Microwave-assisted oxidation of alcohols by hydrogen peroxide catalysed by tetrabutylammonium decatungstate

2013 ◽  
Vol 67 (9) ◽  
Author(s):  
Mateusz Galica ◽  
Wiktor Kasprzyk ◽  
Szczepan Bednarz ◽  
Dariusz Bogdał
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Microwave Irradiation ◽  
Solvent System ◽  
Elevated Pressure ◽  
Phase System ◽  
Two Phase ◽  
Microwave Assisted ◽  
Optimum Parameters ◽  
Oxidation Of Alcohols

AbstractThis work deals with catalytic activity of tetrabutylammonium decatungstate(VI) in the oxidation of selected alcohols with hydrogen peroxide as an oxidant using 1,2-dichloroethane/water or acetonitrile/water as a solvent system. Different forms of heating were compared. The highest conversions of substrates were achieved in the two phase system acetonitrile/water using microwave irradiation combined with elevated pressure. Finally, optimum parameters for these reactions in a microwave pressurised reactor were established and discussed.

scholarly journals Microwave-assisted Oxidation of Alcohols by Pyridinium Chlorochromate

1999 ◽  
Vol 23 (2) ◽  
pp. 118-119
Author(s):  
Vaishali Chakraborty ◽  
Manobjyoti Bordoloi
Keyword(s):  
Microwave Irradiation ◽  
Pyridinium Chlorochromate ◽  
Microwave Assisted ◽  
Oxidation Of Alcohols

An efficient and mild methodology for the oxidation of alcohols to the corresponding carbonyl functions is described using pyridinium chlorochromate under microwave irradiation.

scholarly journals Cu(II) and Fe(III) Complexes Derived from N-Acetylpyrazine-2-Carbohydrazide as Efficient Catalysts Towards Neat Microwave Assisted Oxidation of Alcohols

Catalysts ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1053 ◽  
Author(s):  
Manas Sutradhar ◽  
Tannistha Roy Barman ◽  
Armando J. L. Pombeiro ◽  
Luísa M. D. R. S. Martins
Keyword(s):  
Catalytic Activity ◽  
Ir Spectroscopy ◽  
Maximum Yield ◽  
Catalytic Efficiency ◽  
Benzyl Alcohols ◽  
X Ray ◽  
X Ray Crystallography ◽  
Microwave Assisted ◽  
Tert Butyl Hydroperoxide ◽  
Oxidation Of Alcohols

The mononuclear Cu(II) complex [Cu((kNN′O-HL)(H2O)2] (1) was synthesized using N-acetylpyrazine-2-carbohydrazide (H2L) and characterized by elemental analysis, IR spectroscopy, ESI-MS and single crystal X-ray crystallography. Two Fe(III) complexes derived from the same ligand viz, mononuclear [Fe((kNN′O-HL)Cl2] (2) and the binuclear [Fe(kNN′O-HL)Cl(μ-OMe)]2 (3) (synthesized as reported earlier), were also used in this study. The catalytic activity of these three complexes (1–3) was examined towards the oxidation of alcohols using tert-butyl hydroperoxide (TBHP) as oxidising agent under solvent-free microwave irradiation conditions. Primary and secondary benzyl alcohols (benzyl alcohol and 1-phenylethanol), and secondary aliphatic alcohols (cyclohexanol) were used as model substrates for this study. A comparison of their catalytic efficiency was performed. Complex 1 exhibited the highest activity in the presence of TEMPO as promoter for the oxidation of 1-phenylethanol with a maximum yield of 91.3% of acetophenone.

Two‐Phase System Utilizing Hydrophobic Metal–Organic Frameworks (MOFs) for Photocatalytic Synthesis of Hydrogen Peroxide

2019 ◽  
Vol 131 (16) ◽  
pp. 5456-5460 ◽  
Author(s):  
Yusuke Isaka ◽  
Yudai Kawase ◽  
Yasutaka Kuwahara ◽  
Kohsuke Mori ◽  
Hiromi Yamashita
Keyword(s):  
Hydrogen Peroxide ◽  
Metal Organic Frameworks ◽  
Phase System ◽  
Two Phase ◽  
Metal Organic ◽  
Photocatalytic Synthesis

Influence of Compressed Carbon Dioxide on the Oxidation of Cyclohexane with Hydrogen Peroxide in Acetic Acid

2006 ◽  
Vol 59 (3) ◽  
pp. 225 ◽  
Author(s):  
Liang Gao ◽  
Tao Jiang ◽  
Buxing Han ◽  
Baoning Zong ◽  
Xiaoxin Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Binary System ◽  
Reaction System ◽  
Phase Region ◽  
Phase Behaviour ◽  
Phase System ◽  
Two Phase ◽  
Three Phase

The oxidation of cyclohexane with H2O2 in a compressed CO2/acetic acid binary system was studied at 60.0 and 80.0°C, at pressures up to 18 MPa, and with the zeolite TS-1 as catalyst. The phase behaviour of the reaction system was also observed. There are three fluid phases in the reaction system at lower pressure but two at higher pressures. In the three-phase region the yields of the products, cyclohexanol and cyclohexanone, increase considerably with increasing pressure and reaches a maximum near the phase-separating pressure. CO2 can thus enhance the reaction effectively. However, the effect of pressure on the yield is very limited after the transition to a two-phase system.

Metalloporphyrin catalytic oxidations of hydrocarbons by H2O2

2000 ◽  
Vol 04 (06) ◽  
pp. 599-604 ◽  
Author(s):  
ANTÓNIO M. d'A. ROCHA GONSALVES ◽  
ARMÉNIO C. SERRA
Keyword(s):  
Hydrogen Peroxide ◽  
Benzoic Acid ◽  
Catalytic Oxidation ◽  
Phase System ◽  
Two Phase ◽  
Catalytic Oxidations ◽  
Oxidation Of Hydrocarbons ◽  
Oxygen Donor ◽  
Catalyst Efficiency

The metalloporphyrin catalytic oxidation of hydrocarbons using dilute hydrogen peroxide as oxygen donor with a two-phase system in the presence of an excess of benzoic acid is studied. Porphyrins derived from meso-tetrakis(2,6-dichlorophenyl)porphyrin and bearing sulfonamide substituents at β or meso positions and halogens at β positions were used. The system allowed for very efficient catalytic epoxidations and hydroxylations of hydrocarbons. It is proved that the excess of benzoic acid is critical to the catalyst efficiency and stability. The role of the lipophilic acid in this system is discussed.

Microwave assisted synthesis of substituted metallophthalocyanines and their catalytic activity in epoxidation reaction

2005 ◽  
Vol 09 (03) ◽  
pp. 163-169 ◽  
Author(s):  
Farzad Bahadoran ◽  
Solmaz Dialameh
Keyword(s):  
Catalytic Activity ◽  
Reaction Time ◽  
Microwave Irradiation ◽  
Microwave Assisted Synthesis ◽  
Free Condition ◽  
Catalytic Activities ◽  
Microwave Assisted ◽  
Solvent Free Condition ◽  
Epoxidation Reaction ◽  
Phthalocyanine Ring

Substituted iron and cobalt phthalocyanines are easily prepared by microwave irradiation of the starting materials under solvent free condition, which reduced reaction time considerably. The synthesized metallophthalocyanines (octachloro-, tetranitro-, tetracarboxy- or polyphthalocyanine) are used as epoxidation catalysts of cyclooctene in homogeneous and heterogeneous conditions by iodosylbenzene as an oxidant. Their catalytic activities have shown that the electron withdrawing groups on the phthalocyanine ring have a very small effect on stability of the catalyst during the reactions.

scholarly journals Hydrogen Peroxide as a Green Oxidant for the Selective Catalytic Oxidation of Benzylic and Heterocyclic Alcohols in Different Media: An Overview

Chemistry ◽  
2020 ◽  
Vol 2 (1) ◽  
pp. 101-178
Author(s):  
Majid M. Heravi ◽  
Nastaran Ghalavand ◽  
Elaheh Hashemi
Keyword(s):  
Hydrogen Peroxide ◽  
Carbonyl Compounds ◽  
Aqueous Media ◽  
Environmental Concerns ◽  
Phase System ◽  
Dual Phase ◽  
Selective Catalytic Oxidation ◽  
Solvent Free Conditions ◽  
Oxidation Of Alcohols ◽  
Catalyzed Oxidation

Among a plethora of known and established oxidant in organic chemistry, hydrogen peroxide stands in a special position. It is commercially and inexpensively available, highly effective, selective, and more importantly it is compatible with current environmental concerns, dictated by principles of green chemistry. Several chemicals or their intermediates that are important in our daily life such as pharmaceuticals, flavors, fragrances, etc. are products of oxidation of alcohols. In this review, we introduce hydrogen peroxide as an effective, selective, green and privileged oxidant for the catalyzed oxidation of primary and secondary benzylic and heterocyclic alcohols to corresponding carbonyl compounds in different media such as aqueous media, under solvent-free conditions, various organic solvent, and dual-phase system.

Sign in / Sign up

Export Citation Format

Share Document