Tag: M.W=150-200

Cao, Ying published the artcileSmart anticorrosive epoxy coating based on environmental-stimuli-responsive copolymer assemblies for controlled release of corrosion inhibitors, Related Products of ethers-buliding-blocks, the publication is Macromolecular Materials and Engineering (2022), 307(7), 2100983, database is CAplus.

Inspired by the various applications of self-assembled amphiphilic polymers in aqueous solution, a novel ”semi-amphiphilic” copolymer is designed, which can self-assemble in organic systems by taking advantage of the compatibility difference between epoxy and the units with different structures in the polymer chains. A novel kind of polymer, poly(syringaldehyde methacrylate)-co-poly(dopamine methacrylate) is prepared by reversible addition-fragmentation chain transfer polymerization, which contains aldehyde groups and is further used to prepare the polymer/guanine conjugate by forming the Schiff base. The polymer/guanine conjugate is semi-amphiphilic, since the compatibility between dopamine methacrylate unit and epoxy is better than that between syringaldehyde methacrylate and epoxy, and therefore assemblies are formed in the organic system when it is added into the epoxy resin to prepare the anti-corrosive coating. The imine linkage is responsible for the pH-controlled release of the corrosion inhibitors, namely guanine, from the core of the assemblies. The self-assembled behaviors of the semi-amphiphilic copolymer in epoxy are investigated by dynamic light scattering and SEM. The stable encapsule and controlled-release of the inhibitors are confirmed by UV spectrophotometry. The properties of the smart coatings are comprehensively studied.

Macromolecular Materials and Engineering published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H10O4, Related Products of ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Fan, Ju-di published the artcileAnalysis on the chemical compounds of essential oil from Centipeda minima in Guizhou by simultaneous distillation and extraction method, Synthetic Route of 2944-47-0, the publication is Anhui Nongye Kexue (2009), 37(15), 6986-6987, 6991, database is CAplus.

The objective of this study was to explore the chem. composition of essential oil from Centipeda min. (L) A.Br.et Aschers in Guizhou and provide the basis for its further exploitation and utilization. The essential oil of C. min. was extracted by simultaneous distillation and extraction and analyzed by gas chromatog.-mass spectrometry. The relative contents of each component in the essential oil were obtained by normalization of peak areas. Results show that 55 compositions were identified which added up to96.45% in the essential oil. It was concluded that the main compositions of essential oil from C. min. were trans-chrysanthenyl acetate (62.46%) and beta-bisabolene(4.69%), thymol (3.88%),verbenol(3.03%), 1,1,5,6,6,9,9-heptamethyl-10-methylene-spiro[2.7]dec-4-ene and carvacrol(2.57%).

Anhui Nongye Kexue published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Synthetic Route of 2944-47-0.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Kaal, Joeri published the artcileFingerprinting macrophyte Blue Carbon by pyrolysis-GC-compound specific isotope analysis (Py-CSIA), Category: ethers-buliding-blocks, the publication is Science of the Total Environment (2022), 155598, database is CAplus and MEDLINE.

There is a need for tools to determine the origin of organic matter (OM) in Blue Carbon Ecosystems (BCE) and marine sediments to (1) facilitate the implementation of Blue Carbon strategies into carbon accounting and crediting schemes and (2) decipher changes in ecosystem condition over decadal to millennial time scales and thus to understand and predict the stability of BCE in a changing world. Pyrolysis-GC-compound specific isotope anal. (Py-CSIA) is applied for the first time in marine environments and BCE research. We studied Australian mangrove, tidal marsh and seagrass sediments, in addition to potential sources of OM (Avicennia, Posidonia, Zostera, Sarcocornia, Ecklonia and Ulva species and seagrass epiphytes), to identify precursors of different biomacromol. constituents (lignin, polysaccharides and aliphatic structures). Firstly, the link between bulk δ¹³C and δ¹³C reconstructed from compound-specific δ¹³C showed that the pyrolysis approach allows for the isotopic screening of a representative portion of the OM. Secondly, for all samples, the C isotope fingerprint of the carbohydrate products (plant polysaccharides) was the heaviest (¹³C enriched), followed by lignin and aliphatic products. The differences in δ¹³C among macromols. and the overlap in δ¹³C among putative sources reflect the limitations of bulk δ¹³C analyses for deciphering OM provenance. Thirdly, phanerogams specimen had the heaviest carbohydrate and lignin, confirming that seagrass-derived lignocellulose can be traced based on δ13C. Consistent differences for individual compounds were identified between seagrasses and between Avicennia and Sarcocornia using Py-CSIA. Fourth, ecosystem shifts (colonization of seagrass habitats by mangrove) on millenary time scales, hypothesized in previous studies on the basis of bulk δ13C and Py-GC-MS, were confirmed by Py-CSIA. We conclude that Py-CSIA is useful in Blue Carbon research to decipher OM sources in marine sediments, identify ecosystem transitions in palaeoenvironmental records, and to understand the role of different OM compounds in Blue Carbon storage.

Science of the Total Environment published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H10O4, Category: ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Deolka, Shubham published the artcilePhotoinduced Trifluoromethylation of Arenes and Heteroarenes Catalyzed by High-Valent Nickel Complexes, SDS of cas: 93-04-9, the publication is Angewandte Chemie, International Edition (2021), 60(46), 24620-24629, database is CAplus and MEDLINE.

Authors describe a series of air-stable Ni^III complexes supported by a simple, robust naphthyridine-based ligand. Access to the high-valent oxidation state is enabled by the CF₃ ligands on the nickel, while the naphthyridine exhibits either a monodentate or bidentate coordination mode that depends on the oxidation state and sterics, and enables facile aerobic oxidation of NiII to NiIII. These Ni^III complexes act as efficient catalysts for photoinduced C(sp²)-H bond trifluoromethylation reactions of (hetero)arenes using versatile synthetic protocols. This blue LED light-mediated catalytic protocol proceeds via a radical pathway and demonstrates potential in the late-stage functionalization of drug analogs.

Angewandte Chemie, International Edition published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C11H10O, SDS of cas: 93-04-9.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Barcelo, Gerard published the artcilePentaalkylguanidines as etherification and esterification catalysts, Formula: C10H14O, the publication is Tetrahedron (1990), 46(6), 1839-48, database is CAplus.

Several pentaalkylguanidines were prepared and found to be superior catalysts for the preparation of aryl and aralkyl ethers from carbonates and for the methylation of phenols with Me₂CO₃. They also act as effective catalysts for esterification of acids with alkyl chloroformates but not for the acetylation of tertiary alcs. with Ac₂O.

Tetrahedron published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Formula: C10H14O.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Pietrasiak, Ewa published the artcileCobalt-Catalyzed Formation of Grignard Reagents via C-O or C-S Bond Activation, Application In Synthesis of 93-04-9, the publication is Journal of Organic Chemistry (2022), 87(13), 8380-8389, database is CAplus and MEDLINE.

C(aryl)-OMe bond functionalization catalyzed by Co(II) chloride in combination with a nacnac-type ligand and Mg as a reductant is reported. Borylation and benzoylation of aryl methoxides are demonstrated, and C(aryl)-SMe bond borylation can be achieved under similar conditions. This is the 1st example of achieving these transformations using Co catalysis. Mechanistic studies suggest that a Grignard reagent is generated as an intermediate in a rare example of a magnesiation via a C-O bond activation reaction. Indeed, an organomagnesium species could be directly observed by electrospray ionization mass spectroscopic anal. Kinetic experiments indicate that a heterogeneous Co catalyst performs the C-O bond activation.

Journal of Organic Chemistry published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C11H10O, Application In Synthesis of 93-04-9.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Brieger, Gottfried published the artcileConvenient O-alkylation of phenols, Recommanded Product: 2-Isopropylanisole, the publication is Journal of Chemical and Engineering Data (1968), 13(4), 581-2, database is CAplus.

The preparation of several aryl-methyl ethers by refluxing excess MeI with the corresponding phenols is described. HCONMe2 was the solvent used, and anhydrous K2CO3 was the base. Yields for several phenols are given.

Journal of Chemical and Engineering Data published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Recommanded Product: 2-Isopropylanisole.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Babatunde, Oluwatoyin published the artcileDihydroquinazolin-4(1H)-one derivatives as novel and potential leads for diabetic management, Application In Synthesis of 134-96-3, the publication is Molecular Diversity (2022), 26(2), 849-868, database is CAplus and MEDLINE.

A variety of dihydroquinazolin-4(1H)-one derivatives (1-37) were synthesized via “one-pot” three-component reaction scheme by treating aniline and different aromatic aldehydes with isatoic anhydride in the presence of acetic acid. Chem. structures of compounds were deduced by different spectroscopic techniques including EI-MS, HREI-MS, 1H-, and 13C-NMR. Compounds were subjected to α-amylase and α-glucosidase inhibitory activities. A number of derivatives exhibited significant to moderate inhibition potential against α-amylase (IC₅₀ = 23.33 ± 0.02-88.65 ± 0.23 μM) and α -glucosidase (IC₅₀ = 25.01 ± 0.12-89.99 ± 0.09 μM) enzymes, resp. Results were compared with the standard acarbose (IC₅₀ = 17.08 ± 0.07 μM for α-amylase and IC₅₀ = 17.67 ± 0.09 μM for α -glucosidase). Structure-activity relationship (SAR) was rationalized by analyzing the substituents effects on inhibitory potential. Kinetic studies were implemented to find the mode of inhibition by compounds which revealed competitive inhibition for α-amylase and non-competitive inhibition for α-glucosidase. However, in silico study identified several important binding interactions of ligands (synthetic analogs) with the active site of both enzymes.

Molecular Diversity published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H10O4, Application In Synthesis of 134-96-3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Guo, Xingjie published the artcileSelective hydrogenation of vanillin to vanillyl alcohol over Pd, Pt, and Au catalysts supported on an advanced nitrogen-containing carbon material produced from food waste, Synthetic Route of 134-96-3, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2022), 135885, database is CAplus.

Food waste worldwide has been threatening the environment and resulting in high carbon emissions. Although anaerobic fermentation is a potential solution transforming food waste into valuable chems., a large amount of the fermentation residue remains as solid waste. For closing the circular economy loop for food waste valorization, we proposed a thermo-chem. activation of a fermentation residue produced from a mixture of food waste and sludge to prepare a nitrogen-enriched, advanced carbon material. This could be used as a support to synthesize Pd/C, Pt/C and Au/C catalysts for the aqueous-phase hydrogenation of vanillin to vanillyl alc. at mild reaction conditions. The produced alc. increased sixfold the com. value of the original aldehyde. The catalytic performance (based on the vanillin conversion and vanillyl alc. yield) followed the order of Pd/C > Pt/C > Au/C. The Pd/C catalyst showed an excellent catalytic activity (>99% vanillin conversion and > 99% vanillyl alc. selectivity) at optimized reaction conditions (i.e., 30°C and 0.7 MPa H₂ for 90 min, with 2 mmol vanillin/10 mg catalyst), along with high reusability and stability (up to four consecutive runs). These catalytic features outperformed those of a com. Pd/C catalyst owing to: (i) high reduction degree and stabilization of the Pd particles on the carbon support, which accommodated a higher proportion of pyridinic than pyrrolic nitrogen, and (ii) rapid adsorption of the aldehyde group on the catalyst combined with rapid desorption of the newly formed hydroxymethyl group. This exceptional catalytic behavior was corroborated by efficient hydrogenation of other lignin-derived aromatic aldehydes, including p-hydroxybenzaldehyde and syringaldehyde, to their resp. alcs. Our results can bring a novel use for food waste in catalysis and represent a sustainable and efficient conversion of biomass into value-added chems. and advanced materials.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H10O4, Synthetic Route of 134-96-3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Mueller, Valentin published the artcileC-F Activation for C(sp²)-C(sp³) Cross-Coupling by a Secondary Phosphine Oxide (SPO)-Nickel Complex, Quality Control of 93-04-9, the publication is Organic Letters (2020), 22(17), 7034-7040, database is CAplus and MEDLINE.

A secondary phosphine oxide (SPO)-nickel catalyst allowed the activation of otherwise inert C-F bonds of unactivated arenes in terms of challenging couplings with primary and secondary alkyl Grignard reagents. The C-F activation is characterized by mild reaction conditions and high levels of branched selectivity. Electron-rich and electron-deficient arenes were suitable electrophiles for this transformation. In addition, this strategy also proved suitable to heterocycles and for the activation of C-O bonds under slightly modified conditions.

Organic Letters published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C11H10O, Quality Control of 93-04-9.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem