Novel biocompatible core/shell Fe3O4@NFC@Co(ii) as a new catalyst in a multicomponent reaction: an efficient and sustainable methodology and novel reusable material for one-pot synthesis of 4H-pyran and pyranopyrazole in aqueous media

Pouya Ghamari Kargar; Ghodsieh Bagherzade; Hossein Eshghi

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Novel biocompatible core/shell Fe3O4@NFC@Co(ii) as a new catalyst in a multicomponent reaction: an efficient and sustainable methodology and novel reusable material for one-pot synthesis of 4H-pyran and pyranopyrazole in aqueous media

机译：新型生物相容性核/壳Fe3O4 @ NFC @ Co（II）作为多组分反应中的新催化剂：一种高效和可持续的方法和新型可再用材料，用于在含水介质中的4H-吡喃和吡喃唑的单罐合成

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Today, due to the developing need for inexpensive catalysts, recyclable magnetic nanocatalysts immobilized on polysaccharides possess many advantages over classical heterogeneous catalysts. However, cellulose has been an appealing material in catalysis science and technology. In this work, by controlling the interaction between the inorganic complexes and the support material, we designed a high activity nanostructured combination of a magnetic nanoparticle Fe _(3) O _(4) @NFC@Co( II ) terminated complex as a multi-nuclear catalyst. This protocol involves an environment friendly approach using cobalt acetate. The magnetic nanostructure Fe _(3) O _(4) @NFC@Co( II ) can be used as a novel, green, and a powerful catalyst that demonstrates a short reaction time, high yield and easy procedure for the cascade Knoevenagel–Michael-cyclocondensation reaction for the one-pot synthesis of 4 H -pyrans and pyranopyrazoles. The superparamagnetic nanocomposite could be conveniently separated by using an external magnet. Moreover, the catalyst could be reused at least five times in new reaction runs without a noticeable loss of activity. The prepared catalyst was characterized by FT-IR, XRD, VSM, FESEM, EDAX, TEM, ICP, and TGA techniques. The experiments were achieved with good yields and implied that the catalytic method was effective and convenient for heterocyclic synthesis.

机译：如今，由于对廉价催化剂的发展需求，固定在多糖上的可回收磁性纳米催化剂具有与古典异质催化剂的许多优点。然而，纤维素在催化科学和技术中是一种吸引人的材料。在这项工作中，通过控制无机络合物和载体材料之间的相互作用，我们设计了一种磁性纳米颗粒Fe _（3）O _（4）o _（4）o re _（ii）的高活性纳米结构组合终止复合物作为多重 - 核催化剂。该协议涉及使用醋酸钴的环保方法。磁性纳米结构Fe _（3）O _（4）o _（4）o _（4）o @ co（ii）可用作新颖的，绿色和强大的催化剂，该催化剂展示了短反应时间，高产率和级联的knoevenagel-的容易程序 - 迈克尔 - 环聚致抗反应为4h-吡喃和吡喃吡唑的一锅合成。通过使用外部磁铁可以方便地分离超顺磁纳米复合材料。此外，催化剂可以在没有明显的活性损失的情况下在新反应中重复使用至少五次。制备的催化剂的特征在于FT-IR，XRD，VSM，FESEM，eDAX，TEM，ICP和TGA技术。通过良好的产率实现了实验，并暗示催化方法是有效且方便的杂环合成。

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《RSC Advances》 |2020年第61期|共12页
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Pouya Ghamari Kargar; Ghodsieh Bagherzade; Hossein Eshghi;
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1. Novel biocompatible core/shell Fe3O4@NFC@Co(ii) as a new catalyst in a multicomponent reaction: an efficient and sustainable methodology and novel reusable material for one-pot synthesis of 4H-pyran and pyranopyrazole in aqueous media [J] . Kargar Pouya Ghamari, Bagherzade Ghodsieh, Eshghi Hossein RSC Advances . 2020,第61期

机译：新型生物相容性核/壳Fe3O4 @ NFC @ Co（II）作为多组分反应中的新催化剂：一种高效和可持续的方法和新型可再用材料，用于在含水介质中的4H-吡喃和吡喃唑的单罐合成
2. N,2-Dibromo-6-chloro-3,4-dihydro-2H-benzo[e]-[1,2,4]thiadiazine-7-sulfonamide 1,1-dioxide: an efficient and homogeneous catalyst for one-pot synthesis of 4H-pyran, pyranopyrazole and pyrazolo[1,2-b]phthalazine derivatives under aqueous media [J] . Khazaei Ardeshir, Zolfigol Mohammad Ali, Karimitabar Fatemeh, RSC Advances . 2015,第87期

机译：N，2-二溴-6-氯-3,4-二氢-2H-苯并[e]-[1,2,4]噻二嗪-7-磺酰胺1,1-二氧化物：一锅高效均质催化剂介质下4H-吡喃，吡喃并吡唑和吡唑并[1,2-b]酞嗪衍生物的合成
3. 1,4-Diazabicyclo[2.2.2]octane as an efficient catalyst for a clean, one-pot synthesis of tetrahydrobenzo[b]pyran derivatives via multicomponent reaction in aqueous media [J] . Tahmassebi D., Bryson J.A., Binz S.I. Synthetic Communications . 2011,第16a18期

机译：1,4-二氮杂双环[2.2.2]辛烷作为在水介质中通过多组分反应清洁，一锅法合成四氢苯并[b]吡喃衍生物的有效催化剂
4. Nano CuFe_2O_4: A reusable magnetic catalyst for the synthesis of 2-amino-5,10-dioxo-4-styryl-5,10-dihydro-4H-benzogchromene-3-carbonitrile via a one-pot multicomponent reaction [C] . A. H. Cahyana, S. Saidah, B. Ardiansah International Symposium on Current Progress in Mathematics and Sciences . 2018

机译：纳米CuFe_2O_4：通过单盆多组分反应合成2-氨基-5,10-二氧基-4-苯并-5,10-二氢-4H-苯并铬-3-腈的可重复使用的磁性催化剂
5. New developments toward the synthesis of heterocycles and applications in green chemistry. I. A simple and essentially one-pot synthesis of N-aminated heterocycles using phase transfer catalyst (Aliquat-336). II. Synthesis of pharmaceutically important pyrrole derivatives. III. Applications in green chemistry: Surfactant-mediated environmentally friendly cleavage of aromatic esters and trans-esterification under solvent-free neutral conditions . [D] . Patel, Nitinchandra. 2005

机译：杂环合成的新进展及其在绿色化学中的应用。 I.使用相转移催化剂（Aliquat-336）简单且基本上一锅合成N-胺化的杂环。二。药学上重要的吡咯衍生物的合成。三，在绿色化学中的应用：在无溶剂的中性条件下，表面活性剂介导的环境友好的芳族酯裂解和酯交换反应。
6. ZnO Nanoparticles as an Efficient Heterogeneous Reusable and Ecofriendly Catalyst for Four-Component One-Pot Green Synthesis of Pyranopyrazole Derivatives in Water [O] . Harshita Sachdeva, Rekha Saroj 2013

机译：ZnO纳米颗粒作为高效多相可重复使用和生态友好的催化剂用于水中的吡喃并吡唑衍生物的四组分一锅法绿色合成
7. Novel biocompatible core/shell Fe3O4@NFC@Co(ii) as a new catalyst in a multicomponent reaction: an efficient and sustainable methodology and novel reusable material for one-pot synthesis of 4H-pyran and pyranopyrazole in aqueous media [O] . Pouya Ghamari Kargar, Ghodsieh Bagherzade, Hossein Eshghi 2020

机译：新型生物相容性核/壳Fe3O4 @ NFC @ Co（II）作为多组分反应中的新催化剂：一种高效和可持续的方法和新型可再用材料，用于在含水介质中的4H-吡喃和吡喃唑的单罐合成

Novel biocompatible core/shell Fe3O4@NFC@Co(ii) as a new catalyst in a multicomponent reaction: an efficient and sustainable methodology and novel reusable material for one-pot synthesis of 4H-pyran and pyranopyrazole in aqueous media

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