ChemInform Abstract: Cu(II)-Catalyzed Esterification Reaction via Aerobic Oxidative Cleavage of C(CO)-C(Alkyl) Bonds.

ChemInform ◽  
2016 ◽  
Vol 47 (23) ◽  
Author(s):  
Ran Ma ◽  
Liang-Nian He ◽  
An-Hua Liu ◽  
Qing-Wen Song
Keyword(s):  
Oxidative Cleavage ◽  
Esterification Reaction

Hydroxyl Radical-Mediated Oxidative Cleavage of C=C Band and Further Esterification Reaction by Heterogeneous Semiconductor Photocatalysis

2021 ◽  
Author(s):  
Hui Wang ◽  
Rui Jia ◽  
Mei Hong ◽  
Hongyan Miao ◽  
Bang-qing Ni ◽  
...  
Keyword(s):  
Hydroxyl Radical ◽  
Carbonyl Compounds ◽  
Carbon Nitride ◽  
Oxidative Cleavage ◽  
Esterification Reaction ◽  
Semiconductor Photocatalysis

A hydroxyl radical-mediated aerobic cleavage of alkenes and further sequence esterification reaction for the preparation of carbonyl compounds has been developed by using tubular carbon nitride (TCN) as a general...

ChemInform Abstract: PIFA-Mediated Esterification Reaction of Alkynes with Alcohols via Oxidative Cleavage of Carbon Triple Bonds.

ChemInform ◽  
2014 ◽  
Vol 45 (36) ◽  
pp. no-no
Author(s):  
Qing Jiang ◽  
An Zhao ◽  
Bin Xu ◽  
Jing Jia ◽  
Xin Liu ◽  
...  
Keyword(s):  
Oxidative Cleavage ◽  
Esterification Reaction ◽  
Triple Bonds

Cu(ii)-catalyzed esterification reaction via aerobic oxidative cleavage of C(CO)–C(alkyl) bonds

2016 ◽  
Vol 52 (10) ◽  
pp. 2145-2148 ◽  
Author(s):  
Ran Ma ◽  
Liang-Nian He ◽  
An-Hua Liu ◽  
Qing-Wen Song
Keyword(s):  
Nucleophilic Addition ◽  
Bond Cleavage ◽  
Oxidative Cleavage ◽  
Esterification Reaction ◽  
Oxidative Esterification

Cu(ii)-catalyzed aerobic oxidative esterification of simple ketones is realized through α-oxygenation/esterification/nucleophilic addition/C–C bond cleavage with the release of CO2.

PIFA-Mediated Esterification Reaction of Alkynes with Alcohols via Oxidative Cleavage of Carbon Triple Bonds

2014 ◽  
Vol 79 (6) ◽  
pp. 2709-2715 ◽  
Author(s):  
Qing Jiang ◽  
An Zhao ◽  
Bin Xu ◽  
Jing Jia ◽  
Xin Liu ◽  
...  
Keyword(s):  
Oxidative Cleavage ◽  
Esterification Reaction ◽  
Triple Bonds

PEMBUATAN SURFAKTAN DARI ASAM OLEAT

2019 ◽  
Vol 1 (3) ◽  
pp. 68
Author(s):  
Puguh Setyopratomo ◽  
Edy Purwanto ◽  
H. Yefrico ◽  
H. Yefrico
Keyword(s):  
Oleic Acid ◽  
Optimum Condition ◽  
Reaction Temperature ◽  
Catalyst Concentration ◽  
Acid Number ◽  
Esterification Reaction ◽  
Number Density ◽  
Sample Analysis ◽  
Reaction Conversion ◽  
Glycerol Mono

The synthesis of glycerol mono oleic from oleic acid and glycerol is classified as an esterification reaction. This research is aimed to study the influent of reaction temperature and catalyst concentration on reaction conversion. During the experiment the temperature of reaction mixture was varied as 110 oC, 130 oC, and 150 oC, while the catalyst concentration of 1%, 3 %, and 5% was used. The batch experiment was conducted in a glass reactor equipped with termometer, agitator, and reflux condensor. The oleic acid – glycerol mol ratio of 1 : 2 was used as a mixture feed. To maintain the reaction temperature at certain level, the oil bath was used. After the temperature of reaction mixture was reached the expected value, then H2SO4 catalyst was added to the reactor.  To measure the extent of the reaction, every 30 minutes the sample was drawn out from the reactor vessel. The sample analysis include acid number, density, and viscosity measurement. From this research the optimum condition which is the temperature of reaction of 150 oC and 1% catalyst concentration was obtained. At this optimum condition the convertion reach 86% and the analysis of other physical properties of the product show the acid number of 24.12, the density of 0.922 g/cc, and the viscosity of 118.4 cp.

Engine Performance with Diesel-Biodiesel Blends Fuel and Emission Characteristics

2020 ◽  
Vol 38 (5A) ◽  
pp. 779-788
Author(s):  
Marwa N. Kareem ◽  
Adel M. Salih
Keyword(s):  
Sulfur Content ◽  
Diesel Fuel ◽  
Engine Performance ◽  
Esterification Reaction ◽  
Biodiesel Fuel ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Biodiesel Blends ◽  
Fuel Blends ◽  
Hc Emissions

In this study, the sunflowers oil was utilized as for producing biodiesel via a chemical operation, which is called trans-esterification reaction. Iraqi diesel fuel suffers from high sulfur content, which makes it one of the worst fuels in the world. This study is an attempt to improve the fuel specifications by reducing the sulfur content of the addition of biodiesel fuel to diesel where this fuel is free of sulfur and has a thermal energy that approaches to diesel.20%, 30% and 50% of Biodiesel fuel were added to the conventional diesel. Performance tests and pollutants of a four-stroke single-cylinder diesel engine were performed. The results indicated that the brake thermal efficiency a decreased by (4%, 16%, and 22%) for the B20, B30 and B50, respectively. The increase in specific fuel consumption was (60%, 33%, and 11%) for the B50, B30, and B20 fuels, respectively for the used fuel blends compared to neat diesel fuel. The engine exhaust gas emissions measures manifested a decreased of CO and HC were CO decreased by (13%), (39%) and (52%), and the HC emissions were lower by (6.3%), (32%), and (46%) for B20, B30 and B50 respectively, compared to diesel fuel. The reduction of exhaust gas temperature was (7%), (14%), and (32%) for B20, B30 and B50 respectively. The NOx emission increased with the increase in biodiesel blends ratio. For B50, the raise was (29.5%) in comparison with diesel fuel while for B30 and B20, the raise in the emissions of NOx was (18%) and...

Polymer-Bound Triphenylphosphine and 4,4′-Dinitroazobenzene as a Coupling Reagents for Chromatography-Free Esterification Reaction

2019 ◽  
Vol 16 (7) ◽  
pp. 1024-1031
Author(s):  
Diparjun Das ◽  
Kalyani Rajkumari ◽  
Lalthazuala Rokhum
Keyword(s):  
Microwave Irradiation ◽  
Solid Phase ◽  
Reaction System ◽  
Triphenylphosphine Oxide ◽  
High Yield ◽  
Sustainable Chemistry ◽  
Esterification Reaction ◽  
Coupling Reagent ◽  
Simple Filtration ◽  
Esterification Reactions

Aim and Objective: Sustainable production of fine chemicals both in industries and pharmaceuticals heavily depends on the application of solid-phase synthesis route coupled with microwave technologies due to their environmentally benign nature. In this report, a microwave-assisted esterification reaction using polymer-bound triphenylphosphine and 4,4′-dinitroazobenzene reagent system was investigated. Materials and Methods: The solvents were obtained from Merck India. Polymer-bound triphenylphosphine (~3 mmol triphenylphosphine moiety/g) was acquired from Sigma-Aldrich. The progress of the reaction was observed by thin-layer chromatography. All the reactions were performed in Milestones StartSYNTH microwave. The NMR spectra were recorded on Bruker Avance III 300, 400, and 500 MHz FT NMR Spectrometers. Using azo compound and polymer-bound triphenyl phosphine as a coupling reagent, esterification of different carboxylic acids with alcohols was performed under microwave irradiation. Results: Esterification of benzoic acid with 1-propanol under microwave irradiation gave a high yield of 92% propyl benzoate in 60 minutes only. Isolation of the ester products was relatively simple as both the byproducts polymer-bound triphenylphosphine oxide and hydrazine could be removed by simple filtration. The rates of reactions were found to be directly proportional to the pKa of the benzoic acids. Conclusion: 4,4′-Dinitroazobenzene was introduced as a novel coupling reagent, in conjugation with polymer-bound triphenylphosphine, for esterification reactions under microwave irradiation. The low moisture sensitivity of the reaction system, easy separation of the byproducts, and column chromatographyfree isolation of esters help our methods with application significance, particularly from the ‘Sustainable Chemistry’ perspective.

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