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Palladium nanoparticles immobilized on a nano-silica triazine dendritic polymer: a recyclable and sustainable nanoreactor for C–S cross-coupling

机译:固定在纳米二氧化硅三嗪树枝状聚合物上的钯纳米粒子:用于C-S交联的可回收和可持续的纳米反应器

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Dendrimers are of great interest due to their special structural topology and chemical versatility. Owing to their properties, dendrimers have found practical applications in catalytic processes as efficient nanoreactors. Therefore, we herein report an environmentally attractive strategy and highly efficient route for the synthesis of a wide variety of diaryl sulfides using palladium nanoparticles immobilized on a nano-silica triazine dendritic polymer (Pd _(np) -nSTDP) as a nanoreactor. In this manner, different diaryl or aryl heteroaryl sulfides and bis(aryl/heteroarylthio)benzene/anthracene/pyridine derivatives were prepared via C–S cross-coupling reactions of aryl halides with diaryl/diheteroaryl disulfides under thermal conditions and microwave irradiation. The catalyst could be easily recovered and reused several times without any significant loss of its activity.
机译:由于其特殊的结构拓扑和化学多功能性,树枝状大分子具有很大的兴趣。由于它们的性质,树枝状大分子发现了催化过程中的实际应用,作为高效的纳米反应器。因此,我们在本文中报告了使用固定在纳米二氧化硅三嗪树枝状聚合物(Pd _(NP)-NSTDP)上以纳米反应器固定在纳米二氧化硅三嗪树枝状聚合物(Pd _(NP)-NSTDP)上的钯纳米颗粒合成各种二芳基硫化物的高效途径。以这种方式,通过在热条件下与芳基卤化物的C-S交联反应与芳基卤化物的C-S交联反应,在热条件下,通过在热条件下和微波辐射下,通过C-S交联反应制备不同的二芳基芳基或芳基杂芳基硫化物和双(芳基/杂核)苯/蒽/吡啶衍生物。催化剂可以容易地回收并重复使用几次,而不会有任何显着的活性丧失。

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