Category: esters-buliding-blocks

Halder, Mita; Bhanja, Piyali; Islam, Mominul Md.; Chatterjee, Sauvik; Khan, Aslam; Bhaumik, Asim; Islam, Sk. Manirul published the artcile< Porous organic polymer as an efficient organocatalyst for the synthesis of biofuel ethyl levulinate>, Quality Control of 112-63-0, the main research area is organocatalyst biofuel ethyl levulinate synthesis porous organic polymer.

Levulinic acid (LA), a lignocellulosic biomass-derived compound has been recognized as one of the versatile building blocks for the synthesis of commodity chems. having biofuel properties together with potential as precursor for the synthesis of several value-added pharmaceuticals and polymers. Herein, we report the synthesis of catalytically active functionalized porous organic polymer and its utilization as heterogeneous organocatalyst for the synthesis of EL from LA in very high yield. Here, sulfonic acid functionalized porous organic polymer SBZ@POP have been prepared via simple Friedel-Crafts alkylation of benzene with dimethoxymethane followed by sulfonation of the aromatic rings. The structure and properties of the material was examined through PXRD, N2 sorption, HR TEM, 13C CP-MAS NMR, NH3-TPD, TG-DTA and FTIR anal. Our characterization data suggested nanoscale porosity with high surface acidity in SBZ@POP. The effects of reaction time, catalyst loading, molar ratio of levulinic acid to ethanol and reaction temperature were studied thoroughly to optimize the catalytic activity of SBZ@POP. Under optimized reaction conditions EL yield of 88 % has been achieved with 1:15 molar ratio of LA to ethanol under refluxing conditions in 10 h. This porous organic polymer based organocatalyst displayed good recyclability for consecutive five reaction cycles suggesting the sustainable application potential of this acidic organocatalyst.

Molecular Catalysis published new progress about Density functional theory. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Lanaya, Salaheddine; El Jemli, Yousra; Khallouk, Khadija; Abdelouahdi, Karima; Hannioui, Abdellah; Solhy, Abderrahim; Barakat, Abdellatif published the artcile< Sulfated Well-Defined Mesoporous Nanostructured Zirconia for Levulinic Acid Esterification>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is sulfated zirconia mesoporous nanostructure catalyst levulinic acid esterification.

Well-organized zirconia (ZrO2) nanoparticles forming mesoporous materials were successfully synthesized via a facile micelle-templating method using cetyltrimethylammonium bromide as a structure-directing template to control the nucleation/growth process and porosity. The systematic use of such a surfactant in combination with a microwave-assisted solvothermal (cyclohexane/water) reaction enabled the control of pore size in a narrow-size distribution range (3-17 nm). The effect of solvent mixture ratio on the porosity of the synthesized oxide was determined, and the controlled growth of zirconia nanoparticles was confirmed by means of powder X-ray diffraction, small-angle X-ray scattering, transmission electron microscopy, selected area electron diffraction, high-resolution transmission electron microscopy, XPS, thermogravimetric anal., and Fourier transform IR spectroscopy as well as N2 physisorption isotherm anal. Then, the as- prepared nanostructured zirconia oxides were treated with sulfuric acid to have sulfated samples. The catalytic performances of these mesoporous zirconia nanoparticles and their sulfated samples were tested for levulinic acid (LA) esterification by ethanol, with quant. conversions of LA to Et levulinate after 8 h of reaction.

ACS Omega published new progress about Binding energy. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhang, Qiao-zhen; Xiao, Dong-guang published the artcile< Comparisons of different extraction fibers for analysis of aroma compounds in Litchi wine>, HPLC of Formula: 112-63-0, the main research area is extraction fiber aroma compound Litchi wine.

The aroma compounds of Litchi wine were analyzed by head space solid-phase micro-extraction (HS-SPME) coupled to gas chromatog.-mass spectrometry (GC-MS). Extraction characteristics of three different coating of extraction fibers were compared. The results indicated that the 65 μm PDMS/DVB was the best in the same exptl. conditions.

Tianjin Keji Daxue Xuebao published new progress about Fibers Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yu, Bo; Zhang, Hongye; Zhao, Yanfei; Chen, Sha; Xu, Jilei; Hao, Leiduan; Liu, Zhimin published the artcile< DBU-Based Ionic-Liquid-Catalyzed Carbonylation of o-Phenylenediamines with CO2 to 2-Benzimidazolones under Solvent-Free Conditions>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is DBU acetate ionic liquid catalyst carbonylation phenylenediamine carbon dioxide; benzimidazolone preparation.

2-Benzimidazolones were prepared via carbonylation of o-phenylenediamines with CO2 catalyzed by 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-based ionic liquids under solvent-free conditions. DBU acetate ([DBUH][OAc]) displayed high efficiency for catalyzing the reactions of CO2 with o-phenylenediamines, and a series of benzimidazolones were obtained in high yields. It was demonstrated that [DBUH][OAc] could serve as a bifunctional catalyst for these reactions with the cation activating CO2 and the anion activating o-phenylenediamines. This protocol provides an effective and environmentally friendly alternative route for production of benzimidazolones, and extends the chem. utilization of CO2 in organic synthesis as well.

ACS Catalysis published new progress about Aromatic diamines Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Majkutewicz, Irena published the artcile< Dimethyl fumarate: A review of preclinical efficacy in models of neurodegenerative diseases>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is review dimethyl fumarate preclin efficacy neurodegenerative disease; Alzheimer’s disease; Amyotrophic lateral sclerosis; Dimethyl fumarate; Huntington’s disease; Neurodegenerative diseases; Parkinson’s disease.

A review. Di-Me fumarate (DMF) is an antioxidative and anti-inflammatory drug approved for treatment of multiple sclerosis and psoriasis; however, beneficial effects of DMF have also been found in other inflammatory diseases and cancers. DMF is a prodrug that is immediately hydrolyzed to monomethyl fumarate (MMF) in vivo. Both fumarates activate the nuclear factor (erythroid-derived 2)-like 2 (Nrf2) pathway, and Nrf2 is a key transcription factor of the antioxidant response. The immunosuppressive and anti-inflammatory actions of DMF occur through several mechanisms: via inhibition of the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) pathway and by downregulation of aerobic glycolysis and pyroptosis in activated myeloid and lymphoid cells. MMF is also an agonist of hydroxycarboxylic acid receptor 2 (HCAR2). Differences in the strength of effects and mechanisms of action of both fumarates are discussed. The aim of this review was to analyze and compare the neuroprotective, antioxidative and anti-inflammatory effects of DMF and its active metabolite, MMF, in cellular (in vitro) and animal models of neurodegenerative diseases (NDs), other than multiple sclerosis. There are more than twenty studies that currently represent this field. Most of the studies are concerned with cellular or animal models of Alzheimer ‘s disease (AD) and Parkinson ‘s disease (PD), one utilized a mouse model of Huntington ‘s disease (HD) and one clin. trial was carried out with amyotrophic lateral sclerosis (ALS) patients. The discrepancies in the results of the various studies are discussed, and issues requiring further research have been identified.

European Journal of Pharmacology published new progress about Alzheimer disease. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhang, Zhiyong; Lan, Qing; Yu, Yao; Zhou, Jungang; Lu, Hong published the artcile< Comparative metabolome and transcriptome analyses of the properties of Kluyveromyces marxianus and Saccharomyces yeasts in apple cider fermentation>, Quality Control of 112-63-0, the main research area is Kluyveromyces marxianus Saccharomyces apple cider fermentation metabolome transcriptome analysis; Apple cider; Aroma; Kluyveromyces marxianus; Nonvolatile; Saccharomyces yeasts; Transcriptome.

This study explored the application of Kluyveromyces marxianus and Saccharomyces cerevisiae (com. and wild type) in the alc. fermentation of Fuji apple juice under static conditions. Metabolome analyses revealed that Et esters, including Et hexanoate, Et decanoate, Et octanoate, octanoic acid and decanoic acid, were the dominant components in ciders fermented by the Saccharomyces yeasts. In the K. marxianus ciders, Et acetate, hexyl acetate, Pr acetate and acetic acid were the most abundant volatiles, suggesting that the cider fermented by K. marxianus might have a fruitier smell. Transcriptome analyses were adapted to gain insight into the differential metabolite patterns between K. marxianus and S. cerevisiae during cider fermentation GO and KEGG enrichments revealed that the metabolic pathways of glucose, organic acids and amino acids during cider fermentation were quite different between these two yeasts. The K. marxianus strain exhibited a higher rate of glycolysis and ethanol fermentation than did Saccharomyces yeasts under oxygen-limited conditions. It also reduced the metabolic flux of acetate into acetyl-CoA and then into the TCA cycle, increasing the syntheses of Et acetate and relevant esters, which may affect its cell growth under anaerobic conditions but enriched the taste and variety of aromas in apple cider.

Food Chemistry: Molecular Sciences published new progress about Acids Role: FFD (Food or Feed Use), BIOL (Biological Study), USES (Uses). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Kim, Soyoun; Liu, Nan; Shestopalov, Alexander A. published the artcile< Contact Printing of Multilayered Thin Films with Shape Memory Polymers>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is shape memory polymer multilayer thin film transfer printing; adhesion modulation; donor substrate; shape memory polymer; thin-film printing; transfer printing.

This study describes a method for transfer printing microarrays of multilayered organic-inorganic thin films using shape memory printing stamps and microstructured donor substrates. By applying the films on the microstructured donor substrates during phys. vapor deposition and modulating the interfacial adhesion using a shape memory elastomer during printing, this method achieves (1) high lateral and feature-edge resolution and (2) high transfer efficiency from the donor to the receiver substrate. For demonstration, polyurethane-acrylate stamps and silicon/silicon oxide donor substrates were used in the large-area transfer printing of organic-inorganic thin-film stacks with micrometer lateral dimensions and sub-200 nm thickness.

ACS Nano published new progress about Adhesion, physical, interfacial. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Andersons, J.; Kirpluks, M.; Cabulis, P.; Kalnins, K.; Cabulis, U. published the artcile< Bio-based rigid high-density polyurethane foams as a structural thermal break material>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is polyurethane foam thermal break material.

Sustainable development of building industry implies increasing usage of green materials. With this aim and for the intended application as a structural thermal break material, rigid high-d. polyurethane foams have been manufactured using polyols derived from renewable resources – tall oil fatty acids. Thermal conductivity, compressive strength and stiffness of the foams of d. ranging from ca. 100 to 680 kg/m3 have been determined Comparison of the bio-based foams with reference foams derived from petrochem. resources demonstrated similar performance characteristics thus suggesting that bio-based foams can also serve as structural thermal break materials. Anal. models are shown to enable estimation of d. dependence of the thermal and mech. properties of foams using the resp. exptl. determined characteristics of the monolithic polyurethane polymer.

Construction and Building Materials published new progress about Compressive modulus. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Baudoux, Jerome; Cahard, Dominique published the artcile< Electrophilic fluorination with N-F reagents>, COA of Formula: C19H34O2, the main research area is review.

A review. The preparation and use of electrophilic fluorinating agents containing the N-F moiety to give a C-f bond is reviewed.

Organic Reactions (Hoboken, NJ, United States) published new progress about Organic synthesis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Mamedov, Shamkhal; Gadzhiev, F. R.; Rzaev, A. S. published the artcile< Ethers of glycols and their derivatives. LXVII. Synthesis of alkoxymethyl ethers of ο- and p-ethylbenzyl alc>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is .

By the alk. method there were synthesized several new alkoxy derivatives of the Me ether of ο- and p-ethylbenzyl alc. and the ο- and p-monoethylbenzyl ether of ethylene glycol. To a mixture of ο- and p-ethylbenzyl alc. (16.3 g.), 21.78 g. PhNMe2, and 50 ml. dry Et2O, 24.5 g. α-chloromethyl isoamyl ether was added dropwise, and the mixture stirred and heated 4.5 hrs. at 30-40° and worked up to give 19.32 g. mixture of isopentoxymethyl ethers of ο- and p-ethylbenzyl alc. b5 141-2°, n20D 1.4828, d20 0.9392. Similarly, 9 new alkoxy ether mixtures of general formula ο- and p-EtC6H4CH2OCH2OR were obtained (R, % yield, b.p., n20D, and d20 given): Me, 58.7, b19 127-8°, 1.4972, 0.9877; Et, 60.0, b5 106-7°, 1.4920, 0.9721; iso-Pr, 52.0, b5 113-14°, 1.4857, 0.9523; Pr, 50.0, b5 123-4°, 1.4872, 0.9568; iso-Bu, 59.0, b5 129-30°, 1.4820, 0.9455; Bu, 65.6 b5 135-6°, 1.4840, 0.9483; Am, 60, b5 146-7°, 1.4833, 0.9420; n-C6H13, 66.6, b5 157-8°, 1.4806, 0.9312; and n-C7H15, 59.8, b5 167-8°, 1.4800, 0.9279. To a mixture of 34 g. ethylbenzyl alc., 50 g. acrylonitrile, and 150 ml. dry C6H6 1.5 g. MeONa was added, and the mixture stirred 5 hrs. at 40-50° and worked up to yield 94% mixture (I) of β-cyanoethyl ethers of ο- and p-ethylbenzyl alc., b1 137-8°, n20D 1.5080, d20 1.0108. To 90 g. MeOH saturated with 18 g. HCl 19 g. I was added, and the mixture heated 2 hrs. and worked up to give 48% mixture of β-carbomethoxyethyl ethers of ο- and p-ethylbenzyl alc. (II), b. 133-4°, n20D 1.4970, d20 1.0397. A mixture of 250 ml. MeOH, 13 g. NaOH, 13 ml. H2O, 15 ml. Et2O, and 15.54 g. II was kept 24 hrs., CO2 passed in, and the precipitate worked up to give 67.4% mixture of β-(ο- and p-ethylbenzoxy)propionic acids, b3 178-80°, n20D 1.5185, d20 1.0815. Ethylbenzyl alc. (50 g.) was saturated with gaseous HCHO, dry HCl passed in at 5-10°, and the mixture worked up to give 57% mixture (III) of chloromethyl ο- and p-ethylbenzyl ethers, b2 97-8°, n20D 1.5210, d20 1.0803. To PhONa from 26.5 g. PhOH and 4.6 g. Na, 18.5 g. III was added dropwise, and the mixture stirred and heated 4 hrs. at 50-60° and worked up to give 53% mixture of phenoxymethyl ethers of ο-and p-ethylbenzyl alc., b1 153-5°, n20D 1.5502, d20 1.0530. A mixture of 23.2 g. ethylbenzyl chloride, 37 g. BuOH, and 20 g. powd. NaOH was heated 8 hrs. at 80-90° and worked up to give 76.4% mixture of Bu ο- and p-ethylbenzyl ethers, b. 102-3°, n20D 1.4830, d20 0.9078. Similarly the following ethers of the general formula ο- and p-EtC6H4CH2OR were obtained (R, % yield, b.p., n20D, and d20 given): Pr, 82, b4 92-3°, 1.4910, 0.9178; iso-Bu, 60.0, b4 96-7°, 1.4862, 0.9088; iso-Am, 79.0, b4 108-9°, 1.4834, 0.8998. Am, 80.9, b4 113-14°, 1.4860, 0.9028; n-C6H13, 69.7, b4 128-9°, 1.4855, 0.9008; and n-C7H15, 73.4, b4 141-2°, 1.4850, 0.8981. A mixture of 250 g. ethylene glycol and powdered 100 g. NaOH was heated until the NaOH was dissolved, 154.5 g. ethylbenzyl chloride added dropwise, and the mixture heated with stirring 5 hrs. at 120-30° and worked up to give 52% mixture (IV) of mono ο- and p-ethylbenzyl ethers of ethylene glycol, b2 151-3°, n20D 1.5150, d20 1.0280. A mixture of 18 g. IV, 80.4 g. Ac2O, 50 ml. dry C6H6, and 2 drops H2SO4 was stirred and heated 4 hrs. at 30-40° and worked up to give 65% IV acetate, b2 126-8°, n20D 1.4985, d20 1.0391. To a mixture of 18 g. IV, 18.15 g. PhNMe2, and 50 ml. dry Et2O 18.4 g. chloromethyl Bu ether was added dropwise and the mixture stirred and heated 3 hrs. at 30-40° and worked up to give 51% mixture of ο- and p-ethylbenzyl butoxymethyl ethers of ethylene glycol, b3 157-8°, n20D 1.4809, d20 0.9684. Similarly the following ο- and p-EtC6H4CH2OCH2CH2OCH2OR were obtained (R, % yield, b.p., n20D, and d20 given): Me, 58, b12 156-7°, 1.4912, 1.0105; Et, 54.6, b3 137-9°, 1.4906, 0.9967; iso-Pr, 62.6, b3 147-8°, 1.4827, 0.9772; Pr, 55.5, b3 153-5°, 1.4847, 0.9842. Bu, 71.0, b3 162-3°, 1.4831, 0.9698; iso-Am, 62.8, b3 169-70°, 1.4812, 0.9629, Am, 62.5, b3 175-6°, 1.4821, 0.9659; n-C6H13, 67.7, b3 185-6°, 1.4807, 0.9539; and n-C7H15, 54.0, b3 192-3°, 1.4805, 0.9530.

Azerbaidzhanskii Khimicheskii Zhurnal published new progress about Ethers. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics