MgO-coated-Fe3O4 nanoparticles as a magnetically recoverable and reusable catalyst for the synthesis of 1-hydroxyphosphonates

Kaboudin, Babak; Kazemi, Foad; Habibi, Fereshteh

doi:10.1007/s13738-014-0504-9

Cited by 13 publications

(3 citation statements)

References 30 publications

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“…374 The results have revealed that the combination of MIONs and semiconductors enables the exploration of novel functionalities derived from metal oxides. Various metal oxides are used for engineering iron oxide NPs and for forming composite NPs, such as TiO 2 , [375][376][377][378] ZnO, [379][380][381] SnO 2 , [382][383][384] MgO, 385 Y 2 O 3 , 386-388 WO 3 , 389 Cu 2 O, [390][391][392] and Al 2 O 3 . 393 Iron oxide NPs surface-engineered using a metal oxide can significantly increase the stability of iron oxide.…”

Section: Metal Oxidesmentioning

confidence: 99%

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

2016

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Iron oxide nanoparticles (NPs) hold great promise for future biomedical applications because of their magnetic properties as well as other intrinsic properties such as low toxicity, colloidal stability, and surface engineering capability. Numerous related studies on iron oxide NPs have been conducted. Recent progress in nanochemistry has enabled fine control over the size, crystallinity, uniformity, and surface properties of iron oxide NPs. This review examines various synthetic approaches and surface engineering strategies for preparing naked and functional iron oxide NPs with different physicochemical properties. Growing interest in designed and surface-engineered iron oxide NPs with multifunctionalities was explored in in vitro/in vivo biomedical applications, focusing on their combined roles in bioseparation, as a biosensor, targeted-drug delivery, MR contrast agents, and magnetic fluid hyperthermia. This review outlines the limitations of extant surface engineering strategies and several developing strategies that may overcome these limitations. This study also details the promising future directions of this active research field.

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Section: Metal Oxidesmentioning

confidence: 99%

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

2016

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“…The MgO shell acts as a shield for magnetic nanoparticles, preventing further oxidation and aggregation of the magnetic core. Notably, MgO stands out as a superior support compared to alternatives due to possessing Lewis acidic and Lewis basic sites, enabling stabilization of reaction intermediates during catalysis [39][40][41][42]. The integration of choline-based ionic liquid as a homogeneous catalyst with iron-magnesium oxide as a super-magnetic support facilitates the synthesis of highly active, multifunctional, and recyclable catalysts.…”

Section: Introductionmentioning

confidence: 99%

Modified nano magnetic Fe2O3-MgO as a high active multifunctional heterogeneous catalyst for environmentally beneficial carbon–carbon synthesis

Kamali,

Dreekvandy,

Mohammadkhani

et al. 2024

BMC Chemistry

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In this study, novel nanomagnetic catalysts, namely Fe2O3-MgO@choline formate (Ch. F.) and Fe2O3-MgO@choline cyanide (Ch. CN), were synthesized through immobilizing choline-based ion liquids to magnetic support via a simple and cost-effective methodology. FT-IR, TGA, FE-SEM, VSM, EDS, BET, and XRD techniques were employed to assess and characterize these organic–inorganic compounds. Following the successful preparation of nanoparticles, the catalysts were utilized in Knoevenagel and benzoin condensations. Fe2O3-MgO@Ch.F. exhibited exceptional activity in Knoevenagel condensation under solvent-free conditions at room temperature, achieving high yields (91–98%) in a short timeframe. Similarly, Fe2O3-MgO@Ch.CN demonstrated remarkable activity in benzoin condensation under environmentally friendly solvent conditions, yielding higher isolated yields (76–88%). Furthermore, these magnetically recyclable multifunctional catalysts displayed the ability to be reused up to five times without a significant loss in efficiency. Additionally, the heterogeneity of this nanocatalyst was investigated using the hot filtration technique. The findings indicated that the reaction primarily occurs via a heterogeneous pathway.

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“…Various synthetic methods have been described for the synthesis of racemic α-hydroxyphosphonates. − Beside these works, many researchers are challenging to obtain the enantiomerically pure forms by using various methods including asymmetric dihydroxylation of vinylphosphonates and hydrophosphonylation of aldehydes with asymmetric catalysts. To obtain optically active α-hydroxyphosphonates from the racemates, many works report the kinetic resolution of racemic α-hydroxyphosphonates by lipase-catalyzed acyl transfer reaction or hydrolysis reaction of their acyl counterpart. − However, the resolution of racemic α-hydoxyphosphonates with chemical resolving agents is rarely examined.…”

Section: Introductionmentioning

confidence: 99%

Resolution of Racemic α-Hydroxyphosphonates: Bi(OTf)₃-Catalyzed Stereoselective Esterification of α-Hydroxyphosphonates with (+)-Dibenzoyl-l-tartaric Anhydride

et al. 2019

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A practical and efficient method has been developed for the preparation of optically active α-hydroxyphosphonates through resolution of the racemates. Treatment of racemic diethyl 1-hydroxy-1-phenylmethylphosphonate (1) with (+)-dibenzoyl-L-tartaric anhydride gave two diastereomeric esters 2 and 3 in the presence of bismuth triflate (15 mol %) in an 86:14 ratio. The two diastereomeric esters were separated by simple column chromatography, and the structure for the major diastereomer was determined by X-ray crystallographic analysis. Simple hydrolysis of the isolated major diastereomer in the usual manner afforded (R)-O,O-diethyl-1-[hydroxyl(phenyl)methyl] phosphonate 1. The advantages of the present method are that the operation is simple and easy to handle, along with rapid and good yield preparations of both enantiomers of the racemic α-phosphonates 1. Diastereoselective reactions of various racemic α-hydroxyphosphonates with d-Bz-L-TA in the presence of Bi(OTf)3 are also described.

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MgO-coated-Fe3O4 nanoparticles as a magnetically recoverable and reusable catalyst for the synthesis of 1-hydroxyphosphonates

Cited by 13 publications

References 30 publications

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

Modified nano magnetic Fe2O3-MgO as a high active multifunctional heterogeneous catalyst for environmentally beneficial carbon–carbon synthesis

Resolution of Racemic α-Hydroxyphosphonates: Bi(OTf)₃-Catalyzed Stereoselective Esterification of α-Hydroxyphosphonates with (+)-Dibenzoyl-l-tartaric Anhydride

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MgO-coated-Fe3O4 nanoparticles as a magnetically recoverable and reusable catalyst for the synthesis of 1-hydroxyphosphonates

Cited by 13 publications

References 30 publications

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications

Modified nano magnetic Fe2O3-MgO as a high active multifunctional heterogeneous catalyst for environmentally beneficial carbon–carbon synthesis

Resolution of Racemic α-Hydroxyphosphonates: Bi(OTf)3-Catalyzed Stereoselective Esterification of α-Hydroxyphosphonates with (+)-Dibenzoyl-l-tartaric Anhydride

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Resolution of Racemic α-Hydroxyphosphonates: Bi(OTf)₃-Catalyzed Stereoselective Esterification of α-Hydroxyphosphonates with (+)-Dibenzoyl-l-tartaric Anhydride