Studies on transition-metal nitrido and oxo complexes. Part 20. Oxoruthenates and oxo-osmates in oxidation catalysis; cis-[Os(OH)2O4]2- as a catalytic oxidant for primary amines and for alcohols

2001 ◽  
Vol 79 (5-6) ◽  
pp. 598-606 ◽  
Author(s):  
William P Griffith ◽  
Maria Suriaatmaja
Keyword(s):  
Raman Spectroscopy ◽  
Transition Metal ◽  
Carboxylic Acids ◽  
Oxidative Dehydrogenation ◽  
Alcohol Oxidation ◽  
Oxidation Catalysis ◽  
Primary Amines ◽  
Secondary Alcohols ◽  
Primary Alcohols ◽  
Aromatic And Aliphatic Amines

cis-[Os(OH)2O4]2– with [Fe(CN)6]3– and other co-oxidants has been studied as a catalytic reagent for the oxidative dehydrogenation of primary aromatic and aliphatic amines to nitriles, the oxidation of primary alcohols to carboxylic acids and of secondary alcohols to ketones. Electronic and Raman spectroscopy have been used to elucidate the nature of the oxoruthenates and oxo-osmates present in a number of reported organic oxidations catalyzed by ruthenium and osmium species.Key words: oxidation catalysis, ruthenium, osmium, amine dehydrogenation, alcohol oxidation.

Direct Oxidation of Primary Alcohols to Carboxylic Acids

Synthesis ◽  
2020 ◽  
Author(s):  
Travis J. Williams ◽  
Valeriy Cherepakhin
Keyword(s):  
Carboxylic Acids ◽  
Direct Synthesis ◽  
Primary Alcohol ◽  
Alcohol Oxidation ◽  
Atom Economy ◽  
Primary Alcohols ◽  
Direct Oxidation ◽  
Metal Compounds ◽  
New Methods ◽  
Active Research

AbstractOxidation of primary alcohols to carboxylic acids is a fundamental transformation in organic chemistry, yet despite its simplicity, extensive use, and relationship to pH, it remains a subject of active research for synthetic organic chemists. Since 2013, a great number of new methods have emerged that utilize transition-metal compounds as catalysts for acceptorless dehydrogenation of alcohols to carboxylates. The interest in this reaction is explained by its atom economy, which is in accord with the principles of sustainability and green chemistry. Therefore, the methods for the direct synthesis of carboxylic acids from alcohols is ripe for a modern survey, which we provide in this review.1 Introduction2 Thermodynamics of Primary Alcohol Oxidation3 Oxometalate Oxidation4 Transfer Dehydrogenation5 Acceptorless Dehydrogenation6 Electrochemical Methods7 Outlook

Transition-metal-free aerobic oxidation of primary alcohols to carboxylic acids

2013 ◽  
Vol 37 (6) ◽  
pp. 1700 ◽  
Author(s):  
Jing Wang ◽  
Chao Liu ◽  
Jiwen Yuan ◽  
Aiwen Lei
Keyword(s):  
Transition Metal ◽  
Carboxylic Acids ◽  
Aerobic Oxidation ◽  
Primary Alcohols ◽  
Metal Free

Prediction of the Absolute Configurations of the Enantiomers of Racemic Primary and Secondary Alcohols and Primary Amines by Kinetic Resolution with (2R,3R)-2,3-Diacetoxysuccinic Anhydride

1979 ◽  
Vol 32 (12) ◽  
pp. 2625 ◽  
Author(s):  
KH Bell
Keyword(s):  
Free Energy ◽  
Prediction Model ◽  
Kinetic Resolution ◽  
Primary Amines ◽  
Secondary Alcohols ◽  
Primary Alcohols ◽  
The Absolute ◽  
Conformational Free Energy

The absolute configurations of the enantiomers of a variety of racemic secondary and primary alcohols and racemic primary amines have been correctly predicted from the results of kinetic resolution with (2R,3R)-2,3-diacetoxysuccinic anhydride. In the prediction model (1), allocation of relative sizes to the groups attached to the chiral centre was based on conformational free energy differences.

ChemInform Abstract: Transition-Metal-Free Aerobic Oxidation of Primary Alcohols to Carboxylic Acids.

ChemInform ◽  
2013 ◽  
Vol 44 (45) ◽  
pp. no-no
Author(s):  
Jing Wang ◽  
Chao Liu ◽  
Jiwen Yuan ◽  
Aiwen Lei
Keyword(s):  
Transition Metal ◽  
Carboxylic Acids ◽  
Aerobic Oxidation ◽  
Primary Alcohols ◽  
Metal Free

Hydrogen-Borrowing Amination of Secondary Alcohols Promoted by a (Cyclopentadienone)iron Complex

Synthesis ◽  
2019 ◽  
Vol 51 (18) ◽  
pp. 3545-3555 ◽  
Author(s):  
Xishan Bai ◽  
Francesco Aiolfi ◽  
Mattia Cettolin ◽  
Umberto Piarulli ◽  
Alberto Dal Corso ◽  
...  
Keyword(s):  
Active Catalyst ◽  
Secondary Alcohol ◽  
Iron Complex ◽  
Aliphatic Amines ◽  
Primary Amines ◽  
Secondary Alcohols ◽  
Alcohol Group ◽  
Co Catalysts ◽  
Highly Active ◽  
Aromatic And Aliphatic Amines

Thanks to a highly active catalyst, the scope of the (cyclopentadienone)iron complex-promoted ‘hydrogen-borrowing’ (HB) amination has been expanded to secondary alcohols, which had previously been reported to react only in the presence of large amounts of co-catalysts. A range of cyclic and acyclic secondary alcohols were reacted with aromatic and aliphatic amines giving fair to excellent yields of the substitution products. The catalyst was also able to promote the cyclization of diols bearing a secondary alcohol group with primary amines to generate saturated N-heterocycles.

scholarly journals Barium Titanium Oxynitride from Ammonia-Free Nitridation of Reduced BaTiO3

Inorganics ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 62
Author(s):  
Hua Guo ◽  
Aleksander Jaworski ◽  
Zheng Chen ◽  
Can Lu ◽  
Adam Slabon ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Nmr Spectroscopy ◽  
Transition Metal ◽  
Signal Intensity ◽  
Diffuse Reflectance ◽  
Conduction Band Edge ◽  
Vacancy Ordering ◽  
Vis Spectroscopy ◽  
O Vacancy ◽  
Barium Titanium

We investigated the nitridation of reduced BaTiO3, BaTiO2.60H0.08, corresponding to an oxyhydride with a large concentration of O defects (>10%). The material is readily nitrided under flowing N2 gas at temperatures between 400 and 450 °C to yield oxynitrides BaTiO2.6Nx (x = 0.2−0.22) with a slightly tetragonally distorted perovskite structure, a ≈ 4.01 and c ≈ 4.02 Å, and Ti partially remaining in the oxidation state III. The tetragonal structure was confirmed from Raman spectroscopy. 14N MAS NMR spectroscopy shows a single resonance at 270 ppm, which is typical for perovskite transition metal oxynitrides. However, largely different signal intensity for materials with very similar N content suggests N/O/vacancy ordering when prolonging nitridation times to hours. Diffuse reflectance UV-VIS spectroscopy shows a reduction of the intrinsic band gap to 2.4–2.45 eV compared to BaTiO3 (~3.2 eV). Mott-Schottky measurements confirm n-type conductivity and reveal a slight negative shift of the conduction band edge from –0.59 V (BaTiO3) to ~–0.65 eV.

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