A mild and chemoselective CALB biocatalysed synthesis of sulfoxides exploiting the dual role of AcOEt as solvent and reagent

2021 ◽  
Vol 19 (1) ◽  
pp. 156-161
Author(s):  
Silvia Anselmi ◽  
Siyu Liu ◽  
Seong-Heun Kim ◽  
Sarah M. Barry ◽  
Thomas S. Moody ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Dual Role ◽  
Mild Conditions ◽  
Urea Hydrogen Peroxide ◽  
Role Of Solvent

Sulfoxides have been synthesised from various sulfide substrates under mild conditions exploiting CALB biocatalyst in the presence of urea hydrogen peroxide and AcOEt which acts with the dual role of solvent and reagent.

Dual role of hydrogen peroxide on the oxidase-like activity of nanoceria and its application for colorimetric hydrogen peroxide and glucose sensing

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 59939-59945 ◽  
Author(s):  
Ruochen Guo ◽  
Yanru Wang ◽  
Shaoxuan Yu ◽  
Wenxin Zhu ◽  
Fangqing Zheng ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Cerium Oxide ◽  
Glucose Sensing ◽  
Dual Role ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Chromogenic Substrate

Nanoceria (cerium oxide nanoparticles) exhibits excellent catalytic activity towards chromogenic substrate 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2), which has been reported.

The dual role of hydrogen peroxide in fuel cells

2015 ◽  
Vol 60 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Liang An ◽  
Tianshou Zhao ◽  
Xiaohui Yan ◽  
Xuelong Zhou ◽  
Peng Tan
Keyword(s):  
Hydrogen Peroxide ◽  
Fuel Cells ◽  
Dual Role

scholarly journals Electrochemical synthesis and amidation of benzoin: benzamides from benzaldehydes

2019 ◽  
Vol 91 (10) ◽  
pp. 1709-1715 ◽  
Author(s):  
Daniele Rocco ◽  
Isabella Chiarotto ◽  
Leonardo Mattiello ◽  
Fabiana Pandolfi ◽  
Daniela Zane ◽  
...  
Keyword(s):  
Room Temperature ◽  
Electrochemical Reaction ◽  
Supporting Electrolyte ◽  
Electrolysis Cell ◽  
Electrolyte System ◽  
Mild Conditions ◽  
Liquid Salt ◽  
Benzoin Condensation ◽  
Role Of Solvent

Abstract The benzoin condensation starting from benzaldehyde and the subsequent benzoin amidation to benzamide can be efficiently carried out under very mild conditions in an electrolysis cell. Among the advantages of using electrochemistry to generate our active reagents, the use of the easily dosed and non pollutant electron, instead of stoichiometric amounts of redox reagents or bases, usually renders the electrochemical methodology “greener” than classical organic reactions. Benzoin is obtained in good yield (85 %) carrying out the reaction in the room temperature ionic liquid BMIm-BF4. In this electrochemical reaction this liquid salt assumes the double role of solvent-supporting electrolyte system and precatalyst, yielding the corresponding N-heterocyclic carbene. The subsequent benzoin amidation is carried out by electrochemically generated superoxide anion, in the presence of an aliphatic primary or secondary amine. In this case the system superoxide/molecular oxygen acts as base and oxidant, yielding very good yields of benzamides (up to 89 %).

scholarly journals Efficient preparation of carbamates by Rh-catalysed oxidative carbonylation: unveiling the role of the oxidant

2017 ◽  
Vol 53 (2) ◽  
pp. 404-407 ◽  
Author(s):  
Amaia Iturmendi ◽  
Manuel Iglesias ◽  
Julen Munárriz ◽  
Victor Polo ◽  
Jesús J. Pérez-Torrente ◽  
...  
Keyword(s):  
Dual Role ◽  
Oxidative Carbonylation ◽  
Mild Conditions ◽  
Three Component Reaction

A Rh(i)-catalysed three-component reaction allows access to carbamates from amines or imines under mild conditions in the presence of Oxone, which plays a dual role as a base and an oxidant.

Dual Role of Hydrogen Peroxide As an Oxidant in Pneumococcal Pneumonia

2020 ◽  
Author(s):  
Mobarak Abu Mraheil ◽  
Haroldo A. Toque ◽  
Luigi La Pietra ◽  
Juerg Hamacher ◽  
Tenzing Phanthok ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Pneumococcal Pneumonia ◽  
Dual Role

scholarly journals Water-Mediated Ceric Ammonium Nitrate Catalyzed C-C/C-N Bond Formation: Convenient Access to Polyfunctionalized Pyrazoles via Multicomponent Reaction

2019 ◽  
Vol 31 (5) ◽  
pp. 1189-1194 ◽  
Author(s):  
Vikas D. Kadu ◽  
Mahesh G. Hublikar ◽  
Dattatraya G. Raut ◽  
Raghunath B. Bhosale
Keyword(s):  
Polyethylene Glycol ◽  
Ammonium Nitrate ◽  
Aqueous Medium ◽  
Multicomponent Reaction ◽  
Bond Formation ◽  
Dual Role ◽  
Ceric Ammonium Nitrate ◽  
Role Of Solvent ◽  
Convenient Access

An efficient multicomponent approach has been developed in the environmentally green aqueous medium for synthesis of substituted polyfunctionalized pyrazoles. The simple and readily available aldehydes, malononitrile and phenylhydrazines substrates afforded polysubstituted imidazoles (15 examples) up to 96 % yield. The polyethylene glycol is playing the dual role of solvent and promoter with water in this reaction catalyzed by ceric ammonium nitrate.

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