Preparing Pd catalysts based on urea ligand via electrospinning for Suzuki–Miyaura cross‐coupling reactions,Applied Organometallic Chemistry

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Preparing Pd catalysts based on urea ligand via electrospinning for Suzuki–Miyaura cross‐coupling reactions
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2020-07-27 , DOI: 10.1002/aoc.5877
Guangyang Bao _{1,

2} , Xiaoye Fan ₁ , Tong Xu _{1,

3} , Chunping Li _{1,

3} , Jie Bai _{1,

3}

Affiliation

Pd‐catalyzed Suzuki–Miyaura cross‐coupling (SMC) reactions are important in chemistry. In this work, using electrospinning technology, we prepared a novel type of composite catalyst with ligand structures such as urea‐Pd/PAN (polyacrylonitrile) and used them to catalyze SMC reactions in nontoxic systems and “green” conditions (air atmosphere, low temperature, and short reaction time). This method of preparing hybrid materials is simple and easy to operate. The higher catalytic activity of the catalysts is attributed to active centers with rich electrons transferred from ligands with unique structures, which can decrease the activation energy of the rate‐determining step (oxidative addition). In addition, urea‐Pd/PAN composite catalysts exhibit higher catalytic performance than those reduced by H₂ because of the smaller size of active species and the more‐efficient oxidative addition to Pd⁰–ligand complexes compared to Pd⁰.

中文翻译：

通过电纺制备基于脲配体的Pd催化剂以进行Suzuki-Miyaura交叉偶联反应

Pd催化的Suzuki-Miyaura交叉偶联（SMC）反应在化学中很重要。在这项工作中，我们使用静电纺丝技术制备了具有配体结构的新型复合催化剂，例如尿素-Pd / PAN（聚丙烯腈），并用于在无毒系统和“绿色”条件（空气，低温）下催化SMC反应。，反应时间短）。这种制备混合材料的方法简单且易于操作。催化剂的较高催化活性归因于具有丰富电子的活性中心，这些电子从具有独特结构的配体转移而来，这可以降低速率确定步骤（氧化加成）的活化能。此外，尿素-钯/ PAN复合催化剂比H ₂还原的那些具有更高的催化性能。因为活性物质的更小的尺寸和更高效的氧化加成到的Pd ⁰ -配体复合物相比的Pd ⁰。

更新日期：2020-09-14

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