نتایج جستجو برای: bronsted

تعداد نتایج: 136  

Journal: :Indian journal of science and technology 2023

Objective: The coordination and electrochemistry-related effects uses of piperidine dithiocarbamate (pipdtc) piperazine (pzdtc) are the main topics this article. Method: An environment friendly electroless bath was created using a very small amount biodegradable methanesulphonic bronsted acid, Glyoxylic acid as reducing agent, Xylitol non-toxic natural polyhydroxylic complexing agent potassium ...

Journal: :iranian chemical communication 2013
sami sajjadifar hamid saeidian sayeh zare hojat veisi sobahn rezayati

in this work, the efficiency, generality and applicability of new bronsted acidic ionic liquid (bail) 1-methyl-3-(2-(sulfooxy)ethyl)-1h-imidazol-3-ium chloride {[msei]cl} as heterogeneous and green catalyst for organic transformations are studied. herein, the following one-pot multi-component reactions in the presence of [msei]cl are investigated: (i) the synthesis of quinoxaline derivatives fr...

In this work, the ionic liquid triethylamine-bonded sulfonic acid {[Et3N–SO3H]Cl}, N,N-diethyl-N-sulfoethanammonium chloride was used as a green acidic homogeneous catalyst to synthesis of 3,4-dihydropyrimidin-2(1H)-ones and 3,4-dihydropyrimidin-2(1H)-thiones as two categories of heterocycles, from aldehyde, dicarbonyl compound and urea or thiourea throughout the one-pot three components cycloc...

In this work, the efficiency, generality and applicability of new Bronsted acidic ionic liquid (BAIL) 1-methyl-3-(2-(sulfooxy)ethyl)-1H-imidazol-3-ium chloride {[Msei]Cl} as heterogeneous and green catalyst for organic transformations are studied. Herein, the following one-pot multi-component reactions in the presence of [Msei]Cl are investigated: (i) the synthesis of quinoxaline derivatives fr...

Journal: :Bioresources 2023

The depolymerization of natural biomass-based lignin is a definitive challenge, as it involves the integral breakdown complex and well-constructed structures. A sustainable method called ‘ionoSolv pretreatment’ employs ionic liquids in biomass processing. In this study, Bronsted acidic IL (BAIL); 1-methyl-3-(3-sulfopropyl)-imidazolium chloride, [C3SO3HMIM]Cl was synthesized commendably used to ...

2018
Snehali Mali Sachin Shinde Shashikant Damte Suresh Patil

Without using any toxic or hazardous reagent, ligand, acid, transition metal catalyst, additives/promoters and organic solvent, green Knoevenagel condensation and tandem Knoevenagel-Michael reactions have been successfully carried out by using chickpea leaf exudates as a naturally sourced Bronsted acid type bio-catalyst. The reaction proceeds in neat chickpea leaf exudates at room temperature i...

Journal: :Catalysts 2021

Over the past two decades, polyoxometalates (POM) have received considerable attention as solid catalysts, due to their unique physicochemical characteristics, since, first, they very strong Bronsted acidity, approaching region of a superacid, and second, are efficient oxidizers that exhibit rapid redox transformations under fairly mild conditions. Their structural mobility is also highlighted,...

Journal: :ACS Sustainable Chemistry & Engineering 2021

Branched fatty acids are of great interest in the oleochemical industry for many high-end applications due to their interesting physicochemical properties. In last decades, research has focused mainly on use ferrierite (FER) as catalyst isomerization into these branched acids. With FER, high yields can be obtained. FER is however expensive, and additives necessary obtain a selectivity toward th...

Journal: :IOP conference series 2021

Abstract Depletion of fossil fuels resources has triggered more research on finding potential alternative sources that are sustainable such as biomass waste. However, deconstruction the complex waste into desired products is too challenging and usually require a strong catalyst with great hydrolysing property. Common acids sulphuric acid, hydrochloric acid nitric were most studies for conversio...

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