Zn(ii) anchored onto the magnetic natural hydroxyapatite (ZnII/HAP/Fe3O4): as a novel, green and recyclable catalyst for A3-coupling reaction towards propargylamine synthesis under solvent-free conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (108) ◽  
pp. 106473-106484 ◽  
Author(s):  
Zeinab Zarei ◽  
Batool Akhlaghinia
Keyword(s):  
Coupling Reaction ◽  
Recyclable Catalyst ◽  
Solvent Free ◽  
Recoverable Catalyst ◽  
Solvent Free Conditions ◽  
Ft Ir ◽  
Magnetically Recoverable Catalyst ◽  
A3 Coupling ◽  
Natural Hydroxyapatite

In this paper, Zn(ii) anchored onto the magnetic natural hydroxyapatite (ZnII/HAP/Fe3O4), as a new and magnetically recoverable catalyst, was prepared and characterized using different techniques such as FT-IR, XRD, TGA, TEM, EDX, VSM and ICP.

scholarly journals Synthesis of Bis(indolyl)methanes Using Fe3O4 Nanoparticle as a Robust, Efficient and Magnetically Recoverable Catalyst Under Solvent-Free Conditions

2018 ◽  
Vol 10 (5) ◽  
pp. 1591-1606 ◽  
Author(s):  
Julia C. M. Willig ◽  
Alexandra A. Amaral ◽  
Jamal Rafique ◽  
Sumbal Saba ◽  
Stefany Valiati ◽  
...  
Keyword(s):  
Solvent Free ◽  
Fe3o4 Nanoparticle ◽  
Recoverable Catalyst ◽  
Solvent Free Conditions ◽  
Magnetically Recoverable Catalyst

Design, preparation and characterization of a new ionic liquid, 1,3-disulfonic acid benzimidazolium chloride, as an efficient and recyclable catalyst for the synthesis of tetrahydropyridine under solvent-free conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 67405-67411 ◽  
Author(s):  
Mohsen Abbasi
Keyword(s):  
Ionic Liquid ◽  
Mass Spectra ◽  
Recyclable Catalyst ◽  
Solvent Free ◽  
Disulfonic Acid ◽  
H Nmr ◽  
Solvent Free Conditions ◽  
Ft Ir ◽  
C Nmr

In the present work, 1,3-disulfonic acid benzimidazolium chloride as a new ionic liquid, is synthesized, and characterized by studying its FT-IR, 1H NMR, 13C NMR as well as mass spectra.

Sulfamic acid-functionalized hydroxyapatite-encapsulated γ-Fe2O3 nanoparticles as a magnetically recoverable catalyst for synthesis of N-fused imidazole-quinoline conjugates under solvent-free conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (101) ◽  
pp. 83530-83537 ◽  
Author(s):  
Arash Mouradzadegun ◽  
Leila Ma'mani ◽  
Mohammad Mahdavi ◽  
Zahra Rashid ◽  
Abbas Shafiee ◽  
...  
Keyword(s):  
Sulfamic Acid ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Fe2o3 Nanoparticles ◽  
Recoverable Catalyst ◽  
Solvent Free Conditions ◽  
Magnetically Recoverable Catalyst

γ-Fe2O3-HAp-(CH2)3-NHSO3H was shown to be a powerful and reusable catalyst for the synthesis of N-fused imidazole-quinoline conjugates under solvent-free conditions.

Nano-Polyoxotungstate as a Recyclable and Highly Efficient Catalyst for Cycloaddition of CO2 to Cyclic Carbonates under Solvent-free Conditions

2018 ◽  
Vol 15 (4) ◽  
pp. 533-540 ◽  
Author(s):  
Reza Haddad ◽  
Mehdi D. Telgerd ◽  
Hamid Abedi ◽  
Ali Roostaie
Keyword(s):  
Surface Acidity ◽  
Solvent Free ◽  
Cyclic Carbonates ◽  
Spent Catalyst ◽  
Efficient Catalyst ◽  
Filtration Method ◽  
External Magnet ◽  
Recoverable Catalyst ◽  
Solvent Free Conditions ◽  
Ft Ir

Aim and Objective: In this study, for the first time keplerate cluster [Cu20Cl(OH)24(H2O)12 (P8W48O184)]25- (hereafter [W48P8Cu20]) was supported on SMNP (Fe3O4-@SiO2) via amine functionality (ASMNP) as a magnetically-recoverable catalyst (hereafter [WPCu@ASMNP]). This nanocatalyst showed high activity for the synthesis of cyclic carbonates under solvent-free conditions. Materials and Methods: After preparation, the nanocatalyst was characterized by FT-IR, XRD, ICP-AES, TGA, TEM and SEM. Surface acidity was determined by a potentiometric titration with n-butyl amine. The effect of different parameters like catalyst amount, reaction time, temperature and pressure in the presence of [WPCu@ASMNP] were studied. Results: Optimal reaction conditions were obtained for 0.5mol% of catalyst, reaction temperature of 100°C and CO2 pressure of 1.5 MPa. The [WPCu@ASMNP] could be separated from the reaction and reused for five times with an external magnet without notable decrease in the activity. Finally, stability of the catalyst and its reusability were evaluated using a hot filtration method. The FT-IR and the control experiments (hot filtration) after five cycles confirmed the strongly catalyst immobilization to the ASMNP. Conclusion: The nanocatalyst is shown to be effective heterogeneous and recyclable catalyst for the synthesis of cyclic carbonates from CO2 and epoxides under mild conditions without any additional co-solvent and cocatalyst. This catalyst has a good substrate tolerance as demonstrated by its activity towards different epoxides. Importantly, the reaction could be carried out under solvent free conditions. The heterogeneous nature of the catalyst is proved by recovering and reusing this catalyst without any appreciable loss in catalytic activity and by the FT-IR spectroscopic characterization of the fresh and spent catalyst. The product separation and catalyst recycling are short using an external magnet.

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