Surface modified SPIONs-Cr(VI) ions-immobilized organic-inorganic hybrid as a magnetically recyclable nanocatalyst for rapid synthesis of polyhydroquinolines under solvent-free conditions at room temperature

2018 ◽  
Vol 32 (4) ◽  
pp. e4245 ◽  
Author(s):  
Ali Maleki ◽  
Negar Hamidi ◽  
Saied Maleki ◽  
Jamal Rahimi
Keyword(s):  
Room Temperature ◽  
Solvent Free ◽  
Rapid Synthesis ◽  
Inorganic Hybrid ◽  
Solvent Free Conditions ◽  
Surface Modified

Nanomagnetic organic–inorganic hybrid (Fe@Si-Gu-Prs): a novel magnetically green catalyst for the synthesis of tetrahydropyridine derivatives at room temperature under solvent-free conditions

Tetrahedron ◽  
2015 ◽  
Vol 71 (3) ◽  
pp. 436-444 ◽  
Author(s):  
Hossein Eshghi ◽  
Amir Khojastehnezhad ◽  
Farid Moeinpour ◽  
Shima Rezaeian ◽  
Mehdi Bakavoli ◽  
...  
Keyword(s):  
Room Temperature ◽  
Solvent Free ◽  
Green Catalyst ◽  
Inorganic Hybrid ◽  
Solvent Free Conditions

Preparation and Characterization of a Novel Room Temperature Dicationic Ionic Liquid and its Application in the Synthesis of Xanthenediones Under Solvent-Free Conditions

2018 ◽  
Vol 21 (8) ◽  
pp. 602-608 ◽  
Author(s):  
Zainab Ehsani-Nasab ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Reaction Times ◽  
Significant Loss ◽  
Solvent Free ◽  
Acidity Function ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Hammett Acidity Function ◽  
Dicationic Ionic Liquid

Aim and Objective: In the present work, 1, 1’-sulfinyldiethylammonium bis (hydrogen sulfate) as a novel room temperature dicationic ionic liquid was synthesized and used as a catalyst for xanthenediones synthesis. Material and Method: The dicationic ionic liquid has been synthesized using ethylamine and thionyl chloride as precursors. Then, by the reaction of [(EtNH2)2SO]Cl2 with H2SO4, [(EtNH2)2SO][HSO4]2 was prepared and after that, it was characterized by FT-IR, 1H NMR, 13C NMR as well as Hammett acidity function. This dicationic ionic liquid was used as a catalyst for the synthesis of xanthenediones via condensation of structurally diverse aldehydes and dimedone under solvent-free conditions. The progress of the reaction was monitored by thin layer chromatography (ethyl acetate/n-hexane = 3/7). Results: An efficient solvent-free method for the synthesis of xanthenediones has been developed in the presence of [(EtNH2)2SO][HSO4]2 as a powerful catalyst with high to excellent yields, and short reaction times. Additionally, recycling studies have demonstrated that the dicationic ionic liquid can be readily recovered and reused at least four times without significant loss of its catalytic activity. Conclusion: This new dicationic ionic liquid can act as a highly efficient catalyst for xanthenediones synthesis under solvent-free conditions.

Efficient Synthesis of Tetrahydrobenzo[b]pyrans under Solvent‐Free Conditions at Room Temperature

2006 ◽  
Vol 36 (16) ◽  
pp. 2363-2369 ◽  
Author(s):  
Liangce Rong ◽  
Xiaoyue Li ◽  
Haiying Wang ◽  
Daqing Shi ◽  
Shujiang Tu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
Solvent Free Conditions

Synthesis of 1,1-diacetates from Aromatic Aldehydes using Cerium(IV) Sulfate Tetrahydrate as Catalyst under Solvent-free Conditions

2005 ◽  
Vol 2005 (3) ◽  
pp. 171-172 ◽  
Author(s):  
Min Zhang ◽  
Yi-Qun Li
Keyword(s):  
Room Temperature ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Excellent Yield ◽  
Solvent Free Conditions

Aromatic aldehydes can be converted into the corresponding 1,1-diacetates rapidly in the presence of catalytic amounts of Ce(SO4)2·4H2O at room temperature in excellent yield under solvent-free conditions. The catalyst can easily be recovered and reused at least 4 times.

Indium(III) Bromide: A Novel and Efficient Reagent for the Rapid Synthesis of 1,5-Benzodiazepines under Solvent-Free Conditions

Synthesis ◽  
2005 ◽  
Vol 2005 (03) ◽  
pp. 480-484 ◽  
Author(s):  
J. S. Yadav ◽  
B. V. Reddy ◽  
S. Praveenkumar ◽  
K. Nagaiah
Keyword(s):  
Solvent Free ◽  
Rapid Synthesis ◽  
Solvent Free Conditions ◽  
Efficient Reagent

Surface modification of ferrite nanoparticles with dicarboxylic acids for the synthesis of 5-hydroxymethylfurfural: a novel and green protocol

RSC Advances ◽  
2016 ◽  
Vol 6 (80) ◽  
pp. 76795-76801 ◽  
Author(s):  
Melad Shaikh ◽  
Mahendra Sahu ◽  
Kiran Kumar Atyam ◽  
Kalluri V. S. Ranganath
Keyword(s):  
Surface Modification ◽  
Dicarboxylic Acids ◽  
Ferrite Nanoparticles ◽  
Solvent Free ◽  
Green Protocol ◽  
Flexible Ligand ◽  
Solvent Free Conditions ◽  
Surface Modified

5-Hydroxymethylfurfural (5-HMF) has been synthesized under solvent free conditions using surface modified ferrite nanoparticles. The flexible ligand modified ferrites showed higher activity than rigid modified ferrites.

Solid lithium perchlorate as a powerful catalyst for the synthesis of β-aminoalcohols under solvent-free conditions

2005 ◽  
Vol 83 (5) ◽  
pp. 505-507 ◽  
Author(s):  
Najmodin Azizi ◽  
Mohammad R Saidi
Keyword(s):  
Ring Opening ◽  
Room Temperature ◽  
Lithium Perchlorate ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Reaction Proceeds ◽  
Ring Opening Of Epoxides ◽  
Neutral Conditions ◽  
Hindered Amines ◽  
Short Times

Lithium perchlorate catalyzed the ring opening of epoxides with amines to provide the corresponding β-aminoalcohols in excellent yields with high regioselectivity. The reaction proceeds rapidly under mild and neutral conditions and worked well with primary, secondary, aliphatic, aromatic, and hindered amines in short times at room temperature, in the absence of solvent.Key words: epoxide, lithium perchlorate, β-aminoalcohols, solvent-free.

scholarly journals A Facile Solvent-Free Route for One-Pot Multicomponent Synthesis of Benzylpyrazolyl Coumarins Derivatives in Presence of Effective Synergetic Catalytic System

2019 ◽  
Vol 31 (6) ◽  
pp. 1357-1361 ◽  
Author(s):  
NARENDRA R. KAMBLE ◽  
VINOD T. KAMBLE
Keyword(s):  
Room Temperature ◽  
Silver Salt ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Multicomponent Synthesis ◽  
One Pot ◽  
Niobium Pentachloride ◽  
Solvent Free Conditions ◽  
Work Up ◽  
Solvent Free Reaction

A combinatorial library of benzylpyrazolyl coumarin derivatives have been synthesized by a green one-pot four-component reaction between aryl hydrazine/hydrazine hydrate (1), ethyl acetoacetate (2), aromatic aldehydes (3) and 4-hydroxycoumarin (4) catalyzed by niobium pentachloride with silver salt under solvent-free conditions has been developed. Experimental simplicity, simple work-up procedure and solvent-free reaction condition at room temperature are important features of the present protocol.

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