scholarly journals ZSM-5-SO3H: An Efficient Catalyst for Acylation of Sulfonamides Amines, Alcohols, and Phenols under Solvent-Free Conditions

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Ahmad Reza Massah ◽  
Roozbeh Javad Kalbasi ◽  
Mahdiehsadat Khalifesoltani ◽  
Fariba Moshtagh Kordesofla
Keyword(s):  
Catalytic Activity ◽  
Carboxylic Acid ◽  
Chromatographic Separation ◽  
Solvent Free ◽  
Efficient Catalyst ◽  
Direct Esterification ◽  
Solvent Free Conditions ◽  
Different Types ◽  
Acid Anhydrides ◽  
High Yields

Sulfonamides amines, alcohols, and phenols were efficiently acylated with carboxylic acid anhydrides and chlorides using ZSM-5-SO3H as catalyst under mild and solvent-free conditions. Also, direct esterification of alcohols with carboxylic acids occurred readily in the presence of this catalyst. Different types of amides and esters were obtained in moderate to high yields and purity after a simple workup. No chromatographic separation is needed for isolation of the acylated product. The catalyst was recovered and reused for up to four times without a noticeable decrease in catalytic activity.

Commercial ZrO2 as a new, efficient, and reusable catalyst for the one-step synthesis of quinolines in solvent-free conditions

2009 ◽  
Vol 87 (8) ◽  
pp. 1122-1126 ◽  
Author(s):  
Mona Hosseini-Sarvari
Keyword(s):  
Catalytic Activity ◽  
Carbonyl Compound ◽  
Significant Loss ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
One Step ◽  
The One ◽  
High Yields

Commercially available zirconia (ZrO2) is reported as an extremely efficient catalyst for the synthesis of quinolines. A one-step reaction of 2-aminoarylketones and a carbonyl compound (Friedlander reaction) took place under solvent-free conditions to afford the corresponding quinolines in good-to-high yields in the presence of ZrO2. Furthermore, the catalyst is reused several times without any significant loss of its catalytic activity.

scholarly journals Hydrotalcite as an Efficient and Reusable Catalyst for Acylation of Phenols, Amines and Thiols Under Solvent-free Conditions

2012 ◽  
Vol 9 (4) ◽  
pp. 2501-2508 ◽  
Author(s):  
A. R. Massah ◽  
R. J. Kalbasi ◽  
M. Toghiani ◽  
B. Hojati ◽  
M. Adibnejad
Keyword(s):  
Carboxylic Acid ◽  
Room Temperature ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Solvent Free Conditions ◽  
Acid Anhydrides ◽  
High Yields

A wide variety of alcohols, phenols, amines and thiols were efficiently acylated with carboxylic acid anhydrides and chlorides in the presence of Hydrotalcite under solvent-free conditions at room temperature in good to high yields. Eco-friendly conditions and reusability of the catalyst are the most important advantages of this protocol.

TiO2–SiO2 nanocomposite as a highly efficient catalyst for the solvent-free cyclocondensation reaction of isatins, cyclohexanones, and urea

2019 ◽  
Vol 74 (7-8) ◽  
pp. 559-564
Author(s):  
Simin Janitabar-Darzi ◽  
Shahrzad Abdolmohammadi
Keyword(s):  
Present Method ◽  
High Efficiency ◽  
Solvent Free ◽  
High Catalytic Activity ◽  
One Pot ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Cyclocondensation Reaction ◽  
The One ◽  
High Yields

AbstractA TiO2–SiO2 nanocomposite catalyzes the one-pot cyclocondensation reaction of 1H-indole-2,3-diones (isatins), 1,3-cyclohexanediones, and urea at T = 70°C under solvent-free conditions with high efficiency. The present method affords the corresponding spiro products in high yields and short reaction time. The unique features of the TiO2–SiO2 nanocomposite are high catalytic activity, ease of preparation, non-toxicity, low loading, and recyclability.

scholarly journals Al(NO3)3 · 9H2O: An Efficient Catalyst for the One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones Both under Reflux or Solvent-Free Conditions

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Eskandar Kolvari ◽  
Maryam Mirzaeeyan
Keyword(s):  
Low Cost ◽  
Biginelli Reaction ◽  
Acid Catalyst ◽  
Solvent Free ◽  
One Pot ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
The One ◽  
High Yields ◽  
Environmentally Friendly Process

Al(NO3)3 · 9H2O efficiently catalyzes the three-component Biginelli reaction between an aldehyde, aβ-dicarbonyl compound, and urea or thiourea in refluxing ethanol and solvent-free (SF) conditions to afford the corresponding dihydropyrimidinones in high yields. The advantages of this method involve the easy procedure, the environmentally friendly process, and the low cost of the Lewis acid catalyst.

Coaled Carbon-Based Solid Acid: a New and Efficient Catalyst for Click Synthesis of 3,4-Dihydropyrimidin-2(1H)-Ones under Solvent-Free Conditions

2013 ◽  
Vol 634-638 ◽  
pp. 504-507
Author(s):  
Wan Yi Liu ◽  
Ning Liu ◽  
Rui Yuan Zheng ◽  
Bing Li ◽  
Xia Zhang ◽  
...  
Keyword(s):  
Solid Acid ◽  
Reaction Times ◽  
Solvent Free ◽  
Multicomponent Synthesis ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Important Addition ◽  
High Yields ◽  
Work Up ◽  
Carbon Based

Coaled carbon-based solid acid (CCBSAC) is reported as a new, efficient and recyclable catalyst for the regioselective multicomponent synthesis of dihydropyrimidin-2(1H)-ones from aldehydes, β-ketoesters and urea or thiourea under solvent-free conditions. The structure and thermal stability of CCBSAC which resulted from ultra-clean coal resources mainly were characterized by IR, XRD, and TG. Nineteen dihydropyrimidin-2(1H)-ones examples were prepared and this catalyst could recycle up to 4 consecutive runs without losing its efficiency. The high yields of products, short reaction times, ease of work-up and clean procedure will make the present method a useful and important addition to the previous methodologies for the synthesis of dihydropyrimidin-2(1H)-ones.

scholarly journals K2FeZrP3O12 as an Efficient Catalyst for Friedel–Crafts Benzylation under Solvent-Free Conditions

2016 ◽  
Vol 24 (2) ◽  
pp. 102-111
Author(s):  
Nafisehsadat Sheikhan ◽  
Abdol R. Hajipour
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Sol Gel ◽  
Benzyl Bromide ◽  
Acid Catalyst ◽  
Solvent Free ◽  
Efficient Catalyst ◽  
Gel Method ◽  
Solvent Free Conditions ◽  
High Yields

Abstract K2FeZrP3O12 was prepared by sol-gel method and used as a mild and efficient solid acid catalyst for Friedel-Crafts benzylation of various arenes with benzyl bromide under solvent-free conditions. The method is green and has high yields.

Zirconium(IV) 4-sulphophenylethyliminobismethylphosphonate as an efficient and reusable catalyst for one-pot synthesis of 3,4-dihydropyrimidones under solvent-free conditions

2011 ◽  
Vol 65 (6) ◽  
Author(s):  
Xin-Bin Yang ◽  
Xiang-Kai Fu ◽  
Yu Huang ◽  
Ren-Quan Zeng
Keyword(s):  
Catalytic Activity ◽  
Elemental Analysis ◽  
Biginelli Reaction ◽  
Significant Loss ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
One Pot ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Simple Filtration

AbstractZirconium(IV) 4-sulphophenylethyliminobismethylphosphonate (ZSBEDP) was prepared and characterised by elemental analysis, IR, TG-DSC, and XRD. ZSBEDP was found to be an efficient catalyst for the Biginelli reaction of aromatic aldehyde, ethyl acetoacetate, and urea or thiourea under solvent-free conditions so as to give 3,4-dihydropyrimidones in good to excellent yields. The catalyst can be separated by simple filtration and reused without significant loss of its catalytic activity.

Solvent-free synthesis of β-enamino ketones and esters catalysed by recyclable iron(III) triflate

2014 ◽  
Vol 68 (8) ◽  
Author(s):  
Cheng-Liang Feng ◽  
Ning-Ning Chu ◽  
Shu-Guang Zhang ◽  
Jin Cai ◽  
Jun-Qing Chen ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Reaction System ◽  
Solvent Free ◽  
Primary Amines ◽  
Efficient Catalyst ◽  
Enamino Ketones ◽  
Minimal Loss ◽  
Solvent Free Conditions ◽  
High Yields ◽  
Solvent Free Synthesis

AbstractA novel application of highly stable Fe(OTf)3 as an efficient catalyst for the synthesis of a variety of β-enamino ketones and esters under solvent-free conditions is described. Notably, this protocol of a “green synthesis”, which produced β-enamino ketones and esters by the reaction of a variety of β-dicarbonyl compounds and primary amines, exhibits attractive properties including high yields, short reaction periods, lower loading of catalyst and chemo- and regio-selectivity. In addition, the catalyst was easily recovered from the reaction system and readily reused with minimal loss of activity.

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