ChemInform Abstract: A Reusable Catalytic System for Sulfide Oxidation and Epoxidation of Allylic Alcohols in Water Catalyzed by Poly(dimethyl diallyl) Ammonium/Polyoxometalate.

ChemInform ◽  
2016 ◽  
Vol 47 (26) ◽  
Author(s):  
Wei Zhao ◽  
Chunxia Yang ◽  
Zhiguo Cheng ◽  
Zhenghui Zhang
Keyword(s):  
Catalytic System ◽  
Sulfide Oxidation ◽  
Allylic Alcohols

A reusable catalytic system for sulfide oxidation and epoxidation of allylic alcohols in water catalyzed by poly(dimethyl diallyl) ammonium/polyoxometalate

2016 ◽  
Vol 18 (4) ◽  
pp. 995-998 ◽  
Author(s):  
Wei Zhao ◽  
Chunxia Yang ◽  
Zhiguo Cheng ◽  
Zhenghui Zhang
Keyword(s):  
Catalytic System ◽  
Sulfide Oxidation ◽  
Allylic Alcohols ◽  
Effective Catalyst ◽  
Mild Conditions ◽  
Oxidation Of Sulfides

An effective catalyst based on a polyoxometalate and a polymer has been developed for the oxidation of sulfides and allylic alcohols under mild conditions in water.

Practical allylation with unactivated allylic alcohols under mild conditions

2021 ◽  
Author(s):  
Shuangshuang Li ◽  
Ju Qiu ◽  
Bowen Li ◽  
Zuolian Sun ◽  
Peizhong Xie ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Catalytic System ◽  
Allylic Alcohols ◽  
Mild Conditions ◽  
Accelerate Proton

A practical palladium/calcium catalytic system was developed for dehydrative allylation concerning unactivated allylic alcohols. EtOH solvent with H2O additive was identified as powerful media to accelerate proton transfer. That catalytic...

Bimetallic titanium complex catalyzed enantioselective oxidation of thioethers using aqueous H2O2 as a terminal oxidant

RSC Advances ◽  
2015 ◽  
Vol 5 (59) ◽  
pp. 47732-47739 ◽  
Author(s):  
Prasanta Kumar Bera ◽  
Naveen Gupta ◽  
Sayed H. R. Abdi ◽  
Noor-ul H. Khan ◽  
Rukhsana I. Kureshy ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic System ◽  
Sulfide Oxidation ◽  
Environmentally Benign ◽  
Aqueous Hydrogen Peroxide ◽  
Titanium Complex ◽  
Enantioselective Oxidation ◽  
Highly Efficient

This study represents a highly efficient sulfide oxidation catalytic system using a non-toxic Ti-catalyst and environmentally benign aqueous hydrogen peroxide.

Supported task-specific ionic liquid catalyst for highly efficient and recyclable aerobic oxidation of benzyl alcohols

2011 ◽  
Vol 89 (1) ◽  
pp. 68-71 ◽  
Author(s):  
Lin Liu ◽  
Juanjuan Ma ◽  
Zhen Sun ◽  
Jianping Zhang ◽  
Jingjing Huang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Catalytic System ◽  
Aerobic Oxidation ◽  
Copper Salt ◽  
High Conversion ◽  
Allylic Alcohols ◽  
Benzyl Alcohols ◽  
Highly Efficient ◽  
Silica Supports ◽  
Task Specific Ionic Liquid

A novel catalytic system was prepared by impregnating ionic liquid immobilized 2,2,6,6-tetramethylpiperidyl-1-oxyl (TEMPO) and copper salt onto various silica supports. This catalytic system was capable of rapidly converting different benzylic and allylic alcohols into the corresponding aldehydes under O2 atmosphere with high conversion. Recycling results showed that the catalyst could be easily recovered and reused.

TiIV Exchanged K10-Montmorillonite: Characterisation and Catalytic Properties in Liquid-Phase Sulfide Oxidation

2008 ◽  
Vol 2008 (10) ◽  
pp. 604-608
Author(s):  
I. Khedher ◽  
A. Ghorbel ◽  
J.M. Fraile ◽  
J.A. Mayoral
Keyword(s):  
Catalytic System ◽  
Sulfide Oxidation ◽  
Nitrogen Adsorption ◽  
High Dispersion ◽  
X Ray Diffraction ◽  
Asymmetric Oxidation ◽  
Methyl Phenyl Sulfide ◽  
Chiral Modifier ◽  
Catalytic Sites ◽  
Visible Reflectance

Titanium-containing K10 has been synthesised and characterised by X-ray diffraction, UV-visible reflectance, solid state NMR spectroscopy, N2 nitrogen adsorption at 77K and chemical analysis. Two different titanium species have identified with a high dispersion in K10. The first is in an isolated penta- and hexa-coordinated state and the second is in the form of polymerised hexacoordinated species, which contains Ti-O-Ti bonds. These titanium species were found to be the catalytic sites that readily interact with oxidant to offer an active and selective catalytic system for the oxidation of sulfides. This catalytic system was studied in the asymmetric oxidation of methyl phenyl sulfide, using different types of chiral modifier, and gives excellent conversion and sulfoxide selectivity, together with a significant enantioselectivity in the range of 16–18% ee with (R)-binol.

scholarly journals Palladium-catalyzed selective activation of allyl alcohols as allyl cations, allyl anions, and zwitterionic trimethylenemethanes

2008 ◽  
Vol 80 (5) ◽  
pp. 979-991 ◽  
Author(s):  
Yoshinao Tamaru ◽  
Masanari Kimura
Keyword(s):  
Catalytic System ◽  
Allylic Alcohols ◽  
Selective Activation ◽  
Active Methylene Compounds ◽  
Palladium Catalyzed ◽  
Synthetic Equivalent ◽  
Vinyl Epoxide ◽  
Allyl Alcohols ◽  
Allyl Anions ◽  
Active Methylene

Pd-Et3B catalytic system promotes the generation of allyl cations, allyl anions, and zwitterionic trimethylenemethane species from the corresponding allylic alcohols. Allyl cations react with a wide variety of nucleophiles, e.g., amines, active methylene compounds, 1,3,5-trihydroxybenzene, indoles, aldehydes (at the α-position). The reaction is extended to dehydrative Grob fragmentation of 1,3-diols. Allyl anions react with aldimines to give homoallyl amines. Zwitterionic trimethylenemethane, generated from 2-methylene-1,3-propanediol, reacts with aldehydes and aldimines to provide 3-methylenecyclopentanols and 3-methylenepyrrolidines, respectively. Vinyl epoxide can be utilized as a synthetic equivalent of 3-butenyl 2-anion-1-cation.

Oppenauer-type oxidation of secondary alcohols catalyzed by homogeneous water-soluble complexes

2005 ◽  
Vol 83 (6-7) ◽  
pp. 702-710 ◽  
Author(s):  
Abdelaziz Nait Ajjou ◽  
Jean-Louis Pinet
Keyword(s):  
Dicarboxylic Acid ◽  
Selective Oxidation ◽  
Catalytic System ◽  
Sodium Carbonate ◽  
Water Soluble ◽  
Allylic Alcohols ◽  
Secondary Alcohols ◽  
Dipotassium Salt ◽  
Oppenauer Oxidation ◽  
Water Catalysis

The catalytic system composed of [Ir(COD)Cl]2, 2,2′-biquinoline-4,4′-dicarboxylic acid dipotassium salt (BQC), and sodium carbonate is highly efficient for the selective oxidation of benzylic, 1-heteroaromatic, aliphatic, and allylic secondary alcohols using catalyst:substrate ratios ranging from 0.4% to 2.5%. Sterically hindered allylic alcohols undergo selectively good conversions to the corresponding enones, while unhindered ones are completely isomerized to saturated ketones. Mercury tests indicate that the catalytic process is likely homogeneous. The mechanism proposed for this Oppenauer-type oxidation including the isomerization process is based on iridium-alkoxide species.Key words: Oppenauer oxidation, water, catalysis, isomerization, secondary alcohols.

Rhodium(III)-catalyzed C-H alkylation of heterocycles with allylic alcohols in water: A reusable catalytic system for the synthesis of β-aryl ketones

Tetrahedron ◽  
2018 ◽  
Vol 74 (51) ◽  
pp. 7364-7371 ◽  
Author(s):  
Xiang Li ◽  
Feng Zhang ◽  
Dan Wu ◽  
Yirui Liu ◽  
Gan Xu ◽  
...  
Keyword(s):  
Catalytic System ◽  
Allylic Alcohols ◽  
Aryl Ketones

Direct use of allylic alcohols and allylic amines in palladium-catalyzed allylic amination

2017 ◽  
Vol 53 (37) ◽  
pp. 5151-5154 ◽  
Author(s):  
Jiangyan Jing ◽  
Xiaohong Huo ◽  
Jiefeng Shen ◽  
Jingke Fu ◽  
Qinghua Meng ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Functional Groups ◽  
Catalytic System ◽  
Allylic Alcohols ◽  
Allylic Amines ◽  
Allylic Amination ◽  
Reaction Conditions ◽  
Wide Range ◽  
Palladium Catalyzed ◽  
Direct Use

Allylic alcohols and allylic amines were directly utilized in a Pd-catalyzed hydrogen-bond-activated allylic amination under mild reaction conditions in the absence of any additives. The catalytic system is compatible with a variety of functional groups and can be used to prepare a wide range of linear allylic amines in good to excellent yields.

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