safura zahedi - Academia.edu (original) (raw)
Papers by safura zahedi
Applied Organometallic Chemistry, Jun 11, 2015
l-Proline has been successfully anchored on the surface of magnetic nanoparticles and characteriz... more l-Proline has been successfully anchored on the surface of magnetic nanoparticles and characterized using powder X-ray diffraction, scanning electron microscopy, vibrating sample magnetometry and Fourier transform infrared spectroscopy. These nanoparticles as a chiral catalyst have been employed to promote the direct asymmetric Mannich reaction. The corresponding products are obtained in high yields with high level of diastereoselectivity (up to 99:1 dr) in the presence of Fe3O4– l-proline. Also this heterogeneous catalyst can be recovered easily and reused many times without significant loss of its catalytic activity. Copyright © 2015 John Wiley & Sons, Ltd.
Polycyclic Aromatic Compounds, Dec 12, 2016
An efficient, rapid, and energy-efficient approach to asymmetric Mannich reaction was developed u... more An efficient, rapid, and energy-efficient approach to asymmetric Mannich reaction was developed using different conditions such as ultrasonic and microwave irradiations in the presence of nano-Fe 3 O 4-L-proline as nanomagnetic organocatalyst. This work has been successful in achieving the comparison trend under different conditions. Good yields of the desired products were obtained by ultrasound-assisted reaction utilizing of Fe 3 O 4-L-proline NPs. The major advantages of this protocol are accessible conditions, easy work up, shorter reaction time, anti-selectivity, and higher yields in comparison with other methods.
Ultrasonics Sonochemistry, 2017
A family of novel ionic liquid with L-alanine and choline chloride as environmentally benign mate... more A family of novel ionic liquid with L-alanine and choline chloride as environmentally benign materials have been synthesized and grafted on Fe 3 O 4 nanoparticles using easy preparation techniques. The structure of ionic liquid supported on Fe 3 O 4 nanoparticles (IL-Fe 3 O 4 NPs) characterized by various analyses such as FE-SEM, EDX, XRD, NMR, FTIR and VSM. The catalytic activities of this catalyst are examined in the Mannich reaction for synthesis of β-aminocarbonyl compounds under ultrasonic irradiation. The recyclability of catalyst is investigated, and the results have indicated that the catalyst can be recycled six times without obvious activity decreasing.
iranian journal of catalysis, 2012
An efficient green route for the preparation of naphthoxazinones, applying a three-component one-... more An efficient green route for the preparation of naphthoxazinones, applying a three-component one-pot condensation reaction of 2-naphthol, aromatic aldehyde and urea in the presence of nano silica supported ferric chloride under solvent-free conditions has been developed. The present procedure offers several advantages such as short reaction time, simple workup, recovery and reusability of the catalyst.
ChemInform, Nov 6, 2014
AgI Nanoparticles as a Remarkable Catalyst in the Synthesis of (Amidoalkyl)naphthol and Oxazine D... more AgI Nanoparticles as a Remarkable Catalyst in the Synthesis of (Amidoalkyl)naphthol and Oxazine Derivatives: An Eco-Friendly Approach.-Facile and environmentally friendly routes for the synthesis of amidoalkylnaphthol (VII) and related oxazine derivatives [cf. (IX), (IV)] via AgI-catalyzed multicomponent reactions of -naphthol are developed.-(SAFAEI GHOMI*,
ChemInform, Jun 1, 2016
Diastereoselective Synthesis of β 2-Amino Acids.-A general route to β 2-amino acids is presented,... more Diastereoselective Synthesis of β 2-Amino Acids.-A general route to β 2-amino acids is presented, involving highly diastereoselective alkylation of a chiral sultam β-alaninate derivative (IV) as the key step. Alkylation must be performed below-45 • C to avoid elimination via ketene formation. β 2-Homophenylalanine (VI),-homoalanine (IXa) and-homoleucine derivatives (IXb) are prepared using this technique. Starting with (-)-sultam (II), the (R)-β 2-amino acids are obtained, while the corresponding (S)-enantiomers arise from (+)-sultam.-(
ChemInform, Aug 13, 2015
Copper Chromite Nanoparticles as an Efficient and Recyclable Catalyst for Facile Synthesis of 4,4... more Copper Chromite Nanoparticles as an Efficient and Recyclable Catalyst for Facile Synthesis of 4,4'-(Arylmethanediyl)bis(3-methyl-1H-pyrazol-5-ol) Derivatives.-The new methodology offers several advantages such as excellent yields, simple procedure, and mild conditions. The catalyst can be reused at least five times without any obvious change in its catalytic activity.-(SAFAEI-GHOMI*,
Journal of the Mexican chemical society, Oct 12, 2017
ZnO nanoparticles as a worthwhile and recyclable catalyst have been used for the one-pot synthesi... more ZnO nanoparticles as a worthwhile and recyclable catalyst have been used for the one-pot synthesis of 1,8-dioxo-decahydroacridines and 1,8-dioxooctahydro-xanthenes via multi-component reactions under solvent-free conditions. The presented method is mild, environmentally friendly, inexpensive and highly effective to give the products in good to excellent yields.
Synthesis and characterization of ionic liquid (IL) supported on Fe<sub>3</sub>O<s... more Synthesis and characterization of ionic liquid (IL) supported on Fe<sub>3</sub>O<sub>4</sub> nanoparticles and a DFT study of 1,3-dipolar cycloaddition for synthesis of isoxazolidines in the presence of IL-Fe<sub>3</sub>O<sub>4</sub>. A family of novel ionic liquid (IL) with L-alanine and choline chloride as environmentally benign materials has been synthesized and grafted on Fe<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) using easy preparation techniques. The structure of IL supported on Fe<sub>3</sub>O<sub>4</sub> NPs (IL-Fe<sub>3</sub>O<sub>4</sub> NPs) is characterized by various techniques such as field emission scanning electron microscopy (FE-SEM), Energy Dispersive X-Ray (EDX), XRD, Nuclear Magnetic Resonance (NMR), Fourier Transform Infrared (FTIR), and vibrating sample magnetometry (VSM). A stereoselective synthesis of isoxazolidine derivatives in good y...
iranian journal of catalysis, 2012
An efficient green route for the preparation of naphthoxazinones, applying a three-component one-... more An efficient green route for the preparation of naphthoxazinones, applying a three-component one-pot condensation reaction of 2-naphthol, aromatic aldehyde and urea in the presence of nano silica supported ferric chloride under solvent-free conditions has been developed. The present procedure offers several advantages such as short reaction time, simple workup, recovery and reusability of the catalyst.
Journal of the Mexican Chemical Society, 2017
ZnO nanoparticles as a worthwhile and recyclable catalyst have been used for the one-pot synthesi... more ZnO nanoparticles as a worthwhile and recyclable catalyst have been used for the one-pot synthesis of 1,8-dioxo-decahydroacridines and 1,8-dioxooctahydro-xanthenes via multi-component reactions under solvent-free conditions. The presented method is mild, environmentally friendly, inexpensive and highly effective to give the products in good to excellent yields.
Polycyclic Aromatic Compounds, 2018
GRAPHICAL ABSTRACT Synthesis and characterization of ionic liquid (IL) supported on Fe3O4 nanopar... more GRAPHICAL ABSTRACT Synthesis and characterization of ionic liquid (IL) supported on Fe3O4 nanoparticles and a DFT study of 1,3-dipolar cycloaddition for synthesis of isoxazolidines in the presence of IL-Fe3O4. ABSTRACT A family of novel ionic liquid (IL) with L-alanine and choline chloride as environmentally benign materials has been synthesized and grafted on Fe3O4 nanoparticles (NPs) using easy preparation techniques. The structure of IL supported on Fe3O4 NPs (IL-Fe3O4 NPs) is characterized by various techniques such as field emission scanning electron microscopy (FE-SEM), Energy Dispersive X-Ray (EDX), XRD, Nuclear Magnetic Resonance (NMR), Fourier Transform Infrared (FTIR), and vibrating sample magnetometry (VSM). A stereoselective synthesis of isoxazolidine derivatives in good yields, through a three-component 1,3-dipolar cycloaddition reaction using by IL-Fe3O4 NPs, is reported. The use of IL-Fe3O4 as a catalyst allowed us to prepare diastereoselective isoxazolidine derivatives. Conformational analysis compared with the 1H NMR data of the products obtained allowed us to determine the absolute configuration. In this paper, the density functional theory (DFT) method with 6-311G (d,p) basis set is employed for solution phase (solvent = CHCl3) of the isoxazolidine derivatives.
Ultrasonics Sonochemistry, 2018
Preparation of chitosan nanoparticles (CS-NPs) was examined from shrimp shells for their catalyti... more Preparation of chitosan nanoparticles (CS-NPs) was examined from shrimp shells for their catalytic activity. The yield of crude chitosan was 87.8%. The structure of chitosan nanoparticles was determined by FT-IR, SEM and XRD analysis. Then, diastereoselective synthesis of dihydropyrroles was done using chitosan nanoparticles in water under ultrasonic irradiation. This polymeric nanocatalyst could be used instead of the old toxic commercial organic basic catalysts and could be readily isolated from the reaction mixture and recycled several times without significant loss of catalytic activity.
Polycyclic Aromatic Compounds, 2016
An efficient, rapid, and energy-efficient approach to asymmetric Mannich reaction was developed u... more An efficient, rapid, and energy-efficient approach to asymmetric Mannich reaction was developed using different conditions such as ultrasonic and microwave irradiations in the presence of nano-Fe 3 O 4-L-proline as nanomagnetic organocatalyst. This work has been successful in achieving the comparison trend under different conditions. Good yields of the desired products were obtained by ultrasound-assisted reaction utilizing of Fe 3 O 4-L-proline NPs. The major advantages of this protocol are accessible conditions, easy work up, shorter reaction time, anti-selectivity, and higher yields in comparison with other methods.
Ultrasonics Sonochemistry, 2017
A family of novel ionic liquid with L-alanine and choline chloride as environmentally benign mate... more A family of novel ionic liquid with L-alanine and choline chloride as environmentally benign materials have been synthesized and grafted on Fe 3 O 4 nanoparticles using easy preparation techniques. The structure of ionic liquid supported on Fe 3 O 4 nanoparticles (IL-Fe 3 O 4 NPs) characterized by various analyses such as FE-SEM, EDX, XRD, NMR, FTIR and VSM. The catalytic activities of this catalyst are examined in the Mannich reaction for synthesis of β-aminocarbonyl compounds under ultrasonic irradiation. The recyclability of catalyst is investigated, and the results have indicated that the catalyst can be recycled six times without obvious activity decreasing.
Journal of Chemical Research, 2016
The efficient synthesis of eleven tetrahydrodipyrazolopyridines (two of which are novel) has been... more The efficient synthesis of eleven tetrahydrodipyrazolopyridines (two of which are novel) has been achieved by the multicomponent condensation reaction of ethyl acetoacetate, an araldehyde, hydrazine hydrate and ammonium acetate at room temperature in ethanol in the presence of nano-CuCr2O4. The key advantages of this process are good to high yields, short reaction times, practical simplicity, reusability of the catalyst and low catalyst loading.
Tetrahedron Letters, 2016
An efficient, one-pot, three-component protocol for the synthesis of a small library of chiral is... more An efficient, one-pot, three-component protocol for the synthesis of a small library of chiral isoxazolidines and spiroisoxazolidines with high diastereoselectivity, from the reaction of N-arylhydroxylamines, arylaldehydes, isatins and α,β-unsaturated aldehydes is described. L-Proline functionalized Fe 3 O 4 nanoparticles as a magnetic organocatalyst gave isoxazolidine products in high yields as single isomers with an endo-configuration. Notable features of this methodology were: short reaction time, good to excellent yields, and use of an easily recovered heterogeneous catalyst that could be reused many times without significant loss of its catalytic activity.
Zeitschrift für Naturforschung B, 2015
The ultrasound-assisted preparation of 2-(1H-tetrazol-5-yl) acrylonitrile derivatives via a one-p... more The ultrasound-assisted preparation of 2-(1H-tetrazol-5-yl) acrylonitrile derivatives via a one-pot multi-component method is described successfully using ZrP2O7 nanoparticles as a catalyst. Readily available tetrazoles can be transformed into the corresponding 1,5- and 2,5-disubstituted tetrazoles. 2,4′-Dibromoacetophenone gave the corresponding 2,5-disubstituted derivative as the only isomer. Synthesis of tetrazole derivatives with excellent yields in short times, a wide range of products under ultrasound irradiation, environmental benignity and a simple work-up procedure are some of the important features of this protocol.
![Research paper thumbnail of FeCl3.nano SiO2: An Efficient Heterogeneous Nano Catalyst for the Synthesis of 14-Aryl-14H-dibenzo[a,j]xanthenes and 1,8-Dioxo-octahydro-xanthenes under Solvent-free Conditions](https://attachments.academia-assets.com/118446449/thumbnails/1.jpg)
](South African journal of chemistry. Suid-Afrikaanse tydskrif vir chemie
A novel, efficient and eco-friendly procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthe... more A novel, efficient and eco-friendly procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydroxanthenes is described through one-pot condensation of 2-naphthol and dimedone with aryl aldehydes in the presence of nano silica-supported ferric chloride under solvent-free conditions. The present approach offers several advantages such as short reaction times, high yields, easy purification, recovery and reusability of the catalyst.
Applied Organometallic Chemistry, Jun 11, 2015
l-Proline has been successfully anchored on the surface of magnetic nanoparticles and characteriz... more l-Proline has been successfully anchored on the surface of magnetic nanoparticles and characterized using powder X-ray diffraction, scanning electron microscopy, vibrating sample magnetometry and Fourier transform infrared spectroscopy. These nanoparticles as a chiral catalyst have been employed to promote the direct asymmetric Mannich reaction. The corresponding products are obtained in high yields with high level of diastereoselectivity (up to 99:1 dr) in the presence of Fe3O4– l-proline. Also this heterogeneous catalyst can be recovered easily and reused many times without significant loss of its catalytic activity. Copyright © 2015 John Wiley & Sons, Ltd.
Polycyclic Aromatic Compounds, Dec 12, 2016
An efficient, rapid, and energy-efficient approach to asymmetric Mannich reaction was developed u... more An efficient, rapid, and energy-efficient approach to asymmetric Mannich reaction was developed using different conditions such as ultrasonic and microwave irradiations in the presence of nano-Fe 3 O 4-L-proline as nanomagnetic organocatalyst. This work has been successful in achieving the comparison trend under different conditions. Good yields of the desired products were obtained by ultrasound-assisted reaction utilizing of Fe 3 O 4-L-proline NPs. The major advantages of this protocol are accessible conditions, easy work up, shorter reaction time, anti-selectivity, and higher yields in comparison with other methods.
Ultrasonics Sonochemistry, 2017
A family of novel ionic liquid with L-alanine and choline chloride as environmentally benign mate... more A family of novel ionic liquid with L-alanine and choline chloride as environmentally benign materials have been synthesized and grafted on Fe 3 O 4 nanoparticles using easy preparation techniques. The structure of ionic liquid supported on Fe 3 O 4 nanoparticles (IL-Fe 3 O 4 NPs) characterized by various analyses such as FE-SEM, EDX, XRD, NMR, FTIR and VSM. The catalytic activities of this catalyst are examined in the Mannich reaction for synthesis of β-aminocarbonyl compounds under ultrasonic irradiation. The recyclability of catalyst is investigated, and the results have indicated that the catalyst can be recycled six times without obvious activity decreasing.
iranian journal of catalysis, 2012
An efficient green route for the preparation of naphthoxazinones, applying a three-component one-... more An efficient green route for the preparation of naphthoxazinones, applying a three-component one-pot condensation reaction of 2-naphthol, aromatic aldehyde and urea in the presence of nano silica supported ferric chloride under solvent-free conditions has been developed. The present procedure offers several advantages such as short reaction time, simple workup, recovery and reusability of the catalyst.
ChemInform, Nov 6, 2014
AgI Nanoparticles as a Remarkable Catalyst in the Synthesis of (Amidoalkyl)naphthol and Oxazine D... more AgI Nanoparticles as a Remarkable Catalyst in the Synthesis of (Amidoalkyl)naphthol and Oxazine Derivatives: An Eco-Friendly Approach.-Facile and environmentally friendly routes for the synthesis of amidoalkylnaphthol (VII) and related oxazine derivatives [cf. (IX), (IV)] via AgI-catalyzed multicomponent reactions of -naphthol are developed.-(SAFAEI GHOMI*,
ChemInform, Jun 1, 2016
Diastereoselective Synthesis of β 2-Amino Acids.-A general route to β 2-amino acids is presented,... more Diastereoselective Synthesis of β 2-Amino Acids.-A general route to β 2-amino acids is presented, involving highly diastereoselective alkylation of a chiral sultam β-alaninate derivative (IV) as the key step. Alkylation must be performed below-45 • C to avoid elimination via ketene formation. β 2-Homophenylalanine (VI),-homoalanine (IXa) and-homoleucine derivatives (IXb) are prepared using this technique. Starting with (-)-sultam (II), the (R)-β 2-amino acids are obtained, while the corresponding (S)-enantiomers arise from (+)-sultam.-(
ChemInform, Aug 13, 2015
Copper Chromite Nanoparticles as an Efficient and Recyclable Catalyst for Facile Synthesis of 4,4... more Copper Chromite Nanoparticles as an Efficient and Recyclable Catalyst for Facile Synthesis of 4,4'-(Arylmethanediyl)bis(3-methyl-1H-pyrazol-5-ol) Derivatives.-The new methodology offers several advantages such as excellent yields, simple procedure, and mild conditions. The catalyst can be reused at least five times without any obvious change in its catalytic activity.-(SAFAEI-GHOMI*,
Journal of the Mexican chemical society, Oct 12, 2017
ZnO nanoparticles as a worthwhile and recyclable catalyst have been used for the one-pot synthesi... more ZnO nanoparticles as a worthwhile and recyclable catalyst have been used for the one-pot synthesis of 1,8-dioxo-decahydroacridines and 1,8-dioxooctahydro-xanthenes via multi-component reactions under solvent-free conditions. The presented method is mild, environmentally friendly, inexpensive and highly effective to give the products in good to excellent yields.
Synthesis and characterization of ionic liquid (IL) supported on Fe<sub>3</sub>O<s... more Synthesis and characterization of ionic liquid (IL) supported on Fe<sub>3</sub>O<sub>4</sub> nanoparticles and a DFT study of 1,3-dipolar cycloaddition for synthesis of isoxazolidines in the presence of IL-Fe<sub>3</sub>O<sub>4</sub>. A family of novel ionic liquid (IL) with L-alanine and choline chloride as environmentally benign materials has been synthesized and grafted on Fe<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) using easy preparation techniques. The structure of IL supported on Fe<sub>3</sub>O<sub>4</sub> NPs (IL-Fe<sub>3</sub>O<sub>4</sub> NPs) is characterized by various techniques such as field emission scanning electron microscopy (FE-SEM), Energy Dispersive X-Ray (EDX), XRD, Nuclear Magnetic Resonance (NMR), Fourier Transform Infrared (FTIR), and vibrating sample magnetometry (VSM). A stereoselective synthesis of isoxazolidine derivatives in good y...
iranian journal of catalysis, 2012
An efficient green route for the preparation of naphthoxazinones, applying a three-component one-... more An efficient green route for the preparation of naphthoxazinones, applying a three-component one-pot condensation reaction of 2-naphthol, aromatic aldehyde and urea in the presence of nano silica supported ferric chloride under solvent-free conditions has been developed. The present procedure offers several advantages such as short reaction time, simple workup, recovery and reusability of the catalyst.
Journal of the Mexican Chemical Society, 2017
ZnO nanoparticles as a worthwhile and recyclable catalyst have been used for the one-pot synthesi... more ZnO nanoparticles as a worthwhile and recyclable catalyst have been used for the one-pot synthesis of 1,8-dioxo-decahydroacridines and 1,8-dioxooctahydro-xanthenes via multi-component reactions under solvent-free conditions. The presented method is mild, environmentally friendly, inexpensive and highly effective to give the products in good to excellent yields.
Polycyclic Aromatic Compounds, 2018
GRAPHICAL ABSTRACT Synthesis and characterization of ionic liquid (IL) supported on Fe3O4 nanopar... more GRAPHICAL ABSTRACT Synthesis and characterization of ionic liquid (IL) supported on Fe3O4 nanoparticles and a DFT study of 1,3-dipolar cycloaddition for synthesis of isoxazolidines in the presence of IL-Fe3O4. ABSTRACT A family of novel ionic liquid (IL) with L-alanine and choline chloride as environmentally benign materials has been synthesized and grafted on Fe3O4 nanoparticles (NPs) using easy preparation techniques. The structure of IL supported on Fe3O4 NPs (IL-Fe3O4 NPs) is characterized by various techniques such as field emission scanning electron microscopy (FE-SEM), Energy Dispersive X-Ray (EDX), XRD, Nuclear Magnetic Resonance (NMR), Fourier Transform Infrared (FTIR), and vibrating sample magnetometry (VSM). A stereoselective synthesis of isoxazolidine derivatives in good yields, through a three-component 1,3-dipolar cycloaddition reaction using by IL-Fe3O4 NPs, is reported. The use of IL-Fe3O4 as a catalyst allowed us to prepare diastereoselective isoxazolidine derivatives. Conformational analysis compared with the 1H NMR data of the products obtained allowed us to determine the absolute configuration. In this paper, the density functional theory (DFT) method with 6-311G (d,p) basis set is employed for solution phase (solvent = CHCl3) of the isoxazolidine derivatives.
Ultrasonics Sonochemistry, 2018
Preparation of chitosan nanoparticles (CS-NPs) was examined from shrimp shells for their catalyti... more Preparation of chitosan nanoparticles (CS-NPs) was examined from shrimp shells for their catalytic activity. The yield of crude chitosan was 87.8%. The structure of chitosan nanoparticles was determined by FT-IR, SEM and XRD analysis. Then, diastereoselective synthesis of dihydropyrroles was done using chitosan nanoparticles in water under ultrasonic irradiation. This polymeric nanocatalyst could be used instead of the old toxic commercial organic basic catalysts and could be readily isolated from the reaction mixture and recycled several times without significant loss of catalytic activity.
Polycyclic Aromatic Compounds, 2016
An efficient, rapid, and energy-efficient approach to asymmetric Mannich reaction was developed u... more An efficient, rapid, and energy-efficient approach to asymmetric Mannich reaction was developed using different conditions such as ultrasonic and microwave irradiations in the presence of nano-Fe 3 O 4-L-proline as nanomagnetic organocatalyst. This work has been successful in achieving the comparison trend under different conditions. Good yields of the desired products were obtained by ultrasound-assisted reaction utilizing of Fe 3 O 4-L-proline NPs. The major advantages of this protocol are accessible conditions, easy work up, shorter reaction time, anti-selectivity, and higher yields in comparison with other methods.
Ultrasonics Sonochemistry, 2017
A family of novel ionic liquid with L-alanine and choline chloride as environmentally benign mate... more A family of novel ionic liquid with L-alanine and choline chloride as environmentally benign materials have been synthesized and grafted on Fe 3 O 4 nanoparticles using easy preparation techniques. The structure of ionic liquid supported on Fe 3 O 4 nanoparticles (IL-Fe 3 O 4 NPs) characterized by various analyses such as FE-SEM, EDX, XRD, NMR, FTIR and VSM. The catalytic activities of this catalyst are examined in the Mannich reaction for synthesis of β-aminocarbonyl compounds under ultrasonic irradiation. The recyclability of catalyst is investigated, and the results have indicated that the catalyst can be recycled six times without obvious activity decreasing.
Journal of Chemical Research, 2016
The efficient synthesis of eleven tetrahydrodipyrazolopyridines (two of which are novel) has been... more The efficient synthesis of eleven tetrahydrodipyrazolopyridines (two of which are novel) has been achieved by the multicomponent condensation reaction of ethyl acetoacetate, an araldehyde, hydrazine hydrate and ammonium acetate at room temperature in ethanol in the presence of nano-CuCr2O4. The key advantages of this process are good to high yields, short reaction times, practical simplicity, reusability of the catalyst and low catalyst loading.
Tetrahedron Letters, 2016
An efficient, one-pot, three-component protocol for the synthesis of a small library of chiral is... more An efficient, one-pot, three-component protocol for the synthesis of a small library of chiral isoxazolidines and spiroisoxazolidines with high diastereoselectivity, from the reaction of N-arylhydroxylamines, arylaldehydes, isatins and α,β-unsaturated aldehydes is described. L-Proline functionalized Fe 3 O 4 nanoparticles as a magnetic organocatalyst gave isoxazolidine products in high yields as single isomers with an endo-configuration. Notable features of this methodology were: short reaction time, good to excellent yields, and use of an easily recovered heterogeneous catalyst that could be reused many times without significant loss of its catalytic activity.
Zeitschrift für Naturforschung B, 2015
The ultrasound-assisted preparation of 2-(1H-tetrazol-5-yl) acrylonitrile derivatives via a one-p... more The ultrasound-assisted preparation of 2-(1H-tetrazol-5-yl) acrylonitrile derivatives via a one-pot multi-component method is described successfully using ZrP2O7 nanoparticles as a catalyst. Readily available tetrazoles can be transformed into the corresponding 1,5- and 2,5-disubstituted tetrazoles. 2,4′-Dibromoacetophenone gave the corresponding 2,5-disubstituted derivative as the only isomer. Synthesis of tetrazole derivatives with excellent yields in short times, a wide range of products under ultrasound irradiation, environmental benignity and a simple work-up procedure are some of the important features of this protocol.
South African journal of chemistry. Suid-Afrikaanse tydskrif vir chemie
A novel, efficient and eco-friendly procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthe... more A novel, efficient and eco-friendly procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydroxanthenes is described through one-pot condensation of 2-naphthol and dimedone with aryl aldehydes in the presence of nano silica-supported ferric chloride under solvent-free conditions. The present approach offers several advantages such as short reaction times, high yields, easy purification, recovery and reusability of the catalyst.