scholarly journals Supported Ruthenium and Tetrapropylammonium Bromide Catalysts for Oxidative Carboxylation of 1-Decene

2020 ◽  
Vol 32 (4) ◽  
pp. 771-775
Author(s):  
Raiedhah A. Alsaiari
Keyword(s):  
Carbon Dioxide ◽  
Cyclic Carbonate ◽  
Ruthenium Catalysts ◽  
Ruthenium Catalyst ◽  
One Pot ◽  
Radical Initiator ◽  
Tetrapropylammonium Bromide ◽  
Catalytic Quantity ◽  
The One ◽  
Immobilization Method

Cyclic carbonate compounds are valuable for a range of applications and can be synthesized by a one-pot reaction involving epoxidation of olefin followed by reaction of the epoxide with CO2. This study used supported ruthenium catalysts for the epoxidation step (first step), where a combination of tetrapropylammonium bromide and zinc bromide was used for the cycloaddition of carbon dioxide. The supported ruthenium catalyst, prepared by a sol-immobilization method, allowed the effective epoxidation of 1-decene in air (using oxygen as the main oxidant) at 90 ºC in the presence of a catalytic quantity of radical initiator. This approach was applied to the one-pot multi-step oxidative carboxylation of 1-decene in the presence of 1 % Ru/support-Pr4NBr/ZnBr2 catalyst

A Metal‐Free Synthesis of N ‐Aryl Oxazolidin‐2‐Ones by the One‐Pot Reaction of Carbon Dioxide with N ‐Aryl Aziridines

2020 ◽  
Vol 362 (14) ◽  
pp. 2961-2969 ◽  
Author(s):  
Paolo Sonzini ◽  
Caterina Damiano ◽  
Daniela Intrieri ◽  
Gabriele Manca ◽  
Emma Gallo
Keyword(s):  
Carbon Dioxide ◽  
One Pot ◽  
Metal Free ◽  
The One

Synthesis of amino alcohols, cyclic urea, urethanes, and cyclic carbonates and tandem one-pot conversion of an epoxide to urethanes using a Zn–Zr bimetallic oxide catalyst

2021 ◽  
Author(s):  
Ganesh Sunil More ◽  
Rajendra Srivastava
Keyword(s):  
Oxide Catalyst ◽  
Cyclic Carbonate ◽  
Cyclic Carbonates ◽  
One Pot ◽  
Carbonate Production ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Excellent Activity ◽  
The One ◽  
Tandem Synthesis

The one-pot tandem synthesis of urethanes directly from an epoxide, with urea in solvent-free condition using Zn2ZrOx is demonstrated. The catalyst exhibits excellent activity in cyclic urea, urethane, and cyclic carbonate production in neat conditions.

Fabrication of the Functionalized Carbon Nanomaterials via Catalytic Pyrolysis of Heteroatom-Containing Compounds

2020 ◽  
Vol 998 ◽  
pp. 157-162
Author(s):  
Aleksey A. Vedyagin ◽  
Ilya V. Mishakov ◽  
Yurii I. Bauman ◽  
Roman M. Kenzhin
Keyword(s):  
Carbon Dioxide ◽  
Carbon Nanostructures ◽  
Catalytic Pyrolysis ◽  
Carbon Nanomaterials ◽  
Reactor System ◽  
Carbon Product ◽  
One Pot ◽  
Flow Through ◽  
The One ◽  
Closed Reactor

Commercial Ni-Cr and specially prepared Ni-Pd alloys were used as a catalyst’s precursor for the synthesis of the heteroatom-doped carbon nanofibers. In order to provide the intercalation of the doping heteroatom into the structure of the carbon product, the synthesis was performed in the one pot regime, when heteroatom-containing substance was subjected to decomposition simultaneously with carbon source compound. Chlorobenzene, 1-bromobutane, 1-iodobutane, and melamine were used as heteroatom-and carbon-containing sources in the experiments carried out in a closed reactor system. 1,2-dichloriethane, being a source of chlorine and carbon, was decomposed in a flow-through reactor system. Additionally, acetonitrile and carbon dioxide were admixed to 1,2-dichloriethane as nitrogen and oxygen sources. It was found that in all the cases, except for halogenated butanes, the amount of the intercalated heteroatom can reach 3-8 at.%. Both the substrate’s nature and the composition of the reaction mixture were found to affect the morphologic features of the carbon nanostructures produced.

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.

An Overview of the One-pot Synthesis of Imidazolines

2020 ◽  
Vol 24 (20) ◽  
pp. 2341-2355
Author(s):  
Thaipparambil Aneeja ◽  
Sankaran Radhika ◽  
Mohan Neetha ◽  
Gopinathan Anilkumar
Keyword(s):  
Asymmetric Catalysis ◽  
Organic Compounds ◽  
Ring Opening ◽  
Ecological Impact ◽  
Chiral Auxiliary ◽  
One Pot ◽  
One Pot Synthesis ◽  
The One ◽  
Synthetic Intermediate ◽  
Heterocyclic Moiety

One-pot syntheses are a simple, efficient and easy methodology, which are widely used for the synthesis of organic compounds. Imidazoline is a valuable heterocyclic moiety used as a synthetic intermediate, chiral auxiliary, chiral catalyst and a ligand for asymmetric catalysis. Imidazole is a fundamental unit of biomolecules that can be easily prepared from imidazolines. The one-pot method is an impressive approach to synthesize organic compounds as it minimizes the reaction time, separation procedures, and ecological impact. Many significant one-pot methods such as N-bromosuccinimide mediated reaction, ring-opening of tetrahydrofuran, triflic anhydrate mediated reaction, etc. were reported for imidazoline synthesis. This review describes an overview of the one-pot synthesis of imidazolines and covers literature up to 2020.

Synthesis and Kinetics of Highly Substituted Piperidines in the Presence of Tartaric Acid as a Catalyst

2018 ◽  
Vol 21 (4) ◽  
pp. 302-311
Author(s):  
Younes Ghalandarzehi ◽  
Mehdi Shahraki ◽  
Sayyed M. Habibi-Khorassani
Keyword(s):  
Ambient Temperature ◽  
Tartaric Acid ◽  
Aromatic Aldehydes ◽  
One Pot ◽  
Rate Determining Step ◽  
State Approximation ◽  
Solvent Free Conditions ◽  
Steady State Approximation ◽  
Absorbance Changes ◽  
The One

Aim & Scope: The synthesis of highly substituted piperidine from the one-pot reaction between aromatic aldehydes, anilines and β-ketoesters in the presence of tartaric acid as a catalyst has been investigated in both methanol and ethanol media at ambient temperature. Different conditions of temperature and solvent were employed for calculating the thermodynamic parameters and obtaining an experimental approach to the kinetics and mechanism. Experiments were carried out under different temperature and solvent conditions. Material and Methods: Products were characterized by comparison of physical data with authentic samples and spectroscopic data (IR and NMR). Rate constants are presented as an average of several kinetic runs (at least 6-10) and are reproducible within ± 3%. The overall rate of reaction is followed by monitoring the absorbance changes of the products versus time on a Varian (Model Cary Bio- 300) UV-vis spectrophotometer with a 10 mm light-path cell. Results: The best result was achieved in the presence of 0.075 g (0.1 M) of catalyst and 5 mL methanol at ambient temperature. When the reaction was carried out under solvent-free conditions, the product was obtained in a moderate yield (25%). Methanol was optimized as a desirable solvent in the synthesis of piperidine, nevertheless, ethanol in a kinetic investigation had none effect on the enhancement of the reaction rate than methanol. Based on the spectral data, the overall order of the reaction followed the second order kinetics. The results showed that the first step of the reaction mechanism is a rate determining step. Conclusion: The use of tartaric acid has many advantages such as mild reaction conditions, simple and readily available precursors and inexpensive catalyst. The proposed mechanism was confirmed by experimental results and a steady state approximation.

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