2-(1-Oxo-2-diazoethyl)-3-(4-phenyl-1-butynyl)thiophene | 152771-57-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-(1-Oxo-2-diazoethyl)-3-(4-phenyl-1-butynyl)thiophene
• CAS: 152771-57-8
• 化学式: C₁₆H₁₂N₂OS
• 分子量: 280.35
• InChiKey: KWBWEZQEOWARMD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.22
• 重原子数：
  20.0
• 可旋转键数：
  4.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  53.47
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  2-(1-Oxo-2-diazoethyl)-3-(4-phenyl-1-butynyl)thiophene 以 二氯甲烷 为溶剂， 以66%的产率得到6,7-Dihydrophenanthro<4,3-b>thiophen-5-ol
  参考文献：
  名称：

  A comparative study of the decomposition of o-alkynyl-substituted aryl diazo ketones. Synthesis of polysubstituted .beta.-naphthols via arylketene intermediates

  摘要：

  The photochemical, thermal, and rhodium-catalyzed decomposition reactions of several closely related o-alkynyl or o-alkenyl alpha-diazoaceto- and propiophenone derivatives have been studied. The reaction outcome is markedly dependent upon the reaction conditions employed for nitrogen extrusion. Thermolysis or photolysis of o-alkynyl alpha-diazopropiophenone derivatives yields polysubstituted beta-naphthols. These products are derived from Wolff rearrangement of the initially formed carbene to give an aryl ketene which undergoes intramolecular cyclization onto the o-alkynyl substituent. In direct contrast to the thermal and photochemical results, Rh(II)-catalyzed decomposition yields products derived from direct attack of a rhodium carbenoid onto the tethered pi-system producing a vinyl carbenoid intermediate. Further reaction of the cyclized carbenoid with the starting diazo compound furnishes a vinyl indenone which undergoes a rapid intramolecular Diels-Alder reaction to produce a novel dimer whose structure was elucidated by an X-ray crystal analysis. Replacement of the methyl group on the diazo center with a sterically less demanding hydrogen atom was also found to play an important role in controlling the outcome of the Rh(II)-catalyzed reaction.

  DOI：

  10.1021/jo00075a045
• 作为产物：
  描述：

  4-苯基-1-丁炔 在 trans-bis(triphenylphosphine)palladium(II) chloride 、 potassium trimethylsilonate 、 copper(II) iodide 、 三乙胺 、 氯甲酸甲酯 作用下， 以 乙醚 为溶剂， 反应 32.0h， 生成 2-(1-Oxo-2-diazoethyl)-3-(4-phenyl-1-butynyl)thiophene
  参考文献：
  名称：

  A comparative study of the decomposition of o-alkynyl-substituted aryl diazo ketones. Synthesis of polysubstituted .beta.-naphthols via arylketene intermediates

  摘要：

  The photochemical, thermal, and rhodium-catalyzed decomposition reactions of several closely related o-alkynyl or o-alkenyl alpha-diazoaceto- and propiophenone derivatives have been studied. The reaction outcome is markedly dependent upon the reaction conditions employed for nitrogen extrusion. Thermolysis or photolysis of o-alkynyl alpha-diazopropiophenone derivatives yields polysubstituted beta-naphthols. These products are derived from Wolff rearrangement of the initially formed carbene to give an aryl ketene which undergoes intramolecular cyclization onto the o-alkynyl substituent. In direct contrast to the thermal and photochemical results, Rh(II)-catalyzed decomposition yields products derived from direct attack of a rhodium carbenoid onto the tethered pi-system producing a vinyl carbenoid intermediate. Further reaction of the cyclized carbenoid with the starting diazo compound furnishes a vinyl indenone which undergoes a rapid intramolecular Diels-Alder reaction to produce a novel dimer whose structure was elucidated by an X-ray crystal analysis. Replacement of the methyl group on the diazo center with a sterically less demanding hydrogen atom was also found to play an important role in controlling the outcome of the Rh(II)-catalyzed reaction.

  DOI：

  10.1021/jo00075a045

文献信息

• Padwa Albert, Chiacchio Ugo, Fairfax David J., Kassir Jamal M., Litrico A+, J. Org. Chem, 58 (1993) N 23, S 6429-6437
  作者：Padwa Albert, Chiacchio Ugo, Fairfax David J., Kassir Jamal M., Litrico A+

  DOI：——

  日期：——