Catalysis-chemistry

Wang, Shan published the artcilenBu₄NI-catalyzed oxidative amidation of aldehydes with tertiary amines, Computed Properties of 2909-77-5, the publication is Tetrahedron Letters (2013), 54(46), 6233-6236, database is CAplus.

An efficient oxidative coupling protocol for amide formation has been developed. Various tertiary amines and aromatic aldehydes were oxidized to their corresponding tertiary amides in moderate to good yields in the presence of a simple Bu₄NI catalyst.

Tetrahedron Letters published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C7H8O3, Computed Properties of 2909-77-5.

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

Gao, Mingyang published the artcileZeolite-encaged palladium catalysts for heterogeneous Suzuki-Miyaura cross-coupling reactions, Quality Control of 613-33-2, the publication is Catalysis Today, database is CAplus.

Herein, zeolite-encaged Pd particles, namely Pd@MFI, have been successfully prepared via an in-situ hydrothermal strategy and investigated as promising heterogeneous catalysts for Suzuki-Miyaura cross-coupling reactions. Characterization results demonstrate that high dispersed Pd particles with apparent sizes of 1-2 nm have been encaged in and efficiently stabilized by the matrix of MFI zeolite. The as-prepared Pd@MFI catalysts are active in the Suzuki-Miyaura coupling reaction between bromobenzene and phenylboronic acid, and the presence of basic sites adjacent to Pd sites are crucial to achieving high catalytic activity via effective cooperation. Pd@K-ZSM-5 was optimized for the coupling between bromobenzene and phenylboronic acid and catalyze the reaction with a low apparent activation energy value of 41.2 kJ/mol. Pd@K-ZSM-5 also showed good stability and can be recycled for at least five times without obvious loss in activity, demonstrating its great potential as a heterogeneous catalyst for Suzuki-Miyaura cross-coupling reactions. Encapsulation of metal species in zeolite matrix offers a big opportunity to the heterogenization of homogeneous metal catalysts for practical chem. transformations.

Catalysis Today published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Quality Control of 613-33-2.

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

Rios, Alejandra published the artcileA novel multi-reaction microdroplet platform for rapid radiochemistry optimization, Quality Control of 17351-62-1, the publication is RSC Advances (2019), 9(35), 20370-20374, database is CAplus and MEDLINE.

During the development of novel tracers for positron emission tomog. (PET), the optimization of the synthesis is hindered by practical limitations on the number of experiments that can be performed per day. Here we present a microliter droplet chip that contains multiple sites (4 or 16) to perform reactions simultaneously under the same or different conditions to accelerate radiosynthesis optimization.

RSC Advances 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, Quality Control of 17351-62-1.

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

Ota, Eisuke published the artcileA Redox Strategy for Light-Driven, Out-of-Equilibrium Isomerizations and Application to Catalytic C-C Bond Cleavage Reactions, Related Products of catalysis-chemistry, the publication is Journal of the American Chemical Society (2019), 141(4), 1457-1462, database is CAplus and MEDLINE.

We report a general protocol for the light-driven isomerization of cyclic aliphatic alcs. to linear carbonyl compounds These reactions proceed via proton-coupled electron-transfer activation of alc. O-H bonds followed by subsequent C-C ¦Â-scission of the resulting alkoxy radical intermediates. In many cases, these redox-neutral isomerizations proceed in opposition to a significant energetic gradient, yielding products that are less thermodynamically stable than the starting materials. A mechanism is presented to rationalize this out-of-equilibrium behavior that may serve as a model for the design of other contrathermodynamic transformations driven by excited-state redox events.

Journal of the American Chemical Society published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Related Products of catalysis-chemistry.

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

Grohmann, Christoph published the artcileRh[III]-Catalyzed Direct C-H Amination Using N-Chloroamines at Room Temperature, Computed Properties of 1293990-73-4, the publication is Organic Letters (2012), 14(2), 656-659, database is CAplus and MEDLINE.

An efficient Rh(III)-catalyzed direct C-H amination of N-pivaloyloxy benzamides with N-chloroamines proceeding at room temperature was achieved. The versatile directing group allows for selective mono- and diamination and can be readily converted to give valuable benzamide or aminoaniline derivatives, e.g., I. Mechanistic studies have been carried out to elucidate the reaction pathway.

Organic Letters 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, Computed Properties of 1293990-73-4.

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

Grohmann, Christoph published the artcileRh[III]-Catalyzed C-H Amidation Using Aroyloxycarbamates To Give N-Boc Protected Arylamines, HPLC of Formula: 1293990-73-4, the publication is Organic Letters (2013), 15(12), 3014-3017, database is CAplus and MEDLINE.

The Rh(III)-catalyzed amidation of C(sp²)-H bonds by the use of electron-deficient aroyloxycarbamates as efficient electrophilic amidation partners is reported. The reaction proceeded under mild conditions with broad functional group tolerance, and pyridine and O-Me hydroxamic acids serve as efficient directing groups, giving access to valuable N-Boc protected arylamines (also Fmoc and Cbz). Preliminary mechanistic experiments are discussed.

Organic Letters 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, HPLC of Formula: 1293990-73-4.

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

Shimizu, Takeshi published the artcilePorous Metal-Organic Frameworks Containing Reversible Disulfide Linkages as Cathode Materials for Lithium-Ion Batteries, Application of 2,2′-Dithiodibenzoic acid, the publication is ChemSusChem (2020), 13(9), 2256-2263, database is CAplus and MEDLINE.

Three porous disulfide-ligand-containing metal-organic frameworks (DS-MOFs) and two nonporous coordination polymers with disulfide ligands (DS-CPs) with various structural dimensionalities were used as cathode active materials in lithium batteries. Charge/discharge performance examinations revealed that only porous DS-MOF-based batteries exhibited significant capacities close to the theor. values, which was ascribed to the insertion of electrolyte ions into the DS-MOFs. The insolubility of porous 3 D DS-MOFs in the electrolyte resulted in cycling performances superior to that of their 1 D and 2 D porous counterparts. Battery reactions were probed by instrumental analyses. The dual redox reactions of metal ions and disulfide ligands in the MOFs resulted in higher capacities, and the presence of reversible electrochem. dynamic S-S bonds stabilized the cycling performance. Thus, the strategy of S-S moiety trapping in MOFs and the obtained correlation between the structural features and battery performance could contribute to the design of high-performance MOF-based batteries and the practical realization of Li-S batteries.

ChemSusChem 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 C3H5BN2O2, Application of 2,2′-Dithiodibenzoic acid.

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

Wang, Xinchao published the artcileNative carboxyl group-assisted C-H acetoxylation of hydrocinnamic and phenylacetic acids, Category: catalysis-chemistry, the publication is Chemical Communications (Cambridge, United Kingdom) (2022), 58(32), 4993-4996, database is CAplus and MEDLINE.

A method of native carboxyl-assisted, Pd(II)-catalyzed ortho-C-H acetoxylation of both hydrocinnamic and phenylacetic acids 2-R-3-R¹-4-R²C₆H₂CH(R³)CH₂C(O)OH (R = H, Me, Cl, OCF₃, etc.; R¹ = Me, Br, CF₃, etc.; R² = Me, F, COOMe, etc.; R³ = H, Me, Et)/2-R⁴-3-R⁵-4-R⁶-5-R⁷C₆HC(R⁸)(R⁹)C(O)OH (R⁴ = H, Me, I, etc.; R⁵ = H, OMe, CF₃, etc.; R⁶ = F, OMe, COOMe, etc.; R⁷ = R⁸ = R⁸ = H, Me) that can be found in many biol. active mols. as the key moieties was reported. Based on the broad scope and the application potential showcased with drug mols., such as (ibuprofen, ketoprofen, and flurbiprofen) it is anticipated that this C-H acetoxylation reaction will find attractive applicability in future synthetic endeavors.

Chemical Communications (Cambridge, United Kingdom) 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 C7H5Br2F, Category: catalysis-chemistry.

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

Ma, Xufeng published the artcileMixed Alkyl/Aryl Diphos Ligands for Iron-Catalyzed Negishi and Kumada Cross Coupling Towards the Synthesis of Diarylmethane, COA of Formula: C14H14, the publication is ChemCatChem (2021), 13(24), 5134-5140, database is CAplus.

Mixed alkyl/aryl diphos ligands have been prepared and their application in iron-catalyzed cross coupling of benzylic chlorides with diaryl zinc (Negishi) or aryl Grignard reagents (Kumada) towards the synthesis of diarylmethane has been evaluated. The iron-diphos catalytic system exhibited the enhanced activity and selectivity in the two coupling reactions. The electron-rich mixed PPh₂/PCy₂ ligands outperformed their sym. PPh₂ congeners, and led to decreased homocoupling byproduct formation. It indicates that the electronic effect of the ligands plays an important role in the catalytic performance. The Fe catalyst bearing an electron-rich PCy₂ substituent and a sterically demanding tert-Bu on ethene backbone exhibited the best catalytic performance and good functional group tolerance in the two cross coupling reactions.

ChemCatChem published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, COA of Formula: C14H14.

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

Xia, Hongyu published the artcileVisible Light Induced Aerobic Coupling of Arylboronic Acids Promoted by Hydrazone, Quality Control of 613-33-2, the publication is Advanced Synthesis & Catalysis (2022), 364(5), 922-929, database is CAplus.

A visible-light-induced oxidative coupling of arylboronic acids was developed for the synthesis of biaryls Ar¹Ar² [Ar¹ = Ar² = Ph, 4-MeC₆H₄, 4-FC₆H₄, etc.; Ar¹ = 4-BrC₆H₄, 4-MeC₆H₄, 4-FC₆H₄, etc.; Ar₂ = 4-H(O)CC₆H₄, 3-MeOC₆H₄, 4-AcC₆H₄, etc.]. The reaction that employed polydentate hydrazones as the bifunctional catalyst works smoothly under room temperature It was compatible with a wide range of functional group. The study of UV-Vis spectrum indicated that hydrazone and its complex with CuI show major absorptions upon visible-light, which secures the dual role of hydrazone as both ligand and photocatalyst in this reaction. Hence, the reaction was proposed to involve stepwise transmetallations, photo-induced oxidations, and reductive elimination.

Advanced Synthesis & Catalysis published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C5H7N3O, Quality Control of 613-33-2.

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