Tag: M.W=150-200

Rivero-Crespo, Miguel A. published the artcilePreparation of Recyclable and Versatile Porous Poly(aryl thioether)s by Reversible Pd-Catalyzed C-S/C-S Metathesis, Computed Properties of 93-04-9, the publication is Journal of the American Chemical Society (2021), 143(50), 21331-21339, database is CAplus and MEDLINE.

Porous organic materials (polymers and COFs) have shown a number of promising properties; however, the lability of their linkages often limits their robustness and can hamper downstream industrial application. Inspired by the outstanding chem., mech. and thermal resistance of the 1D polymer polyphenylene sulfide (PPS), we have designed a new family of porous poly arylthioethers, synthesized via a mild Pd-catalyzed C-S/C-S metathesis-based method, that merges the attractive features common to porous polymers and PPS in a single material. In addition, the method is highly modular, allowing to easily introduce application-oriented functionalities in the materials for a series of environmentally relevant applications including metal capture, metal sensing and heterogeneous catalysis. Moreover, despite their extreme chem. resistance, the polymers can be easily recycled to recover the original monomers, offering an attractive perspective for their sustainable use. In a broader context, these results clearly demonstrate the untapped potential of emerging single-bond metathesis reactions in the preparation of new, recyclable materials.

Journal of the American Chemical Society 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, Computed Properties of 93-04-9.

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

Murphy, Jaclyn M. published the artcileOne-Pot Synthesis of Arylboronic Acids and Aryl Trifluoroborates by Ir-Catalyzed Borylation of Arenes, Application In Synthesis of 929626-18-6, the publication is Organic Letters (2007), 9(5), 757-760, database is CAplus and MEDLINE.

The synthesis of arylboronic acids and aryl trifluoroborates in a one-pot sequence by Ir-catalyzed borylation of arenes is reported. To prepare the arylboronic acids, the Ir-catalyzed borylation is followed by oxidative cleavage of the boronic ester with NaIO₄ and to prepare the aryltrifluoroborate, the Ir-catalyzed borylation is followed by displacement of pinacol by KHF₂. These two-step sequences give products that are more reactive toward subsequent chem. than the initially formed pinacol boronates.

Organic Letters 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, Application In Synthesis of 929626-18-6.

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

Arai, Kenta published the artcileIntermolecular chemo- and regioselective aromatic C-H amination of alkoxyarenes promoted by rhodium nitrenoids, Formula: C10H14O, the publication is Chemical Communications (Cambridge, United Kingdom) (2018), 54(18), 2264-2267, database is CAplus and MEDLINE.

Intermol. aromatic C(sp²)-H amination promoted by neutral rhodium nitrenoids has been developed. The reactions proceeded with various oxygen-substituted arenes ROR¹ (R = Me, Et, Bn, etc.; R¹ = Ph, 2-fluorophenyl, 2-benzylphenyl, etc.) (1.5 equivalent) in a chemo- and regioselective manner. The aromatic C(sp²)-H amination took place at the para position of the oxygen substituent in the presence of benzylic C(sp³)-H bonds and/or C(sp³)-H bonds α to ethereal oxygen.

Chemical Communications (Cambridge, United Kingdom) 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

Shishido, Ryosuke published the artcileGeneral Synthesis of Trialkyl- and Dialkylarylsilylboranes: Versatile Silicon Nucleophiles in Organic Synthesis, Category: ethers-buliding-blocks, the publication is Journal of the American Chemical Society (2020), 142(33), 14125-14133, database is CAplus and MEDLINE.

Silylboranes R₃SiBpin were prepared by transition metal-catalyzed borylation of hydrosilanes R₃SiH with pinB-Bpin; versatility of silicon nucleophiles thus obtained is explored in coupling and conjugate addition reactions. Compared to carbon-based nucleophiles, the number of silicon-based nucleophiles that is currently available remains limited, which significantly hampers the structural diversity of synthetically accessible silicon-based mols. Given the high synthetic utility and ease of handling of carbon-based boron nucleophiles, silicon-based boron nucleophiles, i.e., silylboranes, have received considerable interest in recent years as nucleophilic silylation reagents that are activated by transition-metal catalysts or bases. However, the range of practically accessible silylboranes remains limited. In particular, the preparation of sterically hindered and functionalized silylboranes remains a significant challenge. Here, we report the use of rhodium and platinum catalysts for the direct borylation of hydrosilanes with bis(pinacolato)diboron, which allows the synthesis of new trialkylsilylboranes that bear bulky alkyl groups and functional groups as well as new dialkylarylsilylboranes that are difficult to synthesize via conventional methods using alkali metals. We further demonstrate that these compounds can be used as silicon nucleophiles in organic transformations, which significantly expands the scope of synthetically accessible organosilicon compounds compared to previously reported methods. Thus, the present study can be expected to inspire the development of efficient methods for novel silicon-containing bioactive mols. and organic materials with desirable properties. We also report the first ¹¹B{¹H} and ²⁹Si{¹H} NMR spectroscopic evidence for the formation of ⁱPr₃SiLi generated by the reaction of ⁱPr₃Si-B(pin) with MeLi.

Journal of the American Chemical Society 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 C16H14O6, Category: ethers-buliding-blocks.

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

Shanmugapriya, Ramasamy published the artcileMetal-chloroglynate ionic liquids: Catalytic application for friedel-crafts [F-C] reactions, HPLC of Formula: 93-04-9, the publication is Journal of the Indian Chemical Society (2021), 98(6), 100081, database is CAplus.

Various metal-containing ionic liquids were used as catalysts for Friedel-Crafts reactions. The reaction of R-X with benzene in the presence of M-IL (M = Fe, Zn, Cd, Cu) along with 1-glycyl-3-methylimidazolium chloride ([Gmim] Cl) ionic liquid, leads to the development of several key intermediates. Among them, metal-iron showed higher catalytic activity without organic solvents. This technique features high yield, a simple product isolation, ILs reusability and reduced waste discharge, thus rendering this catalytic system both effective and natural friendly.

Journal of the Indian Chemical Society 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 C10H14O, HPLC of Formula: 93-04-9.

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

Mino, Takashi published the artcilePalladium-catalyzed asymmetric allylic alkylation using (R)-2-(methoxymethyl)pyrrolidine-derived aminophosphine ligands, Application of 2-Isopropylanisole, the publication is Tetrahedron: Asymmetry (2001), 12(17), 2435-2440, database is CAplus.

Palladium-catalyzed asym. allylic alkylation of 1,3-diphenyl-2-propenyl acetate using a di-Me malonate-BSA-LiOAc system has been successfully carried out in the presence of new chiral aminophosphine ligands in good yields with good enantioselectivities (up to 96% e.e.).

Tetrahedron: Asymmetry 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, Application of 2-Isopropylanisole.

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

Saini, Bhavna published the artcileNickel nano-particles confined in ZSM-5 framework as an efficient catalyst for selective hydrodeoxygenation of lignin-derived monomers, Category: ethers-buliding-blocks, the publication is Biomass and Bioenergy (2022), 106350, database is CAplus.

The present study offers an efficient, economical, non-noble metal based catalytic process for the selective HDO of lignin-derived compounds HDO of major lignin constituting monomers like vanillin, syringaldehyde, guaiacol, and cresol were studied over Ni(2.5)@ZSM-5 catalysts. Complete conversion of vanillin and syringaldehyde was achieved with >99% selectivity towards creosol and 4-methylsyringol resp., while the reactions with guaiacol and cresol did not show any conversion. The catalyst is highly selective towards the conversion of the aldehydic group to Me group. Potential of the catalyst to be used at more realistic conditions was ascertained by evaluating the catalyst with simulated feed prepared by mixing lignin monomers and impurities like S, Na, and K. The catalyst showed excellent results with simulated feed similar to the pure model compounds Various characterization techniques like XRD, FTIR, NH3-TPD, H₂-TPR, UV-DRS, TEM, TGA, etc. were employed to understand the physico-chem. properties of the catalytic material. The nature and location of Ni species in the catalyst were determined as well as the most plausible active center for the HDO reaction was identified. The study revealed that active metal and acid site in close proximity exhibits a synergistic effect which leads to superior catalytic activity. Effect of support acidity was studied in more detail by evaluating the catalysts with variable acidity. The meritorious properties of the catalyst like exceptionally high selectivity, good stability, tolerance for impurities, excellent recyclability as well as economical catalyst formulation make it suitable to be used for the processing of real feeds at realistic conditions.

Biomass and Bioenergy 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

Thoa, Le Thi Kim published the artcileBiodegradation and Detoxification of Malachite Green Dye by Extracellular Laccase Expressed from Fusarium oxysporum, Application In Synthesis of 134-96-3, the publication is Waste and Biomass Valorization (2022), 13(5), 2511-2518, database is CAplus.

The present study evaluated the potential of biodegrading the toxic synthetic dye malachite green (MG) by an enzymic approach. Extracellular laccase derived a fungal strain Fusarium oxysporum HUIB02 was used in the direct biodegradation of MG. Time-course study showed that the crude laccase successfully removed ≥ 80% MG after 20 h of treatment. The presence of Cu²⁺ ions enhanced MG degradation, while cation Fe²⁺ and anions including Cl^– and I^– reduced the degradation efficiency. The optimal temperature was 40°C. Supplementation of mediators including syringaldehyde (SA), 1-hydroxybenzotriazole (HBT), and vanillin (VA) improved the MG degradation up to 99%. Under the optimal reaction conditions, the MG degradation efficiency of laccase reached ≥ 90% when MG concentration was ≤ 100 mg/L. At a higher concentration (1000 mg/L of MG), the enzyme still removed 88.1% the present dye. The detoxification evaluation confirmed the nullification of MG toxicity on microorganism after the enzymic treatment. Hence, this enzymic degradation approach is promising for the treatment of effluents containing MG.

Waste and Biomass Valorization 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 C7H5ClN2S, Application In Synthesis of 134-96-3.

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

Cuprys, Agnieszka published the artcilePotential of agro-industrial produced laccase to remove ciprofloxacin, Synthetic Route of 134-96-3, the publication is Environmental Science and Pollution Research (2022), 29(7), 10112-10121, database is CAplus and MEDLINE.

Ciprofloxacin (CIP), a widely used antibiotic, is frequently detected in the environment due to insufficient wastewater and water treatment. Hence, novel, green and cost-effective technologies are required to enhance the removal of these pollutants. The potency of crude enzymes, especially laccases, produced by white-rot fungi was tested to assess their effectiveness to degrade CIP from water. Crude laccase alone could not oxidize CIP. The addition of syringaldehyde, a redox mediator, resulted in a decrease in antibiotic concentration up to 68.09±0.12% in 24 h, which was the highest removal efficiency achieved with 0.15 mg/mL syringaldehyde and 2 mg/mL of crude laccase (0.1 U/mL). Crude laccase oxidation of CIP was inhibited after 6 h of treatment. To compare, a pure enzyme with the same activity as the crude one removed 86% of CIP in 24 h. No inhibitory effect during the treatment was observed The estimation of antimicrobial efficiency revealed that after 6 h of treatment, the toxicity towards Escherichia coli decreased by 30%. The wastewater treatment by the crude laccase-mediated system was estimated to significantly reduce the cost of enzymic treatment.

Environmental Science and Pollution Research 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

Su, Boqing published the artcileAnalysis of the chemical components of pomelo peels (Citrus grandis [L.] Osbeck) from different cultivars by using supercritical CO₂ fluid extraction and ultra-high-performance liquid chromatography-tandem mass spectrometry, Application of 4-Hydroxy-3,5-dimethoxybenzaldehyde, the publication is Journal of Separation Science (2022), 45(15), 3031-3042, database is CAplus and MEDLINE.

Five pomelo cultivars (i.e., Citrus grandis cv. Shatianyou, Citrus grandis cv. Guanximiyou, Citrus grandis cv. Yuhuanyou, Citrus grandis cv. Duweiwendanyou and Citrus grandis cv. Liangpingyou) from different origins in China were selected to analyze their components by using supercritical CO₂ fluid extraction coupled with ultra-high-performance liquid chromatog.-tandem mass spectrometry. A total of 45 compounds were identified in the supercritical CO₂ fluid extracts of the pomelo peels from the five cultivars. These compounds included eight flavonoids, 18 coumarins, four organic acids, three aldehydes, and 12 other compounds, which were identified using the obtained MS data and by comparison with com. standards, orbitrap Chinese Traditional Medicine Library, and previous literature. Twenty-five of the identified compounds were detected for the first time in the pomelo peel extracts Results suggested that the pomelo peels of C. grandis cv. Shatianyou contained the most natural chem. compositions The pooled result may offer scientific evidence for further development and utilization of pomelo peels and a route for screening appropriate varieties for various demands.

Journal of Separation Science 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 C19H28BNO4, Application of 4-Hydroxy-3,5-dimethoxybenzaldehyde.

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