Sami Sajjadifar | Payame Noor University (original) (raw)
Papers by Sami Sajjadifar
A simple, highly efficient and green procedure for the condensation of aryl and alkyl 1,2-diamine... more A simple, highly efficient and green procedure for the condensation of aryl and alkyl 1,2-diamines with α-diketones in the presence of catalytic amount of silica boron sulfonic acid (SBSA) at room temperature is described. By Using this method, quinoxaline derivatives as biologically interesting compounds are produced in high to excellent yields and short reaction times. Graphical Abstract S. S a j j a d i f a r P a g e | 2
In this work, the efficiency, generality and applicability of new silica supported Brønsted acidi... more In this work, the efficiency, generality and applicability of new silica
supported Brønsted acidic ionic liquid (BAIL) 1-methyl-3-(2-
(sulfooxy)ethyl)-1H-imidazol-3-ium chloride as heterogeneous and green
catalyst for organic transformations are studied. Herein, the following
one-pot multi-component reactions in the presence of [Msei]Cl are
investigated: (i) the synthesis of quinoxaline derivatives from
phenylendiamine and 1,2-diketones in EtOH and under mild conditions
(room temperature), (ii) the preparation of 1,4-dihydropyridines from
one-pot multi component condensation of 1,3-dicarbonyl compounds (2
equiv.), NH4OAc (1.5 equiv.) and aldehydes (1 equiv.) under solvent-free
conditions at moderate temperature (90 °C). High yields, relatively short
reaction times, efficiency, generality, clean process, simple methodology,
low cost, easy work-up, ease of preparation and regeneration of the
catalyst and green conditions (in the synthesis of the quinoxaline
derivatives) are advantages of the application of [Mesi]Cl as catalyst in
the above organic reactions.
Iranian Journal of Catalysis, 2014
Easily synthesized1-methyl-3-(2-oxyethyl)-1H-imidazol-3-ium-borate sulfonic acid {[MOEI]-BSA} as ... more Easily synthesized1-methyl-3-(2-oxyethyl)-1H-imidazol-3-ium-borate sulfonic acid {[MOEI]-BSA} as a novel catalyst efficiently promoted the synthesis of quinoxaline derivatives via condensation of various diamines with 1,2-dicarbonyl compounds at room temperature conditions in ethanol. This research provides a new method for the synthesis of quinoxalines in good to excellent yields with little catalyst loading. The catalyst could be recycled and reused several times without any loss of efficiency.
Keywords: [MOEI]-BSA, Quinoxaline synthesis, Solid acid, Green chemistry, Heterogeneous catalyst, Diamine, 1,2-Diketone.
Iranian Chemical Communication, 2014
An efficient synthetic method for successful application of amine denderon on SBA-15 and related ... more An efficient synthetic method for successful application of amine denderon on SBA-15 and related Pd (II) complex has been developed by employing aerobic oxidation of alcohols as model reactions. The yields of the products were in the range from 75% to 92%. The catalyst can be readily recovered and reused at least 5 consecutive cycles without significant leaching and loss its catalytic activity.
Chemical Science Transactions, 2014
A simple, highly efficient and green procedure for the condensation of aryl and alkyl 1,2-diamin... more A simple, highly efficient and green procedure for the condensation of aryl and alkyl
1,2-diamines with α-diketones in the presence of catalytic amount of sulfonic acid functionalized
imidazolium salts (SAFIS) is described. Using this method, quinoxaline derivatives as biologically
interesting compounds are produced in high to excellent yields and short reaction times.
Environmentally benign, simple methodologies, easy workup procedure, clean reaction, short
reaction time, high yield and easy preparation of the catalysts are some advantages of this work. In
this work, some sulfonic acid functionalized imidazolium salts (SAFIS), as a new category of ionic
liquids, are synthesized by eco-friendly and simple procedures, and used as highly efficient and
reusable catalysts to promote the following one-pot organic transformations under solvent-free
conditions.
Chemical Science Transactions, 2014
An efficient and simple method for the synthesis of xanthenes derivatives is described via one-p... more An efficient and simple method for the synthesis of xanthenes derivatives is described via
one-pot condensation of various aldehydes and 2-naphthol using [2-(sulfooxy)ethyl]sulfamic acid
(SESA) as a novel catalyst. Different types of aromatic aldehydes were used in the reaction and in
all cases the products synthesized successfully Use of easily available catalyst, time minimizing,
excellent yields, simplicity of the reaction, heterogeneous system, a cleaner reaction and easy workup
are the advantages of the present method.
Journal of Chemical Research, 2014
An efficient, simple and one-pot synthesis of pyrimidine derivatives by a three-component reactio... more An efficient, simple and one-pot synthesis of pyrimidine derivatives by a three-component reaction of ketones, triethyl
orthoformate, and ammonium acetate in the presence of boron sulfuric acid as a reusable and efficient catalyst under solventfree
conditions is reported. The reusability of catalyst, simplicity of the starting materials, short reaction time, one-pot, and
good yields of products are the main advantages.
Scientia Iranica, Dec 4, 2014
A green and simple procedure for the thiocyanation of aromatic and heteroaromaric compounds in t... more A green and simple procedure for the thiocyanation of aromatic and
heteroaromaric compounds in the presence of a catalytic amount of phthalic acid in
water/ethanol is described. The reactions proceed at high yields, short reaction times
and mild conditions.
A simple, highly efficient and green procedure for the condensation of o-phenylenediamine with α-... more A simple, highly efficient and green procedure for the condensation of o-phenylenediamine with α-diketones in the presence of catalytic quantity of phthalic acid(0.0083 g, 5mol%) at room temperature was done. Using this method, quinoxaline derivatives as biological fascinating compound are produced in good to excellent yields and short reaction times. Keywords:Quinoxaline, o-Phenylenediamine, α-Diketone, Phthalic acid, Green chemistry.
Chemical Papers, 2014
1,1-Diacetates derivatives were prepared using the direct condensation of aldehydes with acetic a... more 1,1-Diacetates derivatives were prepared using the direct condensation of aldehydes with acetic anhydride
in the presence of silica-supported boron sulfonic acid (SiO2/B(SO4H)3) as a tri-functional
inorganic Brønsted acid catalyst under solvent-free conditions at ambient temperature. The salient
features of this methodology are: (i) cheaper process ready availability of the catalyst; (ii) versatility;
(iii) high regio-selectivity of the procedure and recyclable property of the catalyst.
Scientia Iranica, 2014
Fe2+supported on hydroxyapatite- core-shell magnetic γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp- Fe2+ NPs... more Fe2+supported on hydroxyapatite- core-shell magnetic γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp- Fe2+ NPs) is reported as a novel, efficient, reusable and heterogeneous catalyst. In this protocol, we used this catalyst for the synthesis of 4-dihydropyrimidin-2(1H)-ones/thiones in good to high yields by the reaction of aromatic aldehyde, β-dicarbonyl and urea/thiourea under solvent free condition. The catalyst can be readily isolated by using an external magnet and no obvious loss of activity was observed when the catalyst was reused in seven consecutive runs. The mean size and the surface morphology of the nanoparticles were characterized by TEM, SEM, VSM, XRD and FTIR techniques.
Keywords: Magnetic nanoparticles, heterogeneous catalyst, solvent-free, Biginelli reaction, Fe2+ supported.
Scientia Iranica, Dec 4, 2014
New indolenines I(1-18) were prepared by Fischer indole synthetic reaction of hydrazines derivati... more New indolenines I(1-18) were prepared by Fischer indole synthetic reaction of hydrazines derivatives H(1-6) with isoproylmethylketone K1, 2-methylcyclohexanone K2 and diisopropyl ketone K3 in presence of citric acid as a new catalyst at reflux condition in high yield.
Molecules, 2010
The Molecular weight of any AB 2 type dendrimers were calculated by suggested theoretical equatio... more The Molecular weight of any AB 2 type dendrimers were calculated by suggested theoretical equation. The results were compared with the data reported by others. It was found that there are no remarkable differences between the calculated and reported data.
Polymer, 2009
Using of a Molecular equation of a first dendrimer surface and its relation to dendrimer molecula... more Using of a Molecular equation of a first dendrimer surface and its relation to dendrimer molecular radios, it is possible to suggest the number of generation. Whereas a relative molecular weight is affiliated to the number of molecule formed in structural cells and on the other hand, structural cells have definite and determined dimensions, so by a simple replacement, the dendrimer molecular weight was directly related to its generation number. Data analysis derived from specific equation was shown that the prediction of a dendrimer molecular weight may be applicable by a specific generation.
A simple, highly efficient and green procedure for the condensation of aryl and alkyl 1,2-diamine... more A simple, highly efficient and green procedure for the condensation of aryl and alkyl 1,2-diamines with α-diketones in the presence of catalytic amount of silica boron sulfonic acid (SBSA) at room temperature is described. By Using this method, quinoxaline derivatives as biologically interesting compounds are produced in high to excellent yields and short reaction times. Graphical Abstract S. S a j j a d i f a r P a g e | 2
In this work, the efficiency, generality and applicability of new silica supported Brønsted acidi... more In this work, the efficiency, generality and applicability of new silica
supported Brønsted acidic ionic liquid (BAIL) 1-methyl-3-(2-
(sulfooxy)ethyl)-1H-imidazol-3-ium chloride as heterogeneous and green
catalyst for organic transformations are studied. Herein, the following
one-pot multi-component reactions in the presence of [Msei]Cl are
investigated: (i) the synthesis of quinoxaline derivatives from
phenylendiamine and 1,2-diketones in EtOH and under mild conditions
(room temperature), (ii) the preparation of 1,4-dihydropyridines from
one-pot multi component condensation of 1,3-dicarbonyl compounds (2
equiv.), NH4OAc (1.5 equiv.) and aldehydes (1 equiv.) under solvent-free
conditions at moderate temperature (90 °C). High yields, relatively short
reaction times, efficiency, generality, clean process, simple methodology,
low cost, easy work-up, ease of preparation and regeneration of the
catalyst and green conditions (in the synthesis of the quinoxaline
derivatives) are advantages of the application of [Mesi]Cl as catalyst in
the above organic reactions.
Iranian Journal of Catalysis, 2014
Easily synthesized1-methyl-3-(2-oxyethyl)-1H-imidazol-3-ium-borate sulfonic acid {[MOEI]-BSA} as ... more Easily synthesized1-methyl-3-(2-oxyethyl)-1H-imidazol-3-ium-borate sulfonic acid {[MOEI]-BSA} as a novel catalyst efficiently promoted the synthesis of quinoxaline derivatives via condensation of various diamines with 1,2-dicarbonyl compounds at room temperature conditions in ethanol. This research provides a new method for the synthesis of quinoxalines in good to excellent yields with little catalyst loading. The catalyst could be recycled and reused several times without any loss of efficiency.
Keywords: [MOEI]-BSA, Quinoxaline synthesis, Solid acid, Green chemistry, Heterogeneous catalyst, Diamine, 1,2-Diketone.
Iranian Chemical Communication, 2014
An efficient synthetic method for successful application of amine denderon on SBA-15 and related ... more An efficient synthetic method for successful application of amine denderon on SBA-15 and related Pd (II) complex has been developed by employing aerobic oxidation of alcohols as model reactions. The yields of the products were in the range from 75% to 92%. The catalyst can be readily recovered and reused at least 5 consecutive cycles without significant leaching and loss its catalytic activity.
Chemical Science Transactions, 2014
A simple, highly efficient and green procedure for the condensation of aryl and alkyl 1,2-diamin... more A simple, highly efficient and green procedure for the condensation of aryl and alkyl
1,2-diamines with α-diketones in the presence of catalytic amount of sulfonic acid functionalized
imidazolium salts (SAFIS) is described. Using this method, quinoxaline derivatives as biologically
interesting compounds are produced in high to excellent yields and short reaction times.
Environmentally benign, simple methodologies, easy workup procedure, clean reaction, short
reaction time, high yield and easy preparation of the catalysts are some advantages of this work. In
this work, some sulfonic acid functionalized imidazolium salts (SAFIS), as a new category of ionic
liquids, are synthesized by eco-friendly and simple procedures, and used as highly efficient and
reusable catalysts to promote the following one-pot organic transformations under solvent-free
conditions.
Chemical Science Transactions, 2014
An efficient and simple method for the synthesis of xanthenes derivatives is described via one-p... more An efficient and simple method for the synthesis of xanthenes derivatives is described via
one-pot condensation of various aldehydes and 2-naphthol using [2-(sulfooxy)ethyl]sulfamic acid
(SESA) as a novel catalyst. Different types of aromatic aldehydes were used in the reaction and in
all cases the products synthesized successfully Use of easily available catalyst, time minimizing,
excellent yields, simplicity of the reaction, heterogeneous system, a cleaner reaction and easy workup
are the advantages of the present method.
Journal of Chemical Research, 2014
An efficient, simple and one-pot synthesis of pyrimidine derivatives by a three-component reactio... more An efficient, simple and one-pot synthesis of pyrimidine derivatives by a three-component reaction of ketones, triethyl
orthoformate, and ammonium acetate in the presence of boron sulfuric acid as a reusable and efficient catalyst under solventfree
conditions is reported. The reusability of catalyst, simplicity of the starting materials, short reaction time, one-pot, and
good yields of products are the main advantages.
Scientia Iranica, Dec 4, 2014
A green and simple procedure for the thiocyanation of aromatic and heteroaromaric compounds in t... more A green and simple procedure for the thiocyanation of aromatic and
heteroaromaric compounds in the presence of a catalytic amount of phthalic acid in
water/ethanol is described. The reactions proceed at high yields, short reaction times
and mild conditions.
A simple, highly efficient and green procedure for the condensation of o-phenylenediamine with α-... more A simple, highly efficient and green procedure for the condensation of o-phenylenediamine with α-diketones in the presence of catalytic quantity of phthalic acid(0.0083 g, 5mol%) at room temperature was done. Using this method, quinoxaline derivatives as biological fascinating compound are produced in good to excellent yields and short reaction times. Keywords:Quinoxaline, o-Phenylenediamine, α-Diketone, Phthalic acid, Green chemistry.
Chemical Papers, 2014
1,1-Diacetates derivatives were prepared using the direct condensation of aldehydes with acetic a... more 1,1-Diacetates derivatives were prepared using the direct condensation of aldehydes with acetic anhydride
in the presence of silica-supported boron sulfonic acid (SiO2/B(SO4H)3) as a tri-functional
inorganic Brønsted acid catalyst under solvent-free conditions at ambient temperature. The salient
features of this methodology are: (i) cheaper process ready availability of the catalyst; (ii) versatility;
(iii) high regio-selectivity of the procedure and recyclable property of the catalyst.
Scientia Iranica, 2014
Fe2+supported on hydroxyapatite- core-shell magnetic γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp- Fe2+ NPs... more Fe2+supported on hydroxyapatite- core-shell magnetic γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp- Fe2+ NPs) is reported as a novel, efficient, reusable and heterogeneous catalyst. In this protocol, we used this catalyst for the synthesis of 4-dihydropyrimidin-2(1H)-ones/thiones in good to high yields by the reaction of aromatic aldehyde, β-dicarbonyl and urea/thiourea under solvent free condition. The catalyst can be readily isolated by using an external magnet and no obvious loss of activity was observed when the catalyst was reused in seven consecutive runs. The mean size and the surface morphology of the nanoparticles were characterized by TEM, SEM, VSM, XRD and FTIR techniques.
Keywords: Magnetic nanoparticles, heterogeneous catalyst, solvent-free, Biginelli reaction, Fe2+ supported.
Scientia Iranica, Dec 4, 2014
New indolenines I(1-18) were prepared by Fischer indole synthetic reaction of hydrazines derivati... more New indolenines I(1-18) were prepared by Fischer indole synthetic reaction of hydrazines derivatives H(1-6) with isoproylmethylketone K1, 2-methylcyclohexanone K2 and diisopropyl ketone K3 in presence of citric acid as a new catalyst at reflux condition in high yield.
Molecules, 2010
The Molecular weight of any AB 2 type dendrimers were calculated by suggested theoretical equatio... more The Molecular weight of any AB 2 type dendrimers were calculated by suggested theoretical equation. The results were compared with the data reported by others. It was found that there are no remarkable differences between the calculated and reported data.
Polymer, 2009
Using of a Molecular equation of a first dendrimer surface and its relation to dendrimer molecula... more Using of a Molecular equation of a first dendrimer surface and its relation to dendrimer molecular radios, it is possible to suggest the number of generation. Whereas a relative molecular weight is affiliated to the number of molecule formed in structural cells and on the other hand, structural cells have definite and determined dimensions, so by a simple replacement, the dendrimer molecular weight was directly related to its generation number. Data analysis derived from specific equation was shown that the prediction of a dendrimer molecular weight may be applicable by a specific generation.