2-hex-1-ynylbenzofuran-3-carbaldehyde | 1029882-84-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并呋喃
• 英文名称: 2-hex-1-ynylbenzofuran-3-carbaldehyde
• 英文别名: 2-(hex-1-yn-1-yl)benzofuran-3-carbaldehyde
• CAS: 1029882-84-5
• 化学式: C₁₅H₁₄O₂
• 分子量: 226.275
• InChiKey: FANNZHNZYMUCQH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.79
• 重原子数：
  17.0
• 可旋转键数：
  3.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.27
• 拓扑面积：
  30.21
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  2-hex-1-ynylbenzofuran-3-carbaldehyde 在 silver nitrate 、 叔丁胺 作用下， 以 乙醇 为溶剂， 反应 45.0h， 以62%的产率得到3-butylbenzofuro[3,2-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：

  2-bromobenzofuran-3-carbaldehyde 、 1-己炔 在 bis-triphenylphosphine-palladium(II) chloride 、 copper(l) iodide 、 三乙胺 作用下， 以 乙腈 为溶剂， 以72%的产率得到2-hex-1-ynylbenzofuran-3-carbaldehyde
  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

文献信息

• Rapid Access to Amino-Substituted Quinoline, (Di)Benzofuran, and Carbazole Heterocycles through an Aminobenzannulation Reaction
  作者：Martin Tiano、Philippe Belmont

  DOI：10.1021/jo800249f

  日期：2008.6.1

  quinolines, dibenzofurans, and carbazoles. The precursors are heterocycles bearing a methyl ketone group ortho to an internal alkyne. They are commercially available or can be obtained in three to four classical and efficient reactions: Vilsmeier−Haack, Sonogashira (diversity point), Grignard, and Ley’s oxidation. Upon aminobenzannulation reaction—classical conditions being pyrrolidine neat or in a solvent

  强大的氨基苯甲酸酯化反应已用于合成氨基取代的喹啉，二苯并呋喃和咔唑。前体是带有与内部炔烃邻位的甲基酮基的杂环。它们可以商购获得，也可以通过三到四个经典有效的反应获得：Vilsmeier-Haack，Sonogashira（多样性点），Grignard和Ley's氧化反应。在进行氨基苯甲酸酯化反应时（典型的条件是纯净的吡咯烷或在溶剂中和4ÅMS的条件下），在某些情况下，随着烯胺的形成，会得到有趣的双取代喹啉，二苯并呋喃和咔唑。由于meta产生了取代的杂环，并且还不同于经典的杂环方法，经典的杂环方法是在含杂原子的环上进行封闭而不是形成苯环。