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1 - Preparation and characterization of nano-ZnO catalyst and its application insynthesis of2-amino-3-phenylsulfonyl-4-aryl-4H-benzo[h]chromen derivatives
Vida Jodaian Bahareh SadeghiAn efficient and environmentally adapted synthesis of 2-amino-3-phenylsulfonyl-4-aryl-4H-benzo[h]chromenderivatives by condensation of a wide range of aryl aldehydes, α-naphthol and (phenylsulfonyl)acetonitrile using a catalytic amount of nano-ZnOunder solvent-fre أکثرAn efficient and environmentally adapted synthesis of 2-amino-3-phenylsulfonyl-4-aryl-4H-benzo[h]chromenderivatives by condensation of a wide range of aryl aldehydes, α-naphthol and (phenylsulfonyl)acetonitrile using a catalytic amount of nano-ZnOunder solvent-free condition is explained. This catalyst was characterized by scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FT-IR),X-ray diffraction spectroscopy (EDX)and Thermogravimetric analysis (TG).As aresult, 2-amino-3-phenylsulfonyl-4-aryl-4H-benzo[h]chromens were produced under facile conditions in high yield (89-96%) and high rate (8-15 min) using nano-ZnO as a recyclable catalyst. تفاصيل المقالة -
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2 - A Highly Efficient Protocol for the Synthesis of 2-Amidoalkylphenols using SO3H-Functionalized Phthalimide (SFP) under Solvent-free Conditions
Abdolkarim Zare Maryam Maghsoudi Bentolhoda Gholami Ahmad Reza Moosavi-ZareA highly efficient and simple protocol for the synthesis of 2-amidoalkylphenols has been described. The one-pot multi-component condensation of phenols with aromatic aldehydes and amides in the presence of catalytic amount of SO3H-functionalized phthalimide (SFP) under أکثرA highly efficient and simple protocol for the synthesis of 2-amidoalkylphenols has been described. The one-pot multi-component condensation of phenols with aromatic aldehydes and amides in the presence of catalytic amount of SO3H-functionalized phthalimide (SFP) under solvent-free conditions afford the title compounds in high yields and relatively short reaction times. It is noteworthy that the reaction between phenols, arylaldehydes and amides has been scarcely studied in the literature (in spite of the condensation of 2-naphthol with arylaldehydes and amides, which has been extensively reported). تفاصيل المقالة -
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3 - Synthesis and Identification of SO3H-functionalized Phthalimide (SFP) as an Efficient Catalyst for the Condensation of Dimedone with Arylaldehydes
Abdolkarim Zare Hakimeh Asvar Fatemeh Zarei Maryam Khalili Zahra Kordrostami Ahmad Reza Moosavi-Zare Vahid KhakyzadehA SO3 H-containing solid acid namely SO3 H-functionalized phthalimide (SFP) was synthesized from phthalimide and chlorosulfonic acid, and identified by studying its FT-IR, 1 H and 13C NMR, Mass, XRD, TG and DTG spectra. Afterward, its catalytic activity was examined for أکثرA SO3 H-containing solid acid namely SO3 H-functionalized phthalimide (SFP) was synthesized from phthalimide and chlorosulfonic acid, and identified by studying its FT-IR, 1 H and 13C NMR, Mass, XRD, TG and DTG spectra. Afterward, its catalytic activity was examined for the solvent-free condensation of dimedone (5,5-dimethyl-1,3-cyclohexanedione) (2 eq.) with arylaldehydes (1 eq.). The results showed that SFP is a highly efficient catalyst to promote the title reaction for the preparation of 9-aryl-1,8-dioxo-octahydroxanthenes. تفاصيل المقالة -
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4 - Synthesis of Tetrahydrobenzo[a]xanthene-11-one Derivatives Using ZrO2–SO3H as Highly Efficient Recyclable Nano-catalyst
Ahmad Nakhaei Sepideh YadegarianThe catalytic effect of Zirconia Sulfuric Acid (ZrSA) nanoparticle which is synthesized from thereaction of ZrO with chlorosulfonic acid has been investigated in the synthesis oftetrahydrobenzo[a]xanthene-11-ones by one-pot three-component reaction of β-naphthol,ar أکثرThe catalytic effect of Zirconia Sulfuric Acid (ZrSA) nanoparticle which is synthesized from thereaction of ZrO with chlorosulfonic acid has been investigated in the synthesis oftetrahydrobenzo[a]xanthene-11-ones by one-pot three-component reaction of β-naphthol,aromatic aldehydes, and dimedone. Different reaction conditions were studied in the presence ofZrSA nanoparticle as catalyst. The results showed that ZrSA exhibited high catalytic activitytowards the synthesis of tetrahydrobenzo[a]xanthene-11-ones, with the desired products beingformed in high yields. Furthermore, the catalyst was recyclable and could be reused at least threetimes without any discernible loss in its catalytic activity. Overall, this new catalytic method forthe synthesis of tetrahydrobenzo[a]xanthene-11-ones provides rapid access to the desiredcompounds under solvent-free conditions at 110 °C following a simple work‐up procedure, andavoids the use of harmful organic solvents. This method therefore represents a significantimprovement over the methods currently available for the synthesis oftetrahydrobenzo[a]xanthene-11-ones. تفاصيل المقالة -
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5 - Using of modified sugarcane bagasse as a green and inexpensive catalyst for the synthesis of indeno[1,2-b]quinolin-8-one derivatives
Samaneh Hamidi Zare Esmael RostamiChemical grafting of 3-aminipropyl triethoxysilane to carbonized bagasse and acidification of amino groups leads us to introduce a new, efficient and green solid acid catalyst. We used the Fourier-transform infrared spectroscopy (FT-IR), X-Ray Diffraction (XRD), Thermog أکثرChemical grafting of 3-aminipropyl triethoxysilane to carbonized bagasse and acidification of amino groups leads us to introduce a new, efficient and green solid acid catalyst. We used the Fourier-transform infrared spectroscopy (FT-IR), X-Ray Diffraction (XRD), Thermogravimetric analysis (TGA), Field Emission Scanning Electron Microscope (FE-SEM), elemental-mapping and Energy Dispersive X-ray spectroscopy (EDX) for the characterization of the catalyst. This novel catalyst efficiently used to the synthesis of benzo[h]indenoquinolin derivatives and the products were obtained with 80–95% of yields at 3-5 h with high purity. All of the products were characterized by FT-IR, 1H and 13CNMR spectroscopies and compared with authentic samples. Our protocol offers several significant advantages, such as easy preparation of catalyst, green nature of catalyst and reaction media, high yields, good reaction times and easy workup. تفاصيل المقالة -
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6 - Fe3O4@SiO2@Am-PPC-SO3H] [HSO4]: A new magnetic solid acid nanocatalyst for the synthesis of benzoxazole derivatives
Mona Sayyahi Maryam Gorjizadeh Soheil SayyahiA novel magnetite nanoparticle-based heterogeneous acidic catalyst [Fe3O4@SiO2@Am-PPC-SO3H] [HSO4] was successfully prepared and characterized by SEM, EDX, TGA, VSM and FT-IR techniques. The magnetically retrievable and sustainable catalyst was investigated in the react أکثرA novel magnetite nanoparticle-based heterogeneous acidic catalyst [Fe3O4@SiO2@Am-PPC-SO3H] [HSO4] was successfully prepared and characterized by SEM, EDX, TGA, VSM and FT-IR techniques. The magnetically retrievable and sustainable catalyst was investigated in the reaction of aldehyde and o-aminophenol for the synthesis of benzoxazoles. The reactions occurred in water and produced the corresponding products in high yields. The catalyst could be readily separated by an external magnet and showed excellent reusability without significant loss of its activity. تفاصيل المقالة -
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7 - Introduction of sulfonated bamboo (bamboo-SO3H) as a new catalyst for the facile synthesis of bis(indolyl)methanes
Farimah Mazloom Kalimani Abdollah Fallah Shojaei Laleh SamaviBamboo is one of the important biopolymers which is used in chemistry. In this work, for the first time, a solid acid catalyst from bamboo was prepared from the reaction of sawdust bamboo and chlorosulfonic acid. Relevant properties of catalyst were investigated by FT-I أکثرBamboo is one of the important biopolymers which is used in chemistry. In this work, for the first time, a solid acid catalyst from bamboo was prepared from the reaction of sawdust bamboo and chlorosulfonic acid. Relevant properties of catalyst were investigated by FT-IR, XRD, SEM and TGA. The sulfonated bamboo (bamboo-SO3H) with several acid functional groups was utilized as highly efficient, heterogeneous and reusable catalyst for synthesis of bis(indolyl)methanes in short reaction times with excellent yields. Also, the novel solid acid catalyst was reused without any appreciable loss in activity. تفاصيل المقالة -
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8 - Nano-BF3/cellulose as a biodegradable novel catalyst for synthesis of highly functionalized tetrahydropyridines
Seyede Azita Fazeli-Attar Bi Bi Fatemeh MirjaliliNano-cellulose with high amount of free OH groups could be used as supporting agents for boron trifluoride (BF3). Nano-BF3/cellulose is a solid acid and a biodegradable catalyst which was prepared via reaction of nano-cellulose and BF3. The structure of this catalyst wa أکثرNano-cellulose with high amount of free OH groups could be used as supporting agents for boron trifluoride (BF3). Nano-BF3/cellulose is a solid acid and a biodegradable catalyst which was prepared via reaction of nano-cellulose and BF3. The structure of this catalyst was studied by FT-IR, FESEM, TEM, XRD, EDS, TGA, XRF and BET. In this research, the synthesis of highly functionalized tetrahydropyridines has been developed via a five-component reaction of aldehyde, amine and ethyl acetoacetate using nano-BF3/cellulose under solvent-free conditions. The structures of obtained products were identified by FTIR, 1H NMR and 13C NMR. Some advantages of this protocol are high to good yields, environmentally benign procedure, easy work-up of reaction and moderate reusability of the catalyst. تفاصيل المقالة -
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9 - Nano-silica supported ethane-sulfonic acid: An efficient heterogeneous solid acid catalyst for one-pot synthesis of xanthene and acridine derivatives
Zohreh Loghemani Jahromi Hassan ZareIn this study, silica nanoparticles were used as support to prepare a new heterogeneous catalyst system for application in organic reactions. The reaction of silica nanoparticles with sodium 2-bromoethane-1-sulfonate resulted in the connection of a sulfonic acid group o أکثرIn this study, silica nanoparticles were used as support to prepare a new heterogeneous catalyst system for application in organic reactions. The reaction of silica nanoparticles with sodium 2-bromoethane-1-sulfonate resulted in the connection of a sulfonic acid group on the surface of silica nanoparticles (NSESA). The synthetic catalyst system was characterized using different microscopic and spectroscopic techniques. After characterization of NSESA, its catalytic activity was evaluated in a multicomponent reaction for one-pot synthesis of xanthene and acridine derivatives. Results of this study show that this catalyst system is effective in this reaction so that a range of xanthenes and acridines were obtained in high isolated yields under optimized conditions. The catalyst system was reusable at least for 7 times without significant decreasing in its catalytic activity. تفاصيل المقالة -
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10 - Phospho sulfonic acid: an efficient solid acid catalyst for the facile preparation of 1,4-dihydropyridines
Sobhan Rezayati Parisa JavanmardiA simple and mild one-pot three-component reaction for the preparation 1,4-dihydropyridines has been developed from various aldehyde substrates, 1,3-dicarbonyl compounds (dimedone) and ammonium acetate (Hantzsch method) in the presence of a catalytic amount of phospho s أکثرA simple and mild one-pot three-component reaction for the preparation 1,4-dihydropyridines has been developed from various aldehyde substrates, 1,3-dicarbonyl compounds (dimedone) and ammonium acetate (Hantzsch method) in the presence of a catalytic amount of phospho sulfonic acid (PSA) as an efficient and heterogeneous solid acid in EtOH at room temperature. Preparation of PSA is straightforward and handling of the reagent is also easy. The attractive features of this protocol are: (i) The elimination of corrosive liquid acids; (ii) the use of an inexpensive and relatively non-toxic catalyst, and (iii) reusability of the catalyst. تفاصيل المقالة -
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11 - Understanding the role of acid sites of Zinc Aluminophosphate catalysts in eco-friendly synthesis of carbamates
Hamza Annath Vijayasankar Viswambaram Aloor Nagaraju NarasimhaiahAluminophosphate and metal incorporated aluminophosphates have been synthesized at ice-cold temperature by simple co-precipitation method in the absence of a templating agent. Surface and bulk properties of synthesized materials were studied by different characterizatio أکثرAluminophosphate and metal incorporated aluminophosphates have been synthesized at ice-cold temperature by simple co-precipitation method in the absence of a templating agent. Surface and bulk properties of synthesized materials were studied by different characterization techniques. The materials were found to be X-ray amorphous. N2 adsorption-desorption studies exhibited the existence of microporous structure and uniform narrow slit type of pores on the materials. The catalytic activity of the synthesized material was tested in phosgene free synthesis of carbamates from corresponding amines and dimethyl carbonate (DMC) through a greener route. Metal incorporated Aluminophosphates indicated excellent catalytic activity compared to pure aluminophosphates. Zinc aluminophosphate catalyst exhibited 83% carbamate yield with 100% selectivity towards the formation of carbamate. The excellent catalytic activity of Zinc aluminophosphate with 94% amine conversion is attributed to its surface properties mainly moderate acid strength. The incorporated metal plays a vital role in the structural and textural properties of aluminophosphates. A systematic study was conducted to correlate the catalytic activity and surface properties of metal aluminophosphates. Reaction conditions were optimized to obtain a better yield through phosgene free eco-friendly routes using different amines. The catalyst was found to be recyclable for 5 cycles in the desired reaction without a reduction in conversion and selectivity. تفاصيل المقالة -
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12 - Phosphorus acid: As multi-purpose catalysts
Milad Mohammadi RasoollMilad Mohammadi Rasooll was born in Hamedan, Iran in 1995. He received his B.Sc. in pure Chemistry (2018) from Bu-Ali Sina University, Iran. He is pursuing a M.Sc. in Organic Chemistry under the supervision of Prof. Mohammad Ali Zolfigol. His research interest is the sy أکثرMilad Mohammadi Rasooll was born in Hamedan, Iran in 1995. He received his B.Sc. in pure Chemistry (2018) from Bu-Ali Sina University, Iran. He is pursuing a M.Sc. in Organic Chemistry under the supervision of Prof. Mohammad Ali Zolfigol. His research interest is the synthesis, characterization and applications of homogeneous and heterogeneous reagents and catalysts in organic synthesis. تفاصيل المقالة -
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13 - Sulfonated porous carbon catalyzed esterification of free fatty acids
Arash Shokrolahi Abbas Zali Hamid PouretedalThe esterification of free fatty acids (FFA) with methanol is studied using Sulfonated Porous Carbon (SPC) as catalyst. In compare to the amorphous sugar catalyst and protonated Nafion, the proposed catalyst shows stability and high efficient performance in biodiesel pr أکثرThe esterification of free fatty acids (FFA) with methanol is studied using Sulfonated Porous Carbon (SPC) as catalyst. In compare to the amorphous sugar catalyst and protonated Nafion, the proposed catalyst shows stability and high efficient performance in biodiesel production. The highest initial rate of oleic acid conversion is obtained at catalyst loading of 1 mmol H+ and mole ratio of MeOH/Oleic acid of 10. The prepared Sulfonated Porous Carbon reused at least three times without loss of activity. تفاصيل المقالة -
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14 - Zwitterionic imidazolium salt of [MOEI]-BSA: An efficient solid acid catalyst-promoted green synthesis of quinoxaline derivatives
Sami Maryam Norollahi Sara MiriEasily 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 conditi أکثرEasily 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. تفاصيل المقالة -
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15 - Sulfuric acid ([3-(3-silicapropyl)-sulfanyl]propyl)ester as recyclable catalyst for the silylation of hydroxyl groups
Farid Rohandeh Dariush Saberi Khodabakhsh NiknamSulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl]ester (SASPSPE) is employed as a recyclable catalyst for the silylation of hydroxyl groups. A good range of primary, secondary alcohols and phenolic hydroxyl groups were effectively converted into their corresponding tri أکثرSulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl]ester (SASPSPE) is employed as a recyclable catalyst for the silylation of hydroxyl groups. A good range of primary, secondary alcohols and phenolic hydroxyl groups were effectively converted into their corresponding trimethylsilyl ethers with hexamethyldisilazane in the presence of catalytic amounts of SASPSPE at room temperature with short reaction times in good to excellent yields. This heterogeneous catalyst was recycled for nine runs without losing its catalytic activity. تفاصيل المقالة -
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16 - Sulfonated Porous Carbon (SPC): An efficient and recyclable solid acid catalyst for one-pot three-component synthesis of 2,3-dihydroquinazolin-4(1H)-ones under solvent-free conditions
Arash Shokrolahi Abbas Zali Mohammad Ali Zarei Karim EsmaeilpourA simple and efficient procedure has been developed for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones derivatives under solvent-free conditions. This method uses the condensation of isatoic anhydride, aldehydes, and amines in the presence of a catalytic amount Sulfo أکثرA simple and efficient procedure has been developed for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones derivatives under solvent-free conditions. This method uses the condensation of isatoic anhydride, aldehydes, and amines in the presence of a catalytic amount Sulfonated Porous Carbon (SPC). One of the important advantages of the new method is that the SPC could be recycled and reused. تفاصيل المقالة -
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17 - Boric acid as a highly efficient and reusable catalyst for the one-pot synthesis of 1,8-dioxo-octahydroxanthenes under solvent-free conditions
Sobhan Rezayati Rahimeh Hajinasiri Zahra Erfani Saman Rezayati Saeid Afshari-sharifabadAn efficient and simple procedure for the synthesis of 1,8-dioxo-octahydroxanthenes from the aromatic aldehydes and 5,5-dimethylcyclohexane-1,3-dione (dimedone) in the presence of boric acid [BO3H3 or B(OH)3] as an inexpensive and reusable catalyst is described. The sal أکثرAn efficient and simple procedure for the synthesis of 1,8-dioxo-octahydroxanthenes from the aromatic aldehydes and 5,5-dimethylcyclohexane-1,3-dione (dimedone) in the presence of boric acid [BO3H3 or B(OH)3] as an inexpensive and reusable catalyst is described. The salient features of this methodology are: the elimination of corrosive liquid acids, high yields, simple methodology, short reaction times, easy work-up and green heterogeneous catalyst. تفاصيل المقالة -
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18 - Silica-bonded n-propyldiethylenetriamine sulfamic acid as a recyclable solid acid catalyst for the synthesis of coumarin and biscoumarin derivatives
Khodabakhsh Niknam Seyed Ahmad Sajadi Roghayeh Hosseini Mojtaba BaghernejadSilica-bonded n-propyldiethylenetriamine sulfamic acid (SBPDSA) was found as an efficient solid acid for the synthesis of coumarins. Coumarin derivatives were obtained via the Pechmann condensation reaction of phenols and β-keto-esters at 80 oC under solvent-free c أکثرSilica-bonded n-propyldiethylenetriamine sulfamic acid (SBPDSA) was found as an efficient solid acid for the synthesis of coumarins. Coumarin derivatives were obtained via the Pechmann condensation reaction of phenols and β-keto-esters at 80 oC under solvent-free conditions. Also, biscoumarins were obtained via the condensation of aldehydes and 4-hydroxycoumarin in water at reflux conditions. The heterogeneous solid acid showed much the same efficiency when used in consecutive reaction runs. تفاصيل المقالة