Synthesis of Spiro1,4–Dihydropyridines: A Review

The preparation of medicinally promising spiro1,4–dihydropyridines accompanied by their applications in biological and pharmaceutical activities is presented. Spiro1,4–dihydropyridines were synthesized using numerous reported methods including bronested acids such as p-TSA, AcOH, nano-ranged calix[4]arene tetracarboxylic acid, sulfamic acid, PEG-OSO3H, tetramethylguanidinium triflate; lewis acids including Zn(OTf)2, FeCl3, copper, alum, aluminosilicate nanoparticles, MnFe2O4 nanoparticles, manganese ferrite nanoparticles, BF3OEt2; under alkaline conditions such as Et3N and piperidine; ionic liquids such as [KAl(SO4)2·12H2O] and [Bmim]PF6, [MIM(CH2)4SO3H][HSO4]; and other miscellaneous procedures, for example, microwave-assisted catalyst and solvent-free conditions, using iodine, PEG-400, and NaCl.

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Synthesis and Characterization of Electrochemical Properties of Manganese Ferrite Nanoparticles (\ce {MnFe2O4}) from Iron

Omega Jurnal Fisika dan Pendidikan Fisika ◽

10.31758/omegajphysphyseduc.v5i1.15 ◽

2019 ◽

Vol 5 (1) ◽

pp. 15

Author(s):

Sadang Husain ◽

Muhammad Irfansyah ◽

Agus Riyanto ◽

Sugianto Arjo

Keyword(s):

Electrochemical Properties ◽

Glucose Oxidase ◽

Iron Ore ◽

Ferrite Nanoparticles ◽

Electrochemical Characterization ◽

Precipitation Method ◽

Synthesis And Characterization ◽

Manganese Ferrite ◽

Mnfe2o4 Nanoparticles

Synthesis and characterization of the electrochemical properties of manganese ferrite nanoparticles (\ce {MnFe2O4}) from iron ore have been done. The aim of this research was to determine the potential of iron ore as a source for the manufacture of \ce {MnFe2O4} and to know electrochemical characterization. The precipitation method was used in this research. Iron ore samples were taken from Tanah Laut Regency, South Kalimantan, Indonesia. The sample of iron ore was purified first to synthesis MnFe2O4 nanoparticle. Manganese salt \ce {MnCl2} is used as a source of manganese. Characterization of samples use TEM and potentiostat. Glucose oxidase (GOD) is used as a sample to be given electrochemical properties of the sample. The GOD concentration used is 0.2; 0.4; 0.6; and 0.8 ppm. The range of \ce {MnFe2O4} nanoparticles was successfully made with sample diameters ranging from 1.5 to 12.5 nm. The current values obtained on \ce {MnFe2O4} nanoparticles range from $0.226 - 0.322$ mA. The sensitivity of \ce {MnFe2O4} nanoparticles is around 0.16 mA/ppm. The higher the concentration used, the greater the current produced.

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Manganese Ferrite Nanoparticles Encapsulated into Vitamin E/Sphingomyelin Nanoemulsions as Contrast Agents for High‐Sensitive Magnetic Resonance Imaging

Advanced Healthcare Materials ◽

10.1002/adhm.202101019 ◽

2021 ◽

pp. 2101019

Author(s):

Sandra Díez‐Villares ◽

Miguel A. Ramos‐Docampo ◽

Andrés da Silva‐Candal ◽

Pablo Hervella ◽

Abi J. Vázquez‐Ríos ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Vitamin E ◽

Magnetic Resonance ◽

Contrast Agents ◽

Ferrite Nanoparticles ◽

Manganese Ferrite ◽

Resonance Imaging

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Microwave-Assisted Efficient, One-Pot, Three-Component Synthesis of 3,5-Disubstituted 1,2,4-Oxadiazoles under Solvent-Free Conditions.

ChemInform ◽

10.1002/chin.200632158 ◽

2006 ◽

Vol 37 (32) ◽

Author(s):

Mehdi Adib ◽

Amin Haghighat Jahromi ◽

Narjes Tavoosi ◽

Mohammad Mahdavi ◽

Hamid Reza Bijanzadeh

Keyword(s):

Solvent Free ◽

One Pot ◽

Microwave Assisted ◽

Solvent Free Conditions

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Applicability of a carbon paste electrode modified with manganese ferrite nanoparticles (MnFe2O4NPs) in simultaneous measurement of uric acid and dopamine

Materials Today Communications ◽

10.1016/j.mtcomm.2021.102548 ◽

2021 ◽

pp. 102548

Author(s):

Ebrahim Naghian ◽

Zahra Mahmoodi ◽

Faezeh Shahdost-fard ◽

Fatemeh Nosratzehi ◽

Kourosh Adib ◽

...

Keyword(s):

Uric Acid ◽

Carbon Paste Electrode ◽

Simultaneous Measurement ◽

Ferrite Nanoparticles ◽

Manganese Ferrite ◽

Carbon Paste ◽

Paste Electrode

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Sulfamic acid pyromellitic diamide-functionalized MCM-41 as a multifunctional hybrid catalyst for melting-assisted solvent-free synthesis of bioactive 3,4-dihydropyrimidin-2-(1H)-ones

Scientific Reports ◽

10.1038/s41598-021-89572-y ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Ehsan Valiey ◽

Mohammad G. Dekamin ◽

Zahra Alirezvani

Keyword(s):

Structural Characteristics ◽

Biginelli Reaction ◽

High Surface ◽

High Surface Area ◽

Sulfamic Acid ◽

Solvent Free ◽

Biologically Active ◽

Green Protocol ◽

Solvent Free Conditions ◽

Mcm 41

AbstractThis study introduces a practical approach to fabricate a novel hybrid acidic catalyst, namely sulfamic acid pyromellitic diamide-functionalized MCM-41 (MCM-41-APS-PMDA-NHSO3H). Various techniques such as FTIR, TGA, XRD, BET, FESEM, and EDX were used to confirm its structural characteristics. The efficiency of the new MCM-41-APS-PMDA-NHSO3H organosilica nanomaterials, as a heterogenous nanocatalyst, was examined in the synthesis of biologically active 3,4-dihydropyrimidin-2-(1H)-one derivatives under solvent-free conditions. It was found that the nanoporous MCM-41-APS-PMDA-NHSO3H, demonstrating acidic nature and high surface area, can activate all the Biginelli reaction components to afford desired 3,4-dihydropyrimidin-2-(1H)-ones under solvent-free conditions in short reaction time. Furthermore, easy and quick isolation of the new introduced hybrid organosilica from the reaction mixture as well as its reusability with negligible loss of activity in at least five consecutive runs are another advantages of this green protocol.

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