Tag: M.W=150-200

Herold-Majumdar, Owik Matthias published the artcileRemoval of hard COD from acidic eucalyptus kraft pulp bleach plant effluent streams using oxidoreductases, Quality Control of 134-96-3, the publication is Biotechnology and Applied Biochemistry (2022), 69(2), 687-700, database is CAplus and MEDLINE.

The bleach plant of a pulp and paper (P&P) mill presents a major source of wastewater containing toxic organic matter characterized as COD (COD). Due to their high oxidizing power, oxidoreductases hold promise to be a key solution for the removal of dissolved organic material. Here, four oxidoreductases from different enzyme families were selected to treat bleach plant effluents. Haloperoxidase treatment of the final effluent resulted in the highest levels of decolorization (71%) and reduction of aromatic compounds (36%). Using single compound anal., 27 low mol. weight compounds were found to be persistent throughout the wastewater treatment process and, therefore, classified as hard COD. The tested enzymes efficiently removed several of the identified COD compounds Hence, this study suggests that the application of oxidoreductases will serve as an environmental-friendly solution for reducing waste from P&P production

Biotechnology and Applied Biochemistry 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, Quality Control of 134-96-3.

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

Huang, Chenghong published the artcileSilver-Mediated Trifluoromethoxylation of Aryl Stannanes and Arylboronic Acids, Recommanded Product: (3-(Methoxycarbonyl)-5-methylphenyl)boronic acid, the publication is Journal of the American Chemical Society (2011), 133(34), 13308-13310, database is CAplus and MEDLINE.

A silver-mediated cross-coupling of trifluoromethoxide with aryl stannanes and arylboronic acids to give aryl trifluoromethyl ethers, e.g., I, is reported. This is the first report of a transition-metal-mediated C_aryl-OCF₃ bond formation.

Journal of the American Chemical Society published new progress about 929626-18-6. 929626-18-6 belongs to ethers-buliding-blocks, auxiliary class Boronic acid and ester,Benzene,Ester,Boronic Acids,Boronic Acids,Boronic acid and ester, name is (3-(Methoxycarbonyl)-5-methylphenyl)boronic acid, and the molecular formula is C9H11BO4, Recommanded Product: (3-(Methoxycarbonyl)-5-methylphenyl)boronic acid.

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

Amandi, Rodrigo published the artcileFriedel-Crafts Alkylation of Anisole in Supercritical Carbon Dioxide: A Comparative Study of Catalysts, Recommanded Product: 2-Isopropylanisole, the publication is Organic Process Research & Development (2005), 9(4), 451-456, database is CAplus.

The Friedel-Crafts alkylation of anisole with n-propanol was carried out over five different Bronsted solid acid catalysts using supercritical carbon dioxide as the reaction medium. The reaction temperature and pressure were evaluated in terms of selectivity for the monoalkylated products, conversion of the starting material, and the products’ isomeric ratio. Desulfonation of the catalysts was observed when the temperature was increased above 150 °C for the organic supported catalysts investigated Amberlyst 15 and Purolite CT-175, and above 200 to 250 °C for the inorganic supported catalysts Nafion SAC-13 and Deloxan ASP I/7. A decrease in the catalytic performance of organic supported catalysts was observed with increasing pressure. This decrease was related to the phase behavior of the reaction.

Organic Process Research & Development 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

Liu, Chao published the artcileLignin-first biorefinery of corn stalk via zirconium(IV) chloride/sodium hydroxide-catalyzed aerobic oxidation to produce phenolic carbonyls, Category: ethers-buliding-blocks, the publication is Bioresource Technology (2022), 127183, database is CAplus and MEDLINE.

Lignin-first biorefinery of corn stalk via ZrCl₄/NaOH-catalyzed aerobic oxidation for phenolic carbonyls production was reported. Under the co-catalysis of ZrCl₄ and NaOH, lignin in corn stalk was oxidized into phenolic aldehydes (p-hydroxybenzaldehyde, vanillin, and syringaldehyde), ketones (p-hydroxyacetophenone, acetovanillone, and acetosyringone), acids (p-hydroxybenzoic acid and vanillic acid), and other derivatives Reaction conditions, including time, temperature, ZrCl₄ dosage, NaOH dosage, MeCN/H₂O ratio, and initial O₂ pressure were comprehensively screened, and the optimal lignin-derived monomer yields of 13.2 weight% was obtained. Among these aromatic compounds, phenolic aldehydes were the main products, and the overall selectivity of phenolic carbonyls was as high as 93%. Cellulose-rich residues after lignin-first oxidation were further characterized by thermogravimetry and anal. pyrolysis with corn stalk as the control, proving the good fragmentation and dissolution of lignin streams. In general, ZrCl₄/NaOH-catalyzed lignin-first oxidation provided a novel approach for lignin valorization, and achieved the highest reported phenolic carbonyls selectivity.

Bioresource Technology 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

Yuan, Shuqing published the artcileChromium-Catalyzed Reductive Cleavage of Unactivated Aromatic and Benzylic C-O Bonds, Related Products of ethers-buliding-blocks, the publication is Synthesis (2021), 53(18), 3343-3350, database is CAplus.

Reductive cleavage of aromatic and benzylic C-O bonds by chromium catalysis was reported. This deoxygenative reaction was promoted by low-cost CrCl₂ precatalyst combined with poly(Me hydrogen siloxane) as the mild reducing agent, providing a strategy in forming reduced motifs by cleavage of unactivated C-O bonds. A range of functional groups such as bromide, chloride, fluoride, hydroxyl, amino and alkoxycarbonyl was retained in the reduction

Synthesis 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 C12H20O6, Related Products of ethers-buliding-blocks.

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

Wu, Ke published the artcileNi-catalyzed reductive decyanation of nitriles with ethanol as the reductant, COA of Formula: C11H10O, the publication is Chemical Communications (Cambridge, United Kingdom) (2021), 57(18), 2273-2276, database is CAplus and MEDLINE.

A nickel-catalyzed reductive decyanation of aromatic nitriles has been developed, in which the readily available and abundant ethanol was applied as the hydride donor. Various functional groups on the aromatic rings, such as alkoxyl, amino, imino and amide, were compatible in this catalytic protocol. Heteroaryl, benzylic and alkenyl nitriles were also tolerated. Mechanistic investigation indicated that ethanol provided hydride efficiently via β-hydride elimination in this reductive decyanation.

Chemical Communications (Cambridge, United Kingdom) 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 C8H15ClN2, COA of Formula: C11H10O.

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

Thao, Nguyen Phuong published the artcileCytotoxic metabolites from the leaves of the mangrove Rhizophora apiculata, Category: ethers-buliding-blocks, the publication is Phytochemistry Letters (2022), 51-55, database is CAplus.

One new 8,4-oxyneolignan (1) and one new 7,8-dihydrobenzofuranone (2), together with twenty-one known compounds (3-23) were isolated from the methanol extract of Rhizophora apiculata leaves. The structures of new compounds, as well as their absolute configuration, were determined by a combination of spectroscopic methods and quantum chem. calculations of NMR and ECD data. All isolated compounds were evaluated for their cytotoxicity, and only 2,6-dimethoxy-1,4-benzoquinone (8) exhibited inhibitory effects against SK-LU-1, HepG2, and MCF7 cells with IC50 values in the range of 8.33-14.82 μM.

Phytochemistry Letters 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 C16H12O, Category: ethers-buliding-blocks.

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

Wei, Ya-Nan published the artcileStructural changes for lignin from Chinese quince during the sequential fractionation of cell wall polysaccharides, SDS of cas: 134-96-3, the publication is Process Biochemistry (Oxford, United Kingdom) (2022), 167-176, database is CAplus.

The crosslinking between lignin and cell wall polysaccharides is one of recalcitrance to extract pectin and hemicellulose. In this work, water-, chelator-, Na₂CO₃-soluble pectin (WSP, CSP, NSP) and alkali-soluble hemicellulose (ASH) were sequentially removed, milled wood lignins (WMWL, CMWL, NMWL and KMWL) were isolated from Chinese quince. Quant. chem. anal. techniques (e.g., HPAEC, FT-IR, GPC, Py-GC/MS, TG and 2D NMR) were used for characterizing the lignin fractions. Results indicate that there are tight linkages between arabinose and lignin. The mol. weight and thermal stability decreased as different types of pectin (WSP, CSP and NSP) were removed. Py-GC/MS and 2D NMR data showed that the major interunit β-O-4′ aryl ether bonds of lignin (61.07%-72.53%) and the S/G ratios (0.56-2.68) were changed. It was revealed that Chinese quince pectin and hemicellulose polysaccharides have more covalent crosslinks with S-type lignin from secondary wall S2 than G-type lignin. These results will contribute to realizing the mechanisms of cell wall polysaccharides isolation and be beneficial for the potential application of Chinese quince fruits in food and other industries.

Process Biochemistry (Oxford, United Kingdom) 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 C10H14O, SDS of cas: 134-96-3.

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

Wei, Juan published the artcilePhenolic compositions and antioxidant activities of Hippophae tibetana and H. rhamnoides ssp. sinensis berries produced in Qinghai-Tibet Plateau, Computed Properties of 134-96-3, the publication is Food Chemistry: X (2022), 100397, database is CAplus.

Phenolic ingredients of Hippophae tibetana (Tib) and H. rhamnoides ssp. sinensis (Rha) berry from Qinghai-Tibet Plateau were identified by Ultra Performance Liquid Chromatog.-triple Quadrupole Tandem Mass Spectrometry. Results demonstrated that both of them possessed high levels of total phenolic and flavonoid, and compared to Tib, Rha berry exhibited higher contents. Moreover, flavonols was the most predominant subclass in Rha berry, flavonols and flavanols were the two most abundant subclasses in Tib berry. Among them, rutin and narcissin were present in the most abundant amounts in Rha berry, while (-)-epigallocatechin was the richest substance in Tib berry. Furthermore, both phenolic extracts of sea buckthorn berry exhibited strong in vitro and cellular antioxidant properties. Rha berry extract exhibited much stronger effects because of its higher levels of phenolic and flavonoid profiles. This finding proved that the Rha berry could serve as a food source for better health with great potential antioxidant activity.

Food Chemistry: X 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 C7H16Cl2Si, Computed Properties of 134-96-3.

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

Cao, Maoyu published the artcileSeasonal variations and potential sources of biomass burning tracers in particulate matter in Nanjing aerosols during 2017-2018, Quality Control of 134-96-3, the publication is Chemosphere (2022), 303(Part_2), 135015, database is CAplus and MEDLINE.

Biomass burning (BB) is an important source of atm. particulate matter and can adversely affect air quality, visibility, human health, and climate change. To study the characteristics and potential source regions of BB tracers in PM2.5, a liquid chromatog.-mass spectrometry instrument (HPLC-MS/MS) is applied in this study to develop and validate a method to determine organic tracers of BB in 397 aerosol samples. The total mean concentrations of 17 tracers measured in 2017 and 2018 were 333.32 ng m-3 and 243.45 ng m-3, resp. Among them, the concentration of levoglucosan was the highest among all the tracers, with 325.63 ng m-3 in 2017 and 237.47 ng m-3 in 2018. The BB tracers showed obvious seasonal variations characteristics, most of which were abundant in winter. However, the concentrations of 3,4-dimethoxyacetic acid and sinapinic acid were higher in summer and spring than that in the other seasons. There were obvious differences in the Potential Source Contribution Factor (PSCF) model results of the BB’s potential source area annually and in different seasons. The results of the potential source anal. showed that Beijing-Tianjin-Hebei had a great impact on the Nanjing air quality in 2017. Finally, five source factors for BB were identified based on the Pos. Matrix Factor (PMF) model, and these were cellulose, hardwood, softwood, grass, and secondary formed. During the 2 years, cellulose was the largest contributor to biomass burning. Owing to the different fire conditions each year, the contribution of the five factors to the BB tracers was also different. For example, the contribution of softwood to the BB tracers was greater in 2018 (8.4%) than in 2017 (5.2%), while the contributions of hardwood and cellulose did not change significantly.

Chemosphere 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, Quality Control of 134-96-3.

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