N-butyl-4-methoxy-N-prop-2-ynylaniline | 1026737-89-2

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: N-butyl-4-methoxy-N-prop-2-ynylaniline
• CAS: 1026737-89-2
• 化学式: C₁₄H₁₉NO
• 分子量: 217.311
• InChiKey: ZQCCLAIFWMCKMJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  16
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  12.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  N-butyl-4-methoxy-N-prop-2-ynylaniline 在 正丁基锂 作用下， 以 甲苯 为溶剂， 反应 2.75h， 生成 5-butyl-5,6-dihydro-2,8,9-trimethoxy-7,10-phenanthridinediol
  参考文献：
  名称：

  Ring Expansion of 4-Alkynylcyclobutenones. Synthesis of Piperidinoquinones, Highly Substituted Dihydrophenanthridines, Benzophenanthridines, and the Naturally Occurring Pyrrolophenanthridine, Assoanine

  摘要：

  New synthetic routes to a variety of N-heterocyclic quinones and hydroquinones are described. These include thermolyses of 4-hydroxy-4-[4-N-(benzenesulfonyl)-4-aza-1,6-dialkynyl]cyclobutenones to piperidinoquinones and 4-hydroxy-4-[3-(N-phenylamino)-1-propynyl] cyclobutenones to dihydrophenanthridinediols. Included in the array of products available by this method are benzophenanthridines, indolophenanthridines, isoindoloindoles, and pyrrolophenanthridines. The methodology was employed in a five-step synthesis of the alkaloid assoanine starting with dimethyl squarate and indoline. The key step in all of these transformations is the ring expansion of appropriately substituted 4-hydroxy-4-alkynylcyclobutenones. These are envisaged to undergo electrocyclic ring opening to the corresponding enynylketenes which ring close to diradical intermediates that then lead to products via either radical additions to proximal alkyne moieties or undergo homolytic aromatic substitution to appropriately placed aryl groups. The synthetic scope and mechanism of the ring expansion reactions are discussed.

  DOI：

  10.1021/jo9613803
• 作为产物：
  描述：

  N-butyl-4-methoxyaniline 、 3-溴丙炔 在 potassium carbonate 作用下， 以 丙酮 、 甲苯 为溶剂， 反应 21.0h， 以91%的产率得到N-butyl-4-methoxy-N-prop-2-ynylaniline
  参考文献：
  名称：

  Ring Expansion of 4-Alkynylcyclobutenones. Synthesis of Piperidinoquinones, Highly Substituted Dihydrophenanthridines, Benzophenanthridines, and the Naturally Occurring Pyrrolophenanthridine, Assoanine

  摘要：

  New synthetic routes to a variety of N-heterocyclic quinones and hydroquinones are described. These include thermolyses of 4-hydroxy-4-[4-N-(benzenesulfonyl)-4-aza-1,6-dialkynyl]cyclobutenones to piperidinoquinones and 4-hydroxy-4-[3-(N-phenylamino)-1-propynyl] cyclobutenones to dihydrophenanthridinediols. Included in the array of products available by this method are benzophenanthridines, indolophenanthridines, isoindoloindoles, and pyrrolophenanthridines. The methodology was employed in a five-step synthesis of the alkaloid assoanine starting with dimethyl squarate and indoline. The key step in all of these transformations is the ring expansion of appropriately substituted 4-hydroxy-4-alkynylcyclobutenones. These are envisaged to undergo electrocyclic ring opening to the corresponding enynylketenes which ring close to diradical intermediates that then lead to products via either radical additions to proximal alkyne moieties or undergo homolytic aromatic substitution to appropriately placed aryl groups. The synthetic scope and mechanism of the ring expansion reactions are discussed.

  DOI：

  10.1021/jo9613803