Month: November 2022

Senthamarai, Thirusangumurugan published the artcileA “universal” catalyst for aerobic oxidations to synthesize (hetero)aromatic aldehydes, ketones, esters, acids, nitriles, and amides, COA of Formula: C8H8O2, the publication is Chem (2022), 8(2), 508-531, database is CAplus.

Here, the preparation of graphitic layers encapsulated in Co-nanoparticles by pyrolysis of cobalt-piperazine-tartaric acid complex on carbon as a most general oxidation catalyst was reported. This unique material allows for the synthesis of simple, functionalized, and structurally diverse (hetero)aromatic aldehydes, ketones, carboxylic acids, esters, nitriles, and amides from alcs. in excellent yields in the presence of air.

Chem published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C9H9F5Si, COA of Formula: C8H8O2.

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

Swamy, K. C. Kumara published the artcilePentacoordinated molecules. 79. Pentacoordinate acyclic and cyclic anionic oxysilicates. A silicon-29 NMR and x-ray structural study, Recommanded Product: Difluorodiphenylsilane, the publication is Journal of the American Chemical Society (1990), 112(6), 2341-8, database is CAplus.

Variable temperature ²⁹Si NMR spectral measurements revealed the formation of acyclic anionic silicates, [R_n‘Si(OR)_5-n][K,18-crown-6], n = 0-3, from reactions of alkoxy and aryloxysilanes with the resp. potassium alkoxide or potassium aryloxide in the presence of 18-crown-6. This elusive class of substances has been proposed as model intermediates in the sol-gel process. In the case of [PhSi(OCH₂CF₃)₄][K,18-crown-6], isolation as a crystalline solid was achieved. The ²⁹Si chem. shifts move progressively downfield from Si(OR)₅^– to R’Si(OR)₄^– to R₂‘Si(OR)₃^–. Pentaalkoxysilicate anions react rapidly with pinacol to form the corresponding five-coordinated bicyclic anionic silicate. Independent synthesis and an x-ray structural study verified the formation of the bis(pinacolate) [(OCMe₂CMe₂O)₂SiOCHMe₂][K,18-crown-6] (I). For comparison of structural distortions, the synthetic and x-ray characterization of the related anionic oxysilicates [(C₆H₄(CF₃)₂CO)₂SiR][Et₄N] (II) and [(C₆H₄O₂)₂SiR][Me₂NH₂] (III) (R = cyclohexyl) are reported. The structures of I and II are trigonal-bipyramidal and that of III is rectangular-pyramidal.

Journal of the American Chemical Society published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C9H9F5Si, Recommanded Product: Difluorodiphenylsilane.

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

Menon, Swetha S. published the artcileCopper- Based Metal-Organic Frameworks as Peroxidase Mimics Leading to Sensitive H₂O₂ and Glucose Detection, Application of 2,2′-Dithiodibenzoic acid, the publication is ChemistrySelect (2018), 3(28), 8319-8324, database is CAplus.

A copper based metal organic framework (MOF) synthesized under solvo-thermal conditions was found to exhibit intrinsic peroxidase-like activity and was established both spectrophotometrically and electrochem. It was found that the catalytic behavior had been consistent with Michaelis-Menten kinetics with a Km value of 0.08 mM with H₂O₂, relatively lower than that of Horseradish peroxidase enzyme (HRP) ie; 3.7 mM. The suitability of Cu-MOF for sensing H₂O₂ was investigated by electrochem. means. In the case of electrochem. studies, the Cu-MOF modified GCE (glassy carbon electrode) showed a very high sensitivity of 263¦ÌA mmol^-1 cm^-2 with a detection limit up to 35 mM for H₂O₂. The peroxidase mimics can be combined with the enzymic oxidation of glucose for sensing glucose. The detection of H₂O₂ and glucose using Cu-MOF was found to be highly selective towards the common interfering species.

ChemistrySelect 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, Application of 2,2′-Dithiodibenzoic acid.

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

Erb, Sophia J. published the artcileresponsiveness of PNPLA3 and lipid-related transcription factors is dependent upon fatty acid profile in primary bovine hepatocytes, Computed Properties of 6217-54-5, the publication is Scientific Reports (2022), 12(1), 888, database is CAplus and MEDLINE.

Knockdown of patatin-like phospholipase domain-containing protein 3 (PNPLA3) increased triglycerides (TG) in primary bovine hepatocytes, suggesting that PNPLA3 plays a causal role in hepatic TG clearing. In vivo, PNPLA3 abundance across the periparturient period is inversely related to hepatic TG accumulation and circulating fatty acid (FA) concentrations The purpose of this research was to determine if PNPLA3, as well as other lipases, transcription factors, or FA-mediated genes, are regulated by FA mimicking liver lipid accumulation (ACCUM) and liver lipid clearing (RECOV) or singular FA physiol. found in dairy cows at 0.5 mM of circulating RECOV (iRECOV). Abundance of PNPLA3 tended to decrease with ACCUM and increased quadratically with RECOV (P ¡Ü 0.10), differing from PNPLA3 expression, but consistent with previous in vivo research. Adipose TG lipase abundance, but not other lipase abundances, was quadratically responsive to both ACCUM and RECOV (P ¡Ü 0.005). Abundance of PNPLA3 and SREBP1c and expression of LXRA responded similarly to iRECOV, with C18:0 tending to decrease abundance (P ¡Ü 0.07). Result indicate that bovine PNPLA3 is translationally regulated by FA and although a LXRA-SREBP1c pathway mediation is possible, the mechanism warrants further investigation.

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, Computed Properties of 6217-54-5.

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

Ayurini, Meri published the artcilePolymer end group control through a decarboxylative cobalt-mediated radical polymerization: new avenues for synthesizing peptide, protein and nanomaterial conjugates, Quality Control of 71989-31-6, the publication is JACS Au (2022), 2(1), 169-177, database is CAplus and MEDLINE.

Cobalt-mediated radical polymerizations (CMRPs) have been initiated by the radical decarboxylation of tetrachlorophthalimide activated esters. This allows for the controlled radical polymerization of activated monomers across a broad temperature range with a single cobalt species, with incorporation of polymer end groups derived from simple carboxylic acids derivatives and termination with an organozinc reagent. This method has been applied to the synthesis of a polymer/graphene conjugate and a water-soluble protein/polymer conjugate, demonstrating the first examples of CMRP in graphene and protein conjugation.

JACS Au published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Quality Control of 71989-31-6.

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

Dravid, R. N. published the artcileDithioallophanic acids. Part-III: Interaction of carbon oxysulfide with 2-S-benzyl-1,1-dimethyl/1-phenylisothiocarbamides, Application In Synthesis of 6972-05-0, the publication is Journal of the Indian Chemical Society (1983), 60(9), 855-7, database is CAplus.

Interaction of COS with 2-S-benzyl-1,1-dimethylisothiocarbamide in benzene gave 1,1-dimethylthiocarbamide thiocyanate, S-benzyl N,N-dimethylthiocarbamate and S-benzyl N,N-di-methyldithiocarbamate. 2-S-Benzyl-1-phenylisothiocarbamide also affords the corresponding thiocarbamate, dithiocarbamate and in addition phenylthiocarbamide. The mechanism was discussed.

Journal of the Indian Chemical Society published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Application In Synthesis of 6972-05-0.

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

Zhang, Qingyu published the artcileHypervalent Chalcogenonium…¦Ð Bonding Catalysis, Related Products of catalysis-chemistry, the publication is Angewandte Chemie, International Edition, database is CAplus and MEDLINE.

A proof-of-concept study of hypervalent chalcogenonium…¦Ð bonding catalysis was performed. A new catalytic strategy using 1,2-oxaselenolium salts as chalcogen bond donors and alkenes as chalcogen bond acceptors is described. The feasibility of this concept is demonstrated by the use of trisubstituted selenonium salts in the metal-free catalytic hydrofunctionalization and polymerization of alkenes via unconventional seleniranium ion-like intermediates. The results indicate that counter anions have a significant effect on the catalysis based on hypervalent chalcogenonium…¦Ð bonding interactions.

Angewandte Chemie, International Edition published new progress about 2051-95-8. 2051-95-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ketone, name is 3-Benzoylpropionicacid, and the molecular formula is C8H10S, Related Products of catalysis-chemistry.

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

Kar, M. R. published the artcileImpact of Zn-doping on the composition, stability, luminescence properties of silica coated all-inorganic cesium lead bromide nanocrystals and their biocompatibility, SDS of cas: 13822-56-5, the publication is Materials Today Chemistry (2022), 100753, database is CAplus.

Cesium lead halide (CsPbX₃: X = I, Br, Cl) nanocrystals (NCs) are believed to be potential candidates for bioimaging applications. However, their low structural stability against polar solvents remains as a major limitation. To improve the NCs stability and maintain high emission intensity, we synthesized silica coated Zn-doped core@shell perovskite NCs via modified ligand assisted reprecipitation (LARP) synthetic method under relatively high humid condition. We systemically varied the composition inside the perovskite structure and then studied their photophys. properties and stability. Interestingly, the Zn-doping amount controls the ratio of CsPbBr₃ to Cs₄PbBr₆ perovskites inside the core and also facilitates the growth of (OA)₂PbBr₄ shell, enables overall increase in NCs emission intensity and stability. We observed green color emission from these NCs in the spectral range of 494-506 nm with a maximum photoluminescence quantum yield (PLQY) up to 88%. The optimized Zn-doped NCs exhibited nearly four times better water stability compared to the bare NCs and retain emission properties for several months even in highly polar solvents. Finally, we performed biocompatibility test of the NCs generated on biol. samples and hydroponics test in a gardenia leaf for their potential bioimaging applications.

Materials Today Chemistry published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C6H17NO3Si, SDS of cas: 13822-56-5.

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

Pinto, Miguel N. published the artcileTherapeutic Potential of Two Visible Light Responsive Luminescent photoCORMs: Enhanced Cellular Internalization Driven by Lipophilicity, Recommanded Product: 1,3,5-Triazaadamantan-7-amine, the publication is Inorganic Chemistry (2019), 58(21), 14522-14531, database is CAplus and MEDLINE.

Herein we report the synthesis, characterization, and cellular internalization properties of two visible-light active luminescent Mn-based photoCORMs. The enhanced membrane permeability of the photoactive Mn carbonyl complex (photoCORM) derived from a designed lipophilic ligand namely, [Mn(CO)₃(Imdansyl)(L1)](CF₃SO₃) (1) (where L1 = a diazabutadiene-based ligand containing two highly lipophilic adamantyl motifs, Imdansyl = dansylimidazole) promoted rapid internalization within human colorectal adenocarcinoma (HT-29) cells compared to [Mn(CO)₃(Imdansyl)(L2)](CF₃SO₃) (2) (where L2 = a diazabutadiene ligand bearing two hydrophilic 1,3,5-triazaadamantyl group). Colocalization experiments using membrane stain indicate different extents of localization of the two CO complexes within the cellular matrix. Visible-light triggered CO release from the lipophilic photoCORM induced caspase-3/7 activation on HT-29 cells, which was detected using confocal microscopy. The rapid accumulation of the lipophilic photoCORM 1 in the cellular membrane resulted in more efficient CO-induced cell death compared to the hydrophilic analog 2. A photoactive Mn(I) carbonyl complex derived from a designed lipophilic ligand is readily uptaken by cancer cells and leads to CO-induced apoptotic cell death under illumination.

Inorganic Chemistry published new progress about 14707-75-6. 14707-75-6 belongs to catalysis-chemistry, auxiliary class Triazinanes, name is 1,3,5-Triazaadamantan-7-amine, and the molecular formula is C7H14N4, Recommanded Product: 1,3,5-Triazaadamantan-7-amine.

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

Jimenez, Jorge published the artcileFive- and Six-Coordinated Silver(I) Complexes Derived from 2,6-(Pyridyl)iminodiadamantanes: Sustained Release of Bioactive Silver toward Bacterial Eradication, Recommanded Product: 1,3,5-Triazaadamantan-7-amine, the publication is Inorganic Chemistry (2017), 56(9), 4784-4787, database is CAplus and MEDLINE.

Ag(I) complexes of two designed tridentate ligands, namely, 2,6-(pyridyl)iminoditriazaadamantane (pydTAm) and 2,6-(pyridyl)iminodiadamantane (pydAm), were synthesized and structurally characterized. [Ag(pydTAm)₂](CF₃SO₃) (1), the hitherto unknown mer isomer of a Ag(I) octahedral complex, crystallizes in a highly sym. body centered cubic I4?3m space group. Quite in contrast, the Ag^I center in the analogous [Ag(pydAm)₂](CF₃SO₃) (2) complex resides in a trigonal-bipyramidal geometry and crystallizes in a triclinic P1? space group with two crystallog. independent mols. in the asym. unit. Complex 1 exhibits exceptional solubility in aqueous media and leads to the efficient eradication of several bacterial strains upon sustained release of bioactive Ag.

Inorganic Chemistry published new progress about 14707-75-6. 14707-75-6 belongs to catalysis-chemistry, auxiliary class Triazinanes, name is 1,3,5-Triazaadamantan-7-amine, and the molecular formula is C7H14N4, Recommanded Product: 1,3,5-Triazaadamantan-7-amine.

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