Abstract

A new multifunctional bimetallic nanocatalyst was prepared by immobilization of Cu/Ni-doped sulfated zirconium oxide on magnetic cadmium ferrite (CdFe₂O₄@SiO₂@ZrO₂/SO₄²⁻/Cu/Ni) and used as an efficient recyclable catalyst for one-pot as well as stepwise preparation of α-aminonitriles under mild conditions. The magnetic nanocatalyst was characterized by FTIR, TGA, VSM, XRD, EDX, FE-SEM, and TEM analyses. Also, the surface acidity of the catalyst was measured by pyridine adsorption assay. The catalyst possesses various active sites which could catalyst a variety of aromatic and aliphatic aldehydes to the corresponding α-amionitriles under moderate to high yields in the presence of aniline. Furthermore, transformation of ketones to the desired α-amionitriles and some bis-aminonitriles was also performed by this method. The catalyst could be readily recovered from the reaction mixture and reused for several times without significant loss of activity.

Graphic abstract

A general and efficient method has been developed for transformation of a variety of aliphatic, aromatic aldehydes and ketones to the corresponding α-aminonitriles using a multifunctional recyclable CdFe₂O₄@SiO₂@ZrO₂/SO₄²⁻/Cu/Ni nanocatalyst.

中文翻译：

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固定在CdFe 2 O 4 NPs上的Cu / Ni掺杂的硫酸锆氧化物：一种廉价，可持续且可磁回收的无机催化剂，用于在水性介质中有效制备α-氨基腈

摘要

通过将Cu / Ni掺杂的硫酸锆氧化物固定在磁性镉铁氧体上（CdFe ₂ O ₄ @SiO ₂ @ZrO ₂ / SO ₄ ^2-制备了一种新型的多功能双金属纳米催化剂/ Cu / Ni）用作一锅的有效可回收催化剂，以及在温和条件下逐步制备α-氨基腈。通过FTIR，TGA，VSM，XRD，EDX，FE-SEM和TEM分析对磁性纳米催化剂进行了表征。另外，通过吡啶吸附测定法测量催化剂的表面酸度。该催化剂具有各种活性位点，这些活性位点可以在苯胺存在下以中等至高收率将各种芳族和脂族醛催化成相应的α-乙腈。此外，也通过该方法将酮转化为所需的α-氨基腈和一些双氨基腈。可以容易地从反应混合物中回收催化剂，并重复使用几次，而不会显着降低活性。

图形摘要

已开发出一种通用且有效的方法，使用多功能可循环使用的CdFe ₂ O ₄ @SiO ₂ @ZrO ₂ / SO ₄ ^2- / Cu / Ni纳米催化剂将各种脂族，芳族醛和酮转化为相应的α-氨基腈。