Direct oxidative amidation of aromatic aldehydes using aqueous hydrogen peroxide in continuous flow microreactor systems

2012 ◽  
Vol 14 (5) ◽  
pp. 1471 ◽  
Author(s):  
Xiaoying Liu ◽  
Klavs F. Jensen
Keyword(s):  
Hydrogen Peroxide ◽  
Continuous Flow ◽  
Aromatic Aldehydes ◽  
Aqueous Hydrogen Peroxide ◽  
Flow Microreactor ◽  
Oxidative Amidation

Metal-free oxidative amidation of aldehydes with aminopyridines employing aqueous hydrogen peroxide

2016 ◽  
Vol 14 (35) ◽  
pp. 8228-8231 ◽  
Author(s):  
E. Sankari Devi ◽  
Anitha Alanthadka ◽  
A. Tamilselvi ◽  
Subbiah Nagarajan ◽  
Vellaisamy Sridharan ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Free ◽  
Oxidative Amidation

An elegant metal free method for the amidation of aldehydes with aminopyridines for the synthesis of N-(pyridinyl)benzamide was accomplished using simple aqueous H2O2 as the oxidant.

ChemInform Abstract: Metal-Free Oxidative Amidation of Aldehydes with Aminopyridines Employing Aqueous Hydrogen Peroxide.

ChemInform ◽  
2016 ◽  
Vol 47 (52) ◽  
Author(s):  
E. Sankari Devi ◽  
Anitha Alanthadka ◽  
A. Tamilselvi ◽  
Subbiah Nagarajan ◽  
Vellaisamy Sridharan ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Free ◽  
Oxidative Amidation

scholarly journals Metal-Organic Frameworks in Oxidation Catalysis with Hydrogen Peroxide

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 283
Author(s):  
Oxana Kholdeeva ◽  
Nataliya Maksimchuk
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Selective Oxidation ◽  
Metal Organic Frameworks ◽  
Short Review ◽  
Catalytic Performance ◽  
Oxidation Catalysis ◽  
Catalyst Stability ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Organic

In recent years, metal–organic frameworks (MOFs) have received increasing attention as selective oxidation catalysts and supports for their construction. In this short review paper, we survey recent findings concerning use of MOFs in heterogeneous liquid-phase selective oxidation catalysis with the green oxidant–aqueous hydrogen peroxide. MOFs having outstanding thermal and chemical stability, such as Cr(III)-based MIL-101, Ti(IV)-based MIL-125, Zr(IV)-based UiO-66(67), Zn(II)-based ZIF-8, and some others, will be in the main focus of this work. The effects of the metal nature and MOF structure on catalytic activity and oxidation selectivity are analyzed and the mechanisms of hydrogen peroxide activation are discussed. In some cases, we also make an attempt to analyze relationships between liquid-phase adsorption properties of MOFs and peculiarities of their catalytic performance. Attempts of using MOFs as supports for construction of single-site catalysts through their modification with heterometals will be also addressed in relation to the use of such catalysts for activation of H2O2. Special attention is given to the critical issues of catalyst stability and reusability. The scope and limitations of MOF catalysts in H2O2-based selective oxidation are discussed.

A review of lignin hydrogen peroxide oxidation chemistry with emphasis on aromatic aldehydes and acids

Holzforschung ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ajinkya More ◽  
Thomas Elder ◽  
Zhihua Jiang
Keyword(s):  
Hydrogen Peroxide ◽  
Oxidative Degradation ◽  
Reaction Medium ◽  
Dicarboxylic Acids ◽  
Aromatic Aldehydes ◽  
Product Distribution ◽  
Reaction Conditions ◽  
Alkaline Conditions ◽  
The Stability ◽  
Oxidation Chemistry

Abstract This review discusses the main factors that govern the oxidation processes of lignins into aromatic aldehydes and acids using hydrogen peroxide. Aromatic aldehydes and acids are produced in the oxidative degradation of lignin whereas mono and dicarboxylic acids are the main products. The stability of hydrogen peroxide under the reaction conditions is an important factor that needs to be addressed for selectively improving the yield of aromatic aldehydes. Hydrogen peroxide in the presence of heavy metal ions readily decomposes, leading to minor degradation of lignin. This degradation results in quinones which are highly reactive towards peroxide. Under these reaction conditions, the pH of the reaction medium defines the reaction mechanism and the product distribution. Under acidic conditions, hydrogen peroxide reacts electrophilically with electron rich aromatic and olefinic structures at comparatively higher temperatures. In contrast, under alkaline conditions it reacts nucleophilically with electron deficient carbonyl and conjugated carbonyl structures in lignin. The reaction pattern in the oxidation of lignin usually involves cleavage of the aromatic ring, the aliphatic side chain or other linkages which will be discussed in this review.

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