N-[3-(1-hydroxy-2,3-dimethoxy-4-oxocyclobut-2-en-1-yl)prop-2-ynyl]-N-(3-trimethylsilylprop-2-ynyl)benzenesulfonamide | 934972-36-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: N-[3-(1-hydroxy-2,3-dimethoxy-4-oxocyclobut-2-en-1-yl)prop-2-ynyl]-N-(3-trimethylsilylprop-2-ynyl)benzenesulfonamide
• CAS: 934972-36-8
• 化学式: C₂₁H₂₅NO₆SSi
• 分子量: 447.584
• InChiKey: VSFWUZIGAHIMRX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.38
• 重原子数：
  30
• 可旋转键数：
  8
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  102
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  N-[3-(1-hydroxy-2,3-dimethoxy-4-oxocyclobut-2-en-1-yl)prop-2-ynyl]-N-(3-trimethylsilylprop-2-ynyl)benzenesulfonamide 以 甲苯 为溶剂， 反应 0.33h， 生成 2-Benzenesulfonyl-6,7-dimethoxy-4-[1-trimethylsilanyl-meth-(Z)-ylidene]-1,2,3,4-tetrahydro-isoquinoline-5,8-dione
  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,N-di(prop-2-yn-1-yl)benzenesulfonamide 在 正丁基锂 作用下， 反应 2.67h， 生成 N-[3-(1-hydroxy-2,3-dimethoxy-4-oxocyclobut-2-en-1-yl)prop-2-ynyl]-N-(3-trimethylsilylprop-2-ynyl)benzenesulfonamide
  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

文献信息

• Ring Expansion of 4-Alkynylcyclobutenones. Synthesis of Piperidinoquinones, Highly Substituted Dihydrophenanthridines, Benzophenanthridines, and the Naturally Occurring Pyrrolophenanthridine, Assoanine
  作者：Yifeng Xiong、Harold W. Moore

  DOI：10.1021/jo9613803

  日期：1996.1.1

  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.