding compound fluorescence. With this advancement, even rigid compounds with multiple pi-conjugated ring systems can now be measured reliably. This study was performed on three different kinase constructs with three different labeling sites, each undergoing distinct conformational changes upon ligand binding. It may therefore serve as a guideline for the establishment of novel fluorescence-based detection assays.

  DOI：

  10.1021/ja403074j

文献信息

• Stereoselective tandem synthesis of thiazolo fused naphthyridines and thienopyridines from o-alkynylaldehydes via Au(<scp>iii</scp>)-catalyzed regioselective 6-endo-dig ring closure
  作者：Rajeev R. Jha、Rakesh K. Saunthwal、Akhilesh K. Verma

  DOI：10.1039/c3ob42035c

  日期：——

  An operationally simple approach for the stereoselective tandem synthesis of novel thiazolo fused naphthyridines 5a–o and thienopyridines 8a–e by the reaction of o-alkynylaldehydes with L-cystine methyl ester hydrochloride via Au(III)-catalyzed regioselective 6-endo-dig ring closure under mild reaction conditions is described. It is noteworthy that alkynes bearing an alkyl and a strong electron-withdrawing nitro group successfully afforded the desired products in good yields.

  本研究介绍了一种操作简单的方法，即在温和的反应条件下，通过 Au(III) 催化的区域选择性 6-endo-dig 封环反应，使邻炔醛与 L-胱氨酸甲酯盐酸盐发生反应，从而立体选择性地串联合成新型噻唑并萘啶 5a-o 和噻吩并吡啶 8a-e。值得注意的是，带有一个烷基和一个强夺电子硝基的炔烃成功地以良好的收率得到了所需的产物。
• Silver-Catalyzed Tandem Synthesis of Naphthyridines and Thienopyridines via Three-Component Reaction
  作者：Akhilesh K. Verma、Siva K. Reddy Kotla、Deepak Choudhary、Monika Patel、Rakesh K. Tiwari

  DOI：10.1021/jo400400c

  日期：2013.5.3

  An efficient approach for the silver-catalyzed regioselective tandem synthesis of highly functionalized 1,2-dihydorbenzo[1,6]naphthyridines 6a-z and 7a-e by the reaction of ortho-alkynylaldehydes 3a-n with amines 4a-d and ketones 5a-c/active methylene compounds 5d-g, under mild reaction conditions, is described. The scope of the developed chemistry was successfully extended for the direct synthesis of 1,2-dihydorbenzo[4,5]thieno[2,3-c]pyridines 8a-e, which is known as the sulfur analogue of beta-carbolines. Naphthyridines 6a-z and thienopyridines 8a-e were obtained via dual activation concept using L-proline as organocatalyst; however, naphthyridines 7a-e were synthesized without using organocatalyst. The reaction shows selective N-C bond formation on the more electrophilic alkynyl carbon, resulting in the regioselective 6-endo-digcyclized products. Reactivity behavior of electron-deficient and electron-rich ortho-alkynylaldehydes in the synthesis of naphthyridines and thienopyridine by three-component reaction is supported by the control experiment.