Cytosine Palladium Hybrid Complex Immobilized on SBA‐15 as Efficient Heterogeneous Catalyst for the Aqueous Suzuki‐Miyaura Coupling,ChemistrySelect

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Cytosine Palladium Hybrid Complex Immobilized on SBA‐15 as Efficient Heterogeneous Catalyst for the Aqueous Suzuki‐Miyaura Coupling
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-06-11 , DOI: 10.1002/slct.201800348
Fatemeh Rajabi ₁ , Fatemeh Fayyaza ₁ , Rajoshree Bandyopadhyay ₂ , Francisco Ivars-Barcelo ₃ , Alain R. Puente-Santiago ₃ , Rafael Luque _{3,

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Affiliation

The synthesis of new heterogeneous catalysts has been achieved by the coupling of palladium on cytosine functionalized SBA‐15 nanoreactors (Pd‐Cyt@SBA‐15). The nanocatalytic systems show a surface area of 367 m² g⁻¹ with a mean pore diameter of 3.45 nm. Low angle‐XRD measurement reveals that the the anchoring of Pd inside the mesoporous channels of cytosine functionalized SBA‐15 (Cyt@SBA‐15) does not seriously disturb the overall ordered structure of the mesoporous silica. The hybrid nanoreactors act as highly active catalysts for the Suzuki−Miyaura cross‐coupling of a variety aryl chlorides and boronic acid in mixtures of isopropyl alcohol/water under mild conditions. The catalysts showed excellent reusability over seven successive runs under the given reaction conditions. Likewise, no significant leaching of the palladium was detected in the nanoreactors after reusing them several times.

中文翻译：

固定在SBA-15上的胞嘧啶钯杂化复合物作为铃木-宫浦水性偶联的高效多相催化剂

钯与胞嘧啶官能化的SBA-15纳米反应器（Pd-Cyt @ SBA-15）的偶联已经实现了新的非均相催化剂的合成。纳米催化体系的表面积为367 m ² g ^-1平均孔径为3.45 nm。低角度XRD测量表明，Pd在胞嘧啶功能化SBA-15（Cyt @ SBA-15）的介孔通道内的锚固不会严重干扰介孔二氧化硅的整体有序结构。在温和条件下，杂化纳米反应器可作为异丙醇/水混合物中各种芳基氯和硼酸的Suzuki-Miyaura交叉偶联的高活性催化剂。在给定的反应条件下，该催化剂在连续七个运行过程中均显示出极好的可重复使用性。同样，在重复使用几次后，在纳米反应器中也未检测到钯的明显浸出。

更新日期：2018-06-11

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