Tag: M.W=300-350

Tamoradi, Taiebeh published the artcileLa complex supported on magnetic nanoparticles: green, efficient, novel and reusable nanocatalyst for the synthesis of 5-substituted tetrazoles and the oxidation reactions in neat condition, Application of 2,2′-Dithiodibenzoic acid, the publication is Journal of the Iranian Chemical Society (2019), 16(8), 1723-1733, database is CAplus.

In the present work, we were interested in the synthesis of green and novel magnetic nanocatalyst by anchoring La complex on Fe₃O₄. The nanocatalyst was successfully synthesized and characterized by FT-IR, SEM, TGA, XRD, EDX, and ICP techniques. The designed procedure shows many benefits such as short reaction time, high yield, excellent purity, eco-friendly catalyst, easy workup and easy recovery from the reaction mixture by external magnet.

Journal of the Iranian Chemical Society published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C15H12O6, Application of 2,2′-Dithiodibenzoic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Szpera, Robert published the artcileSynthesis of Fluorinated Alkyl Aryl Ethers by Palladium-Catalyzed C-O Cross-Coupling, Computed Properties of 17351-62-1, the publication is Organic Letters (2020), 22(16), 6573-6577, database is CAplus and MEDLINE.

Herein, we report a highly effective protocol for the cross-coupling of (hetero)aryl bromides with fluorinated alcs. using the com. available precatalyst ^tBuBrettPhos Pd G3 and Cs₂CO₃ in toluene. This Pd-catalyzed coupling features a short reaction time, excellent functional group tolerance, and compatibility with electron-rich and -poor (hetero)arenes. The method provides access to ¹⁸F-labeled trifluoroethyl ethers by cross-coupling with [¹⁸F]trifluoroethanol. Safety: 2-fluoroethanol is highly toxic.

Organic Letters published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C12H9NO, Computed Properties of 17351-62-1.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Akai, Shuji published the artcileSynthesis of Long-Chain [¹⁸F]Deoxyfluoropoly(ethylene glycol) Methyl Ethers and Their Noninvasive Pharmacokinetic Analysis by Positron Emission Tomography, COA of Formula: C17H37NO3, the publication is Molecular Pharmaceutics (2011), 8(1), 302-308, database is CAplus and MEDLINE.

[¹⁸F]DeoxyfluoroPEG Me ethers with an average mol. weight of 2 kDa and 10 kDa were synthesized by the fluorination of the tosylates with [¹⁸F]nBu₄NF at 80 ¡ãC for 20 min followed by flash filtration through a Sep-Pak Plus Alumina-N cartridge. After the i.v. administration to rats, their pharmacokinetics was analyzed by noninvasive, real-time, whole-living-body monitoring using positron imaging technol. The effect of PEG’s mol. weight on their blood circulation and organ clearance were quant. visualized for the first time.

Molecular Pharmaceutics published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C17H37NO3, COA of Formula: C17H37NO3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Flegler, Alexander published the artcileExogenous fatty acids affect membrane properties and cold adaptation of Listeria monocytogenes, Product Details of C22H32O2, the publication is Scientific Reports (2022), 12(1), 1499, database is CAplus and MEDLINE.

Listeria monocytogenes is a food-borne pathogen that can grow at very low temperatures close to the f.p. of food and other matrixes. Maintaining cytoplasmic membrane fluidity by changing its lipid composition is indispensable for growth at low temperatures Its dominant adaptation is to shorten the fatty acid chain length and, in some strains, increase in addition the menaquinone content. To date, incorporation of exogenous fatty acid was not reported for Listeria monocytogenes. In this study, the membrane fluidity grown under low-temperature conditions was affected by exogenous fatty acids incorporated into the membrane phospholipids of the bacterium. Listeria monocytogenes incorporated exogenous fatty acids due to their availability irresp. of their m.ps. Incorporation was demonstrated by supplementation of the growth medium with polysorbate 60, polysorbate 80, and food lipid extracts, resulting in a corresponding modification of the membrane fatty acid profile. Incorporated exogenous fatty acids had a clear impact on the fitness of the Listeria monocytogenes strains, which was demonstrated by analyses of the membrane fluidity, resistance to freeze-thaw stress, and growth rates. The fatty acid content of the growth medium or the food matrix affects the membrane fluidity and thus proliferation and persistence of Listeria monocytogenes in food under low-temperature conditions.

Scientific Reports published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C22H32O2, Product Details of C22H32O2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ciurescu, Georgeta published the artcileMeat quality in broiler chickens fed on cowpea (Vigna unguiculata [L.] Walp) seeds, Safety of Docosahexaenoic Acid, the publication is Scientific Reports (2022), 12(1), 9685, database is CAplus and MEDLINE.

The study aimed to evaluate the effects of a diet containing untreated cowpea (CWP; Aura 26 variety) seeds as a protein source on quality parameters of chickens breast (PM; Pectoralis major) and thigh muscles (BF; Biceps femoris). A total of 240 Ross 308 broiler chickens were randomly allotted to two groups: a control group fed with soybean meal (SBM) and an exptl. group fed with CWP included at 200 g/kg as a replacement of SBM. Each group consisted of six pens as replicates, with 20 chicks per pen. At 6 wk of age, twelve birds/group were slaughtered. Compared to SBM group, the group fed CWP had higher (P < 0.0001) lightness (L*) and redness (a*) values of PM and BF muscles, the latter had also higher yellowness (b*, P < 0.0001). The collagen and protein contents were significantly higher in CWP group in both PM and BF muscles, while fat was lower (P < 0.001) only in BF muscle. The use of CWP into broilers diets did not neg. impact the textural properties, i.e., hardness, adhesiveness, cohesiveness, springiness, gumminess, chewiness, and resilience of PM and BF, showing similar values in both groups. Also, PM and BF muscles of birds fed CWP had significantly higher (P < 0.05) levels of C:18:3n-3 and C:20:5n-3 compared with birds fed SBM. The n-6/n-3 PUFA ratio was significantly lower in CWP group (11.72 and 7.00) compared to SBM (13.47 and 12.63) for both PM and BF muscles. These results indicate that CWP can be considered a promising protein source for broiler chickens feed.

Scientific Reports published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C22H32O2, Safety of Docosahexaenoic Acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Peng, Tao published the artcileMultiple cross-linked networks enhanced ENR-based composite with excellent self-healing properties, Computed Properties of 119-80-2, the publication is Polymers for Advanced Technologies (2021), 32(8), 2856-2865, database is CAplus.

Self-healing property is an excellent feature that can improve the reliability and durability of the materials. In this study, carboxylic multi-walled carbon nanotubes (S-CNTs) and 2,2′-dithiodibenzoic acid (DTSA) were introduced into epoxidized natural rubber (ENR) to prepare a self-healing rubber. S-CNTs and DTSA could react with epoxy groups of ENR to effectively cross-link ENR, in which the cross-linked network consisted of reversible disulfide bonds, ¦Â-hydroxyl ester bonds, and hydrogen bonds. The reconfigurable cross-linked network endowed the ENR/S-CNTs/DTSA composites with great self-healing behavior with efficiency up to 99.7%. The multiple cross-linked networks also enhanced the mech. properties of the composite, whose tensile strength reached more than 400% of the neat ENR. Addnl., optical microscope and SEM disclosed the evolution of the damaged area during the self-healing process, and the crack could be completely repaired after the healing process. This work provides an effective and concise method to prepare self-healing ENR-based elastomer, and it may expand the research scope of self-healing materials.

Polymers for Advanced Technologies published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C14H10O4S2, Computed Properties of 119-80-2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xie, Dadi published the artcileComprehensive evaluation of caloric restriction-induced changes in the metabolome profile of mice, Synthetic Route of 6217-54-5, the publication is Nutrition & Metabolism (2022), 19(1), 41, database is CAplus and MEDLINE.

Caloric restriction (CR) is known to extend lifespan and exert a protective effect on organs, and is thus a low-cost and easily implemented approach to the health maintenance. However, there have been no studies that have systematically evaluated the metabolic changes that occur in the main tissues affected by CR. This study aimed to explore the target tissues metabolomic profile in CR mice. Male C57BL/6J mice were randomly allocated to the CR group (n = 7) and control group (n = 7). A non-targeted gas chromatog.-mass spectrometry approach and multivariate anal. were used to identify metabolites in the main tissues (serum, heart, liver, kidney, cortex, hippocampus, lung, muscle, and white adipose) in model of CR. We identified 10 metabolites in the heart that showed differential abundance between the 2 groups, along with 9 in kidney, 6 in liver, 6 in lung, 6 in white adipose, 4 in hippocampus, 4 in serum, 3 in cortex, and 2 in muscle. The most significantly altered metabolites were amino acids (AAs) (glycine, aspartic acid, L-isoleucine, L-proline, L-aspartic acid, L-serine, L-hydroxyproline, L-alanine, L-valine, L-threonine, L-glutamic acid, and L-phenylalanine) and fatty acids (FAs) (palmitic acid, 1-monopalmitin, glycerol monostearate, docosahexaenoic acid, 16-octadecenoic acid, oleic acid, stearic acid, and hexanoic acid). These metabolites were associated with 7 different functional pathways related to the metabolism of AAs, lipids, and energy. Our results provide insight into the specific metabolic changes that are induced by CR and can serve as a reference for physiol. studies on how CR improves health and extends lifespan.

Nutrition & Metabolism published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C7H5BClNO2, Synthetic Route of 6217-54-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Li, Jian-Ye published the artcileSynthesis of diaryl sulfides through C-H bond functionalization of arylamides with cobalt salt and elemental sulfur, Category: catalysis-chemistry, the publication is Tetrahedron Letters (2019), 60(13), 895-899, database is CAplus.

A cobalt(II)-mediated, highly chemoselective thioarylation reaction of arylamides with elemental sulfur was reported. This reaction led to the formation of various sym. diaryl sulfides in yields of up to 65% under mild reaction conditions. A cobalt-sulfur radical process was proposed based on preliminary results and mechanistic studies.

Tetrahedron Letters published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C14H10O4S2, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Kim, Sang Wook published the artcileTwo years of experience with the [¹⁸F]FDG production module, Recommanded Product: Tetrabutylammonium hydrogencarbonate, the publication is Nuclear Instruments & Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms (2007), 261(1-2), 816-818, database is CAplus.

Chem. module for a conventional [¹⁸F]FDG production by Bu₄N bicarbonate (TBA) and an acidic hydrolysis was manufactured and evaluated. In this experiment, 75 mM (pH 7.5-7.8) of TBA solution and a ?2-Ci order of [¹⁸F]-fluoride were used for the evaluation. The com. acidic purification cartridge was purchased from GE or UKE. The operation system (OS) was programmed with Lab-View which was selected because of its easy customization of the OS. Small sized solenoid valves (Burkert; type 6124) were selected to reduce the module dimensions (W 350 ¡Á D 270 ¡Á H 250). The total time for the synthesis of [¹⁸F]FDG was 30 ¡À 3 min. The production yield of [¹⁸F]FDG was 60 ¡À 2% on an average at EOS, with the decay uncorrected. The traditional chem. module can provide a good [¹⁸F]FDG production yield by optimizing the operational conditions. The radiochem. purity, radionuclidic purity, acidity, residual solvent, osmolality and endotoxin assess the quality of [¹⁸F]FDG. The examined contents for the quality control of [¹⁸F]FDG are suitable for a clin. application.

Nuclear Instruments & Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C17H37NO3, Recommanded Product: Tetrabutylammonium hydrogencarbonate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Banik, Soma published the artcileModified aggregation pattern of cresyl violet acetate adsorbed on nano clay mineral layers in Langmuir Blodgett film, Formula: C18H15N3O3, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2018), 570-580, database is CAplus.

Present work investigated the modified aggregation behavior of a cationic oxazine dye, Cresyl violet acetate (CVA) in presence of Laponite nano clay mineral layers in aqueousclay mineral dispersion as well as in ultra thin organo-clay hybrid Langmuir Blodgett (LB) films. The presence of non-fluorescent H-dimeric sites in aqueoussolutionof CVA even at very low concentrationdiminishes its fluorescence intensity and CVA ceases to emit any fluorescence in solid state and in the ultrathin films due to the abundance of H-dimeric sites. Incorporation of clay in aqueoussolutiondrastically modified the absorption spectrum of CVA. Organo-clay hybrid film of CVA, fabricated at higher clay concentration, showed intense J-aggregated band due to the formation of J-aggregated species. UV-vis absorption and fluorescence spectroscopy as well as in-situ Brewster angle microscopic (BAM) studies were employed in this investigation.

Journal of Photochemistry and Photobiology, A: Chemistry published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Formula: C18H15N3O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia