Month: December 2022

Haarmann, Niklas published the artcileMeasurement and Prediction of Excess Properties of Binary Mixtures Methyl Decanoate + an Even-Numbered n-Alkane (C6-C16) at 298.15 K, HPLC of Formula: 110-42-9, the main research area is excess property binary mixture methyl decanoate alkane prediction measurement.

The molar excess volumes vE of the three binary mixtures Me decanoate + n-alkane (n-dodecane, n-tetradecane, and n-hexadecane) were measured at temperature T = 298.15 K and atm. pressure using a vibrating tube densitometer. Furthermore, the molar excess enthalpies hE of the six binary mixtures Me decanoate + n-alkane (n-hexane, n-octane, n-decane, n-dodecane, n-tetradecane, and n-hexadecane) were measured at the same ambient conditions using a Calvet microcalorimeter. Both excess properties showed an increase with the increasing chain length of the n-alkane. Two equations of state, i.e., a heterosegmental approach of Perturbed Chain Statistical Associating Fluid Theory (PC-SAFT) and SAFT-γ Mie, were applied to predict the excess properties of the resp. binary mixtures Very satisfying agreement between the exptl. data and modeling results was obtained for both equations of state.

Journal of Chemical & Engineering Data published new progress about Binary mixtures, liquid. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, HPLC of Formula: 110-42-9.

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

Yuan, Sisi published the artcileEfficient demulsification of cationic polyacrylate for oil-in-water emulsion: Synergistic effect of adsorption bridging and interfacial film breaking, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is oil water emulsion cationic polyacrylate demulsification synergism adsorption film.

The development of reverse demulsifier is an urgent need for the increasing amount of produced liquid in oilfield. Synthesis of reverse demulsifier containing multiple characteristics is an effective method. In view of this, this study reports a series of cationic polyacrylates as the reverse demulsifiers, which were prepared by using 3-chloro-1-propanol to modify the copolymer of acrylate and N-[3-(dimethylamino) propyl] methacryamide (DMAPMA). The properties and performance tests showed that the PMD1 prepared by using Me acrylate (MA) as monomer (mass ratio of MA to DMAPMA was 2:1) has well water solubility, high interfacial activity, and the best demulsification efficiency. For treating the produced liquid from an offshore oilfield, demulsification efficiency of PMD1 was 94.7% with 50 mg/L dosage, which was much higher than that of the reagent in use (15.7%). Furthermore, the demulsification mechanism of PMD1 was studied by oil-water partition coefficient experiment, zeta potential measurement, optical tweezers method, elastic modulus measurement, and coalescence kinetics experiment Prominent demulsification ability of PMD1 was attributed to the synergistic effect of adsorption bridging via cationic group and oil/water interfacial film breaking by acrylate group. The cationic polyacrylate combines the advantages of polyacrylate and polycation reverse demulsifiers, which display a great application prospect in the petroleum industry.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects published new progress about Adsorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Recommanded Product: Dodecyl 2-methylacrylate.

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

Bernhard, Yann published the artcileOne-Pot Synthesis of 2,5-Disubstituted Furans through In Situ Formation of Allenes and Enolization Cascade, Product Details of C7H12O3, the main research area is furan preparation ketoacid enolization cyclization cascade.

A one-pot synthesis of 2,5-disubstituted furans from γ-ketoacids is reported. In situ formation of allenoates by action of chloroformate on carboxylic acid following by enolization of ketone affords furan derivatives by cyclization. The reaction was extended to a wide scope of ketoacids and phosphonium salts. This methodol. was applied on levulinic acid and derivatives, one of the biosourced platform chems.

European Journal of Organic Chemistry published new progress about Carboxylic acids Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Product Details of C7H12O3.

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

McCourt, Ruairi O. published the artcileAtmospheric Oxygen Mediated Radical Hydrothiolation of Alkenes, Safety of Ethyl 4-oxopentanoate, the main research area is alkene thiol atm oxygen mediated radical hydrothiolation; green chemistry; hydrothiolation; initiation; radical; thiol-ene.

A mild, metal-free, atm. oxygen-mediated radical hydrothiolation of alkenes (and alkyne) was reported. A variety of sulfur containing motifs including alkanethiols, thiophenols and thioacids undergo an atm. oxygen-mediated radical hydrothiolation reaction with a plethora of alkenes in good yield with excellent functional group compatibility, typically with short reaction times to furnished a range of functionalized products. Biomols. proved tolerant to the conditions and the procedure was robust and easily executable requiring no specialized equipment. Concise mechanistic studies confirmed that the process proceeded through radical intermediates in a thiol-ene reaction manifold. The methodol. offered an efficient “”green”” approach for thiol-ene mediated “”click”” ligation and a milder alternative to thermally initiated hydrothiolation processes.

Chemistry – A European Journal published new progress about Green chemistry. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Safety of Ethyl 4-oxopentanoate.

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

McCourt, Ruairi O. published the artcileAtmospheric Oxygen Mediated Radical Hydrothiolation of Alkenes, Computed Properties of 583-04-0, the main research area is alkene thiol atm oxygen mediated radical hydrothiolation; green chemistry; hydrothiolation; initiation; radical; thiol-ene.

A mild, metal-free, atm. oxygen-mediated radical hydrothiolation of alkenes (and alkyne) was reported. A variety of sulfur containing motifs including alkanethiols, thiophenols and thioacids undergo an atm. oxygen-mediated radical hydrothiolation reaction with a plethora of alkenes in good yield with excellent functional group compatibility, typically with short reaction times to furnished a range of functionalized products. Biomols. proved tolerant to the conditions and the procedure was robust and easily executable requiring no specialized equipment. Concise mechanistic studies confirmed that the process proceeded through radical intermediates in a thiol-ene reaction manifold. The methodol. offered an efficient “”green”” approach for thiol-ene mediated “”click”” ligation and a milder alternative to thermally initiated hydrothiolation processes.

Chemistry – A European Journal published new progress about Green chemistry. 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Computed Properties of 583-04-0.

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

Koley, Debasis published the artcileIsomerization of Functionalized Olefins by Using the Dinuclear Catalyst [PdI(μ-Br)(PtBu3)]2: A Mechanistic Study, COA of Formula: C10H10O2, the main research area is olefin isomerization dinuclear palladium catalyst; palladium catalyzed isomerization mechanistic study; density-functional theory; isomerization; palladium; reaction mechanisms; stereoselectivity.

In a combined exptl. and computational study, the isomerization activity of the dinuclear palladium(I) complex [PdI(μ-Br)(PtBu3)]2 towards allyl arenes, esters, amides, ethers, and alcs. has been investigated. The calculated energy profiles for catalyst activation for two alternative dinuclear and mononuclear catalytic cycles, and for catalyst deactivation are in good agreement with the exptl. results. Comparison of exptl. observed E/Z ratios at incomplete conversion with calculated kinetic selectivities revealed that a substantial amount of product must form via the dinuclear pathway, in which the isomerization is promoted cooperatively by two palladium centers. The dissociation barrier towards mononuclear Pd species is relatively high, and once the catalyst enters the energetically more favorable mononuclear pathway, only a low barrier has to be overcome towards irreversible deactivation.

Chemistry – A European Journal published new progress about Diastereoselective synthesis. 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, COA of Formula: C10H10O2.

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

Wang, Tao published the artcileA 3,4-dimercapto-3-cyclobutene-1,2-dione-chelated ruthenium carbene catalyst for Z-stereoretentive/stereoselective olefin metathesis, Related Products of esters-buliding-blocks, the main research area is dimercaptocyclobutenedione chelated ruthenium carbene catalyst preparation; olefin diastereoselective preparation; butenediol alkene cross metathesis ruthenium catalyst; alkene homometathesis ruthenium catalyst.

A ruthenium carbene catalyst chelated with a 3,4-dioxocyclobut-1-ene-1,2-dithiolate ligand was synthesized and its mol. structure was determined by single-crystal x-ray diffraction. The Ru catalyst had excellent catalytic activity with high yields and good Z/E ratios for the ring-opening metathesis polymerization (ROMP) of norbornene and for ring-opening cross metathesis (ROCM) reactions of norbornene/5-norbornene-2-exo, 3-exo-dimethanol with styrenes. The catalyst also had high Z-stereoretentivity (91:9-98:2) for cross-metathesis (CM) reactions of terminal olefins with (Z)-2-butene-1,4-diol. Like other Ru carbene complexes, the catalyst tolerates many different functional groups. The presented data, supported by DFT calculations, showed that the catalyst, bearing a chelating 3,4-dioxocyclobut-1-ene-1,2-dithiolate ligand, exhibited higher stability towards air than Hoveyda’s stereoretentive complex systems.

Dalton Transactions published new progress about Cross-metathesis. 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Related Products of esters-buliding-blocks.

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

Wang, Juan-Juan published the artcileAnti-Markovnikov Hydroazidation of Alkenes by Visible-Light Photoredox Catalysis, Name: Allyl benzoate, the main research area is alkene anti Markovnikov hydroazidation regioselective photocatalyst; hydroazidation; photoredox catalysis; radical reactions; trimethylsilyl azide; water.

The anti-Markovnikov hydroazidation of alkenes has been accomplished under visible-light irradiation by using [Ir(dF(CF3)ppy)2(dtbbpy)]PF6 as the photocatalyst and trimethylsilyl azide as the azidating agent. The reactions were greatly facilitated by water, the beneficial effect of which can be attributed to its participation in the reaction as the hydrogen donor, as indicated by deuterium isotope experiments The reactions proceed under solvent free conditions in the presence of water. 4-Dimethylaminopyridine also exhibited a beneficial effect on the reactions. The present method enabled hydroazidation of several types of unactivated alkenes with good yields and high regioselectivity.

Chemistry – A European Journal published new progress about Azidation (hydro). 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Name: Allyl benzoate.

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

Guo, Lei published the artcileSelective, Intermolecular Alkylarylation of Alkenes via Photoredox/Nickel Dual Catalysis, Recommanded Product: Allyl benzoate, the main research area is photoredox nickel catalyzed alkylarylation alkene aryl halide alkyl oxalate.

A regioselective, intermol. 1,2-alkylarylation of alkenes with aryl halides and alkyl oxalates has been developed via photoredox/nickel dual catalysis. This dual-catalytic protocol involves a radical relay process, where radical addition is followed by a nickel-assisted coupling, forging two consecutive C-C bonds in a single operation. The mild and redox-neutral conditions allow for good compatibility in the scope of olefins, (hetero)aryl halides, as well as alkyl oxalates.

Organic Letters published new progress about Aryl halides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Recommanded Product: Allyl benzoate.

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

Tu, Hai-Yong published the artcileEnantioselective Three-Component Fluoroalkylarylation of Unactivated Olefins through Nickel-Catalyzed Cross-Electrophile Coupling, Quality Control of 583-04-0, the main research area is nickel catalyzed enantioselective three component fluoroalkylarylation olefin.

A nickel-catalyzed, enantioselective, three-component fluoroalkylarylation of unactivated alkenes with aryl halides and perfluoroalkyl iodides has been described. This cross-electrophile coupling protocol utilizes a chiral nickel/BiOx system as well as a pendant chelating group to facilitate the challenging three-component, asym. difunctionalization of unactivated alkenes, providing direct access to valuable chiral β-fluoroalkyl arylalkanes with high efficiency and excellent enantioselectivity. The mild conditions allow for a broad substrate scope as well as good functional group toleration. Thus, e.g., allylic ester I + 5-bromo-2-(trifluoromethyl)pyrimidine + IC4F9 → II (87%, 94:6 er).

Journal of the American Chemical Society published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Quality Control of 583-04-0.

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