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首页> 外文期刊>RSC Advances >Sulfuric acid functionalized MCM-41 coated on magnetite nanoparticles as a recyclable core-shell solid acid catalyst for three-component condensation of indoles, aldehydes and thiols
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Sulfuric acid functionalized MCM-41 coated on magnetite nanoparticles as a recyclable core-shell solid acid catalyst for three-component condensation of indoles, aldehydes and thiols

机译：硫酸功能化的MCM-41涂层在磁铁矿纳米颗粒上，作为可回收的核壳固体酸催化剂，用于吲哚，醛和硫醇的三组分缩合

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摘要

Magnetite nanoparticles were used as a core for -OSO3H functionalized mesoporous MCM-41 shell to provide a core-shell solid acid catalyst (Fe3O4@MCM-41-OSO3H). The catalyst was characterized by transmission electron microscopy (TEM), infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and a vibrating sample magnetometer (VSM). The obtained nano-magnetic catalyst was used in the three-component reaction of indoles, aldehydes and thiols to furnish the desired 3-[(aryl)(arylthio)methyl]-1H-indoles in good yields under very mild reaction conditions. The unique feature of the reaction was the ease of work-up and catalyst recovery. The recovered catalyst maintained catalytic activity for five successive runs.
机译：磁铁矿纳米颗粒用作-OSO3H功能化介孔MCM-41壳的核，以提供核-壳固体酸催化剂（Fe3O4 @ MCM-41-OSO3H）。通过透射电子显微镜（TEM），红外光谱（FT-IR），X射线衍射（XRD）和振动样品磁力计（VSM）对催化剂进行了表征。在非常温和的反应条件下，将得到的纳米磁性催化剂用于吲哚，醛和硫醇的三组分反应中，以高收率提供所需的3-[（（芳基）（芳基硫代）甲基] -1H-吲哚。该反应的独特特征是易于后处理和催化剂回收。回收的催化剂连续五次保持催化活性。

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