Catalysis-chemistry

Bollens, E. published the artcileSynthesis of long chain, perfluoroalkylethyl isothiocyanates, Name: 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, the publication is Journal of Fluorine Chemistry (1991), 53(1), 1-14, database is CAplus.

CF₃(CF₂)_nCH₂CH₂NCS (I, n = 3, 5, 7) were prepared in 69-73% yield by treating CF₃(CF₂)_nCH₂CH₂N₃ with CS₂ in the presence of PPh₃. I were also obtained in 65-76% yield by treating CF₃(CF₂)_nCH₂CH₂NH₂ with CS₂ in the presence of NaOH and ClCO₂Me or NaOCl.

Journal of Fluorine Chemistry 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, Name: 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine.

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

Trabelsi, H. published the artcileSynthesis of 2-F-alkylethylamines: optimization of the production of 2-F-alkylethyl azides and their reduction to the corresponding amines, Application of 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, the publication is Journal of Fluorine Chemistry (1994), 69(1), 115-17, database is CAplus.

2-(Perfluoroalkyl)ethylamines are very important intermediates in organic fluorine chem. It is possible to combine the advantages of two techniques, i.e., phase-transfer catalysis and the use of water as a dispersing medium, in the reduction of 2-(perfluoroalkyl)ethyl azides, and hence simplify significantly the synthesis of such amines from 2-(perfluoroalkyl)ethyl iodides. Thus, CF₃(CF₂)_nCH₂CH₂R (I; R = iodo, n = 3, 5, 7) were converted to I (R = N₃) by a phase-transferred catalyzed reaction with NaN₃. Subsequent reduction of I (R = N₃) with N₂H₄/Raney Ni gave 70-80% I (R = NH₂).

Journal of Fluorine Chemistry 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 C5H10O2S, Application of 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine.

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

Lee, Hyunji published the artcileSynthesis and Analysis of Natural-Product-Like Macrocycles by Tandem Oxidation/Oxa-Conjugate Addition Reactions, Related Products of catalysis-chemistry, the publication is Chemistry – A European Journal (2019), 25(26), 6500-6504, database is CAplus and MEDLINE.

Here, a strategy for the preparation of a broad natural-product-like macrocyclic library e.g., I by using the tandem allylic oxidation/oxa-conjugate addition and macrocyclization reactions is reported. Cheminformatic analyses demonstrate that this tetrahydropyran-containing macrocyclic library shows a significant overlap with natural products in the chem. space. This approach can be used for designing libraries that may probe more deeply into natural-product-like space.

Chemistry – A European Journal 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 C6H12F3NO5S, Related Products of catalysis-chemistry.

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

James, Anto published the artcileModeling the Adsorption of Polycyclic Aromatic Hydrocarbons on Graphynes: An Improved Lennard-Jones Formulation, Quality Control of 191-07-1, the publication is Journal of Physical Chemistry A (2022), 126(22), 3472-3485, database is CAplus and MEDLINE.

Research on the development of theor. methodologies for modeling noncovalent interactions governing the adsorption of polycyclic aromatic hydrocarbons (PAHs) on graphene and other two-dimensional materials is being intensely pursued in recent times. Highly accurate empirical potentials have emerged as a viable alternative to first-principles calculations for performing large-scale simulations. Herein, we report exploration of the potential energy surfaces for the adsorption of cata-condensed and peri-condensed PAHs on graphynes (GYs) using the improved Lennard-Jones (ILJ) potential. Initially, the ILJ potential is parametrized against benchmark electronic structure calculations performed on a selected set of PAH-GY complexes using dispersion-corrected d. functional theory. The accuracy of the parametrization scheme is then assessed by a comparison of the adsorption features predicted from the ILJ potential with those computed using electronic structure calculations The potential energy profiles as well as the single point energy calculations and geometry reoptimizations performed on the min.-energy configurations predicted by the ILJ potential for a broader range of PAH-GY complexes provided a validation of the parametrization scheme. Finally, by an extrapolation of the PAH adsorption energies on various GYs, we estimated the interlayer cohesion energies for the van der Waals bilayer heterostructures of GYs with graphene to be in the range of 25-50 meV/atom.

Journal of Physical Chemistry A published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Quality Control of 191-07-1.

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

Kalow, Julia A. published the artcileSynthesis of Miktoarm Branched Conjugated Copolymers by ROMPing In and Out, Formula: C10H6F17N, the publication is ACS Macro Letters (2015), 4(11), 1229-1233, database is CAplus and MEDLINE.

Architecture represents a promising yet underutilized control element in polymer design due to the challenging synthesis of compositionally varied branched copolymers. We report the one-pot synthesis of miktoarm branched polymers by ring-opening metathesis polymerization In this work, we graft to and from telechelic poly(3-hexylthiophene), which is end-capped by oxime click chem., using various norbornene monomers. The self-assembly of the resulting miktoarm H-shaped conjugated polymers is studied in solution and in the solid state. A dual stimuli-responsive miktoarm polymer is prepared that displays pH-switchable lower critical solution temperature and fluorescence.

ACS Macro Letters 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, Formula: C10H6F17N.

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

Mikaeloff, Flora published the artcileTrans cohort metabolic reprogramming towards glutaminolysis in long-term successfully treated HIV-infection, Application In Synthesis of 63-68-3, the publication is Communications Biology (2022), 5(1), 27, database is CAplus and MEDLINE.

Despite successful combination antiretroviral therapy (cART), persistent low-grade immune activation together with inflammation and toxic antiretroviral drugs can lead to long-lasting metabolic flexibility and adaptation in people living with HIV (PLWH). Our study investigated alterations in the plasma metabolic profiles by comparing PLWH on long-term cART(>5 years) and matched HIV-neg. controls (HC) in two cohorts from low- and middle-income countries (LMIC), Cameroon, and India, resp., to understand the system-level dysregulation in HIV-infection. Using untargeted and targeted LC-MS/MS-based metabolic profiling and applying advanced system biol. methods, an altered amino acid metabolism, more specifically to glutaminolysis in PLWH than HC were reported. A significantly lower level of neurosteroids was observed in both cohorts and could potentiate neurol. impairments in PLWH. Further, modulation of cellular glutaminolysis promoted increased cell death and latency reversal in pre-monocytic HIV-1 latent cell model U1, which may be essential for the clearance of the inducible reservoir in HIV-integrated cells.

Communications Biology published new progress about 63-68-3. 63-68-3 belongs to catalysis-chemistry, auxiliary class Natural product, name is (S)-2-Amino-4-(methylthio)butanoic acid, and the molecular formula is C5H11NO2S, Application In Synthesis of 63-68-3.

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

Exner, Otto published the artcileSubstituent effects in infrared spectroscopy. I. The O-H stretching frequencies in monomeric benzoic acids, Formula: C14H12O3, the publication is Collection of Czechoslovak Chemical Communications (1971), 36(2), 534-43, database is CAplus.

The O-H stretching frequencies of 60 meta- and para-substituted benzoic acids were measured in dilute CCl4 solution The IR values were correlated by the Hammett equation with normal ¦Ò constants and slope ¦Ñ = -11.7 cm-1 on the one hand, and by the equation vp-v0 = 1.14 (vm-v0) on the other hand, where the frequency v0 refers to the unsubstituted compound The validity of the latter for substituents without an ¦Á lone electron pair was confirmed even in IR spectroscopy. Somewhat lesser accuracy of the Hammett correlation is probably due to a different solvent than used in determining the ¦Ò constants; deviations of a systematic character were not observed

Collection of Czechoslovak Chemical Communications published new progress about 31719-76-3. 31719-76-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 4-(Phenoxymethyl)benzoic acid, and the molecular formula is C14H12O3, Formula: C14H12O3.

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

Saidalimu, Ibrayim published the artcileConstruction of Fluorinated Benzoxathiin Skeleton by Successive Perfluorophenylthiolation/Cyclization of Activated ¦Á-Methylene Ketones by Perfluorophenyl Diethylaminosulfur Difluoride, Computed Properties of 1206-46-8, the publication is Organic Letters (2017), 19(5), 1012-1015, database is CAplus and MEDLINE.

Pharmaceutically attractive fluorinated benzoxathiin (thiaflavan) skeleton I (wherein EWG is CO₂R¹, COR¹, SO₂Ph and R is aromatic, alkyl or heteroaryl) was directly constructed by the reaction of activated ¦Á-methylene ketones 1 such as ¦Â-keto esters, 1,3-diketone, and ¦Â-keto sulfones with a perfluorophenyl analog of diethylaminosulfur trifluoride, C₆F₅-DAST, in high yields via successive perfluorophenylthiolation/cyclization reaction.

Organic Letters published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C9H9F5Si, Computed Properties of 1206-46-8.

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

Saidalimu, Ibrayim published the artcileSuccessive C-C bond cleavage, fluorination, trifluoromethylthio- and pentafluorophenylthiolation under metal-free conditions to provide compounds with dual fluoro-functionalization, Recommanded Product: Trimethyl(perfluorophenyl)silane, the publication is Chemical Science (2016), 7(3), 2106-2110, database is CAplus and MEDLINE.

The selective C-C bond cleavage and simultaneous formation of two C-F bonds and one C-S bond in ¦Â-keto esters with nucleophilic fluorination reagents such as DAST under metal-free/catalyst-free conditions was disclosed. Double fluorination at two remote carbons with addnl. dialkylamino-sulfenylation provided unique fluorinated compounds in good to high yields. This method was applied for the successive C-C bond cleavage/fluorination/trifluoromethylthiolation of ¦Â-keto esters using trifluoromethyl-DAST (CF₃-DAST) providing different type of fluorinated and trifluoromethylthiolated compounds via a shunt pathway. Doubly fluoro-functionalized compounds obtained in these reactions were unique and difficult to synthesize by other methods.

Chemical Science published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C9H9F5Si, Recommanded Product: Trimethyl(perfluorophenyl)silane.

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

Zasedateleva, Olga A. published the artcilePCR incorporation of dUMPs modified with aromatic hydrocarbon substituents of different hydrophilicities: Synthesis of C5-modified dUTPs and PCR studies using Taq, Tth, Vent (exo-) and Deep Vent (exo-) polymerases, Recommanded Product: 4-Nitrophenylacetic acid, the publication is Bioorganic Chemistry (2020), 103829, database is CAplus and MEDLINE.

Deoxyuridine triphosphate derivatives (dUTPs) modified at the C5 position of the pyrimidine ring with various aromatic hydrocarbon substituents of different hydrophilicities have been synthesized. The aromatic hydrocarbon substituents were attached to dUTPs via a CH=CH-CH₂-NHCO-CH₂ linker. The efficiency of the PCR incorporation of modified dUMPs using Taq, Tth, Vent (exo-) and Deep Vent (exo-) polymerases and a model DNA template containing one, two and three adjacent adenine nucleotides at three different sites within the sequence was investigated. For all the polymerases used, the yield of the modified PCR product was significantly increased with increasing hydrophilicity of the aromatic hydrocarbon substituent. In particular, for the above polymerases, the efficiency of the incorporation of dUMPs modified with the most hydrophilic of the studied aromatic hydrocarbon substituents, a 4-hydroxyphenyl residue, was 60-85% of the efficiency of dTMP incorporation. At the same time, the relative efficiencies of the incorporation of dUMPs modified with 2-, 4-methoxyphenyl, Ph and 4-nitrophenyl substituents ranged from 20 to 50% and were 2-18% for the 1-naphthalene and 4-biphenyl groups, which were the most hydrophobic of the studied aromatic hydrocarbon substituents.

Bioorganic Chemistry published new progress about 104-03-0. 104-03-0 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Carboxylic acid,Benzene, name is 4-Nitrophenylacetic acid, and the molecular formula is C9H10O3S, Recommanded Product: 4-Nitrophenylacetic acid.

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