Solvent-free oxidation of dec-1-ene using gold/graphite catalyst using an in situ generated oxidant

2015 ◽  
Vol 5 (2) ◽  
pp. 1307-1313 ◽  
Author(s):  
Upendra Nath Gupta ◽  
Hamed Alshammari ◽  
Nicholas F. Dummer ◽  
Robert L. Jenkins ◽  
Donald Bethell ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Batch Reactor ◽  
Solvent Free ◽  
Radical Initiator ◽  
Solvent Free Conditions ◽  
Free Oxidation

The oxidation of dec-1-ene is investigated under solvent-free conditions using gold nanoparticles supported on graphite and in a batch reactor in the presence of a radical initiator using oxygen from air as the terminal oxidant.

Pd/ZrO2: An Efficient Catalyst for Liquid Phase Oxidation of Toluene in Solvent Free Conditions

2017 ◽  
Vol 15 (2) ◽  
Author(s):  
Mohsin Siddique ◽  
Muhammad Saeed ◽  
Mohammad Ilyas ◽  
Hussain Gulab
Keyword(s):  
Batch Reactor ◽  
Catalytic Efficiency ◽  
Catalytic Performance ◽  
Solvent Free ◽  
Catalyst Loading ◽  
Similar Reaction ◽  
Reaction Conditions ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Free Oxidation

Abstract 0.1 % Pd/ZrO2 was synthesized and characterized by various physicochemical techniques and was successfully used as catalyst for solvent free oxidation of toluene in the presence of molecular oxygen using batch reactor. The catalytic performance of Pd/ZrO2 was explored in terms of effect of catalyst loading, reaction time, temperature and partial pressure of oxygen on oxidation of toluene in solvent free conditions. Pd/ZrO2 was found as a stable catalyst under the reaction conditions. Used catalyst exhibited the same catalytic efficiency as fresh catalyst under similar reaction conditions. Reaction was taking place according to Langmuir-Hinshelwood type of mechanism.

scholarly journals Efficient Solvent-free Oxidation of Benzylic and Aromatic Allylic Alcohols and Biaryl Acyloins by Manganese Dioxide and Barium Manganate

1999 ◽  
Vol 23 (3) ◽  
pp. 236-237
Author(s):  
Habib Firouzabadi ◽  
Babak Karimi ◽  
Mohammad Abbassi
Keyword(s):  
Manganese Dioxide ◽  
Solvent Free ◽  
Allylic Alcohols ◽  
Solvent Free Conditions ◽  
Free Oxidation

Active manganese dioxide and commercially available barium manganate are used for the efficient oxidation of benzylic and aromatic allylic alcohols and biaryl acyloins under solvent-free conditions.

Solvent-free oxidation of 1-phenylethanol catalysed by gold nanoparticles supported on carbon powder materials

2020 ◽  
Vol 357 ◽  
pp. 22-31 ◽  
Author(s):  
Sónia A.C. Carabineiro ◽  
Ana P.C. Ribeiro ◽  
Josephus G. Buijnsters ◽  
Miguel Avalos-Borja ◽  
Armando J.L. Pombeiro ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Solvent Free ◽  
Carbon Powder ◽  
Powder Materials ◽  
Free Oxidation

Environmentally Friendly Organic Synthesis Using Bismuth Compounds. Bismuth Trifluoromethanesulfonate-Catalyzed Allylation of Dioxolanes

2008 ◽  
Vol 61 (6) ◽  
pp. 419 ◽  
Author(s):  
Matthew J. Spafford ◽  
James E. Christensen ◽  
Matthew G. Huddle ◽  
Joshua R. Lacey ◽  
Ram S. Mohan
Keyword(s):  
Organic Synthesis ◽  
Multicomponent Reaction ◽  
Scale Up ◽  
Environmentally Friendly ◽  
Solvent Free ◽  
Bismuth Compounds ◽  
Solvent Free Conditions ◽  
In Situ Derivatization

A bismuth trifluoromethanesulfonate (triflate)-catalyzed (2.0 mol-%) multicomponent reaction involving the allylation of dioxolanes followed by in situ derivatization with anhydrides to generate highly functionalized esters has been developed under solvent-free conditions. Most reagents used to date for allylation of dioxolanes are highly corrosive and are often required in stoichiometric amounts. In contrast, the use of a relatively non-toxic and non-corrosive bismuth(iii)-based catalyst makes this methodology especially attractive for scale-up.

Ethyl acrylate conjugated polystyryl-diphenylphosphine — An extremely efficient catalyst for Henry reaction under solvent-free conditions (SolFC)

2013 ◽  
Vol 91 (4) ◽  
pp. 300-306 ◽  
Author(s):  
Lalthazuala Rokhum ◽  
Ghanashyam Bez
Keyword(s):  
Ethyl Acrylate ◽  
Solid Support ◽  
Solvent Free ◽  
Stoichiometric Ratio ◽  
Henry Reaction ◽  
Efficient Catalyst ◽  
Fast Growing ◽  
Solvent Free Conditions ◽  
Polymer Supported

Over the last few decades, the fast-growing development of polymer supported reagents has led to the synthesis of a variety of reagents on solid support. Some of the major advantages of using such reagents are that they are less hygroscopic, easy to recover, and can be recycled. Here, we have demonstrated that in situ generated ethyl acrylate conjugated polystyryl-diphenylphosphine (PDPP–EA) derived from the reaction of a mixture of polystyryl-diphenylphosphine and ethyl acrylate in a stoichiometric ratio can efficiently catalyze the synthesis of β-nitroalcohols from the reaction of aldehydes and nitroalkanes under solvent-free conditions (SolFC).

scholarly journals Investigation on the reactivity of α-azidochalcones with carboxylic acids: Formation of α-amido-1,3-diketones and highly substituted 2-(trifluoromethyl)oxazoles

2015 ◽  
Vol 11 ◽  
pp. 2021-2028 ◽  
Author(s):  
Kandasamy Rajaguru ◽  
Arumugam Mariappan ◽  
Rajendran Suresh ◽  
Periasamy Manivannan ◽  
Shanmugam Muthusubramanian
Keyword(s):  
Microwave Irradiation ◽  
Carboxylic Acids ◽  
Trifluoroacetic Acid ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
In Situ Formation ◽  
Lower Temperature

The reaction of α-azidochalcones with carboxylic acids has been investigated resulting in the formation of α-amido-1,3-diketones under microwave irradiation via in situ formation of 2H-azirine intermediates. An interesting reaction is described wherein, with trifluoroacetic acid at lower temperature, it affords highly substituted 2-(trifluoromethyl)oxazoles. These flexible transformations proceed under solvent free conditions in good to excellent yields without any catalyst.

scholarly journals 1-n-Butyl-3-methylimidazolium-2-carboxylate: a versatile precatalyst for the ring-opening polymerization of ε-caprolactone and rac-lactide under solvent-free conditions

2013 ◽  
Vol 9 ◽  
pp. 647-654 ◽  
Author(s):  
Astrid Hoppe ◽  
Faten Sadaka ◽  
Claire-Hélène Brachais ◽  
Gilles Boni ◽  
Jean-Pierre Couvercelle ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Ring Opening ◽  
Gel Permeation Chromatography ◽  
Ring Opening Polymerization ◽  
Solvent Free ◽  
Scanning Calorimetry ◽  
H Nmr ◽  
Solvent Free Conditions ◽  
Gel Permeation

The ring-opening polymerization of ε-caprolactone (ε-CL) and rac-lactide (rac-LA) under solvent-free conditions and using 1-n-butyl-3-methylimidazolium-2-carboxylate (BMIM-2-CO2) as precatalyst is described. Linear and star-branched polyesters were synthesized by successive use of benzyl alcohol, ethylene glycol, glycerol and pentaerythritol as initiator alcohols, and the products were fully characterized by 1H and 13C{1H} NMR spectroscopy, gel permeation chromatography (GPC), and differential scanning calorimetry (DSC). BMIM-2-CO2 acts as an N-heterocyclic carbene precursor, resulting from in situ decarboxylation, either by heating under vacuo (method A) or by addition of NaBPh4 (method B). Possible catalytic and deactivation mechanisms are proposed.

Efficient, microwave-assisted intramolecular 1,3-dipolar cycloadditions of oximes and N-methylnitrones derived from o-alkenylmethoxy-acetophenones

2005 ◽  
Vol 83 (3) ◽  
pp. 260-265 ◽  
Author(s):  
Surinderjit Singh ◽  
M PS Ishar ◽  
Gajendra Singh ◽  
Rajinder Singh
Keyword(s):  
Microwave Irradiation ◽  
Microwave Heating ◽  
Reaction Times ◽  
Solvent Free ◽  
Dipolar Cycloadditions ◽  
Microwave Assisted ◽  
Solvent Free Conditions ◽  
A Minor ◽  
Acetophenone Oxime

Contrary to literature reports, the o-allyloxy- and crotyloxy-acetophenone-oximes (2a, 2b) are transformed to nitrones, which undergo regio- and stereoselective intramolecular 1,3-dipolar cycloadditions, both on microwave heating under solvent free conditions and refluxing in toluene, to afford novel cycloadducts (5a, 5b); the oxazepine-N-oxide (3a) reported to be formed in 98% yield was obtained only as a minor product (~10%). However, o-cinnamyloxy-acetophenone-oxime (2c) under similar conditions undergoes intramolecular N-alkylation to afford nitrone (3c). The reactions carried out under microwave irradiation are cleaner, require shorter reaction times, and have higher yields. Corresponding intramolecular 1,3-dipolar cycloadditions of N-methylnitrones (B), generated in situ from o-alkenylmethoxy-acetophenones (1a–1c) and N-methylhydroxylamine under solvent-free microwave irradiation conditions, are completely regio- and stereoselective, require much shorter reaction times, and afford adducts (4a–4c) in higher yields, as compared with their thermal counterparts.Key words: cycloadditions, nitrones, oximes, o-alkenylmethoxy-acetophenones, microwave, isoxazolidines.

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