Category: 627-93-0

Abuhafez, Naba published the artcileRuthenium-catalysed oxidative coupling of vinyl derivatives and application in tandem hydrogenation, Computed Properties of 627-93-0, the publication is Catalysis Science & Technology (2021), 11(17), 5772-5776, database is CAplus.

The first ruthenium-catalyzed oxidative homo- and cross-coupling of exclusive vinyl derivatives RC(R¹)=CH₂ (R = methoxycarbonyl, butoxycarbonyl, Ph, etc.; R¹ = H, Me) giving highly valued 1,3-diene building blocks (Z,E/E,E/Z,Z)-RC(R¹)=CHCH=C(R¹)R is reported. The catalytic system is based on readily available reagents and it mainly delivers the E,E isomer. This methodol. also enables the synthesis of adipic acid ester derivatives R(CH₂)₄R (R = methoxycarbonyl, butoxycarbonyl) in a one-pot fashion after in situ ruthenium-catalyzed hydrogenation.

Catalysis Science & Technology published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Computed Properties of 627-93-0.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Treacy, Sean M. published the artcileCopper Catalyzed C(sp³)-H Bond Alkylation via Photoinduced Ligand-to-Metal Charge Transfer, Recommanded Product: Dimethyl adipate, the publication is Journal of the American Chemical Society (2021), 143(7), 2729-2735, database is CAplus and MEDLINE.

The functionalization of numerous feedstock chems. via the coupling of unactivated C(sp³)-H bonds with electron-deficient olefins was reported. The active cuprate catalyst undergoes ligand-to-metal charge transfer enabled the generation of a chlorine radical which acted as a powerful hydrogen atom transfer reagent capable of abstracting strong electron-rich C(sp³)-H bonds. Of note is that the chlorocuprate catalyst was an exceedingly mild oxidant (0.5 V vs SCE) and that a proposed protodemetalation mechanism offered a broad scope of electron-deficient olefins, offered high diastereoselectivity in the case of endocyclic alkenes. The coupling of chlorine radical generation with Cu reduction through LMCT enabled the generation of a highly active HAT reagent in an operationally simple and atom economical protocol.

Journal of the American Chemical Society published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C12H17NO2, Recommanded Product: Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Han, Li-Jun published the artcilePalladium-Catalyzed Methoxycarbonylation of 1,3-Butadiene to Methyl-3-Pentenoate: Introduction of a Continuous Process, Recommanded Product: Dimethyl adipate, the publication is Journal of Catalysis (2021), 283-290, database is CAplus.

The base-assisted Pd(cod)Cl₂/xantphos-catalyzed methoxycarbonylation of 1,3-butadiene (BD) to methyl-3-pentenoate (MP) was explored. Mechanistic studies suggested excessive xantphos (beyond an equimolar amount per Pd) as well as its substitute, pyridines of proper steric and electronic functionality, do participate catalytic cycle and significantly reduce activation energy by accelerating rate-limiting methanolysis step. As thus, all reaction parameters, especially solvents, were optimized based on Pd(cod)Cl₂/Xantphos/4-hexylpyridine catalytic system, enabling construction of a continuous process. Systematic optimization demonstrated that a yield of 82% of MP with a purity of 99.8% could be reached under steady-state operation.

Journal of Catalysis published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Recommanded Product: Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Blanchard, Lucien published the artcileMelt polycondensation for the synthesis of polyester amides using kneader reactor technology, Name: Dimethyl adipate, the publication is Chimia (2020), 74(12), 1024-1025, database is CAplus and MEDLINE.

In this work, we discuss the process development and scale-up of the melt polycondensation of polyester amides from a laboratory scale to kg-scale in a kneader reactor. We identified and optimized the most important critical parameters and produced kg-quantities of polyester amides with Mn up to 25’000 g/mol and reproducible thermal and mech. properties. The special kneader reactor allows safe and efficient scale-up of polymerization reactions at high temperature and viscous melts due to good mixing and efficient mass transfer.

Chimia published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Name: Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Grozdanic, Nikola published the artcileVolumetric properties of binary mixtures of tetrahydrofuran, dimethyl adipate, 1-butanol and 2-butanol from (288.15 to 323.15) K and modeling by Prigogine-Flory-Patterson (PFP) and Extended Real Association Solution (ERAS) models, Safety of Dimethyl adipate, the publication is Journal of Molecular Liquids (2021), 117313, database is CAplus.

In this work, exptl. densities data of the binary system THF + 2-butanol have been determined at eight temperatures, T=(288.15-323.15) K and atm. pressure and used for excess molar volume calculations Also, partial molar volumes, excess partial molar volumes and partial molar volumes at infinite dilutions were calculated for further non-ideal behavior of binary mixture Excess molar volume, VE, of exptl. determined system THF + 2-butanol, and four previously published binary systems, THF + 1-butanol, di-Me adipate + 1-butanol, di-Me adipate + 2-butanol and di-Me adipate + THF were correlated with two models, Prigogine-Flory-Patterson (PFP) and Extended Real Association Solution (ERAS). In order to apply the proposed models addnl. data of ultrasonic speed of sounds for pure components, di-Me adipate, THF, 1-butanol and 2-butanol, were measured in the temperature range T=(288.15-323.15) K and at atm. pressure. Volumetric coefficients, thermal expansion coefficient α and isothermal compressibility κ were calculated from d., ultrasonic speed of sound and isobaric heat capacity data. Isobaric molar heat capacities Cp,m at all temperatures for all pure components were obtained by correlation of literature data. Both models, PFP and ERAS were used for anal. of mol. interactions present in the investigated solutions

Journal of Molecular Liquids published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Safety of Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Cobo-Golpe, M. published the artcilePortable dehumidifiers condensed water: A novel matrix for the screening of semi-volatile compounds in indoor air, Name: Dimethyl adipate, the publication is Chemosphere (2020), 126346, database is CAplus and MEDLINE.

The comprehensive identification of organic species existing in indoor environments is a key issue to understand their impact in human health. This study proposes the anal. of condensed water samples, collected with portable dehumidifiers, to characterize semi-volatile compounds in the gas phase of confined areas. Water samples are concentrated by solid-phase extraction (SPE). The obtained extracts are analyzed by gas chromatog. (GC) time-of-flight mass spectrometry (TOF-MS), following a non-target screening data mining approach. In first term, spectra of deconvoluted compounds are compared with those in NIST low resolution library; thereafter, tentative identifications are verified using an inhouse database of accurate electron ionization (EI) MS spectra. Chromatog. (retention index) and spectral data are combined for unambiguous species identification. The potential of condensed water samples to reflect changes in the composition of indoor atmospheres, the match between data obtained using different dehumidifiers, and the relative concentration efficiency of condensed water compared to that attained by active sampling of moderate air volumes are discussed. A total of 141 semi-volatile compounds were identified (98 confirmed against authentic standards) in a set of 21 samples obtained from different homes and working places. This list contains more than 40 fragrances (including several potential allergens), solvents and intermediates in the production of polymeric materials, plasticizers and flame retardants.

Chemosphere published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Name: Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Hocevar, Brigita published the artcileH₂-Free Re-Based Catalytic Dehydroxylation of Aldaric Acid to Muconic and Adipic Acid Esters, COA of Formula: C8H14O4, the publication is Angewandte Chemie, International Edition (2021), 60(3), 1244-1253, database is CAplus and MEDLINE.

As one of the most demanded dicarboxylic acids, adipic acid can be directly produced from renewable sources. Hexoses from (hemi)cellulose are oxidized to aldaric acids and subsequently catalytically dehydroxylated. Hitherto performed homogeneously, we present the first heterogeneous catalytic process for converting an aldaric acid into muconic and adipic acid. The contribution of leached Re from the solid pre-reduced catalyst was also investigated with hot-filtration test and found to be inactive for dehydroxylation. Corrosive or hazardous (HBr/H₂) reagents are avoided and simple alcs. and solid Re/C catalysts in an inert atm. are used. At 120°C, the carboxylic groups are protected by esterification, which prevents lactonization in the absence of water or acidic sites. Dehydroxylation and partial hydrogenation yield monohexenoates (93%). For complete hydrogenation to adipate, a 16% higher activation barrier necessitates higher temperatures

Angewandte Chemie, International Edition published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, COA of Formula: C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Lo Turco, Vincenzo published the artcilePlasticizers and BPA in spices and aromatic herbs of Mediterranean areas, COA of Formula: C8H14O4, the publication is Natural Product Research (2020), 34(1), 87-92, database is CAplus and MEDLINE.

This research is carried out in order to characterize the actual contamination by two ubiquitous environmental pollutants, plasticizers and Bisphenol A, in spices (black pepper, caraway and coriander) and aromatic herbs (fennel, laurel, mint, oregano, rosemary, thyme and verbena) from Algeria (n = 26), Tunisia (n = 65) and Italy (n = 53). Algerian samples seem to contain fewer residues than Italian and Tunisian samples. Among the Italian samples, only aromatic herbs, precisely mint, oregano, and laurel, were contaminated. In general, all Tunisian samples showed five plasticizers residues: the caraway, among the spices, and the rosemary, among the aromatic herbs, are found to contain more residues. Also, dietary intake of these contaminants by spices and aromatic herbs under anal. seems not to constitute a risk to the consumers.

Natural Product Research published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, COA of Formula: C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Aubrecht, Jaroslav published the artcileDo metal-oxide promoters of Cu hydrogenolysis catalysts affect the Cu intrinsic activity?, Application of Dimethyl adipate, the publication is Applied Catalysis, A: General (2020), 117889, database is CAplus.

The well-established ester hydrogenolysis process has to be further improved to reduce its high energy demand and to replace used Adkins CuCr catalysts by chromium-free alternatives. In this study, the copper-based catalyst was modified by ZnO, ZnO with Al₂O₃ or MgO to elucidate the metal-oxide influence on catalyst structure, activity, performance and stability in ester hydrogenolysis. The catalysts composition, structure and physicochem. properties were examined by AAS, XRD, TPR, BET, N₂O-RFC, TGA-MS, NH₃-TPD and CO₂-TPD. It was confirmed that copper itself possesses high intrinsic activity for ester hydrogenolysis but the unpromoted copper species were very unstable. All used metal oxides were proven to be structural promoters stabilizing copper species and increasing the number of active sites. Consequently, they enhanced remarkably catalyst performance in di-Me adipate conversion despite the decreased intrinsic activity of Cu active sites. All prepared catalysts outperformed a com. CuCr catalyst in di-Me adipate hydrogenolysis.

Applied Catalysis, A: General published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Application of Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Aubrecht, Jaroslav published the artcileUnderstanding of the key properties of supported copper-based catalysts and their influence on ester hydrogenolysis, SDS of cas: 627-93-0, the publication is Catalysis Today (2022), 173-181, database is CAplus.

The application of Cr-free Cu-based catalysts in ester hydrogenolysis is a modern environmentally-friendly research approach. The comprehensive study of four supported Cu-based catalysts was performed using 8 wt% of Cu loaded on Al₂O₃, ZnO, TiO₂ and ZrO₂ supports by an impregnation method. Using XRD, H₂-TPR, BET, pyridine-TPD, CO₂-TPD and N₂O-RFC methods, the effect of the support on the formation of Cu-nanoparticles was described. Al₂O₃ was evaluated as the support ensuring the highest nanoparticles dispersion, while Cu nanoparticles in Cu-TiO₂ were liable to sintering. The catalysts were tested in di-Me adipate hydrogenolysis, where the catalyst performance and activity (TOF) were evaluated and Cu-ZrO₂ showed the best results. A correlation between the number of acid-base sites and the catalyst selectivity was revealed and the catalyst effect on the formation of various byproducts was described. The intrinsic selectivity to hydrogenolysis products was found to decrease with the increasing acid-base character of the supports whereas the selectivity to transesterification and cyclization products increased. The hydrogenolysis activity was not a simple function of the number of the surface copper atoms, but it was affected by the support nature and its properties.

Catalysis Today published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, SDS of cas: 627-93-0.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics