An efficient and convenient one-pot two-step process for the regioselective synthesis of the nove... more An efficient and convenient one-pot two-step process for the regioselective synthesis of the novel tricyclic system 2-chloro-4-methyl-5,6-dihydrobenzo[<i>b</i>]pyrimido[5,4-<i>f</i>][1,4] oxazepine has been described <i>via</i> heterocyclization of 5-(chloromethyl)-2,4-dichloro-6-methylpyrimidine and 2-aminophenol under mild condition followed by reaction with the various secondary amine in moderate to good yields and short time (<b>4a-f</b>).
A novel heteropolyacid supported on silica coated nickel ferrite nanoparticles (NFS–PMA) was synt... more A novel heteropolyacid supported on silica coated nickel ferrite nanoparticles (NFS–PMA) was synthesized and used as a green catalyst for one-pot syntheses of tri/tetra-substituted imidazoles. The catalyst could be recycled and reused through application of a magnetic field.
International Communications in Heat and Mass Transfer, Nov 1, 2019
Abstract Two structures of carbon-based materials with sp2-hybridized are carbon nanotubes and gr... more Abstract Two structures of carbon-based materials with sp2-hybridized are carbon nanotubes and graphene arrayed in the concentric tube and two-dimensional sheet, respectively. The most important problems of graphene and carbon nanotube for use in various applications are insufficient dispersibility and their inadequate stability in different organic and aqueous solvents. The low interaction with other materials is second category problems of carbon nanostructures. Functionalization, a common method suggested by numerous researchers, can be employed to enhance this property. In this regard, the nanofluids containing graphene nanoplatelets and carboxylated multi-walled carbon nanotube were synthesized and dispersed in deionized water to prepare homogeneous samples of 0.1 and 0.2 wt%. The stability dependency of samples was investigated, for the first time, on ultrasonic time and microwave irradiation. Thermophysical properties including shear stress, viscosity, surface tension, density and stability were also measured and reported.
Abstract Aspartic acid as a hydrophilic group is added to the main structure of multi-walled carb... more Abstract Aspartic acid as a hydrophilic group is added to the main structure of multi-walled carbon nanotubes (MWNT) for synthesizing highly-dispersed MWNT-based water nanofluids with different concentrations. Chemical treatment is analyzed and functionalization is confirmed by TGA, FTIR, Raman spectroscopes. The present study is followed by investigation of thermo-physical properties as well as heat transfer rate of circular tube at constant heat flux in the presence of non-covalently and covalently-functionalized MWNT with aspartic acid. The prepared nanofluids in three weight concentrations of 0.05%, 0.1% and 0.2% are investigated in the flow rate range of 2.86–8.85 ml/s. Thermophysical properties, convective heat transfer coefficient, pressure drop, friction factor, performance index and pumping power results suggest that functionalized MWNT with aspartic acid is one of the most appropriate alternative coolant for water in industry.
In this study, a series of mono‐ and diallylphenol derivative were designed, synthesized, and eva... more In this study, a series of mono‐ and diallylphenol derivative were designed, synthesized, and evaluated as potential human 15‐lipoxygenase‐1 (15‐hLOX‐1) inhibitors. Radical scavenging potency of the synthetic allylphenol derivatives was assessed and the results were in accordance with lipoxygenase (LOX) inhibition potency. It was found that the electronic natures of allyl moiety and para substituents play the main role in radical scavenging activity and subsequently LOX inhibition potency of the synthetic inhibitors. Among the synthetic compounds, 2,6‐diallyl‐4‐(hexyloxy)phenol (42) and 2,6‐diallyl‐4‐aminophenol (47) showed the best results for LOX inhibition (IC50 = 0.88 and 0.80 μM, respectively).
Today, due to the developing need for inexpensive catalysts, recyclable magnetic nanocatalysts im... more Today, due to the developing need for inexpensive catalysts, recyclable magnetic nanocatalysts immobilized on polysaccharides possess many advantages over classical heterogeneous catalysts.
A new and efficient method has been developed for click chemistry reactions using a bifunctional ... more A new and efficient method has been developed for click chemistry reactions using a bifunctional Fe3O4@NFC-ImSalophCu catalyst with part imidazolium under moderate conditions.
The oxazolopyrimidine ring formation is carried out through treatment of aminopyrimidine (I) with... more The oxazolopyrimidine ring formation is carried out through treatment of aminopyrimidine (I) with various carboxylic acids.
An efficient and convenient one-pot two-step process for the regioselective synthesis of the nove... more An efficient and convenient one-pot two-step process for the regioselective synthesis of the novel tricyclic system 2-chloro-4-methyl-5,6-dihydrobenzo[<i>b</i>]pyrimido[5,4-<i>f</i>][1,4] oxazepine has been described <i>via</i> heterocyclization of 5-(chloromethyl)-2,4-dichloro-6-methylpyrimidine and 2-aminophenol under mild condition followed by reaction with the various secondary amine in moderate to good yields and short time (<b>4a-f</b>).
A novel heteropolyacid supported on silica coated nickel ferrite nanoparticles (NFS–PMA) was synt... more A novel heteropolyacid supported on silica coated nickel ferrite nanoparticles (NFS–PMA) was synthesized and used as a green catalyst for one-pot syntheses of tri/tetra-substituted imidazoles. The catalyst could be recycled and reused through application of a magnetic field.
International Communications in Heat and Mass Transfer, Nov 1, 2019
Abstract Two structures of carbon-based materials with sp2-hybridized are carbon nanotubes and gr... more Abstract Two structures of carbon-based materials with sp2-hybridized are carbon nanotubes and graphene arrayed in the concentric tube and two-dimensional sheet, respectively. The most important problems of graphene and carbon nanotube for use in various applications are insufficient dispersibility and their inadequate stability in different organic and aqueous solvents. The low interaction with other materials is second category problems of carbon nanostructures. Functionalization, a common method suggested by numerous researchers, can be employed to enhance this property. In this regard, the nanofluids containing graphene nanoplatelets and carboxylated multi-walled carbon nanotube were synthesized and dispersed in deionized water to prepare homogeneous samples of 0.1 and 0.2 wt%. The stability dependency of samples was investigated, for the first time, on ultrasonic time and microwave irradiation. Thermophysical properties including shear stress, viscosity, surface tension, density and stability were also measured and reported.
Abstract Aspartic acid as a hydrophilic group is added to the main structure of multi-walled carb... more Abstract Aspartic acid as a hydrophilic group is added to the main structure of multi-walled carbon nanotubes (MWNT) for synthesizing highly-dispersed MWNT-based water nanofluids with different concentrations. Chemical treatment is analyzed and functionalization is confirmed by TGA, FTIR, Raman spectroscopes. The present study is followed by investigation of thermo-physical properties as well as heat transfer rate of circular tube at constant heat flux in the presence of non-covalently and covalently-functionalized MWNT with aspartic acid. The prepared nanofluids in three weight concentrations of 0.05%, 0.1% and 0.2% are investigated in the flow rate range of 2.86–8.85 ml/s. Thermophysical properties, convective heat transfer coefficient, pressure drop, friction factor, performance index and pumping power results suggest that functionalized MWNT with aspartic acid is one of the most appropriate alternative coolant for water in industry.
In this study, a series of mono‐ and diallylphenol derivative were designed, synthesized, and eva... more In this study, a series of mono‐ and diallylphenol derivative were designed, synthesized, and evaluated as potential human 15‐lipoxygenase‐1 (15‐hLOX‐1) inhibitors. Radical scavenging potency of the synthetic allylphenol derivatives was assessed and the results were in accordance with lipoxygenase (LOX) inhibition potency. It was found that the electronic natures of allyl moiety and para substituents play the main role in radical scavenging activity and subsequently LOX inhibition potency of the synthetic inhibitors. Among the synthetic compounds, 2,6‐diallyl‐4‐(hexyloxy)phenol (42) and 2,6‐diallyl‐4‐aminophenol (47) showed the best results for LOX inhibition (IC50 = 0.88 and 0.80 μM, respectively).
Today, due to the developing need for inexpensive catalysts, recyclable magnetic nanocatalysts im... more Today, due to the developing need for inexpensive catalysts, recyclable magnetic nanocatalysts immobilized on polysaccharides possess many advantages over classical heterogeneous catalysts.
A new and efficient method has been developed for click chemistry reactions using a bifunctional ... more A new and efficient method has been developed for click chemistry reactions using a bifunctional Fe3O4@NFC-ImSalophCu catalyst with part imidazolium under moderate conditions.
The oxazolopyrimidine ring formation is carried out through treatment of aminopyrimidine (I) with... more The oxazolopyrimidine ring formation is carried out through treatment of aminopyrimidine (I) with various carboxylic acids.
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Papers by Hossein Eshghi