Tag: M.W=150-200

Dai, ZengHui published the artcileReactive Diluent Derived from Ferulic Acid for the Preparation of a Fully Biobased Unsaturated Polyester Resin, Recommanded Product: Dimethyl itaconate, the publication is ACS Sustainable Chemistry & Engineering (2020), 8(47), 17379-17386, database is CAplus.

A reactive diluent for the preparation of a fully biobased unsaturated polyester resin (UPR) was developed and is presented here. The diluent, 4-vinylguaiacol acetyl ester (AC4VG), was obtained via a simple two-step synthesis: decarboxylation from ferulic acid (FA) and acetylation of the decarboxylated product, 4-vinylguaiacol (4VG). This diluent shows excellent miscibility with biobased unsaturated polyester prepolymer (UPP) that had been synthesized from succinic acid (SA), 1,3-dihydroxypropane (PD), and itaconic acid (IA). A mixed solution of these possessed a very low viscosity at 174 mPa·s at room temperature when 40 wt% AC4VG was added. Moreover, its vinyl group brought high reactivity for free radical copolymerization with the UPP, and the benzene ring structure enabled a high glass transition temperature (T_g) of the cured UPR. When the fully biobased UPR was reinforced by cotton fabric, a strong tensile strength at the break of approx. 65.8 MPa, a T_g of 135°C, and a T_d5% of 276°C were achieved. This work suggests that the fully biobased UPR reported here is a promising candidate for replacing petroleum-based ones, and the diluent AC4VG played an important role in the performance of this biobased UPR. A biobased reactive diluent, 4-vinylguaiacol acetyl ester, was developed for the preparation of a fully biobased unsaturated polyester resin.

ACS Sustainable Chemistry & Engineering published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C7H10O4, Recommanded Product: Dimethyl itaconate.

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

Liu, Ruo-Chen published the artcileAnalysis of volatile odor compounds and aroma properties of European vinegar by the ultra-fast gas chromatographic electronic nose, Related Products of esters-buliding-blocks, the publication is Journal of Food Composition and Analysis (2022), 104673, database is CAplus.

Vinegar is a very popular condiment with different species and aroma profiles. Eighty-three volatile odor compounds (VOCs) were identified from European vinegar using ultra-fast gas chromatog. electronic nose (UFGC E-nose), of which there were 61 VOCs with odor activity value (OAV) ≥ 1. Among the 61 VOCs, acetic acid, Et isovalerate, propionaldehyde, butanoic acid, Et cinnamate, and guaiacol contributed significantly to the aroma property and type of European vinegar. There were obvious clustering trends of apple vinegar, wine vinegar, and balsamic vinegar in principal component anal. (PCA). The clustering of the vinegar-like groups was more obvious in orthogonal partial least squares discriminant anal. (OPLS-DA). The volatile markers discriminating vinegar, including acetic acid, propionic acid, pyrazine, furfural, iso-Pr alc., and so on, were screened out by variable importance for the projection (VIP). These results demonstrated that UFGC E-nose is a novel, rapid and non-destructive anal. tool and can also be used for identifying aroma compounds and tracing the food species.

Journal of Food Composition and Analysis published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Related Products of esters-buliding-blocks.

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

Wu, YinPing published the artcileStudy on bifunctional acyldiphenylphosphine oxides photoinitiator for free radical polymerization, Synthetic Route of 10287-53-3, the publication is European Polymer Journal (2022), 111093, database is CAplus.

Three novel bifunctional acylphosphineoxide compounds containing diallyl amino group were designed and synthesized as photoinitiators for free radical photopolymerization (FRP) of acrylates. Firstly, the photoinitiation properties of DABPOs (DABPO-1, DABPO-2 and DABPO-3), including their UV-vis spectra, the migration after curing and the solubility in monomers, have been studied and compared with com. photoinitiator 2,4,6-trimethyl(phenyl)diphenyl oxide (TPO). The results show that DABPOs have the red-shift absorption wavelength, higher molar absorption coefficient, lower migration and higher solubility comparing with TPO, and they have higher double bond conversion (DC) in TMPTA monomer than TPO under the exposure of 420 nm. Secondly, DABPOs have been successfully used as co-initiator in H-extraction photocuring system. The results show that diallyl amino acylphosphine oxides are effective bifunctional photoinitiators for photopolymerization under LED irradiation

European Polymer Journal published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C19H18O2, Synthetic Route of 10287-53-3.

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

Zhou, Changqian published the artcileChemical composition, antibacterial activity and study of the interaction mechanisms of the main compounds present in the Alpinia galanga rhizomes essential oil, Application of Methyl 3-phenyl-2-propenoate, the publication is Industrial Crops and Products (2021), 113441, database is CAplus.

In this research, the antibacterial activity and the interaction mechanisms of the major chem. constituent present in the Alpinia galanga rhizomes essential oil (AGREO) were investigated. Et cinnamate, Me cinnamate and n-pentadecane were the major components of AGREO. The antibacterial mechanism of AGREO on Enterohemorrhagic Escherichia coli O157:H7 (EHEC O157) was evaluated and the results proved that the potent antibacterial activity of AGREO was due to higher passive permeability of bacterial cell membrane, followed by crucial intracellular components efflux. Addnl., AGREO disrupted the intracellular physiol. metabolism of EHEC O157, including inhibition of P-type ATPases activity and down-regulation expression of four virulence genes associated with EHEC infections. Notably, mol. docking studies suggested that Et cinnamate probably competed with the structural NAD(P)+ for the binding sites of glucose-6-phosphate dehydrogenase (G6PD), resulting in a decrease in G6PD activity with subsequent suppression of respiratory metabolism The spectroscopic techniques and mol. docking studies proved that the AGREO major components were prone to bind to the minor groove of DNA.

Industrial Crops and Products published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is 0, Application of Methyl 3-phenyl-2-propenoate.

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

Li, Xiao-Gen published the artcileHydrogenation of Esters by Manganese Catalysts, Quality Control of 103-26-4, the publication is Advanced Synthesis & Catalysis (2022), 364(4), 744-749, database is CAplus.

The hydrogenation of esters catalyzed by a manganese complex of phosphine-aminopyridine ligand was developed. Using this protocol, a variety of (hetero)aromatic and aliphatic carboxylates including biomass-derived esters and lactones were hydrogenated to primary alcs. R¹CH₂OH [R¹ = Me, Ph, 2-furyl, etc.] with 63-98% yields. The manganese catalyst was found to be active for the hydrogenation of Me benzoate, providing benzyl alc. with turnover numbers (TON) as high as 45,000. Investigation of catalyst intermediates indicated that the amido manganese complex was the active catalyst species for the reaction.

Advanced Synthesis & Catalysis published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Quality Control of 103-26-4.

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

Li, Huai-Ming published the artcileAn Iodine-Functionalized Metal-Organic framework for catalytic alkene bromination, Quality Control of 103-26-4, the publication is Inorganic Chemistry Communications (2022), 109529, database is CAplus.

An iodine-functionalized metal-organic framework (MOF), UiO-68-I, was synthesized. UiO-68-I showed good catalytic activity for dibromination of alkenes and alkynes with a low catalyst loading of 1% and was able to be recycled and recovered efficiently. Mechanistic studies suggest that UiO-68-I may trigger the formation of mol. bromine through a radical intermediate and thus accelerate the reaction. The activity and stability of UiO-68-I outperforms most earlier reports on organoiodine catalysts, showing the great potential of iodine-functionalized MOFs as recyclable heterogeneous hypervalent iodine reagents or catalysts.

Inorganic Chemistry Communications published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Quality Control of 103-26-4.

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

Zhang, Xiaohua published the artcileSystematically Controlling Acceptor Fluorination Optimizes Hierarchical Morphology, Vertical Phase Separation, and Efficiency in Non-Fullerene Organic Solar Cells, Name: Dimethyl itaconate, the publication is Advanced Energy Materials (2022), 12(1), 2102172, database is CAplus.

Non-fullerene acceptor (NFA) end group (EG) functionalization, especially by fluorination, affects not only the energetics but also the morphol. of bulk-heterojunction (BHJ) organic solar cell (OSC) active layers, thereby influencing the power conversion efficiency (PCE) and other metrics of NFA-based OSCs. However, a quant. understanding of how varying the degrees of NFA fluorination influence the blend morphol. and photovoltaic properties remains elusive. Here a series of three A-DAD-A type NFAs (D = π-donor group and A = π-acceptor EG) which systematically increase the degree of EG fluorination and comprehensively investigate the resulting blends with the polymer donor PM6 in terms of optical properties, electronic structure, film crystallinity, charge carrier transport, and OSC performance is reported. The results indicate that the most highly fluorinated NFA, BT-BO-L4F, achieves an optimal BHJ hierarchical morphol. where enhanced NFA mol. intermol. π-π stacking and optimal vertical phase gradation are achieved in the BHJ blend. These factors also promote optimum NFA-cathode contact, more balanced electron and hole mobility, and suppress both monomol. and bimol. recombination. As a result, both the short-circuit c.d. and fill factor in this OSC series progressively increase with increasing EG fluorine d., and the resulting PCEs increase from 9 to 16.8%.

Advanced Energy Materials published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C7H8BFO2, Name: Dimethyl itaconate.

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

Gao, Yu published the artcileOrganic glass with superior optical properties based on dimethyl itaconate and diethyl itaconate, Quality Control of 617-52-7, the publication is Polymer Testing (2021), 107363, database is CAplus.

High light transmittance material was synthesized by di-Me itaconic acid and di-Et itaconic acid via piecewise bulk polymerization, using benzoyl peroxide (BPO) as catalyst. Its chem. structure was characterized by gel permeation chromatog. (GPC), NMR spectroscopy (NMR) and fourier transform IR spectroscopy (FTIR). The thermal performance of polymer was characterized by differential scanning calorimetry (DSC) and thermogravimetric anal. (TGA), showing its glass transition temperature (T_g) was between 52° and 72°, thermal decomposition temperature above 230°, suitable for processing. The transmittance of the polymer is as high as 92% and d. of 1.1 g/cm³, which has the optical device application potential. The authors also tested the hydrophilicity of the material surface by the contact angle test, combined with the data of simulated calculation to explore the influence factors of hydrophilic change on the material surface.

Polymer Testing published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C7H10O4, Quality Control of 617-52-7.

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

Wang, Yixuan published the artcileWidely targeted metabolomics analysis of enriched secondary metabolites and determination of their corresponding antioxidant activities in Elaeagnus angustifolia var. orientalis (L.)Kuntze fruit juice enhanced by Bifidobacterium animalis subsp. Lactis HN-3 fermentation, Recommanded Product: Methyl 3-phenyl-2-propenoate, the publication is Food Chemistry (2022), 131568, database is CAplus and MEDLINE.

Elaeagnus angustifolia var. orientalis (L.)Kuntze fruit contains a large number of naturally occurring mols. present as glycoside, methylated, and Me ester conjugates, which should be hydolyzed or transformed to become bioactive forms. For this purpose, Bifidobacterium animalis subsp. lactis HN-3 was selected to ferment Elaeagnus angustifolia var. orientalis (L.)Kuntze fruit juice (EOJ). After fermentation, the total phenolic content (TPC) and antioxidant capacity of the EOJ increased significantly compared to the non-fermented EOJ. Using widely-targeted metabolomics anal., polyphenolic compounds involved in the flavonoid biosynthetic pathway were determined to be up-regulated in the fermented EOJ. In addition, the metabolites generated by 8 deglycosidation, 5 demethylation, 5 hydrogenation, and 28 other reactions were detected in higher concentrations in the fermented EOJ compared to the non-fermented EOJ. Interestingly, these up-regulated metabolites have higher antioxidant and other biol. activities than their metabolic precursors, which provide a theor. basis for the development of Bifidobacterium-fermented plant products with stronger functional activities.

Food Chemistry published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C9H21NO3, Recommanded Product: Methyl 3-phenyl-2-propenoate.

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

Sun, Maolin published the artcilePractical and rapid construction of 2-pyridyl ketone library in continuous flow, Application In Synthesis of 627-93-0, the publication is Journal of Flow Chemistry (2021), 11(2), 91-98, database is CAplus.

Herein, a practical method for the rapid synthesis of 2-pyridyl ketone ArC(O)R [Ar = 2-pyridyl; R = Me, Ph, Bn, etc.] library in continuous flow was reported, in which the 2-lithiopyridine formed by Br/Li exchange reacts with com. available esters to obtain 2-pyridyl ketones ArC(O)R in a good yield at short reaction time. This protocol functions broadly on a variety of esters and had been applied to the synthesis of TGF-β type 1 receptor inhibitor LY580276 intermediate ArC(O)R [Ar = 6-methyl-2-pyridyl; R = (4-fluorophenyl)methyl] in an environmentally friendly method. It was rapid, reliable, and cost-efficient to afford diverse kinds of 2-pyridyl ketones ArC(O)R in the compound library.

Journal of Flow Chemistry 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 C17H37NO3, Application In Synthesis of 627-93-0.

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