scholarly journals An Efficient One-Pot Green Protocol for the Synthesis of 5-Unsubstituted 3,4-Dihydropyrimidin-2(1H)-Ones Using Recyclable Amberlyst 15 DRY as a Heterogeneous Catalyst via Three-Component Biginelli-Like Reaction

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Srinivasa Rao Jetti ◽  
Divya Verma ◽  
Shubha Jain
Keyword(s):  
Heterogeneous Catalyst ◽  
Solid Acid ◽  
Environmentally Benign ◽  
Chemical Waste ◽  
One Pot ◽  
Efficient Catalyst ◽  
Amberlyst 15 ◽  
Green Protocol ◽  
Recyclable Heterogeneous Catalyst ◽  
Work Up

An environmentally benign green protocol for the synthesis of 5-unsubstituted 3,4-dihydropyrimidin-2(1H)-ones using Amberlyst 15 DRY as a recyclable catalyst has been developed. The use of resinous, nontoxic, thermally stable, and inexpensive Amberlyst 15 DRY, as a recyclable heterogeneous catalyst, makes the process simple with negligible chemical waste. Among the various solid acid catalysts Amberlyst 15 DRY was found to be the most efficient catalyst with regard to reaction time, yield, and ease of work-up procedure.

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.

One-pot synthesis of furfural derivatives from pentoses using solid acid and base catalysts

2014 ◽  
Vol 4 (4) ◽  
pp. 971-978 ◽  
Author(s):  
Mahiro Shirotori ◽  
Shun Nishimura ◽  
Kohki Ebitani
Keyword(s):  
Solid Acid ◽  
Acid Base ◽  
One Pot ◽  
Amberlyst 15 ◽  
Base Catalysts ◽  
One Pot Synthesis ◽  
Combined Use ◽  
Acid And Base

One-pot synthesis of (2-furanylmethylene)malononitrile, a Knoevenagel product of furfural with malononitrile, from xylose efficiently proceeded by combined use of acid Amberlyst-15 and acid-base Cr/hydrotalcites in 44% yield.

Catalytic application of SO42−/Fe–ZrO2nanoparticles synthesized by a urea hydrolysis method for environmentally benign one pot synthesis of 1,8-dioxodecahydroacridines

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86179-86190 ◽  
Author(s):  
Sagnika Pradhan ◽  
B. G. Mishra
Keyword(s):  
Heterogeneous Catalyst ◽  
Mixed Oxides ◽  
Urea Hydrolysis ◽  
Environmentally Benign ◽  
One Pot ◽  
Hydrolysis Method ◽  
One Pot Synthesis ◽  
Catalytic Application

A series of sulfate grafted Fe2O3–ZrO2mixed oxides (SFexZr) were prepared by urea hydrolysis method and studied as heterogeneous catalyst for synthesis of structurally diverse 1,8-dioxodecahydroacridines.

An efficient one pot three-component nanocatalyzed synthesis of spiroheterocycles using TiO2 nanoparticles as a heterogeneous catalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 46415-46422 ◽  
Author(s):  
Yogesh Kumar Tailor ◽  
Sarita Khandelwal ◽  
Yogita Kumari ◽  
Kamlendra Awasthi ◽  
Mahendra Kumar
Keyword(s):  
Tio2 Nanoparticles ◽  
Heterogeneous Catalyst ◽  
Environmentally Benign ◽  
One Pot

An efficient, environmentally benign isocyanide-based domino protocol is presented for synthesizing spiroheterocycles with 2-amino benzothiazole/1,3,4-thiadiazole, cyclohexyl/tert-butyl isocyanides and isatines/cyclic carbonyls, catalyzed by recyclable nanocrystalline TiO2.

scholarly journals Chitosan Decorated Copper Nanoparticles as Efficient Catalyst for One-Pot Multicomponent Synthesis of Novel Quinoline Derivatives: Sustainable Perspectives

2018 ◽  
Author(s):  
Kahdijah S. Alghamdi ◽  
Nesreen S.I. Ahmed ◽  
D. Bakhotmah ◽  
Mohamed Mokhtar
Keyword(s):  
Copper Nanoparticles ◽  
Current Method ◽  
Product Yield ◽  
Reaction Yield ◽  
Quinoline Derivatives ◽  
Multicomponent Synthesis ◽  
High Turnover ◽  
One Pot ◽  
Efficient Catalyst ◽  
Green Protocol

Chitosan decorated copper nanoparticles catalysts (CSCuNPs) were synthesized via reduction methods utilizing green protocol. The CSCuNPs catalysts were tested for the synthesis of quinoline derivatives utilizing one-pot multicomponent reaction (MCR) under ultrasonic irradiation. The best catalyst (Cu-CS-NPs) that provided good conversion reaction yield and high turnover frequency (TOF) was characterized using FTIR, TGA, XRD, TEM and XPS techniques. Generalization of the scope of the proposed catalytic process was studied using different aldehydes. Excellent products yield and high TOF in even shorter reaction time (~5 min) was attained. Recyclability performance of the catalyst over five times re-use without detectable loss in product yield was recorded. The current method is green process utilizing environmentally benign catalyst and considered to be promising sustainable protocol for the synthesis of fine chemicals.

TiO2 Nanoparticles as an Efficient Catalyst for the One-pot Preparation of Tetrahydrobenzo[c]acridines in Aqueous Media

2013 ◽  
Vol 68 (4) ◽  
pp. 362-366 ◽  
Author(s):  
Shahrzad Abdolmohammadi ◽  
Mahdieh Mohammadnejad ◽  
Faezeh Shafaei
Keyword(s):  
Ammonium Acetate ◽  
Titanium Dioxide Nanoparticles ◽  
Aqueous Media ◽  
Aromatic Aldehydes ◽  
Catalytic Amount ◽  
One Pot ◽  
Efficient Catalyst ◽  
The One ◽  
Work Up ◽  
Operational Simplicity

A series of tetrahydrobenzo[c]acridinone derivatives have been prepared by a one-pot fourcomponent reaction of 1-naphthol, aromatic aldehydes, dimedone, and ammonium acetate in aqueous media using a catalytic amount of titanium dioxide nanoparticles (TiO2 NPs). The advantages of this novel protocol include the excellent yields, operational simplicity, short reaction time, easy work-up, reusability of the catalyst and an environmentally friendly procedure.

Diastereoselective Synthesis of Functionalised Trans-Tetrahydrobenzofuran-4-Ones in an Aqueous Medium by using DABCO as an Efficient Catalyst

2017 ◽  
Vol 41 (11) ◽  
pp. 657-660 ◽  
Author(s):  
Mohammad Reza Salari ◽  
Mohammad H. Mosslemin ◽  
Alireza Hassanabadi
Keyword(s):  
Aqueous Medium ◽  
High Purity ◽  
Reaction Times ◽  
Diastereoselective Synthesis ◽  
Efficient Synthesis ◽  
One Pot ◽  
Efficient Catalyst ◽  
Pyridinium Bromide ◽  
Work Up

A one-pot, efficient synthesis of 11 novel 2,3-diacylated trans-tetrahydrobenzofuran-4-one derivatives has been achieved via a three-component condensation of a N-(4-halophenacyl)-pyridinium bromide, a cyclic 1,3-diketone such as 5,5-dimethyl-1,3-cyclohexanedione (dimedone) or cyclohexane-1,3-dione and an arylglyoxal in the presence of catalytic amounts of 1,4-diaza-bicyclo[2.2.2]octane (DABCO) in water under reflux conditions. The attractive features of the method are excellent yields and high purity, short reaction times, easy work-up, and use of an inexpensive and non-toxic catalyst.

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