Char‐Supported Pd Complex of N‐Heterocyclic Carbene: A Novel Recyclable Catalyst for Coupling Reaction,ChemistrySelect

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Char‐Supported Pd Complex of N‐Heterocyclic Carbene: A Novel Recyclable Catalyst for Coupling Reaction
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-07-01 , DOI: 10.1002/slct.202001850
Samahe Sadjadi ₁ , Fatemeh Koohestani ₁

Affiliation

For the first time Salvia officinalis plant was applied as a biosource for the fabrication of hydrochar via hydrothermal process. The resultant char was then utilized as a support for the stabilization of N ‐heterocyclic carbene‐palladium complex. To this purpose, hydrochar was magnetized and successively functionalized with 3‐aminopropyltriethoxysilane, 2,4,6‐trichloro‐1,3,5‐triazine, and 1‐methylimidazole and then reacted with Pd(OAc)_{2 .} The obtained composite was characterized via XRD, TEM, ICP, BET, VSM, EDS, TGA, FTIR and elemental mapping analysis and then applied for catalyzing Suzuki coupling reaction in aqueous media under mild reaction condition. To optimize the reaction, the influences of the reaction parameters were scrutinized. It was found out that low content of the catalyst could promote the reaction of various starting materials to furnish the products in high yields. Experiments also affirmed high recyclability of the catalyst with unremarkable Pd leaching. The study of the nature of the catalysis established that the catalysis was heterogeneous.

中文翻译：

N-杂环碳的焦支撑的Pd配合物：新型可循环偶联反应的催化剂

丹参药材植物首次被用作通过水热法制造炭的生物来源。然后将所得的焦炭用作稳定N杂环卡宾-钯络合物的载体。为此，先将3-碳氨化的3-氨基丙基三乙氧基硅烷，2,4,6-三氯-1,3,5-三嗪和1-甲基咪唑磁化并随后与Pd（OAc）₂反应_。通过XRD，TEM，ICP，BET，VSM，EDS，TGA，FTIR和元素图谱分析对所得复合材料进行表征，然后在温和的反应条件下，用于催化Suzuki偶联反应。为了优化反应，仔细研究了反应参数的影响。发现低含量的催化剂可以促进各种起始原料的反应，从而以高收率提供产物。实验还证实了催化剂的高可回收性，钯的浸出不明显。对催化性质的研究证实，催化是多相的。

更新日期：2020-07-01

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