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微波辅助溶胶-凝胶法合成MgO纳米粒子及其催化合成Hantzsch1,4-二氢吡啶性能(英文) 被引量:6
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作者 Hakimeh MIRZAEI abolghasem davoodnia 《催化学报》 SCIE EI CAS CSCD 北大核心 2012年第9期1502-1507,共6页
A microwave-assisted sol-gel method was employed for the preparetion of nano-sized MgO particles using Mg(NO 3)2·6H2O as precursor and deionized water as solvent.The sample calcined at 500℃ had a high specific s... A microwave-assisted sol-gel method was employed for the preparetion of nano-sized MgO particles using Mg(NO 3)2·6H2O as precursor and deionized water as solvent.The sample calcined at 500℃ had a high specific surface area of 243.2m2/g and particles sizes from 9.5to10.5nm.For comparison,MgO nanoparticles were also synthesized without microwave irradiation.X-ray diffraction (XRD) characterization showed the formation of smaller particles after microwave irradiation.The structure and morphology of the MgO particles were analyzed by N2 adsorption-desorption,XRD,scanning electron microscopy,and transmission electron microscopy.Their catalytic behavior was studied with the one-pot synthesis of Hantzsch1,4-dihydropyridines from the reaction of aromatic aldehydes,ethyl acetoacetate,and ammonium acetate.The MgO nanoparticles have high catalytic activity and gave the desired products in good to high yields.The catalyst can be easily recovered by filtration and was used at least three times with only a slight reduction in its catalytic activity. 展开更多
关键词 magnesium oxide MICROWAVE-ASSISTED SOL-GEL method NANOPARTICLE HANTZSCH 1 4-DIHYDROPYRIDINE
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四丁基铵钨多酸[TBA]2[W6O19]:无溶剂条件下通过不对称汉斯反应快速合成聚氢化喹啉的新型可重复使用的非均相催化剂(英文) 被引量:5
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作者 abolghasem davoodnia Maryam KHASHI Niloofar TAVAKOLI‐HOSEINI 《催化学报》 SCIE EI CAS CSCD 北大核心 2013年第6期1173-1178,共6页
A novel, efficient, and environmentally friendly method for the synthesis of polyhydroquinoline derivatives by a one‐pot, four‐component unsymmetrical Hantzsch condensation of dimedone, aldehydes, ethyl acetoacetate... A novel, efficient, and environmentally friendly method for the synthesis of polyhydroquinoline derivatives by a one‐pot, four‐component unsymmetrical Hantzsch condensation of dimedone, aldehydes, ethyl acetoacetate, and ammonium acetate in the presence of a catalytic amount of tetrabutylammonium hexatungstate [TBA]2[W6O19] under solvent‐free conditions has been developed. The results showed that this heterogeneous catalyst has high catalytic activity and the desired products were obtained in good to high yields. Moreover, the catalyst was found to be reusable and considerable catalytic activity was still achieved after the fifth run. 展开更多
关键词 Heterogeneous catalysis POLYHYDROQUINOLINES TETRABUTYLAMMONIUM hexatungstate
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以四丁铵六钨酸盐为可重复使用非均相催化剂无溶剂合成1,8-二氧十氢吖啶(英文) 被引量:5
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作者 abolghasem davoodnia Atefeh ZARE-BIDAKI Hossein BEHMADI 《催化学报》 SCIE EI CAS CSCD 北大核心 2012年第11期1797-1801,共5页
Tetrabutylammonium hexatungstate,[TBA]2[W6O19],has been used as an efficient,inexpensive,and recyclable green catalyst for the one-pot three-component synthesis of 1,8-dioxodecahydroacridines by the reaction of dimedo... Tetrabutylammonium hexatungstate,[TBA]2[W6O19],has been used as an efficient,inexpensive,and recyclable green catalyst for the one-pot three-component synthesis of 1,8-dioxodecahydroacridines by the reaction of dimedone with aromatic or aliphatic aldehydes in the presence of a nitrogen source(ammonium acetate or aromatic amines) under neat conditions.There are several advantages to the current process over the standard procedures available in the literature,including shorter reaction times(7-14 min),higher yields,facile work-up,and minimal environmental impact.Furthermore,the catalyst can be conveniently recovered and reused. 展开更多
关键词 LFCO XRD 化学 化学动力学
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磺化碳催化Biginelli反应一锅法合成3,4-二氢-2(1H)-酮和硫酮(英文) 被引量:4
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作者 Maryam MOGHADDAS abolghasem davoodnia +1 位作者 Majid M.HERAVI Niloofar TAVAKOLI-HOSEINI 《催化学报》 SCIE EI CAS CSCD 北大核心 2012年第4期706-710,共5页
A sulfonated carbon material was shown to be a highly efficient,eco-friendly,and recyclable solid acid catalyst for the Biginelli reaction of β-ketoester,aldehyde,and urea or thiourea under solvent-free conditions.It... A sulfonated carbon material was shown to be a highly efficient,eco-friendly,and recyclable solid acid catalyst for the Biginelli reaction of β-ketoester,aldehyde,and urea or thiourea under solvent-free conditions.It gave 3,4-dihydropyrimidin-2(1H)-ones and-thiones in good to excellent yields.This method has the advantages of a simple procedure with easy work-up,short reaction time,and high yields.The catalyst can be recycled after a simple work-up and was reused four times without substantial reduction in activity. 展开更多
关键词 化学 催化 高压 高温
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Selective and mild oxidation of sulfides to sulfoxides by H_2O_2 using DBUH-Br_3 as catalyst 被引量:3
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作者 Mehdi Bakavoli Alireza Motavalizadeh Kakhky +4 位作者 Ali Shiri Mahdieh Ghabdian abolghasem davoodnia Hossein Eshghi Mola Khatami 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第6期651-655,共5页
DBUH-Br_3 catalyzed selective conversion of sulfides to sulfoxides in the presence of H_2O_2 as oxidizing agent is described.The reaction was performed selectively at room temperature and relatively short reaction times.
关键词 Sulfide SULFOXIDE Selective oxidation H2O2 DBUH-Br3
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无溶剂条件下可重复使用的担载的酸性离子液体催化剂高效催化酮和芳香醛选择性Cross-Aldol缩合反应(英文) 被引量:3
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作者 abolghasem davoodnia Ghazaleh YASSAGHI 《催化学报》 SCIE EI CAS CSCD 北大核心 2012年第12期1950-1957,共8页
A newly prepared catalyst consisting of acidic ionic liquid 1-(4-sulfonic acid)butylpyridinium hydrogen sulfate supported on silica was used to catalyze the cross-aldol condensation of ketones with aromatic aldehydes ... A newly prepared catalyst consisting of acidic ionic liquid 1-(4-sulfonic acid)butylpyridinium hydrogen sulfate supported on silica was used to catalyze the cross-aldol condensation of ketones with aromatic aldehydes under solvent-free conditions. The highly active and selective catalyst gave good to excellent yields of the desired cross-aldol products without the occurrence of any self-condensation reactions. Reaction times were short, the procedure and work-up were simple, and no volatile or hazardous organic solvents were necessary. Moreover, the catalyst could be reused at least four times with only a slight reduction in activity. 展开更多
关键词 化学 燃烧 原理 催化
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无溶剂条件下碳基固体酸催化一锅法合成酰胺烷基萘酚(英文) 被引量:1
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作者 abolghasem davoodnia Rahil Mahjoobin Niloofar Tavakoli-Hoseini 《催化学报》 SCIE EI CAS CSCD 北大核心 2014年第4期490-495,共6页
An efficient, environmentally friendly procedure for the synthesis of amidoalkyl naphthols through the one‐pot, three‐component reaction of β‐naphthol, aryl aldehydes, and acetamide in the presence of a carbon‐ba... An efficient, environmentally friendly procedure for the synthesis of amidoalkyl naphthols through the one‐pot, three‐component reaction of β‐naphthol, aryl aldehydes, and acetamide in the presence of a carbon‐based solid acid under thermal solvent‐free conditions is described. The beneficial fea-tures of this new synthetic approach include short reaction time, high yields, clean reaction profiles, and a simple work‐up procedure. Furthermore, the catalyst can be readily recycled and reused four times without obvious significant loss of activity. The structure of the catalyst was confirmed by Fourier transform infrared spectroscopy, N2 adsorption/desorption analysis, and X‐ray diffraction. 展开更多
关键词 一锅法合成 无溶剂条件 固体酸催化 Β-萘酚 胺烷基 碳基 简便 反应时间
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高效可重复使用多相催化剂Ce(SO_4)_2·4H_2O用于无溶剂一锅合成2,3-二氢喹唑啉-4(1H)-酮(英文)
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作者 abolghasem davoodnia Maryam Khashi Niloofar Tavakoli-Hoseini 《催化学报》 SCIE EI CAS CSCD 北大核心 2014年第7期1054-1058,共5页
Cerium(IV) sulfate tetrahydrate, Ce(SO4)2·4H2O, is a novel inorganic solid acidic catalyst that efficiently catalyzes the synthesis of 2,3-dihydroquinazolin-4(1H)-ones via the one-pot three- component reaction of... Cerium(IV) sulfate tetrahydrate, Ce(SO4)2·4H2O, is a novel inorganic solid acidic catalyst that efficiently catalyzes the synthesis of 2,3-dihydroquinazolin-4(1H)-ones via the one-pot three- component reaction of isatoic anhydride, aromatic aldehydes, and a nitrogen source(ammonium acetate, ammonium carbonate, ammonium chloride, or methylamine) under solvent-free conditions. The desired products are obtained in short reaction time with high yields. The catalyst is inexpensive and readily available and can be recovered conveniently and reused such that considerable catalytic activity can still be achieved after the fifth run. Easy work-up and avoiding the use of harmful organic solvents are other advantages of this simple procedure. 展开更多
关键词 非均相催化剂 无溶剂条件 一锅法合成 硫酸盐 喹唑啉 可重复使用 二氢
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Keplerate巨型纳米多孔聚氧钼酸盐作为可重复使用催化剂用于合成1,2,4,5-四取代咪唑(英文)
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作者 Ahmad Nakhaei abolghasem davoodnia 《催化学报》 SCIE EI CAS CSCD 北大核心 2014年第10期1761-1767,共7页
The Keplerate‐type giant nanoporous isopolyoxomolybdate (NH4)42[MoVI72MoV60O372‐(CH3COO)30(H2O)72], denoted {Mo132}, has been used as a catalyst for the synthesis of1,2,4,5‐tetrasubstituted imidazol... The Keplerate‐type giant nanoporous isopolyoxomolybdate (NH4)42[MoVI72MoV60O372‐(CH3COO)30(H2O)72], denoted {Mo132}, has been used as a catalyst for the synthesis of1,2,4,5‐tetrasubstituted imidazoles by the one‐pot, four‐component thermal reaction of benzil with aromatic aldehydes, primary amines, and ammonium acetate under solvent‐free conditions. The catalyst was prepared according to a previously published literature procedure using inexpensive and readily available starting materials, and subsequently characterized by FT‐IR, UV and X‐ray diffraction spectroscopy, as well as microanalysis. The results showed that {Mo132} exhibited high catalytic activity towards the synthesis of 1,2,4,5‐tetrasubstituted imidazoles, with the desired products being formed in good to high yields. Furthermore, the catalyst was recyclable and could be reused at least three times without any discernible loss in its catalytic activity. Overall, this new catalytic method for the synthesis of 1,2,4,5‐tetrasubstituted imidazoles provides rapid access to the desired compounds following a simple work‐up procedure, and avoids the use of harmful organic solvents. This method therefore represents a significant improvement over the methods currently available for the synthesis of tetrasubstituted imidazoles. 展开更多
关键词 取代咪唑 合成方法 可重复使用 纳米多孔 催化剂 E型 应用 催化活性
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PPA-SiO_2 catalyzed efficient synthesis of polyhydroquinoline derivatives through Hantzsch multicomponent condensation under solvent-free conditions 被引量:12
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作者 Amir Khojastehnezhad Farid Moeinpour abolghasem davoodnia 《Chinese Chemical Letters》 SCIE CAS CSCD 2011年第7期807-810,共4页
Silica gel-supported polyphosphoric acid (PPA-SiO2) was found to be an efficient catalyst for the one-pot four-component Hantzsch condensation reaction of aryl aldehydes, dimedone, ethyl acetoacetate and ammonium ac... Silica gel-supported polyphosphoric acid (PPA-SiO2) was found to be an efficient catalyst for the one-pot four-component Hantzsch condensation reaction of aryl aldehydes, dimedone, ethyl acetoacetate and ammonium acetate to afford the corresponding polyhydroquinoline derivatives in high yields. The main advantages of the present approach are short reaction times, clean reaction profiles, simple experimental and workup procedures. 展开更多
关键词 Multicomponent reaction One-pot synthesis SOLVENT-FREE Polyhydroquinoline derivatives Silica-supported polyphosphoric acid (PPA-SiO2)
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