Wacker Oxidation of Terminal Alkenes Over ZrO2‐Supported Pd Nanoparticles Under Acid‐ and Cocatalyst‐Free Conditions,ChemSusChem

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Wacker Oxidation of Terminal Alkenes Over ZrO2‐Supported Pd Nanoparticles Under Acid‐ and Cocatalyst‐Free Conditions
ChemSusChem ( IF 7.5 ) Pub Date : 2017-08-21 , DOI: 10.1002/cssc.201701016
Zhenzhong Zhang ₁ , Yuhya Kumamoto ₁ , Taishin Hashiguchi ₁ , Tetsuya Mamba ₁ , Haruno Murayama ₁ , Eiji Yamamoto ₁ , Tamao Ishida ₂ , Tetsuo Honma ₃ , Makoto Tokunaga ₁

Affiliation

Highly efficient Wacker oxidation of aromatic or aliphatic terminal alkenes into methyl ketones and benzofurans is developed by using reusable Pd⁰ nanoparticles (NPs) supported on ZrO₂ under acid‐ and cocatalyst‐free conditions. Molecular oxygen or air can be utilized as the terminal oxidant, which results in the formation of H₂O as the only theoretical byproduct. The activation of the Pd NPs by O₂ plays an important role in promoting this reaction. Interestingly, PdO supported on ZrO₂ showed no activity. Additionally, the Pd particle size significantly affects the catalytic activity, with an apparent optimal diameter of 4–12 nm. In addition to the heterogeneous catalyst forms, the Pd NPs can be generated from a Pd⁰ complex during the reaction, and these particles are even recyclable.

中文翻译：

在无酸和无助催化剂的条件下，ZrO2负载的钯纳米颗粒上末端烯烃的瓦克氧化

通过在无酸和无助催化剂的条件下，使用负载在ZrO ₂上的可重复使用的Pd ⁰纳米颗粒（NP），开发了将瓦克或芳香族或脂肪族末端烯烃高效氧化为甲基酮和苯并呋喃的方法。分子氧或空气可以用作末端氧化剂，这导致形成H ₂ O作为唯一的理论副产物。O ₂对Pd NPs的激活在促进该反应中起重要作用。有趣的是，PdO在ZrO ₂上受支持没有活动。另外，Pd的粒径显着影响催化活性，其最佳最佳直径为4–12 nm。除了非均相催化剂形式外，在反应过程中还可以从Pd ⁰络合物中生成Pd NP ，这些颗粒甚至可以回收利用。

更新日期：2017-08-21

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