Preparation of Sustainable Polar Aprotic Solvents from Biomass: One-Pot Two-Step Catalytic Reaction of Cellulose with N,N-Dimethylurea over Ru/C

2021 ◽  
Author(s):  
Tayyebeh B. Champ ◽  
Shuo Liu ◽  
Benjamin L. Wegenhart ◽  
Tony Zhang ◽  
Mahdi M. Abu-Omar
Keyword(s):  
Catalytic Reaction ◽  
Aprotic Solvents ◽  
One Pot

One-pot synthesis of polysiloxanes using catalytic reaction of dihydroorganosilanes with DMF: A new approach to functional polysiloxanes

2020 ◽  
Vol 928 ◽  
pp. 121550
Author(s):  
Makoto Minato ◽  
Hiroshi Watanabe ◽  
Takahiro Shimizu ◽  
Takito Shibuya ◽  
Riko Yamamoto ◽  
...  
Keyword(s):  
Catalytic Reaction ◽  
One Pot ◽  
New Approach ◽  
One Pot Synthesis

A comparative study of metal-catalyzed three-component synthesis of α-aminophosphonates

2021 ◽  
pp. 221-234
Author(s):  
Marwa M. Abdeen ◽  
Mohamed A. Hamed ◽  
Abdel Aleem Hassan Abdel Aleem ◽  
Ibrahim F. Nassar ◽  
Ibrahim E.T. El-Sayed
Keyword(s):  
Carbonyl Compounds ◽  
Room Temperature ◽  
Lithium Perchlorate ◽  
Aprotic Solvents ◽  
Electronic Factor ◽  
One Pot ◽  
Catalyst Type ◽  
Metal Catalyzed ◽  
The One ◽  
Metal Triflates

Different metal catalysts have been tested for the one-pot transformation of carbonyl compounds, amines and phosphites to α-aminophosphonates. The influence of catalyst type, amount, solvent and the substrate electronic factor have been investigated. The results revealed that the carbonyl compounds could be smoothly converted into α-aminophosphonates at room temperature in good to excellent yields, with or without solvent in a reasonable reaction time. These results suggested that among others, lithium perchlorate and metal triflates were proven to be effective catalysts in 10 moles % catalysts. Polar aprotic solvents proved to be the best for the synthesis of α-aminophosphonates. The synthesized compounds' structure characterizations were elucidated by different spectroscopic tools and showed results consistent with the expected structures.

ZnS nanoparticles as an efficient recyclable heterogeneous catalyst for one-pot synthesis of 4-substituted-1,5-benzodiazepines

2015 ◽  
Vol 39 (2) ◽  
pp. 1228-1236 ◽  
Author(s):  
Hossein Naeimi ◽  
Hossein Foroughi
Keyword(s):  
Heterogeneous Catalyst ◽  
Catalytic Reaction ◽  
Zns Nanoparticles ◽  
One Pot ◽  
One Pot Synthesis ◽  
Benzodiazepine Derivatives ◽  
Novel Method ◽  
Recyclable Heterogeneous Catalyst

An efficient and novel method was developed for the synthesis of 4-substituted-1,5-benzodiazepine derivatives via a one-pot three-component catalytic reaction.

scholarly journals Facile isomerization of silyl enol ethers catalyzed by triflic imide and its application to one-pot isomerization–(2 + 2) cycloaddition

2012 ◽  
Vol 8 ◽  
pp. 658-661 ◽  
Author(s):  
Kazato Inanaga ◽  
Yu Ogawa ◽  
Yuuki Nagamoto ◽  
Akihiro Daigaku ◽  
Hidetoshi Tokuyama ◽  
...  
Keyword(s):  
Catalytic Reaction ◽  
Reaction Sequence ◽  
One Pot ◽  
Enol Ethers ◽  
Silyl Enol Ethers

A triflic imide (Tf2NH) catalyzed isomerization of kinetically favourable silyl enol ethers into thermodynamically stable ones was developed. We also demonstrated a one-pot catalytic reaction consisting of (2 + 2) cycloaddition and isomerization. In the reaction sequence, Tf2NH catalyzes both of the reactions.

One pot synthesis of phenanthridines using a palladium-catalyzed cyclization of aromatic ketoximes with aryl iodides via Beckmann rearrangement

RSC Advances ◽  
2016 ◽  
Vol 6 (51) ◽  
pp. 45036-45040 ◽  
Author(s):  
Gajula Raju ◽  
Vijayacharan Guguloth ◽  
Battu Satyanarayana
Keyword(s):  
Catalytic Reaction ◽  
Catalytic Amount ◽  
Beckmann Rearrangement ◽  
One Pot ◽  
Excellent Yield ◽  
One Pot Synthesis ◽  
Aryl Iodides ◽  
Palladium Catalyzed

The catalytic reaction of ketoximes with aryl iodides via a Beckmann rearrangement in the presence of a catalytic amount of Pd(OAc)2, Ag2O and ZnBr2 gave substituted phenanthridines in good to excellent yield.

3-Halopropenyl esters as precursors of a new class of oxygen-substituted allylic organometallic compounds: Applications in organic synthesis

2004 ◽  
Vol 76 (3) ◽  
pp. 657-669 ◽  
Author(s):  
Marco Lombardo ◽  
Sebastiano Licciulli ◽  
C. Trombini
Keyword(s):  
Organic Synthesis ◽  
Carbonyl Compound ◽  
Carbonyl Compounds ◽  
Organometallic Compounds ◽  
Aprotic Solvents ◽  
One Pot ◽  
New Class ◽  
Combined Use ◽  
Salen Ligand ◽  
Acyl Halides

3-halopropenyl esters, readily prepared by the addition of acyl halides to acrolein, react with zinc, indium, and chromium(II), thus opening a route to a new class of oxygen-substituted allylic organometallic compounds. Indium and zinc reagents smoothly add to carbonyl compounds, affording alk-1-en-3,4-diol derivatives in a variety of synthetic procedures which include typical Grignard stepwise conditions as well as Barbier one-pot protocols. Using zinc and indium in water or aprotic solvents, simple diastereoselectivity was found to depend on the nature of the carbonyl compound; conjugated aldehydes favor formation of syn-adducts while unconjugated aldehydes favor anti-adducts. Moving to chromium, a reversal of regioselectivity was observed in favor of (Z)-4-hydroxy-enolacetates, flexible protected forms of homoaldols. Chromium complexes are generated in a catalytic cycle based on the combined use of the redox Mn(0)/Cr(III) couple and of TMSCl. When the Cr-catalyzed reaction is carried out in the presence of Jacobsen's Salen ligand, the regiochemical outcome of the reaction is again reversed, and syn-alk-1-en-3,4-diols are formed in high ee's.

One-pot reduction of olefin and ketone moieties by a copper–phosphine catalyst enabled by polar aprotic solvents

2013 ◽  
Vol 3 (5) ◽  
pp. 1240 ◽  
Author(s):  
Christopher R. Waidmann ◽  
L. A. “Pete” Silks ◽  
Ruilian Wu ◽  
John C. Gordon
Keyword(s):  
Aprotic Solvents ◽  
One Pot

scholarly journals A Multi-Catalytic Sensing for Hydrogen Peroxide, Glucose, and Organophosphorus Pesticides Based on Carbon Dots

2021 ◽  
Vol 9 ◽  
Author(s):  
Ping Li ◽  
Xiang-Ying Sun ◽  
Jiang-Shan Shen
Keyword(s):  
Catalytic Reaction ◽  
Carbon Dots ◽  
Limit Of Detection ◽  
Organophosphorus Pesticides ◽  
Choline Oxidase ◽  
Hydrothermal Route ◽  
One Pot ◽  
Catalytic Systems ◽  
Sensing System ◽  
Fruit Samples

In this work, a facile one-pot hydrothermal route was employed to synthesize a series of fluorescent carbon dots (CDs) by using 20 natural amino acids, respectively, as the starting materials. It was found that the CDs synthesized using phenylalanine could possess the intrinsic peroxidase-like activity that could effectively catalyze a traditional peroxidase substrate like 3, 3’, 5, 5’- tetramethylbenzidine (TMB) in the presence of H2O2 to produce a blue solution; thereby, a catalytic sensing system for H2O2 has been developed. On the basis of this catalytic reaction, together with the fact that glucose oxidase (GOx) can catalyze the hydrolysis of glucose to generate H2O2, a sensitive catalytic sensing system for glucose could be further established. Furthermore, based on this catalytic reaction, taken together with the two enzymatic catalytic systems of acetylcholinesterase (AChE) and choline oxidase (CHO), a highly sensitive multi-catalytic sensing system could be successfully developed for organophosphorus (OPs) pesticides such as dimethoate, DDVP, and parathion-methyl. Limit of detections (LODs) of H2O2 and glucose were estimated to be 6.5 and 0.84 μM, respectively. The limit of detection of the sub-nM level could be obtained for tested dimethoate, DDVP, and parathion-methyl OPs pesticides. The established sensing systems can exhibit good practical application performance in serum and several fruit samples.

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