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.

Recent advance in ester synthesis by Multi Component Reactions (MCRs): A Review

2021 ◽  
Vol 25 ◽  
Author(s):  
Dhaval B. Patel ◽  
Jagruti A. Parmar ◽  
Siddharth S. Patel ◽  
Unnati J. Naik ◽  
Hitesh D. Patel
Keyword(s):  
Multicomponent Reactions ◽  
Medicinal Chemistry ◽  
Reaction Times ◽  
Synthetic Methods ◽  
Ester Synthesis ◽  
One Pot ◽  
Wide Range ◽  
Recent Developments ◽  
Ester Linkage ◽  
The One

: The synthesis of ester containing heterocyclic compounds via multicomponent reaction is one of the most preferable process in the synthetic organic chemistry and medicinal chemistry. Compounds containing ester linkage have a wide range of biological application in the pharmaceutical field. Therefore, many method have been developed for the synthesis of these type of derivatives. However, some of them are carried out in the presence of toxic solvents and catalysts, with lower yields, longer reaction times, low selectivities and by-products. Thus, the development of new synthetic methods for the ester synthesis is required in the medicinal chemistry. As we know, multicomponent reactions (MCRs) are a powerful tool towards the one-pot ester synthesis, so in this article we have reviewed the recent developments in ester synthesis. This work covers selected explanation of methods via multicomponent reactions to explore the methodological development in ester synthesis.

scholarly journals One-Pot Ionic Liquid-Mediated Bioprocess for Pretreatment and Enzymatic Hydrolysis of Rice Straw with Ionic Liquid-Tolerance Bacterial Cellulase

2022 ◽  
Vol 9 (1) ◽  
pp. 17
Author(s):  
Malinee Sriariyanun ◽  
Nichaphat Kitiborwornkul ◽  
Prapakorn Tantayotai ◽  
Kittipong Rattanaporn ◽  
Pau-Loke Show
Keyword(s):  
Ionic Liquid ◽  
Saline Soil ◽  
Enzymatic Saccharification ◽  
Value Added ◽  
Specific Enzyme ◽  
One Pot ◽  
The One ◽  
Hydrolysis Of ◽  
Bacterial Cellulase ◽  
Value Added Products

Ionic liquid (IL) pretreatment of lignocellulose is an efficient method for the enhancement of enzymatic saccharification. However, the remaining residues of ILs deactivate cellulase, therefore making intensive biomass washing after pretreatment necessary. This study aimed to develop the one-pot process combining IL pretreatment and enzymatic saccharification by using low-toxic choline acetate ([Ch][OAc]) and IL-tolerant bacterial cellulases. Crude cellulases produced from saline soil inhabited Bacillus sp. CBD2 and Brevibacillus sp. CBD3 were tested under the influence of 0.5–2.0 M [Ch][OAc], which showed that their activities retained at more than 95%. However, [Ch][OAc] had toxicity to CBD2 and CBD3 cultures, in which only 32.85% and 12.88% were alive at 0.5 M [Ch][OAc]. Based on the specific enzyme activities, the sugar amounts produced from one-pot processes using 1 mg of CBD2 and CBD3 were higher than that of Celluclast 1.5 L by 2.0 and 4.5 times, respectively, suggesting their potential for further application in the biorefining process of value-added products.

Sulfated Tin Oxide: A Convenient Heterogeneous Catalyst for the Synthesis of 4-Arylmethylidene-3-substituted-isoxazol-5(4H)-ones

2021 ◽  
Vol 18 ◽  
Author(s):  
Nitishkumar S. Kaminwar ◽  
Sunil U. Tekale ◽  
Srinivas L. Nakkalwar ◽  
Rajendra P. Pawar
Keyword(s):  
Heterogeneous Catalyst ◽  
Tin Oxide ◽  
Heterocyclic Compounds ◽  
Biological Activities ◽  
Hydroxylamine Hydrochloride ◽  
One Pot ◽  
Easy Method ◽  
Three Component Reaction ◽  
Wide Range ◽  
The One

: Synthesis of isoxazole structural heterocyclic compounds is important due to their wide range of biological activities. In the present article, we report a convenient and easy method for the synthesis of 4-arylmethylidene-3-substituted-isoxazol-5(4H)-ones by the one-pot three-component reaction of aldehydes, β-keto ester, and hydroxylamine hydrochloride cat-alyzed by sulfated tin oxide as a heterogeneous catalyst.

scholarly journals A novel three-component reaction between isocyanides, alcohols or thiols and elemental sulfur: a mild, catalyst-free approach towards O-thiocarbamates and dithiocarbamates

2019 ◽  
Vol 15 ◽  
pp. 1523-1533 ◽  
Author(s):  
András György Németh ◽  
György Miklós Keserű ◽  
Péter Ábrányi-Balogh
Keyword(s):  
Elemental Sulfur ◽  
Building Blocks ◽  
Reaction Conditions ◽  
One Pot ◽  
Catalyst Free ◽  
Synthetic Procedure ◽  
Three Component Reaction ◽  
Wide Range ◽  
Organic Chemist ◽  
The One

A new multicomponent reaction has been developed between isocyanides, sulfur and alcohols or thiols under mild reaction conditions to afford O-thiocarbamates and dithiocarbamates in moderate to good yields. The one-pot reaction cascade involves the formation of an isothiocyanate intermediate, thus a catalyst-free synthesis of isothiocyanates, as valuable building blocks from isocyanides and sulfur is proposed, as well. The synthetic procedure suits the demand of a modern organic chemist, as it tolerates a wide range of functional groups, it is atom economic and easily scalable.

Molybdenum-Mediated One-Pot Synthesis of Pyrazoles from Isoxazoles

Synthesis ◽  
2019 ◽  
Vol 51 (20) ◽  
pp. 3796-3804 ◽  
Author(s):  
Marine Rey ◽  
Stéphane Beaumont
Keyword(s):  
Bond Cleavage ◽  
Direct Synthesis ◽  
Molybdenum Complex ◽  
One Pot ◽  
One Pot Synthesis ◽  
Wide Range ◽  
Hydrolysis Of ◽  
Substituted Pyrazoles

A one-pot approach for the direct synthesis of substituted pyrazoles from isoxazoles is reported. The process involves isoxazole N–O bond cleavage mediated by a molybdenum complex, in situ hydrolysis of the resulting β-amino enone to the corresponding 1,3-diketone, followed by pyrazole formation in the presence of hydrazine or substituted hydrazine. Good to excellent yields and regioselectivities are obtained with nonsymmetric isoxazoles. By using readily available starting materials, a wide range of substituted pyrazoles may be synthesized by this method.

Quantum Dot Solar Cells Based on CdSe-Assembled Titania Semiconductors

2008 ◽  
Vol 1102 ◽  
Author(s):  
Chien-Tsung Wang ◽  
Chung-Hsiao Yeh
Keyword(s):  
Particle Size ◽  
Solar Cells ◽  
Energy Gap ◽  
Blue Shift ◽  
Cdse Nanocrystals ◽  
Cdse Qds ◽  
One Pot ◽  
Optical Absorbance ◽  
Quantum Size ◽  
The One

AbstractIn the study, semiconductor quantum dots (QDs) of CdSe nanocrystals have been demonstrated effective as the light energy harvesting assemblies in solar cells. Colloidal CdSe QDs were synthesized by the one-pot approach and linked through a surface modifier onto titania (TiO2) nanoparticles. The TiO2-CdSe composite, while employed as the photoanode in a photoelectrochemical apparatus, exhibited a higher photon-to-electron conversion efficiency (3-fold) than the TiO2 alone, and also a higher stability for photocurrent generation, according to photocurrent transient responses. The optical absorbance and photoluminescence of the CdSe colloid showed a blue shift in the absorption edge with decreasing the particle size (band energy gap shifts from 2.0 to 2.19 eV), suggesting a quantum size effect. The CdSe particle size was determined up to 5 nm by a transmission electron microscopy. A scheme describing the charge carrier rectification for the coupled semiconductor system is proposed.

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

Dry ice-mediated rational synthesis of edge-carboxylated crumpled graphene nanosheets for selective and prompt hydrolysis of cellulose and eucalyptus lignocellulose under ambient reaction conditions

2020 ◽  
Vol 22 (16) ◽  
pp. 5437-5446 ◽  
Author(s):  
Hassan Idris Abdu ◽  
Kamel Eid ◽  
Aboubakr M. Abdullah ◽  
Mostafa H. Sliem ◽  
Ahmed Elzatahry ◽  
...  
Keyword(s):  
Graphene Nanosheets ◽  
Ambient Conditions ◽  
Selective Hydrolysis ◽  
Reaction Conditions ◽  
One Pot ◽  
Dry Ice ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of ◽  
Crumpled Graphene

Edge-carboxylated graphene (ECG) crumpled nanosheets with tuneable COOH content were synthesized by a facile one pot approach for selective hydrolysis of cellulose to glucose and eucalyptus to xylose and glucose under ambient conditions.

Hydrolysis of cellulose with one-pot synthesized sulfonated carbonaceous solid acid

2018 ◽  
Vol 169 ◽  
pp. 244-247 ◽  
Author(s):  
Feng Shen ◽  
Tianmeng Guo ◽  
Chenxi Bai ◽  
Mo Qiu ◽  
Xinhua Qi
Keyword(s):  
Solid Acid ◽  
One Pot ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

scholarly journals 1-(4-Nitrophenyl)-1H-1,2,3-Triazole-4-carbaldehyde: Scalable Synthesis and Its Use in the Preparation of 1-Alkyl-4-Formyl-1,2,3-triazoles

Organics ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 404-414
Author(s):  
Tomas Opsomer ◽  
Kaat Valkeneers ◽  
Ana Ratković ◽  
Wim Dehaen
Keyword(s):  
One Pot ◽  
Complete Hydrolysis ◽  
One Step ◽  
Synthetic Intermediates ◽  
Cornforth Rearrangement ◽  
Scalable Synthesis ◽  
The One ◽  
Novel Applications ◽  
Hydrolysis Of

1,2,3-Triazole-4-carbaldehydes are useful synthetic intermediates which may play an important role in the discovery of novel applications of the 1,2,3-triazole moiety. In this work, a one-step multigram scale synthesis of 4-formyl-1-(4-nitrophenyl)-1H-1,2,3-triazole (FNPT) as a preferred reagent for the synthesis of 1-alkyl-4-formyltriazoles is described, making use of the commercially available 3-dimethylaminoacrolein and 4-nitrophenyl azide. Next, the earlier reported reaction of FNPT with alkylamines is further explored, and for hexylamine, the one-pot sequential cycloaddition and Cornforth rearrangement is demonstrated. In addition, a useful protocol for the in situ diazotization of 4-nitroaniline is provided. This facilitated the complete hydrolysis of rearranged 4-iminomethyl-1,2,3-triazoles and allowed for the recycling of 4-nitrophenyl azide.

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