3-(thiophen-3-ylethynyl)benzo[b]thiophene-2-carbaldehyde | 1430118-16-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并噻吩类
• 英文名称: 3-(thiophen-3-ylethynyl)benzo[b]thiophene-2-carbaldehyde
• CAS: 1430118-16-3
• 化学式: C₁₅H₈OS₂
• 分子量: 268.36
• InChiKey: CFXBYVZUKVDFIH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.18
• 重原子数：
  18.0
• 可旋转键数：
  1.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  17.07
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  3-(thiophen-3-ylethynyl)benzo[b]thiophene-2-carbaldehyde 在 silver nitrate 、 叔丁胺 作用下， 以 乙醇 为溶剂， 反应 36.0h， 以71%的产率得到3-(thiophen-3-yl)benzo[4,5]thieno[2,3-c]pyridine
  参考文献：
  名称：

  Tandem Approach to Benzothieno- and Benzofuropyridines from o-Alkynyl Aldehydes via Silver-Catalyzed 6-endo-dig Ring Closure

  摘要：

  An operationally simple silver-catalyzed tandem strategy for the synthesis of benzothienopyridines 7a-t and benzofuropyridines 8a-p by the reaction of o-alkynyl aldehyde 4a-t and 5a-p with tert-butylamine 6 under mild reaction conditions is described. The present methodology provides a facile conversion of easily accessible o-alkynyl aldehydes into medicinally useful heterocycles in good to excellent yields under mild and environmentally friendly reaction conditions with excellent regioselectivity. The developed chemistry has been successfully extended for the selective synthesis of C-4 deuterated benzothienopyridines 7u-v and benzofurop-yridines 8q-r. The role of the ethanolic proton in the reaction was validated by deuterium-labeling experiments.

  DOI：

  10.1021/acs.joc.5b01647
• 作为产物：
  描述：

  3-乙炔基噻吩 在 bis-triphenylphosphine-palladium(II) chloride 、 三乙胺 作用下， 以75%的产率得到3-(thiophen-3-ylethynyl)benzo[b]thiophene-2-carbaldehyde
  参考文献：
  名称：

  Silver-Catalyzed Tandem Synthesis of Naphthyridines and Thienopyridines via Three-Component Reaction

  摘要：

  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.

  DOI：

  10.1021/jo400400c

文献信息

• Metal-free regioselective tandem synthesis of diversely substituted benzimidazo-fused polyheterocycles in aqueous medium
  作者：Pawan K. Mishra、Akhilesh K. Verma

  DOI：10.1039/c6gc02330d

  日期：——

  An operationally simple greener approach for the synthesis of diversely substituted benzimidazo-fused polyheterocycles under the metal-free condition in water has been described. The aqueous medium accelerates the formation of desired...

  已经描述了一种在水中无金属条件下合成多种取代的苯并咪唑稠合的多杂环化合物的操作简单的绿色方法。水性介质可加速所需...
• 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。