scholarly journals CeCl3⋅7H2O/SiO2as an Efficient and Recyclable Catalyst for the Synthesis of Dihydropyrano[3,2-b]chromenediones

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Chong Zhang ◽  
Yan Qu
Keyword(s):  
Kojic Acid ◽  
Aromatic Aldehydes ◽  
Catalytic Amount ◽  
Recyclable Catalyst ◽  
Solvent Free ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
High Yields

Dihydropyrano[3,2-b]chromenedione derivatives were synthesized in moderate-to-high yields in one-pot three-component reaction from the corresponding aromatic aldehydes, kojic acid, and dimedone, in the presence of catalytic amount ofCeCl3⋅7H2O/SiO2as a nontoxic, reusable, inexpensive, and easily available reagent, under solvent-free conditions.

scholarly journals Trichloroisocyanuric acid, a New and Efficient Catalyst for the Synthesis of 2′- Aminobenzothiazolo-arylmethyl-2-naphthols

2012 ◽  
Vol 9 (4) ◽  
pp. 2424-2428 ◽  
Author(s):  
Limin Yang
Keyword(s):  
Aromatic Aldehydes ◽  
Catalytic Amount ◽  
Solvent Free ◽  
One Pot ◽  
Efficient Catalyst ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
Trichloroisocyanuric Acid

An efficient one-pot synthesis of 2′-aminobenzothiazolo-arylmethyl-2-naphthols is described. This involves the three-component reaction ofβ-naphthol, aromatic aldehydes and 2-aminobenzothiazole in the presence of a catalytic amount of trichloroisocyanuric acid under solvent-free conditions.

scholarly journals Three-component reaction of β-keto esters, aromatic aldehydes and urea/thiourea promoted by caffeine, a green and natural, biodegradable catalyst for eco-safe Biginelli synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones derivatives under solvent-free conditions

2018 ◽  
Vol 83 (6) ◽  
pp. 673-684 ◽  
Author(s):  
Farzaneh Mohamadpour ◽  
Mojtaba Lashkari
Keyword(s):  
Biginelli Reaction ◽  
Reaction Times ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Solid Catalyst ◽  
One Pot ◽  
Keto Esters ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
High Yields

Caffeine was found to be a natural and green and biodegradable catalyst for the one-pot, three-component condensation Biginelli reaction of ?-keto esters, aromatic aldehydes and urea/thiourea to afford the corresponding 3,4-dihydropyrimidin-2(1H)-ones/thiones derivatives under solvent-free conditions. The remarkable features of this green procedure are high yields, short reaction times, simplicity of operation and work-up procedures, the availability and easy handling of this solid catalyst, avoidance of hazardous or toxic catalysts and organic solvents and economic availability of the catalyst.

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.

scholarly journals Efficient Synthesis of 1-Amidoalkyl-2-Naphthols by One-Pot, Three-Component Reaction under Solvent-Free Conditions

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Zahed Karimi-Jaberi ◽  
Marziyeh Jokar ◽  
S. Zoleykha Abbasi
Keyword(s):  
Trichloroacetic Acid ◽  
Reaction Times ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
One Pot Condensation ◽  
High Yields ◽  
Free Media

Two efficient and direct procedures have been developed for the preparation of 1-amidoalkyl-2-naphthols by a one-pot condensation of aldehydes, 2-naphthol, and amides in the presence of trichloroacetic acid or cobalt (II) chloride as catalyst. The reactions were carried out under solvent-free media. High yields, short reaction times, easy workup of the catalyst are advantages of these procedures.

scholarly journals An Efficient and Green Procedure for the Synthesis of 2,4,6-Triarylpyridines Using PPA-SiO2as a Reusable Heterogeneous Catalyst Under Solvent-Free Conditions

2012 ◽  
Vol 9 (4) ◽  
pp. 2037-2043 ◽  
Author(s):  
Abolghasem Davoodnia ◽  
Bahareh Razavi ◽  
Niloofar Tavakoli-Hoseini
Keyword(s):  
Heterogeneous Catalyst ◽  
Simple Procedure ◽  
Substantial Reduction ◽  
Reaction Times ◽  
Solvent Free ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
High Yields ◽  
Work Up

Silica gel-supported polyphosphoric acid (PPA-SiO2) was found to be highly efficient, eco-friendly and recyclable heterogeneous catalyst for the synthesis of 2,4,6-triarylpyridines through one-pot three-component reaction of acetophenone, aryl aldehydes, and ammonium acetate under solvent-free conditions. This method has several advantages, such as simple procedure with an easy work-up, short reaction times, and high yields. Furthermore, the catalyst could be recycled after a simple work-up, and used at least three times without substantial reduction in its catalytic activity.

scholarly journals Fe3o4 nanoparticles: A highly efficient and easily reusable catalyst for the one-pot synthesis of xanthene derivatives under solvent-free conditions

2013 ◽  
Vol 78 (6) ◽  
pp. 769-779 ◽  
Author(s):  
Ali Ghasemzadeh ◽  
Javad Safaei-Ghomi ◽  
Safura Zahedi
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Reaction Times ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Xanthene Derivatives ◽  
The One ◽  
High Yields

Magnetically separable Fe3O4 nanoparticles supply environmentally friendly procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene and 1,8-dioxo-octahydro-xanthene derivatives. These compounds were obtained in high yields and short reaction times by the reaction of dimedone and 2-naphthol with various aromatic aldehydes under solvent-free conditions. The catalyst coluld be easily recovered using an external magnet and reused for six cycles with almost consistent activity.

MOF-5 as a highly efficient and recyclable catalyst for one pot synthesis of 2,4-disubstituted quinoline derivatives

2020 ◽  
Vol 44 (20) ◽  
pp. 8614-8620 ◽  
Author(s):  
Song-Tao Xiao ◽  
Cui-Ting Ma ◽  
Jia-Qi Di ◽  
Zhan-Hui Zhang
Keyword(s):  
Aromatic Amines ◽  
Recyclable Catalyst ◽  
Solvent Free ◽  
Quinoline Derivatives ◽  
One Pot ◽  
Highly Efficient ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Three Component Reaction

An approach was developed for the synthesis of 2,4-disubstituted quinoline derivatives via a one pot three-component reaction of aromatic amines, aldehydes and alkynes catalyzed by MOF-5 under solvent-free conditions.

scholarly journals Melamine Trisulfonic Acid: An Efficient, Heterogeneous and Reusable Catalyst for the Synthesis of 10-Aryl-6,8-dimethyl- 6, 10-dihydro-5-oxa-6,8-diazaanthra [2,3-d][1,3]dioxole- 7,9-diones

2011 ◽  
Vol 8 (4) ◽  
pp. 1972-1978 ◽  
Author(s):  
Weilin Li ◽  
Qiuyan Luo
Keyword(s):  
Aromatic Aldehydes ◽  
Recyclable Catalyst ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
One Pot ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Different Types ◽  
The One ◽  
Melamine Trisulfonic Acid

Melamine trisulfonic acid was used as an efficient and recyclable catalyst for the one-pot synthesis of 10-aryl-6,8-dimethyl-6,10-dihydro-5-oxa-6,8-diazaanthra[2,3-d][1,3]dioxole-7,9-diones by condensation of 3,4-methylene dioxyphenol, aromatic aldehydes and 1,3-dimethylbarbituric acid under solvent-free conditions. Different types of aromatic. aldehydes were used in the reaction and in all cases the products were obtained in good to excellent yields.

Study of the Catalytic Activity of Zr(HPO4)2 in the Synthesis of Hexahydroquinoline Derivatives under Solvent-free Conditions

2013 ◽  
Vol 68 (2) ◽  
pp. 195-200 ◽  
Author(s):  
Shahrzad Abdolmohammadi
Keyword(s):  
Catalytic Activity ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
One Pot ◽  
Solvent Free Conditions ◽  
The One ◽  
High Yields

2-Amino-7,7-dimethyl-5-oxo-1,4-diaryl-1,4,5,6,7,8-hexahydroquinoline-3-carbonitrile derivatives were synthesized by the one-pot four-component reaction of aromatic aldehydes, malononitrile, dimedone and arylamines in the presence of Zr(HPO4)2·H2O (α-ZrP) as an effective and recyclable solid acid catalyst, in high yields.

Chlorosulfonic Acid Supported Piperidine-4-carboxylic Acid (PPCA) Functionalized Fe3O4 Nanoparticles (Fe3O4-PPCA): The Efficient, Green and Reusable Nanocatalyst for the Synthesis of Pyrazolyl Coumarin Derivatives under Solvent-Free Conditions

2019 ◽  
Vol 22 (2) ◽  
pp. 123-128
Author(s):  
Setareh Habibzadeh ◽  
Hassan Ghasemnejad-Bosra ◽  
Mina Haghdadi ◽  
Soheila Heydari-Parastar
Keyword(s):  
Carboxylic Acid ◽  
Fe3o4 Nanoparticles ◽  
High Efficiency ◽  
Reaction Times ◽  
Chlorosulfonic Acid ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Magnetic Nanocatalyst ◽  
One Pot ◽  
Solvent Free Conditions

Background: In this study, we developed a convenient methodology for the synthesis of coumarin linked to pyrazolines and pyrano [2,3-h] coumarins linked to 3-(1,5-diphenyl-4,5- dihydro-1H-pyrazol-3-yl)-chromen-2-one derivatives using Chlorosulfonic acid supported Piperidine-4-carboxylic acid (PPCA) functionalized Fe3O4 nanoparticles (Fe3O4-PPCA) catalyst. Materials and Methods:: Fe3O4-PPCA was investigated as an efficient and magnetically recoverable Nanocatalyst for the one-pot synthesis of substituted coumarins from the reaction of coumarin with a variety of aromatic aldehydes in high to excellent yield at room temperature under solvent-free conditions. The magnetic nanocatalyst can be easily recovered by applying an external magnet device and reused for at least 10 reaction runs without considerable loss of reactivity. Results and Conclusion: The advantages of this protocol are the use of commercially available materials, simple and an inexpensive procedure, easy separation, and an eco-friendly procedure, and it shows good reaction times, good to high yields, inexpensive and practicability procedure, and high efficiency.

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