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Preparation of Silica-bonded Propyl-diethylene-triamine-N- sulfamic Acid as a Recyclable Catalyst for Chemoselective Synthesis of 1,1-Diacetates

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Chinese Journal of Chemistry 2011年第11期29卷 2361-2367页

作者： Nouri Sefat, Maryam Deris, Abdolah niknam, khodabakhsh Chemistry Department Faculty of Sciences Persian Gulf University Bushehr 75169 Iran

A simple and efficient procedure for the preparation of silica-bonded propyl-diethylene-triamine-N-sulfamic acid （SPDTSA） by reaction of 3-diethylenetriamine-propylsilica （DTPS） and chlorosulfonic acid in chloroform is described. Silica-bonded propyl-diethylene-triamine-N-sulfamic acid is employed as a recyclable catalyst for the synthesis of 1,1-diacetates from aromatic aldehydes and acetic anhydride under mild and solvent-free conditions at room temperature. Catalyst could be recycled for several times without any additional treatment.

关键词： silica-bonded propyl-diethylene-triamine-N-sulfamic acid 1,1-diacetates aromatic aldehydes catalyst solvent-free

Synthesis of some new bis-3,4-dihydropyrimidin-2(1H)-ones by using silica-supported tin chloride and titanium tetrachloride

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Chinese Chemical Letters 2010年第4期21卷 399-402页

作者： khodabakhsh niknam Alireza Hasaninejad Madihe Arman Department of Chemistry Faculty of SciencesPersian Gulf University

Silica-supported tin chloride and titanium tetrachloride were prepared by the reaction of tin chloride and titanium tetrachloride with activated silica gel in refluxing *** solid acids have been employed as the catalysts for the synthesis of bisdihydropyrimidin -2(1H)-ones from aromatic dialdehydes,1,3-dicarbonyl compounds and urea at 90℃under solvent-free conditions.

关键词： Silica-supported tin chloride Silica-supported titanium tetrachloride Bis-3 4-dihydropyrimidin-2(1H)-one Solvent-free 1 3-Dicarbonyl compounds

Silica-bonded S-sulfonic acid a recyclable catalyst for the synthesis of coumarins

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Chinese Chemical Letters 2009年第12期20卷 1444-1448页

作者： khodabakhsh niknam Dariush Saberi Mojtaba Baghernejad Department of Chemistry Faculty of SciencesPersian Gulf University

Silica-bonded S-sulfonic acid （SBSSA） was prepared by the reaction of 3-mercaptopropylsilica （MPS） and chlorosulfonic acid in chloroform. This solid acid has been employed as a recyclable catalyst for the synthesi... 详细信息

关键词： Silica-bonded S-sulfonic acid Coumarins Solvent-free Phenols -Keto-esters

Synthesis of α-aminonitriles using silica-bonded N-propylpiperazine sulfamic acid as a recyclable catalyst

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Chinese Chemical Letters 2012年第10期23卷 1103-1106页

作者： Tahere Rahi Mojtaba Baghernejad khodabakhsh niknam Department of Chemistry Gachsaran BranchIslamic Azad UniversityGachsaranlran Department of Chemistry Faculty of SciencesPersian Gulf UniversityBushehr 75169Iran

α-Aminonitriles were synthesized via a one-pot three-component condensation of aldehydes, amines, and trimethylsilyl cyanide using silica-bonded N-propylpiperazine sulfamic acid （SBPPSA） as a recyclable solid acid ... 详细信息

关键词： Silica-bonded N-propylpiperazine sulfamic acid α-Aminonitriles Aldehydes Amines Catalyst Solid acid

Silica-bonded S-sulfonic Acid as a Recyclable Catalyst for Synthesis of 2,3-Dihydroquinazolin-4（1H）-ones

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Chinese Journal of Chemistry 2011年第7期29卷 1417-1422页

作者： niknam, khodabakhsh Mohammadizadeh, Mohammad Reza Mirzaee, Salimeh Chemistry Department Faculty of Sciences Persian Gulf University Bushehr 75169 Iran

2,3-Dihydroquinazolin-4（1H）-one derivatives were synthesized via a one-pot, three component reaction of isatoic anhydride and an aromatic aldehyde with ammonium acetate or primary amine catalyzed by silica-bonded S-sulfonic acid in ethanol at 80 ℃. The reaction work-up is simple and the catalyst is easily separated from the products by filtration. The heterogeneous catalyst was recycled for ten runs upon the condensation reaction of isa- toic anhydride and 4-chlorobenzaldehyde with ammonium acetate without losing its catalytic activity.

关键词： silica-bonded S-sulfonic acid aldehydes 2,3-dihydroquinazolin-4(1H)-one isatoic anhydride amines

Sulfuric acid {[3-(3-silicapropyl)sulfanyl]propyl}ester a recyclable catalyst for the synthesis of 2-aryl- 1-arylmethyl- 1H- 1,3-benzimidazole derivatives

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Chinese Chemical Letters 2011年第10期22卷 1151-1154页

作者： Nasir Iravani Negar Safikhani Mohammadzade khodabakhsh niknam Department of Chemistry Islamic Azad UniversityGachsaran BranchGachsaranIran

A highly selective synthesis of 2-aryl-1-arylmethyl-1H-1,3-benzimidazoles from the reaction of o-phenylenediamine and aromatic aldehydes in the presence of sulfuric acid{[3-(3-silicapropyl)sulfanyl]propyl}ester(SASPSP... 详细信息

关键词： Sulfuric acid{[3-(3-silicapropyl)sulfanyl]propyl}ester 2-Aryl-1-arylmethyl-1H-1 3-benzimidazoles Aldehydes o-Phenylenediamine Water

Synthesis of 2-Aryl-l-arylmethyl-lH-1,3-benzimidazole Derivatives Using Silica-bonded PropyI-S-sulfonic Acid as Recyclable Solid Acid Catalyst

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Chinese Journal of Chemistry 2012年第3期30卷 517-521页

作者： Ghaem Ahmadi-Ana,Sayed Mohammad Baghernejad,Mojtaba niknam,khodabakhsh Chemistry Department Gachsaran BranchIslamic Azad UniversityGachsaranIran Chemistry Department Faculty of SciencesPersian Gulf UniversityBushehr75169Iran

A highly selective synthesis of 2-aryl-l-arylmethyl-lH-1,3-benzimidazoles from the reaction of o-phenylene- diamine and aromatic aldehydes in the presence of silica-bonded propyl-S-sulfonic acid （SBSSA） at 80℃ in w... 详细信息

关键词： silica-bonded propyl-S-sulfonic acid aldehydes 2-aryl- 1-arylmethyl-lH-1,3-benzimidazoles,o-phenylenediamine water

以硅胶键合N-丙基哌嗪基丙酸钠为可循环催化剂合成3,4-二氢吡喃[c]苯并吡喃衍生物和香豆素(英文)

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催化学报 2012年第11期33卷 1840-1849页

作者： khodabakhsh niknam Abbas JAMALI Department of Chemistry Faculty of SciencesPersian Gulf UniversityBushehr 75169Iran

A simple and efficient procedure for the preparation of silica-bonded N-propylpiperazine sodium n-propionate(SBPPSP) by the hydrolysis of silica-bonded N-propylpiperazine methyl n-propionate(SBPPMP) in hydrochloric acid(0.5 mol/L) followed by treatment with saturated sodium bicarbonate is *** SBPPMP was obtained by the reaction of 3-silica-bonded N-propylpiperazine and methyl acrylate in *** was used as a recyclable basic catalyst for the synthesis of 3,4-dihydropyrano[c]chromenes by the reaction of aromatic aldehydes,malononitrile,and 4-hydroxycoumarin in aqueous ethanol(1:1 v/v) under reflux *** were also obtained via condensation of aldehydes and 4-hydroxycoumarin in aqueous ethanol(1:1 v/v) under reflux *** catalyst could be recycled several times without any additional treatment.

关键词： LFCO XRD 化学化学动力学

硅胶键合N-丙基二乙烯氨基磺酸作为可回收固体酸催化剂催化合成α-氨基腈(英文)

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催化学报 2012年第7期33卷 1095-1100页

作者： Tahere RAHI Mojtaba BAGHERNEJAD khodabakhsh niknam Department of Chemistry Gachsaran BranchIslamic Azad University Department of Chemistry Faculty of SciencesPersian Gulf University

Silica-bonded N-propyl diethylenetriamine sulfamic acid (SBPDSA) is employed as a recyclable catalyst to synthesize α-aminonitriles. These syntheses involved one-pot condensation of an aldehyde, an amine, and trimethylsilyl cyanide under mild reaction conditions at room temperature. SBPDSA was recycled seven times in the condensation of benzaldehyde, aniline, and trimethylsilyl cyanide without reduction of its catalytic activity.

关键词： silica-bonded N-propyl diethylenetriamine sulfamic acid α-aminonitrile solid acid aldehyde heterogeneous catalyst