scholarly journals Direct conversion of C6 sugars to methyl glycerate and glycolate in methanol

RSC Advances ◽  
2018 ◽  
Vol 8 (53) ◽  
pp. 30163-30170 ◽  
Author(s):  
Lei Feng ◽  
Gang Li ◽  
Yueer Yan ◽  
Wenrong Hou ◽  
Yahong Zhang ◽  
...  
Keyword(s):  
Maximum Yield ◽  
Direct Conversion ◽  
One Pot ◽  
The One ◽  
Methyl Glycolate ◽  
Reaction Routes

Methyl glycerate (MGLY) and methyl glycolate (MG) are directly produced in maximum yield by the one-pot conversion of hexose, and the formation of MGLY and MG experience different reaction routes.

Direct Conversion of Carboxylic Acids to Various Nitrogen-Containing Compounds in the One-Pot Exploiting Curtius Rearrangement

2019 ◽  
Vol 84 (17) ◽  
pp. 11323-11334 ◽  
Author(s):  
Arun Kumar ◽  
Naveen Kumar ◽  
Ritika Sharma ◽  
Gaurav Bhargava ◽  
Dinesh Mahajan
Keyword(s):  
Carboxylic Acids ◽  
Direct Conversion ◽  
One Pot ◽  
Curtius Rearrangement ◽  
The One ◽  
Nitrogen Containing Compounds

scholarly journals One-Pot Synthesis of Lactose Derivatives from Whey Permeate

Foods ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 784 ◽  
Author(s):  
Maryam Enteshari ◽  
Sergio I. Martínez-Monteagudo
Keyword(s):  
Organic Acids ◽  
Maximum Yield ◽  
Continuous Stirred Tank Reactor ◽  
One Pot ◽  
Whey Permeate ◽  
One Pot Synthesis ◽  
Maximum Conversion ◽  
Acid Whey ◽  
Continuous Stirred Tank ◽  
The One

The simultaneous production of lactulose (LAU), lactobionic acid (LBA), and organic acids from sweet and acid whey permeate (SWP and AWP) via catalytic synthesis (5% Ru/C) was studied in a continuous stirred-tank reactor. At selected conditions (60 °C, 60 bar, and 600 rpm), a maximum conversion of lactose (37 and 34%) was obtained after 90 min for SWP and AWP, respectively. The highest yield calculated with respect to the initial concentration of lactose for LAU was 22.98 ± 0.81 and 15.29 ± 0.81% after only 30 min for SWP, and AWP, respectively. For LBA, a maximum yield was found in SWP (5.23%) after 210 min, while about 2.2% was found in AWP. Six major organic acids (gluconic, pyruvic, lactic, formic, acetic, and citric acid) were quantified during the one-pot synthesis of lactose.

Direct conversion of cellulose into isosorbide over Ni doped NbOPO4 catalysts in water

2020 ◽  
Vol 44 (25) ◽  
pp. 10292-10299
Author(s):  
Minyao He ◽  
Jiaxing Guo ◽  
Xincheng Wang ◽  
Yongji Song ◽  
ShanShan Liu ◽  
...  
Keyword(s):  
Direct Conversion ◽  
One Pot ◽  
The One ◽  
Aqueous Conditions

Ni doped NbOPO4 catalysts were used efficiently for the one-pot conversion of cellulose to isosorbide under aqueous conditions.

1-Ethyl-3-Methylimidazolium Cyanoborohydride Catalyzed Solvent Free Microwave Assisted One Pot Multicomponent Synthesis of Tetrahydroben-zo[b]Pyran Derivatives

2021 ◽  
Vol 18 ◽  
Author(s):  
Rajesh K. Manjul ◽  
Vilas B. Gade ◽  
Dhananjay N. Gaikwad ◽  
Dayanand M. Suryavanshi ◽  
Anjali S. Rajbhoj ◽  
...  
Keyword(s):  
Maximum Yield ◽  
Aromatic Aldehydes ◽  
Structural Features ◽  
Solvent Free ◽  
Multicomponent Synthesis ◽  
One Pot ◽  
Solvent Free Condition ◽  
Green Approach ◽  
13C Nuclear Magnetic Resonance ◽  
The One

: We present a facile and environmentally benign protocol for the synthesis of tetrahydrobenzo[b]pyran derivatives via multi-component condensation of dimedon, malononitrile and different aromatic aldehydes in presence of 1-ethyl-3-methylimidazolium cyanoborohydride ([EMIm][BH3CN]) as catalyst under microwave irradiation. The one-pot synthesis, facile solvent-free condition and good isolated yield illustrate the utility of this green approach. The structural features are de-rived using analytical tools including Fourier Transform Infrared Spectroscopy (FT‐IR) and 1H and 13C Nuclear Magnetic Resonance (NMR) Spectroscopy. Electronic synthesis of tetrahydrobenzo[b]pyran derivatives by using catalytic action of 1-ethyl-3-methylimidazolium cyanoborohydride has been used to obtain maximum yield.

scholarly journals One-pot synthesis of isosorbide from cellulose or lignocellulosic biomass: a challenge?

2020 ◽  
Vol 16 ◽  
pp. 1713-1721
Author(s):  
Isaline Bonnin ◽  
Raphaël Mereau ◽  
Thierry Tassaing ◽  
Karine De Oliveira Vigier
Keyword(s):  
Particle Size ◽  
Lignocellulosic Biomass ◽  
Direct Conversion ◽  
Hydrogenation Catalyst ◽  
One Pot ◽  
Wide Range ◽  
Hydrolysis Of Cellulose ◽  
The One ◽  
Hydrolysis Of ◽  
Intense Research

The catalytic conversion of (ligno)cellulose is currently subject of intense research. Isosorbide is one of the interesting products that can be produced from (ligno)cellulose as it can be used for the synthesis of a wide range of pharmaceuticals, chemicals, and polymers. Isosorbide is obtained after the hydrolysis of cellulose to glucose, followed by the hydrogenation of glucose to sorbitol that is then dehydrated to isosorbide. The one-pot process requires an acid and a hydrogenation catalyst. Several parameters are of importance during the direct conversion of (ligno)cellulose such as the acidity, the crystallinity and the particle size of cellulose as well as the nature of the feedstocks. This review highlights all these parameters and all the strategies employed to produce isosorbide from (ligno)cellulose in a one-pot process.

Screening of catalysts and reaction conditions for the direct conversion of corncob xylan to xylitol

2017 ◽  
Vol 6 (3) ◽  
Author(s):  
Lucília S. Ribeiro ◽  
José J.M. Órfão ◽  
Manuel F.R. Pereira
Keyword(s):  
Direct Conversion ◽  
Supported Metal Catalysts ◽  
Reaction Conditions ◽  
One Pot ◽  
Metal Loading ◽  
Catalytic Support ◽  
Metal Metal ◽  
Repeated Use ◽  
Loading Amount ◽  
The One

AbstractDifferent supported metal catalysts were tested for the one-pot transformation of corncob xylan to xylitol. The influence of several factors, such as catalytic support, nature of metal, metal loading, amount of catalyst, hydrogen pressure and reaction temperature, was investigated. The results revealed that xylan can be converted into xylitol with a yield close to 80% after 2 h of reaction using Ru supported on carbon nanotubes (CNT, 0.4 wt% metal loading) with excellent stability after repeated use, at a temperature of 170°C and an H

Comparative study of different catalysts for the direct conversion of cellulose to sorbitol

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Lucília S. Ribeiro ◽  
José J.M. Órfão ◽  
Manuel Fernando R. Pereira
Keyword(s):  
Direct Conversion ◽  
Single Step ◽  
Raw Material ◽  
Added Value ◽  
Supported Metal Catalysts ◽  
One Pot ◽  
Hydrolytic Hydrogenation ◽  
Renewable Raw Material ◽  
Pre Treatment ◽  
The One

AbstractThe catalytic conversion of lignocellulosic biomass to obtain high added value compounds and fuels is a rapidly developing field. Given the abundance of this renewable raw material and its reduced impact on the food chain, it is an attractive source for obtaining chemicals or fuels in the context of a sustainable economy. In this work, bi-functional catalysts were developed that were capable of performing in a single step the hydrolysis and hydrogenation of cellulose to produce compounds that may be used in the production of fine chemicals or easily converted into fuels (e.g., sorbitol). Different activated carbon (AC) supported metal catalysts were examined for the one-pot hydrolytic hydrogenation of cellulose. Among the prepared catalysts, 0.4% Ru/AC was shown to be the most active and selective for the conversion of cellulose into sorbitol. When microcrystalline cellulose was used, a conversion of 32% was reached after 5 h of reaction, with a selectivity to sorbitol of 30%. Moreover, ball-milled cellulose allowed attaining conversions over 50%, with selectivities to sorbitol of 45%. The results obtained showed that Ru/AC is effective for the hydrolytic hydrogenation of cellulose to sugar alcohols and that the conversion can be greatly improved by using the substrate after pre-treatment by ball-milling.

scholarly journals Efficient One-pot Synthesis of 4 Hydroxy-2H Chromene by heterogeneously catalyzed ZnO NP and mesoporous aluminosilicate catalysts in solvent free condition.

2021 ◽  
Author(s):  
Birendra Nath Mahato ◽  
Krithiga T. ◽  
G. Yogalakshmi ◽  
Aravind Kumar
Keyword(s):  
Anticancer Agents ◽  
Maximum Yield ◽  
Biologically Active ◽  
One Pot ◽  
Chemical Route ◽  
Solvent Free Condition ◽  
Wet Chemical ◽  
Wet Chemical Route ◽  
Mesoporous Zno ◽  
The One

4Hydroxy-2H Chromenes are fused benzopyran rings, an important class of biologically active compounds, widely used as antibacterial, antiviral, antitumor, and anticancer agents. In this present paper, we report the 4 Hydroxy-2H Chromenes synthesis by using two catalysts namely, (i) ZnO nanoparticles and (ii) mesoporous ZnO/AlSBA-15 (7) catalysts. The ZnO NP catalyst was prepared by using leaf extract while ZnO/AlSBA-15(7) catalysts were prepared by the wet chemical route. All catalysts were characterized by XRD, SEM, EDS, FTIR, and N2 sorption techniques. The catalytic activity of the synthesized catalyst was evaluated in the one-pot reaction using aromatic aldehyde and Coumarin, and found to be maximum yield of 81% at temperature 80°C, a catalyst dose of 10 mmol %, in time limit of 4h.

A Series of Metal-Organic Frameworks for Selective CO2 Capture and Catalytic Oxidative Carboxylation of Olefins

2018 ◽  
Author(s):  
Huong T. D. Nguyen ◽  
Y B. N. Tran ◽  
Hung N. Nguyen ◽  
Tranh C. Nguyen ◽  
Felipe Gándara ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Adsorption ◽  
New Materials ◽  
One Pot ◽  
Acid Gas ◽  
Naphthalene Diimide ◽  
Styrene Carbonate ◽  
Metal Organic ◽  
Adsorption Of Co ◽  
The One

<p>Three novel lanthanide metal˗organic frameworks (Ln-MOFs), namely MOF-590, -591, and -592 were constructed from a naphthalene diimide tetracarboxylic acid. Gas adsorption measurements of MOF-591 and -592 revealed good adsorption of CO<sub>2</sub> (low pressure, at room temperature) and moderate CO<sub>2</sub> selectivity over N<sub>2</sub> and CH<sub>4</sub>. Accordingly, breakthrough measurements were performed on a representative MOF-592, in which the separation of CO<sub>2</sub> from binary mixture containing N<sub>2</sub> and CO<sub>2</sub> was demonstrated without any loss in performance over three consecutive cycles. Moreover, MOF-590, MOF-591, and MOF-592 exhibited catalytic activity in the one-pot synthesis of styrene carbonate from styrene and CO<sub>2</sub> under mild conditions (1 atm CO<sub>2</sub>, 80 °C, and solvent-free). Among the new materials, MOF-590 revealed a remarkable efficiency with exceptional conversion (96%), selectivity (95%), and yield (91%). </p><br>

A Study on the Rearrangement of Dialkyl 1-Aryl-1-hydroxymethylphosphonates to Benzyl Phosphates

2020 ◽  
Vol 24 (4) ◽  
pp. 465-471 ◽  
Author(s):  
Zita Rádai ◽  
Réka Szabó ◽  
Áron Szigetvári ◽  
Nóra Zsuzsa Kiss ◽  
Zoltán Mucsi ◽  
...  
Keyword(s):  
Quantum Chemical ◽  
Room Temperature ◽  
Phase Transfer ◽  
One Pot ◽  
Substrate Dependence ◽  
Triethylbenzylammonium Chloride ◽  
One Step ◽  
The Pudovik Reaction ◽  
The One ◽  
Solid Liquid

The phospha-Brook rearrangement of dialkyl 1-aryl-1-hydroxymethylphosphonates (HPs) to the corresponding benzyl phosphates (BPs) has been elaborated under solid-liquid phase transfer catalytic conditions. The best procedure involved the use of triethylbenzylammonium chloride as the catalyst and Cs2CO3 as the base in acetonitrile as the solvent at room temperature. The substrate dependence of the rearrangement has been studied, and the mechanism of the transformation under discussion was explored by quantum chemical calculations. The key intermediate is an oxaphosphirane. The one-pot version starting with the Pudovik reaction has also been developed. The conditions of this tandem transformation were the same, as those for the one-step HP→BP conversion.

Sign in / Sign up

Export Citation Format

Share Document