scholarly journals Scolecite as an efficient heterogeneous catalyst for the synthesis of 2,4,5-triarylimidazoles

2009 ◽  
Vol 7 (3) ◽  
pp. 550-554 ◽  
Author(s):  
Lakshman Gadekar ◽  
Shivshankar Mane ◽  
Santosh Katkar ◽  
Balasaheb Arbad ◽  
Machhindra Lande
Keyword(s):  
Heterogeneous Catalyst ◽  
Ammonium Acetate ◽  
Environmentally Benign ◽  
One Pot ◽  
Effective Catalyst ◽  
One Pot Synthesis ◽  
Three Component Reaction ◽  
The One ◽  
High Yields ◽  
Efficient Heterogeneous Catalyst

AbstractNatural scolecite has been found as an effective catalyst for the one-pot synthesis of 2,4,5-triarylimidazole derivatives via a three component reaction using benzil or benzoin, aldehydes and ammonium acetate. This method provides several advantages such as being environmentally benign, reusable, possessing high yields with increased variations of the substituents in the product and preparative simplicity.

CeCl3·7H2O as mild and efficient catalyst for the one-pot multicomponent synthesis of 8-aryl-7,8-dihydro[1,3]dioxolo[4,5-g]chromen-6-ones

2011 ◽  
Vol 76 (4) ◽  
pp. 235-241 ◽  
Author(s):  
Li-Qiang Wu ◽  
Wei-Lin Li ◽  
Fu-Lin Yan
Keyword(s):  
Aromatic Aldehydes ◽  
Environmentally Benign ◽  
Multicomponent Synthesis ◽  
One Pot ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
The One ◽  
High Yields ◽  
Work Up

A series of new 8-aryl-7,8-dihydro[1,3]dioxolo[4,5-g]chromen-6-ones were synthesized via a three-component reaction of 3,4-methylenedioxyphenol, aromatic aldehydes and Meldrum’s acid in the presence of CeCl3·7H2O under solvent-free conditions. The method provided several advantages such as easy work-up, high yields and environmentally benign procedure.

Tributylhexadecylphosphonium bromide: an efficient reagent system for the one-pot synthesis of 2,4,5-trisubstituted imidazoles

2015 ◽  
Vol 21 (2) ◽  
Author(s):  
Mohammad Heidari ◽  
Mohsen Rezaei ◽  
Rashid Badri
Keyword(s):  
Cost Effectiveness ◽  
Aromatic Aldehyde ◽  
Ammonium Acetate ◽  
Reaction Times ◽  
Environmentally Benign ◽  
Reaction Conditions ◽  
One Pot ◽  
One Pot Synthesis ◽  
The One ◽  
Efficient Reagent

AbstractThe reaction of benzil, an aromatic aldehyde, and ammonium acetate in ethanol at reflux in the presence of tributylhexadecylphosphonium bromide as catalyst affords a 2,4,5-trisubstituted imidazole. The present methodology offers several advantages over the literature methods, including excellent yields, shorter reaction times, environmentally benign milder reaction conditions, cost-effectiveness of catalyst, easy workup, and purification of products by nonchromatographic methods.

scholarly journals Pentafluoropropionic Acid: An Efficient and Metal-Free Catalyst for the One-Pot Synthesis of Tetrahydrobenzo[b]pyran Derivatives

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Naser Montazeri ◽  
Taghva Noghani ◽  
Mona Ghorchibeigy ◽  
Rozita Zoghi
Keyword(s):  
Reaction Time ◽  
Aromatic Aldehyde ◽  
One Pot ◽  
Short Reaction Time ◽  
Metal Free ◽  
One Pot Synthesis ◽  
Three Component Reaction ◽  
The One ◽  
High Yields

Pentafluoropropionic acid (PFPA) efficiently catalyzes the one-pot, three-component reaction of aromatic aldehyde, malononitrile, and dimedone to yield tetrahydrobenzo[b]pyran derivatives in high yields. This method is of great value because of its easy processing, short reaction time, environmentally, and high yields.

Zirconia Sulfuric Acid: An Efficient Heterogeneous Catalyst for the One-Pot Synthesis of 3,4-Dihydropyrimidinones Under Solvent-Free Conditions

2016 ◽  
Vol 146 (6) ◽  
pp. 1040-1049 ◽  
Author(s):  
Maliheh M. Hosseini ◽  
Eskandar Kolvari ◽  
Nadiya Koukabi ◽  
Maryam Ziyaei ◽  
Mohammad Ali Zolfigol
Keyword(s):  
Sulfuric Acid ◽  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
One Pot ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
The One ◽  
Efficient Heterogeneous Catalyst

One-Pot Three-Component Synthesis of 2,4,5-Triaryl-1H-imidazoles in the Presence of a Molecular Sieve Supported Titanium Catalyst under Mild Basic Conditions

Synlett ◽  
2018 ◽  
Vol 30 (01) ◽  
pp. 89-93 ◽  
Author(s):  
Zoltán Hell ◽  
Ágnes Magyar
Keyword(s):  
Heterogeneous Catalyst ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Ammonium Acetate ◽  
Condensation Reaction ◽  
Significant Loss ◽  
One Pot ◽  
One Pot Condensation ◽  
The One ◽  
Efficient Heterogeneous Catalyst

A series of 2,4,5-trisubstituted-imidazoles has been synthesized with good to excellent yields by the one-pot condensation reaction of 1,2-dicarbonyl compounds, benzaldehydes, and ammonium acetate in the presence of 4 Å molecular sieves modified with titanium(IV) as an efficient heterogeneous catalyst. The catalyst could be recovered easily and reused without significant loss of activity.

scholarly journals A novel superparamagnetic powerful guanidine-functionalized γ-Fe2O3 based sulfonic acid recyclable and efficient heterogeneous catalyst for microwave-assisted rapid synthesis of quinazolin-4(3H)-one derivatives in Green media

RSC Advances ◽  
2021 ◽  
Vol 11 (48) ◽  
pp. 29948-29959
Author(s):  
Fateme Haji Norouzi ◽  
Naser Foroughifar ◽  
Alireza Khajeh-Amiri ◽  
Hoda Pasdar
Keyword(s):  
Heterogeneous Catalyst ◽  
Sulfonic Acid ◽  
Condensation Reaction ◽  
Rapid Synthesis ◽  
One Pot ◽  
Green Catalyst ◽  
Microwave Assisted ◽  
One Pot Synthesis ◽  
The One ◽  
Efficient Heterogeneous Catalyst

A novel organic–inorganic nanohybrid superparamagnetic nanocatalyst (γ-Fe2O3@CPTMS–guanidine@SO3H) represents an efficient and green catalyst for the one-pot synthesis of quinazolin-4(3H)-one derivatives via a three-component condensation reaction.

Two Efficient One-Pot Approaches for Regioselective Synthesis of New 3-Arylpyridazino[4,3-c]quinolin-5(6H)-ones

2015 ◽  
Vol 68 (10) ◽  
pp. 1529 ◽  
Author(s):  
Mehdi Rimaz
Keyword(s):  
Hydrazine Hydrate ◽  
Regioselective Synthesis ◽  
Reaction Conditions ◽  
One Pot ◽  
One Pot Synthesis ◽  
Three Component Reaction ◽  
The One ◽  
High Yields ◽  
Arylglyoxal Monohydrates ◽  
Operational Simplicity

Two efficient regioselective approaches for the one-pot synthesis of 3-arylpyridazino[4,3-c]quinolin-5(6H)-one derivatives are reported, by the three-component reaction of arylglyoxal monohydrates, quinoline-2,4-diol, and hydrazinium dihydrochloride or hydrazine hydrate in ethanol and pyridine. In ethanol, the reactions were catalyzed by 1,4-diazobicyclo[2,2,2]octane. The features of both procedures are high regioselectivity, mild reaction conditions, good to high yields, and operational simplicity.

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