Selective oxidation of aniline into azoxybenzene catalyzed by Nb-peroxo@iron oxides at room temperature

2020 ◽  
Vol 44 (21) ◽  
pp. 8710-8717
Author(s):  
André L. D. Lima ◽  
Humberto V. Fajardo ◽  
André E. Nogueira ◽  
Márcio C. Pereira ◽  
Luiz C. A. Oliveira ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Selective Oxidation ◽  
Room Temperature ◽  
High Selectivity

Nb-peroxo@iron oxides show high selectivity and activity in aniline conversion to azoxybenzene.

Selective oxidation of crotyl alcohol by AuxPd bimetallic pseudo-single-atom catalysts

2020 ◽  
Vol 10 (22) ◽  
pp. 7706-7718
Author(s):  
Brandon A. Chivers ◽  
Robert W. J. Scott
Keyword(s):  
Gold Nanoparticle ◽  
Selective Oxidation ◽  
Room Temperature ◽  
High Selectivity ◽  
Alcohol Oxidation ◽  
Single Atom ◽  
Pd Catalysts ◽  
Crotyl Alcohol

Pseudo single-atom Pd catalysts dispersed in gold nanoparticle matrices show high selectivity and activity for room temperature crotyl alcohol oxidation.

Room temperature selective oxidation of aniline to azoxybenzene over a silver supported tungsten oxide nanostructured catalyst

2015 ◽  
Vol 17 (3) ◽  
pp. 1867-1876 ◽  
Author(s):  
Shilpi Ghosh ◽  
Shankha S. Acharyya ◽  
Takehiko Sasaki ◽  
Rajaram Bal
Keyword(s):  
Silver Nanoparticles ◽  
Tungsten Oxide ◽  
Selective Oxidation ◽  
Oxidative Coupling ◽  
Room Temperature ◽  
Heterogeneous Catalysts ◽  
Nanostructured Catalyst ◽  
Important Chemical

Heterogeneous catalysts comprising silver nanoparticles supported on nanostructured tungsten oxide were applied for room temperature oxidative coupling of aniline to azoxybenzene, an important chemical intermediate and a chemical of industrial interest.

scholarly journals Selective Synthesis of Ortho-Substituted 2-Aryl-3-phenyl-1,3-thiazolidin-4-one Sulfoxides and Sulfones by S-Oxidation with Oxone®

2017 ◽  
Vol 9 (4) ◽  
pp. 87
Author(s):  
Kevin C. Cannon ◽  
Alaa Alkurdi ◽  
Humayra Himel ◽  
Iryna Kurochka ◽  
Sabrina Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Aromatic Ring ◽  
Selective Oxidation ◽  
Room Temperature ◽  
Selective Synthesis ◽  
S Oxidation

S-oxidation of 2-aryl-3-phenyl-1,3-thiazolidin-4-ones with Oxone® was investigated. For all compounds evaluated, selective oxidation to the sulfoxide was realized using 3 equivalents of Oxone® at room temperature. Attempts to selectively prepare the sulfones of ortho-substituted 2-aryl-3-phenyl-1,3-thiazolidin-4-ones at high temperature by increasing the equivalents of Oxone® used were typically unsuccessful. These results contrast significantly with ortho-substituted 2-aryl-3-cyclohexyl-1,3-thiazolidin-4-ones evaluated previously. The extent of this selectivity was affected by the substituent and its position on the C2 aromatic ring. The ratio of the sulfoxide and sulfone products was quantified by isolating the products by liquid chromatography.Please find the scheme in PDF file.

Room temperature selective oxidation of benzyl alcohol under base-free aqueous conditions on Pt/TiO2

2017 ◽  
Vol 99 ◽  
pp. 6-9 ◽  
Author(s):  
Juanjuan Liu ◽  
Shihui Zou ◽  
Linfang Lu ◽  
Hongting Zhao ◽  
Liping Xiao ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Selective Oxidation ◽  
Room Temperature ◽  
Oxidation Of Benzyl Alcohol ◽  
Aqueous Conditions

Highly Selective Oxidation of Cinnamaldehyde to Benzaldehyde by Hydrogen Peroxide in Mild Conditions

2014 ◽  
Vol 522-524 ◽  
pp. 458-464
Author(s):  
Yuan Mei Nie ◽  
Yong Peng An ◽  
Cai Hua Peng ◽  
Xing Dong Yao
Keyword(s):  
Hydrogen Peroxide ◽  
Hydrogen Bond ◽  
Sodium Bicarbonate ◽  
Propylene Glycol ◽  
Selective Oxidation ◽  
High Selectivity ◽  
Protic Solvent ◽  
Hydrogen Bond Interaction ◽  
Mild Conditions ◽  
Effect Of Solvent

Benzaldehyde was produced from oxidation of cinnamaldehyde by hydrogen peroxide in propylene glycol in the presence of sodium bicarbonate. Protic solvent demonstrated high selectivity and the yield of benzaldehyde could reach up to 82% in propylene glycol. The effect of solvent on the selectivity was attributed to hydrogen bond interaction between the oxidation intermediate epoxide and the solvent.

scholarly journals Sandwich type polyoxometalates encapsulated into the mesoporous material: synthesis, characterization and catalytic application in the selective oxidation of sulfides

RSC Advances ◽  
2018 ◽  
Vol 8 (49) ◽  
pp. 28249-28260 ◽  
Author(s):  
Elham Naseri ◽  
Roushan Khoshnavazi
Keyword(s):  
Selective Oxidation ◽  
Mesoporous Material ◽  
Room Temperature ◽  
Material Synthesis ◽  
Catalytic Activities ◽  
Oxidation Of Sulfides ◽  
Catalytic Application ◽  
Sandwich Type ◽  
First Time ◽  
Sandwich Type Polyoxometalates

The A-type sandwich POMs of [(HOSnIVOH)3(PW9O34)2]12– (P2W18Sn3) and [(OCeIVO)3(PW9O34)2]12– (P2W18Ce3) were immobilized for the first time into the porous MIL-101 MOF. Their catalytic activities were examined in the oxidation of sulfides to sulfones at room temperature.

Remarkable promoting effects of BiOCl on the room-temperature selective oxidation of benzyl alcohol over supported Pt catalysts

2018 ◽  
Vol 42 (11) ◽  
pp. 8979-8984 ◽  
Author(s):  
Juanjuan Liu ◽  
Feng Han ◽  
Lingze Chen ◽  
Linfang Lu ◽  
Shihui Zou ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Selective Oxidation ◽  
Room Temperature ◽  
Catalytic Performance ◽  
Pt Catalysts ◽  
Oxidation Of Benzyl Alcohol ◽  
Supported Pt Catalysts

BiOCl, in addition to traditional Bi metal, could remarkably promote the catalytic performance of Pt/MOx in the selective oxidation of benzyl alcohol.

Highly Selective Oxidation Monosaccharides to Sugar Acids at Room Temperature over Palladium Supported on Surface Functionalized Carbon Nanotubes

2021 ◽  
Author(s):  
Zengyong Li ◽  
Di Li ◽  
Wu Lan ◽  
Xuehui Li ◽  
Xiaofang Wan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Selective Oxidation ◽  
Room Temperature ◽  
Efficient Catalyst ◽  
Functionalized Carbon Nanotubes

Selective oxidation of monosaccharides into sugar acids is an important reaction for the production of biomass-based chemicals, but the design of efficient catalyst remains a big challenge. Herein, we report...

Aluminium influence on iron oxides: XVIII. The effect of Al substitution and crystal size on magnetic hyperfine fields of natural goethites

Clay Minerals ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 455-464 ◽  
Author(s):  
J. Friedl ◽  
U. Schwertmann
Keyword(s):  
Iron Oxides ◽  
Room Temperature ◽  
Crystal Size ◽  
Tropical Soil ◽  
Iron Ores ◽  
Hyperfine Fields ◽  
Al Substitution ◽  
Subtropical Soils ◽  
Crystallization Conditions ◽  
The Mean

AbstractTwo sets of natural Al-substituted goethites from contrasting surface environments (24 tropical and subtropical soils vs. ten lake iron ores from Finland) were characterized by Mössbauer spectra obtained at room temperature and 4.2 K. A negative correlation between Bhf and Al substitution (R2 = 0.751) was found by combining the data of all the samples, which was slightly improved (R2 = 0.779) by taking the mean coherence length perpendicular to 111 (MCL111) into account. The effect of Al on lowering Bhf was, however, stronger for the tropical soil goethites than for those of the lake ores. This is parallelled by a corresponding difference in the unit-cell decrease per unit Al substitution. These differences are believed to result from the crystallization conditions in the two different environments.

scholarly journals Efficient synthesis of pyrazolopyridines containing a chromane backbone through domino reaction

2019 ◽  
Vol 15 ◽  
pp. 874-880
Author(s):  
Razieh Navari ◽  
Saeed Balalaie ◽  
Saber Mehrparvar ◽  
Fatemeh Darvish ◽  
Frank Rominger ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Selectivity ◽  
Domino Reaction ◽  
Primary Amines ◽  
Efficient Synthesis ◽  
Atom Economy ◽  
Reaction Conditions ◽  
Efficient Approach ◽  
Three Component Reaction ◽  
High Yields

An efficient approach for the synthesis of pyrazolopyridines containing the aminochromane motif through a base-catalyzed cyclization reaction is reported. The synthesis was carried out through a three-component reaction of (arylhydrazono)methyl-4H-chromen-4-one, malononitrile, primary amines in the presence of Et3N at room temperature. However, carrying out the reaction under the same conditions without base led to a fused chromanyl-cyanopyridine. High selectivity, high atom economy, and good to high yields in addition to mild reaction conditions are the advantages of this approach.

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