Fe3O4@SiO2@IL‐, PVP magnetic nanoparticles: Effective synthesis of spirooxindoles

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Veysipour Shahla; NASR ESFAHANI MASOUD; RAFIEE ZAHRA; Eftekhari far Behrouz

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Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF CATALYSIS Year:2021 | Volume:11 | Issue:2 Page(s): 125-136

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Title

Fe3O4@SiO2@IL‐, PVP magnetic nanoparticles: Effective synthesis of spirooxindoles

Author(s)

Veysipour Shahla | NASR ESFAHANI MASOUD | RAFIEE ZAHRA | Eftekhari far Behrouz | Issue Writer Certificate

Keywords

Magnetic nanoparticles

Spirooxindoles

Green synthesis

Fe3O4@SiO2@IL‐

PVP nanocomposite

Reusable catalyst

Abstract

Various magnetite heterogeneous catalysts for the organic reaction are increasingly recognized while their stability still is a critical challenge. In this regard, SiO2, ionic liquid (IL), and polyvinyl pyrrolidone (PVP) were applied as a three-layer stabilization system for modifying magnetic Fe3O4 to produce Fe3O4@SiO2@IL‐, PVP as a novel nanocatalyst. The Fe3O4@SiO2@IL‐, PVP as stabilized heterogeneous catalysts were utilized in a robust, and environmentally friendly strategy for the preparation of the spirooxindole derivatives by the one-pot condensation of isatin, malononitrile, and 1, 3-dicarbonyl in a water solvent. The proposed method revealed a high yield spirooxindole derivatives preparation (99%) at short reaction times (1. 0 min), low catalyst mass (0. 002 g), and satisfactory temperature (30 °, C) which confirm the lack of any tedious challenge and promising applicability and reusability. This work introduces a rational core-shell nanosystem design with a facile and novel construction strategy to arrive at nonexquisite metal-based composite catalysts with superior catalytic proficiency and prominent long-term stability.

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