Catalysis-chemistry

Schmieder-van de Vondervoort, Lizette published the artcileLow temperature, high conversion, liquid-phase benzylic oxidation with dioxygen by metal/NHPI-catalyzed Co-oxidation with benzaldehyde, Computed Properties of 457-68-1, the publication is European Journal of Organic Chemistry (2003), 578-586, database is CAplus.

A new liquid-phase catalytic oxidation system for the low temperature, high conversion benzylic mono-oxyfunctionalization of 5H-dibenz[b,f]azepine-5-carboxamide (I) into oxcarbazepine with dioxygen has been developed. The method is based on a co-oxidation of I with benzaldehyde in the presence of a four-component catalyst system consisting of Co(OAc)₂, Ni(OAc)₂, Cr(NO₃)₃, and N-hydroxyphthalimide (NHPI). The influence of the catalyst system on the formation and decomposition of the crucial hydroperoxide intermediate has been investigated. Based on these results, the role of each of the components in the catalyst system is discussed. The scope of this method for the oxidation of other substrates has been studied, and the results are compared with those obtained by Co/NHPI catalyzed oxidation of these substrates.

European Journal of Organic Chemistry published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C13H10F2, Computed Properties of 457-68-1.

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

Godeau, Guilhem published the artcileOne-pot Staudinger Ureation reaction to develop superhydrophobic/oleophobic surfaces with urea linkers, SDS of cas: 30670-30-5, the publication is Materials & Design (2017), 116-122, database is CAplus.

In this work, we report for the first time the use of the one-pot Staudinger ureation to link an azido monomer to a perfluorinated amine by taking advantage of a variation of the Staudinger reaction using CO₂ as an electrophile to form an isocyanate in-situ. The formed isocyanate directly reacts with various perfluorinated amines to form the corresponding urea. This chem. pathway is successfully used to prepare new perfluorinated monomers. The monomers were then electrodeposited to form structured surfaces with different wetting properties. Various properties were obtained such as: parahydrophobicity, super hydrophobicity, oleophilicity and strong oleophobicity. This study shows the important influence of the perfluorinated chain on both polymerization and surface properties. This work also illustrates the efficiency of the one-pot Staudinger ureation for new urea monomer elaboration.

Materials & Design published new progress about 30670-30-5. 30670-30-5 belongs to catalysis-chemistry, auxiliary class Polyfluoroalkanes, name is 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, and the molecular formula is C10H6F17N, SDS of cas: 30670-30-5.

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

Salmon, Lionel published the artcileTwo Novel Iron(II) Materials Based on Dianionic N₄O₂ Schiff Bases: Structural Properties and Spin-Crossover Characteristics in the Series [Fe(3-X,5-NO₂-sal-N(1,4,7,10))] (X = H, 3-MeO, 3-EtO), SDS of cas: 38260-01-4, the publication is Inorganic Chemistry (2005), 44(6), 1763-1773, database is CAplus and MEDLINE.

Two spin-crossover (SCO) complexes [Fe^II(3-MeO,5-NO₂-sal-N(1,4,7,10))] (1) and [Fe^II(3-EtO,5-NO₂-sal-N(1,4,7,10))] (2) were prepared and studied (3-MeO,5-NO₂-sal-N(1,4,7,10) and 3-EtO,5-NO₂-sal-N(1,4,7,10) are deprotonated 2-[12-(hydroxy-3-methoxy-5-nitrophenyl)-2,5,8,11-tetraazadodeca-1,11-dien-1-yl]-2-methoxy-4-nitrophenol and 2-[12-(hydroxy-3-ethoxy-5-nitrophenyl)-2,5,8,11-tetraazadodeca-1,11-dien-1-yl]-2-ethoxy-4-nitrophenol, resp.). The x-ray diffraction anal. of complex 1 evidenced the same Pbnb orthorhombic system at 160 K (high-spin (HS) state) and 100 K (low-spin (LS) state). At 160 K, a 8.4810(9), b 14.7704(14), c 18.769(2) ?, V = 2351.2(4) ?³, and Z = 4. At 100 K, a 8.5317(8), b 14.4674(15), c 18.814(2) ?, and V = 2322.2(4) ?³. Complex 2 crystallizes in the P1? triclinic system. At 160 K (HS state), a 10.265(4), b 10.861(4), c 14.181(5) ?, ¦Á 84.18(4), ¦Â 70.53(5), ¦Ã 88.95(5)¡ã, V = 1482.6(10) ?³, and Z = 2. The Fe(II) coordination sphere is distorted octahedral in 1 and 2 with a cis-¦Á arrangement of the N₄O₂ donor set of the hexadentate ligand. The mols. are connected into 1-dimensional infinite chains through H contacts involving the secondary amine functions and O_nitro atoms of the ligands in adjacent mols. Study of their magnetic properties and Mossbauer spectra revealed very different SCO behaviors: complex 1 exhibits a cooperative SCO without residual LS or HS fraction; complex 2 shows a LS ? HS SCO involving ?5% of the Fe^II ions in the 30-150 K range. The phenomenol. cooperative interaction parameter J = 138 K evaluated from the area of the hysteresis loop indicates a cooperative effect weaker in 1 than in [Fe^II(5NO₂-sal-N(1,4,7,10))]. The theor. approach to the SCO in 2 indicates a HS ground state and a LS 1st excited level 53 K above: the thermal dependence of the system occurs through population of vibrational states. Comparison of the structural and electronic properties of the ferrous SCO materials with parent N₄O₂ ligands shows that the properties of SCO are closely related to intermol. interactions and crystal packing.

Inorganic Chemistry published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C6H20Cl2N4, SDS of cas: 38260-01-4.

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

Beaulieu, Pierre L. published the artcileNon-Nucleoside Benzimidazole-Based Allosteric Inhibitors of the Hepatitis C Virus NS5B Polymerase: Inhibition of Subgenomic Hepatitis C Virus RNA Replicons in Huh-7 Cells, Application of 1,1-Dimethylthiourea, the publication is Journal of Medicinal Chemistry (2004), 47(27), 6884-6892, database is CAplus and MEDLINE.

A previously disclosed series of nonnucleoside allosteric inhibitors of the NS5B polymerase of the hepatitis C virus (HCV) was optimized to yield novel compounds with improved physicochem. properties and activity in cell-based assays. Replacement of ionizable carboxylic acids with neutral substituents in lead compounds produced inhibitors with cellular permeability and antiviral activity in a cell-based assay of subgenomic HCV RNA replication (replicon EC₅₀ as low as 1.7 ¦ÌM). The improvement in potency in this ex vivo model of HCV RNA replication validates, in part, the mechanism by which this class of allosteric benzimidazole derivatives inhibits the polymerase and represents a significant step forward in the discovery of novel HCV therapeutics.

Journal of Medicinal Chemistry 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 of 1,1-Dimethylthiourea.

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

Forteza, Fabiola published the artcileInfluence of diet on acute endocannabinoidome mediator levels post exercise in active women, a crossover randomized study, Synthetic Route of 6217-54-5, the publication is Scientific Reports (2022), 12(1), 8568, database is CAplus and MEDLINE.

The extended endocannabinoid system, also termed endocannabinoidome, participates in multiple metabolic functions in health and disease. Phys. activity can both have an acute and chronic impact on endocannabinoid mediators, as does diet. In this crossover randomized controlled study, we investigated the influence of diet on the peripheral response to acute maximal aerobic exercise in a sample of active adult women (n = 7) with no underlying metabolic conditions. We compared the impact of 7-day standardized Mediterranean diet (MedDiet) and control diet inspired by Canadian macronutrient intake (CanDiet) on endocannabinoidome and short-chain fatty acid metabolites post maximal aerobic exercise. Overall, plasmatic endocannabinoids, their congeners and some polyunsaturated fatty acids increased significantly post maximal aerobic exercise upon cessation of exercise and recovered their initial values within 1 h after exercise. Most N-acylethanolamines and polyunsaturated fatty acids increased directly after exercise when the participants had consumed the MedDiet, but not when they had consumed the CanDiet. This impact was different for monoacylglycerol endocannabinoid congeners, which in most cases reacted similarly to acute exercise while on the MedDiet or the CanDiet. Fecal microbiota was only minimally affected by the diet in this cohort. This study demonstrates that endocannabinoidome mediators respond to acute maximal aerobic exercise in a way that is dependent on the diet consumed in the week prior to exercise.

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, Synthetic Route of 6217-54-5.

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

Shi, Zhuangzhi published the artcileRh(III)-Catalyzed intramolecular redox-neutral cyclization of alkenes via C-H activation, Safety of O-Pivaloylhydroxylamine trifluoromethanesulfonate, the publication is Chemical Communications (Cambridge, United Kingdom) (2014), 50(20), 2650-2652, database is CAplus and MEDLINE.

Biol. interesting fused oligocyclic lactams were prepared via an intramol. redox-neutral cyclization process. By the proper choice of the substrates with a wide variety of tethered olefins, the less favored C-H bond can be activated and functionalized. This C-H activation proceeds under mild conditions, obviates the need for external oxidants, and displays a broad scope with respect to the substituents.

Chemical Communications (Cambridge, United Kingdom) published new progress about 1293990-73-4. 1293990-73-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is O-Pivaloylhydroxylamine trifluoromethanesulfonate, and the molecular formula is C30H24BrCuN2P, Safety of O-Pivaloylhydroxylamine trifluoromethanesulfonate.

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

El Hajj, A. published the artcileNew process of preparation of pyrazolidine: synthesis, extraction and flow-sheet, Related Products of catalysis-chemistry, the publication is MATEC Web of Conferences (2013), 01045, database is CAplus.

A new process for the preparation of the pyrazolidine (PYRZ), by intramol. Raschig way was developed. Synthesis and extraction are described. The formation of pyrazolidine is carried out in two successive steps. The first involves the oxidation of 1,3-diaminopropane (DAP) by sodium hypochlorite and formation of N-chloro-1,3-diaminopropane. The second step consists of a cyclization of N-chloro-1,3-diaminopropane leading to pyrazolidine. For the extraction the authors determined 3 isothermal sections (289, 313, and 323 K) of the solid-liquid-liquid isobaric ternary system H2O-DAP-NaOH by isoplethic thermal anal. and acid-base titration The second stage involves a selective precipitation of the two compounds in form of a salt by addition of hydrochloric acid.

MATEC Web of Conferences published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, Related Products of catalysis-chemistry.

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

Ruseler-Van Embden, J. G. H. published the artcileThe applicability of redox-indicator dyes in strongly reduced media; their effect on the human fecal flora, Formula: C18H15N3O3, the publication is FEMS Microbiology Letters (1985), 28(3), 341-5, database is CAplus.

Cresyl violet acetate was found to be an appropriate redox-indicator dye in anaerobic culture media with low redox potentials. Low redox potentials (E‘_h -250 to -300 mV) in media were obtained by addition of dithiothreitol (DTT). DTT and cresyl violet acetate in media did not influence the total number of anaerobes cultured from human feces.

FEMS Microbiology Letters 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