Nano-sized protonated ZSM–5 ( H-ZSM-5nanozeolite) was successfully synthesized by the hydrotherma... more Nano-sized protonated ZSM–5 ( H-ZSM-5nanozeolite) was successfully synthesized by the hydrothermal method using the bagasse ash (BGA) as a new silica source. Cultivated BGA in the south of the Caspian Sea (Mazandaran province, Iran) was used for extracting silica powder. H-ZSM-5 was characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electronic microscopy (SEM) and Brunauer–Emmett–Teller (BET), Barrett-Joyner-Halenda (BJH) techniques. The catalytic activity of H-ZSM-5 nanozeolite was evaluated for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones via one-pot threecomponent reaction of aromatic aldehydes, 2-aminobenzothiazole or 2-aminobenzimidazole and isatoic anhydride under solventfree conditions. Short reaction time, high yields, a simple experimental procedure in the absence of any toxic solvents and recovery of catalyst are the advantages of this protocol.
Silica ammonium acetate (SiO2-NH4OAc) was applied as an inexpensive, practical and heterogeneous ... more Silica ammonium acetate (SiO2-NH4OAc) was applied as an inexpensive, practical and heterogeneous catalyst for the preparation of new and known dihydropyrazolo[4',3':5,6]pyrano[2,3-d]pyrimidine-5,7-diones via one-pot four-component reaction of hydrazine hydrate, ethyl acetoacetate aldehydes and barbituric acid/dimethyl barbituric acid under solvent-free conditions. Silica supported ammonium acetate (SiO2-NH4OAc) was prepared according to easy procedure under ambient condition. After completion of the reaction, the catalyst was separated by filtration and reused. So, recycling system, simple work-up, using non-toxic materials, excellent yields and short reaction times makes our research green and convenient for preparation of these classes of organic compounds.
Saponin was extracted from the Anabasis setifera plant and used to stabilize an oil-in-water (O/W... more Saponin was extracted from the Anabasis setifera plant and used to stabilize an oil-in-water (O/W) emulsion based on date palm kernel oil. Different amounts of the extracted saponin were used with a constant oil concentration (1.5% w/w). The droplet size distribution, emulsion droplet size value (d-ave), polydispersity index (PDI) and zeta potential of the emulsions were determined using dynamic light scattering (DLS). These parameters were measured and compared after seven days of emulsion preparation. The best results (d-ave = 41.7 nm, PDI = 0.1 and zeta potential = −29.8 mV) were obtained for the CMC of saponin. Both the oil and the surfactant were specifically extracted and used from the nature of Saravan in the Baluchestan region of Iran. This research presents a green and cost-effective aspect for potential formulations of nano-emulsions that can be used in the food and cosmetic industries.
The Knoevenagel condensation reaction of aromatic aldehydes with malononitrile or dimedone was
in... more The Knoevenagel condensation reaction of aromatic aldehydes with malononitrile or dimedone was investigated. Also, the three-component and one-pot synthesis of 2-amino-5-oxo-4-aryl-4,5-dihydropyrano [3,2-c]chromene-3-carbonitrile derivatives by condensing 4-hydroxycoumarin, aldehydes and malononitriles using a catalytic amount of 2-hydroxyethylammonium formate as an effective ionic liquid without using any additional co-catalyst under solvent-free conditions at room temperature is reported. Furthermore, the domino Knoevenagel condensation, conjugate addition, and cyclization for the preparation of tetrahydrobenzo[ b]pyran, and spirooxindole derivatives in high atomic efficiency take place in excellent yields
... Mild Conditions HAMID REZA SHATERIAN*, FATEMEH RIGI and MADIHE ARMAN Department of ... 27-32.... more ... Mild Conditions HAMID REZA SHATERIAN*, FATEMEH RIGI and MADIHE ARMAN Department of ... 27-32. 7. Oskooie HA, Heravi MM, Tahershamsi L, Sadjadi S and Tajbakhsh M, Synth Commun., 2010, 3, 1772-1777. 8. Shelke ...
Nano-sized protonated ZSM–5 ( H-ZSM-5nanozeolite) was successfully synthesized by the hydrotherma... more Nano-sized protonated ZSM–5 ( H-ZSM-5nanozeolite) was successfully synthesized by the hydrothermal method using the bagasse ash (BGA) as a new silica source. Cultivated BGA in the south of the Caspian Sea (Mazandaran province, Iran) was used for extracting silica powder. H-ZSM-5 was characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electronic microscopy (SEM) and Brunauer–Emmett–Teller (BET), Barrett-Joyner-Halenda (BJH) techniques. The catalytic activity of H-ZSM-5 nanozeolite was evaluated for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones via one-pot threecomponent reaction of aromatic aldehydes, 2-aminobenzothiazole or 2-aminobenzimidazole and isatoic anhydride under solventfree conditions. Short reaction time, high yields, a simple experimental procedure in the absence of any toxic solvents and recovery of catalyst are the advantages of this protocol.
Silica ammonium acetate (SiO2-NH4OAc) was applied as an inexpensive, practical and heterogeneous ... more Silica ammonium acetate (SiO2-NH4OAc) was applied as an inexpensive, practical and heterogeneous catalyst for the preparation of new and known dihydropyrazolo[4',3':5,6]pyrano[2,3-d]pyrimidine-5,7-diones via one-pot four-component reaction of hydrazine hydrate, ethyl acetoacetate aldehydes and barbituric acid/dimethyl barbituric acid under solvent-free conditions. Silica supported ammonium acetate (SiO2-NH4OAc) was prepared according to easy procedure under ambient condition. After completion of the reaction, the catalyst was separated by filtration and reused. So, recycling system, simple work-up, using non-toxic materials, excellent yields and short reaction times makes our research green and convenient for preparation of these classes of organic compounds.
Saponin was extracted from the Anabasis setifera plant and used to stabilize an oil-in-water (O/W... more Saponin was extracted from the Anabasis setifera plant and used to stabilize an oil-in-water (O/W) emulsion based on date palm kernel oil. Different amounts of the extracted saponin were used with a constant oil concentration (1.5% w/w). The droplet size distribution, emulsion droplet size value (d-ave), polydispersity index (PDI) and zeta potential of the emulsions were determined using dynamic light scattering (DLS). These parameters were measured and compared after seven days of emulsion preparation. The best results (d-ave = 41.7 nm, PDI = 0.1 and zeta potential = −29.8 mV) were obtained for the CMC of saponin. Both the oil and the surfactant were specifically extracted and used from the nature of Saravan in the Baluchestan region of Iran. This research presents a green and cost-effective aspect for potential formulations of nano-emulsions that can be used in the food and cosmetic industries.
The Knoevenagel condensation reaction of aromatic aldehydes with malononitrile or dimedone was
in... more The Knoevenagel condensation reaction of aromatic aldehydes with malononitrile or dimedone was investigated. Also, the three-component and one-pot synthesis of 2-amino-5-oxo-4-aryl-4,5-dihydropyrano [3,2-c]chromene-3-carbonitrile derivatives by condensing 4-hydroxycoumarin, aldehydes and malononitriles using a catalytic amount of 2-hydroxyethylammonium formate as an effective ionic liquid without using any additional co-catalyst under solvent-free conditions at room temperature is reported. Furthermore, the domino Knoevenagel condensation, conjugate addition, and cyclization for the preparation of tetrahydrobenzo[ b]pyran, and spirooxindole derivatives in high atomic efficiency take place in excellent yields
... Mild Conditions HAMID REZA SHATERIAN*, FATEMEH RIGI and MADIHE ARMAN Department of ... 27-32.... more ... Mild Conditions HAMID REZA SHATERIAN*, FATEMEH RIGI and MADIHE ARMAN Department of ... 27-32. 7. Oskooie HA, Heravi MM, Tahershamsi L, Sadjadi S and Tajbakhsh M, Synth Commun., 2010, 3, 1772-1777. 8. Shelke ...
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Papers by fatemeh Rigi
investigated. Also, the three-component and one-pot synthesis of 2-amino-5-oxo-4-aryl-4,5-dihydropyrano
[3,2-c]chromene-3-carbonitrile derivatives by condensing 4-hydroxycoumarin, aldehydes and malononitriles
using a catalytic amount of 2-hydroxyethylammonium formate as an effective ionic liquid without using any
additional co-catalyst under solvent-free conditions at room temperature is reported. Furthermore, the
domino Knoevenagel condensation, conjugate addition, and cyclization for the preparation of tetrahydrobenzo[
b]pyran, and spirooxindole derivatives in high atomic efficiency take place in excellent yields
investigated. Also, the three-component and one-pot synthesis of 2-amino-5-oxo-4-aryl-4,5-dihydropyrano
[3,2-c]chromene-3-carbonitrile derivatives by condensing 4-hydroxycoumarin, aldehydes and malononitriles
using a catalytic amount of 2-hydroxyethylammonium formate as an effective ionic liquid without using any
additional co-catalyst under solvent-free conditions at room temperature is reported. Furthermore, the
domino Knoevenagel condensation, conjugate addition, and cyclization for the preparation of tetrahydrobenzo[
b]pyran, and spirooxindole derivatives in high atomic efficiency take place in excellent yields