| 1239694-97-3

• CAS: 1239694-97-3
• 化学式: C₁₉H₁₆Co₂O₆
• 分子量: 458.319
• InChiKey: MDEFGDVEXUKLFM-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  None
• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
  None
• 氢给体数：
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• 氢受体数：
  None

反应信息

• 作为产物：
  描述：

  μ-η2-(4,4-dimethyl-1-phenylpent-2-yn-1-ol)dicobalthexacarbonyl 在 HBF₄*Me₂O 、 Zn 作用下， 以 diethyl ether 、 CH₂Cl₂ 为溶剂， 以62.2%的产率得到d,l-μ-η2-(2,2,9,9-tetramethyl-5,6-diphenyl-3,7-decadiyne)bis(dicobalthexacarbonyl)
  参考文献：
  名称：

  1,3-Steric Induction in Intermolecular Radical Reactions Mediated by a Co₂(CO)₆−Metal Core

  摘要：

  Diastereoselectivity of propargyl coupling reactions can be controlled by using the bulkiness of a gamma-substituent as a stereochemical tool. This 1,3-steric induction was observed with gamma-t-Bu and gamma-Me3Si groups, both favoring a d,l-configuration of the head-to-head coupling products, 3,4-disubstituted 1,5-alkadiynes (d,l- 95-100%). X-ray crystallography analysis suggests that the most favorable orientation of converging propargyl radicals is the one in which the bulky gamma-substituents are positioned anti to each other. Overall, the synthetic strategy of employing a Me3Si auxiliary group involves five steps and affords, with 28-33% overall yields, pure d,l-3,4-diaryl-1,5-hexadiynes, otherwise hardly accessible.

  DOI：

  10.1021/om100472y