在四核铁复合体中通过假定终端氧物种介导的分子内C-H和C-F键氧化
Graham de Ruiter1, Niklas B Thompson1, Michael K Takase1
1Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States.
Journal of the American Chemical Society
|January 14, 2016
概括
四核铁复合物实现了分子内部的C-H和C-F键氧化. 这项研究揭示了通过Fe-oxo中间体的区域选择性化,这表明C-O键形成的不同反应途径.
科学领域:
- 无机化学
- 有机金属化学
- 催化剂
背景情况:
- 铁复合物在各种催化氧化反应中至关重要.
- 了解C-H和C-F键激活是合成化学的关键.
- 四核集群为反应提供独特的电子和结构性质.
研究的目的:
- 通过四核铁复合物来研究分子内C-H和C-F键的氧化.
- 阐明由这些铁团介导的区域选择性化机制.
- 探索Fe-oxo中间体的作用和潜在的电子传输途径.
主要方法:
- 四核铁复合物的合成和表征 ([LFe3(PhPz) 3OFe][OTf]2及其化模拟物).
- 铁复合物与的反应以诱导C-H和C-F键的氧化.
- 对反应产物的分析以确定区域选择性和识别中间体.
主要成果:
- 通过C-H或C-F键形成C-O键,实现了桥梁酸的区域选择性化.
- 反应性表明终端和反应性铁氧 (Fe-oxo) 中间体的参与.
- 有证据表明,在中可能存在分子内电子转移,影响反应途径 (Fe(IV) - oxo与Fe(III) - oxo).
结论:
- 四核铁复合物可以有效地调解分子内C-H和C-F键的氧化.
- 这项研究强调了Fe-oxo中间体的形成及其在C-O键形成中的作用.
- 对于观察到的化,提出了涉及不同铁氧化状态的不同反应机制.
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