Metal-Free Chemoselective Oxidation of Sulfides to Sulfoxides by Hydrogen Peroxide Catalyzed by in situ Generated Dodecyl Hydrogen Sulfate in the Absence of Organic Co-Solvents.

ChemInform ◽  
2006 ◽  
Vol 37 (27) ◽  
Author(s):  
H. Firouzabadi ◽  
N. Iranpoor ◽  
A. A. Jafari ◽  
E. Riazymontazer
Keyword(s):  
Hydrogen Peroxide ◽  
Hydrogen Sulfate ◽  
Metal Free ◽  
Oxidation Of Sulfides

In situ construction of phenanthroline-based cationic radical porous hybrid polymers for metal-free heterogeneous catalysis

2021 ◽  
Vol 9 (12) ◽  
pp. 7556-7565
Author(s):  
Guojian Chen ◽  
Yadong Zhang ◽  
Ke Liu ◽  
Xiaoqing Liu ◽  
Lei Wu ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Heterogeneous Catalysts ◽  
Hybrid Polymers ◽  
Metal Free ◽  
Oxidation Of Sulfides

Constructing phenanthroline-based cationic radical porous hybrid polymers as versatile metal-free heterogeneous catalysts for both oxidation of sulfides and CO2 conversion.

Pyrenediones as versatile photocatalysts for oxygenation reactions with in situ generation of hydrogen peroxide under visible light

2020 ◽  
Vol 22 (1) ◽  
pp. 22-27 ◽  
Author(s):  
Yuannian Zhang ◽  
Xin Yang ◽  
Haidi Tang ◽  
Dong Liang ◽  
Jie Wu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Oxidation Of Sulfides ◽  
In Situ Generation

Pyrenediones (PYDs) are efficient photocatalysts for three oxygenation reactions: epoxidation of electron deficient olefins, oxidative hydroxylation of organoborons and oxidation of sulfides via in situ generation of H2O2 from O2 under visible light irradiation.

Metal-free carbon nitride photocatalysis with in situ hydrogen peroxide generation for the degradation of aromatic compounds

2019 ◽  
Vol 252 ◽  
pp. 128-137 ◽  
Author(s):  
André Torres-Pinto ◽  
Maria J. Sampaio ◽  
Cláudia G. Silva ◽  
Joaquim L. Faria ◽  
Adrián M.T. Silva
Keyword(s):  
Hydrogen Peroxide ◽  
Aromatic Compounds ◽  
Carbon Nitride ◽  
Free Carbon ◽  
Metal Free ◽  
Hydrogen Peroxide Generation

scholarly journals Continuous Bioinspired Oxidation of Sulfides

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2711
Author(s):  
Francesca Mangiavacchi ◽  
Letizia Crociani ◽  
Luca Sancineto ◽  
Francesca Marini ◽  
Claudio Santi
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Selective Oxidation ◽  
Flow Conditions ◽  
Oxidation Of Sulfides ◽  
Vinyl Sulfides ◽  
Scale Preparation ◽  
Dialkyl Sulfides

A simple, efficient, and selective oxidation under flow conditions of sulfides into their corresponding sulfoxides and sulfones is reported herein, using as a catalyst perselenic acid generated in situ by the oxidation of selenium (IV) oxide in a diluted aqueous solution of hydrogen peroxide as the final oxidant. The scope of the proposed methodology was investigated using aryl alkyl sulfides, aryl vinyl sulfides, and dialkyl sulfides as substrates, evidencing, in general, a good applicability. The scaled-up synthesis of (methylsulfonyl)benzene was also demonstrated, leading to its gram-scale preparation.

Metal-free chemoselective oxidation of sulfides by in situ generated Koser’s reagent in aqueous media

2014 ◽  
Vol 55 (10) ◽  
pp. 1818-1821 ◽  
Author(s):  
Bing Yu ◽  
Chun-Xiang Guo ◽  
Chun-Lai Zhong ◽  
Zhen-Feng Diao ◽  
Liang-Nian He
Keyword(s):  
Aqueous Media ◽  
Metal Free ◽  
Oxidation Of Sulfides ◽  
Koser's Reagent

scholarly journals Partial oxidation of alkanes by dioxiranes formed in situ at low temperature

2017 ◽  
Vol 376 (2110) ◽  
pp. 20170055
Author(s):  
Sara Yacob ◽  
Michael J. Caulfield ◽  
Timothy A. Barckholtz
Keyword(s):  
Hydrogen Peroxide ◽  
Partial Oxidation ◽  
Low Temperatures ◽  
Alkane Oxidation ◽  
Reactive Intermediate ◽  
Isotopic Labelling ◽  
Metal Free ◽  
Electrophilic Character ◽  
Preferential Incorporation

Partial oxidation catalysts capable of efficiently operating at low temperatures may limit the over-oxidation of alkane substrates and thereby improve selectivity. This work focuses on examining alkane oxidation using completely metal-free organocatalysts, dioxiranes. The dioxiranes employed here are synthesized by oxidation of a ketone using a terminal oxidant, such as hydrogen peroxide. Our work generates the dioxirane in situ , so that the process can be catalytic with respect to the ketone. To date, we have demonstrated selective partial oxidation of adamantane using ketone catalysts resulting in yields upwards of 60% towards 1-adamantanol with greater than 99% selectivity. Furthermore, we have demonstrated that changing the electrophilic character of the ketone R groups to contain more electron-donating ligands facilitates the dioxirane ring formation and improves overall oxidation yields. Isotopic labelling studies using H 2 18 O 2 show the preferential incorporation of an 18 O label into the parent ketone, providing evidence for a dioxirane intermediate formed in situ . The isotopic labelling studies, along with solvent effect studies, suggest the formation of peracetic acid as a reactive intermediate. This article is part of a discussion meeting issue ‘Providing sustainable catalytic solutions for a rapidly changing world’.

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