Category: 613-33-2

Liu, Fangfei published the artcileTannic Acid: A green and efficient stabilizer of Au, Ag, Cu and Pd nanoparticles for the 4-Nitrophenol Reduction, Suzuki-Miyaura coupling reactions and click reactions in aqueous solution, Related Products of catalysis-chemistry, the publication is Journal of Colloid and Interface Science (2021), 281-291, database is CAplus and MEDLINE.

Due to the good elec., optical, magnetic, catalytic properties, transition metal nanoparticles (TMNPs) have been becoming more and more interesting in the fileds of environment, material, biomedicine, catalysis, and so on. Here, tannic acid (TA) is used as a green and efficient stabilizer to fabricate all kinds of TMNPs including AuNPs, AgNPs, CuNPs, and PdNPs. These TMNPs possess small sizes ranging from 1 nm to 6 nm, which is conducive to several catalytic reactions in aqueous solution, such as 4-nitrophenol (4-NP) reduction, CuAAC reactions and Suzuki-Miyaura coupling reactions. AuNPs and PdNPs are found to have distinctly higher catalytic activities than AgNPs and CuNPs in the 4-NP reduction process. Especially, PdNPs show the highest catalytic activities with TOF up to 7200 h^-1 in the 4-NP reduction Furthermore, PdNPs also exhibit satisfying catalytic performance in the Suzuki-Miyaura coupling process, and CuNPs are catalytically active in the copper-catalyzed azide alkyne cycloaddition (CuAAC) reactions. The applicability and generality of PdNPs and CuNPs are resp. confirmed via the reaction between different substrates in the Suzuki-Miyaura coupling reactions and the CuAAC reactions. This work present a simple, fast, green and efficient strategy to synthesize TMNPs for multiple catalysis.

Journal of Colloid and Interface Science 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, Related Products of catalysis-chemistry.

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

Ramineni, Kishore published the artcileSynchronized C-H Activations at Proximate Dinuclear Pd²⁺ Sites on Silicotungstate for Oxidative C-C Coupling, Formula: C14H14, the publication is ACS Catalysis (2021), 11(6), 3455-3465, database is CAplus.

Carbon-carbon (C-C) coupling is critically important in organic synthesis. Direct C-C coupling to replace two C-H bonds is preferred over coupling of two prefunctionalized C-intermediates but is synthetically challenging. While such coupling is feasible through homogeneous catalysis, the mechanism regarding how the two C-H bonds are activated and coupled by heterogeneous active metal atoms remains not well understood. This work demonstrates the need for a proximate metal-metal dimer site to facilitate heterogeneously catalyzed C-C coupling reactions. We demonstrate that dinuclear Pd²⁺ sites in (Pd²⁺)₂-silicotungstate (Pd₂ST) catalyzed oxidative C-C coupling of 2-methylfuran by O₂ through synchronized double C-H activations under ambient conditions, selectively producing 5,5′-dimethyl-2,2′-bifuran (DMBF). Mononuclear Pd²⁺ ions in Pd₁H₂ST and H₄ST are not active. The ¹³C NMR and DRIFT spectroscopies of adsorbed ¹³CO, combined with DFT and theor. ¹³C NMR calculations, determined that dinuclear Pd²⁺ ions are separated by ~3.5 ? on Pd₂ST and 3.1 ? in the Pd²⁺-C(=O)-Pd²⁺ complex. XRD and TEM are used to confirm that the most active Pd₂ST/SiO₂ catalyst has near monolayer dispersion. ²⁹Si MAS NMR is used to confirm the presence of the silicotungstate structure after calcination. The original silicotungstate Keggin structure is maintained after the Pd₂ST/SiO₂ is calcined.

ACS 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 C14H14, Formula: C14H14.

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

Zhang, Jin published the artcileAn air-stable, well-defined palladium-BIAN-NHC chloro dimer: a fast-activating, highly efficient catalyst for cross-coupling, Computed Properties of 613-33-2, the publication is Chemical Communications (Cambridge, United Kingdom) (2022), 58(53), 7404-7407, database is CAplus and MEDLINE.

Authors report the synthesis, characterization and reactivity of an air-stable, well-defined acenaphthoimidazolylidene palladium-BIAN-NHC chloro dimer complex, [Pd(BIAN-IPr)(¦Ì-Cl)Cl]₂. This rapidly activating catalyst merges the reactive properties of palladium chloro dimers, [Pd(NHC)(¦Ì-Cl)Cl]₂, with the attractive structural features of the BIAN framework. [Pd(BIAN-IPr)(¦Ì-Cl)Cl]₂ is the most reactive Pd(II)-NHC precatalyst discovered to date undergoing fast activation under both an inert atm. and aerobic conditions. The catalyst features bulky-yet-flexible sterics that render the C-H substituents closer to the metal center in combination with rapid dissociation to monomers and strong ¦Ò-donor properties. [Pd(BIAN-IPr)(¦Ì-Cl)Cl]₂ should be considered as a catalyst for reactions using well-defined Pd(II)-NHCs.

Chemical Communications (Cambridge, United Kingdom) 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 C20H40O2, Computed Properties of 613-33-2.

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

Sun, Longjiang published the artcileEfficient Suzuki-Miyaura cross-coupling reaction by loading trace Pd nanoparticles onto copper-complex-derived Cu/C-700 solid support, HPLC of Formula: 613-33-2, the publication is Journal of Colloid and Interface Science (2022), 608(Part_3), 2463-2471, database is CAplus and MEDLINE.

The development of efficient carbon-carbon cross-coupling catalysts with low noble metal amounts attracts much attention recently. Herein, a Cu/C-700/Pd nanocomposite is obtained by loading trace Pd²⁺ onto carbon support derived from a novel mononuclear copper complex, {[Cu(POP)₂(Phen)₂]BF₄}. The as-prepared nanomaterial features the facial structure of highly dispersed copper phosphide nanoparticles as well as Pd nanoparticles via neighboring Cu-Pd sites. The Cu/C-700/Pd nanocomposite shows excellent catalytic activity (99.73%) and selectivity in Suzuki-Miyaura cross-coupling reaction, at trace Pd loading (0.43 mol%). Compared with the reported palladium nano catalysts, its advantages are proved. The appealing gateway to this stable, innovative and recyclability, Cu/C-700/Pd nanostructure recommends its beneficial utilization in carbon-carbon coupling and other environmentally friendly processes.

Journal of Colloid and Interface Science 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 C6H12N2O, HPLC of Formula: 613-33-2.

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

Liu, Lu published the artcileMn(III)-Mediated Radical Cyclization of o-Alkenyl Aromatic Isocyanides with Boronic Acids: Access to N-Unprotected 2-Aryl-3-cyanoindoles, Application In Synthesis of 613-33-2, the publication is Organic Letters (2021), 23(15), 5826-5830, database is CAplus and MEDLINE.

The synthesis of N-unprotected 2-aryl-3-cyanoindoles was realized via the Mn(III)-mediated radical cascade cyclization of o-alkenyl aromatic isocyanides with boronic acids. A possible mechanism involving a sequential intermol. radical addition, intramol. cyclization, and cleavage of the C-C bond under mild reaction conditions is proposed. Mechanism studies show that H₂O or O₂ might provide the oxygen source for the elimination of benzaldehyde.

Organic Letters 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, Application In Synthesis of 613-33-2.

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

Zeng, Xiao-Xiao published the artcilePd-NHCs Enabled Suzuki-Miyaura Cross-Coupling of Arylhydrazines via C-N Bond Cleavage, HPLC of Formula: 613-33-2, the publication is Journal of Organometallic Chemistry (2021), 121749, database is CAplus.

Author describe a highly efficient protocol for cross-coupling of phenylhydrazines with arylboronic acids by Pd-NHCs under aerobic reaction condition. A series of well-defined Pd-NHCs complexes were evaluated and the relationship between the structure and the catalytic properties was investigated. It was disclosed that the Pd-PEPPSI-IPr proved to be the robust precatalyst, providing access to a range of (hetero)biaryls in good to excellent yields.

Journal of Organometallic Chemistry 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 C11H19BO2S, HPLC of Formula: 613-33-2.

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

Yuan, Pei published the artcileEffects of pore size, mesostructure and aluminum modification on FDU-12 supported NiMo catalysts for hydrodesulfurization, Product Details of C14H14, the publication is Petroleum Science (2020), 17(6), 1737-1751, database is CAplus.

A series of NiMo/FDU-12 catalysts with tunable pore diameters and mesostructures have been controllably synthesized by adjusting the synthetic hydrothermal temperature and applied for the hydrodesulfurization of dibenzothiophene and its derivative The state-of-the-art electron tomog. revealed that the pore sizes of FDU-12 supports were enlarged with the increase in the hydrothermal temperature and the mesostructures were transformed from ordered cage-type pores to locally disordered channels. Meanwhile, the MoS₂ morphol. altered from small straight bar to semibending arc to spherical shape and finally to larger straight bar with the change of support structures. Among them, FDU-12 hydrothermally treated at 150¡ãC possessed appropriate pore diameter and connected pore structure and was favorable for the formation of highly active MoS₂ with curved morphol.; thus, its corresponding catalyst exhibited the best HDS activity. Furthermore, it was indicated that the isomerization pathway could be significantly improved for HDS of 4,6-dimethyldibenzothiophene after the addition of aluminum, which was expected to be applied to the removal of the macromol. sulfur compounds Our study sheds lights on the relationship between support effect, active sites morphol. and HDS performance, and also provides a guidance for the development of highly active HDS catalysts.

Petroleum Science 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 C26H26N4O7, Product Details of C14H14.

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

Zhang, Dejiang published the artcileNickel- and Palladium-Catalyzed Cross-Coupling Reactions of Organostibines with Organoboronic Acids, Recommanded Product: 4,4′-Dimethyldiphenyl, the publication is Angewandte Chemie, International Edition (2021), 60(6), 3104-3114, database is CAplus and MEDLINE.

A strategy for the formation of antimony-carbon bond was developed by nickel-catalyzed cross-coupling of halostibines. This method has been applied to the synthesis of various triaryl- and diarylalkylstibines from the corresponding cyclic and acyclic halostibines. This protocol showed a wide substrate scope (72 examples) and was compatible to a wide range of functional groups such as aldehyde, ketone, alkene, alkyne, haloarenes (F, Cl, Br, I), and heteroarenes. A successful synthesis of one arylated stibine in a scale of 34.77 g demonstrates high synthetic potential of this transformation. The formed stibines (R₃Sb) were then used for the palladium-catalyzed carbon-carbon bond forming reaction with aryl boronic acids [R-B(OH)₂], giving biaryls with high selectivity, even the structures of two organomoieties (R and R’) are very similar. Plausible catalytic pathways were proposed based on control experiments

Angewandte Chemie, International Edition 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 C9H12O, Recommanded Product: 4,4′-Dimethyldiphenyl.

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

Appa, Rama Moorthy published the artcilePd-catalyzed oxidative homocoupling of arylboronic acids in WEPA: A sustainable access to symmetrical biaryls under added base and ligand-free ambient conditions, Name: 4,4′-Dimethyldiphenyl, the publication is Molecular Catalysis (2021), 111366, database is CAplus.

A quick and eco-friendly protocol for the synthesis of biaryls, e.g., I by an oxidative (aerobic) homocoupling of arylboronic acids RB(OH)₂ (R = C₆H₅, pyridin-2-yl, 2-thienyl, etc.) using Pd(OAc)₂ in water extract of pomogranate ash (WEPA) as an efficient agro-waste(bio)-derived aqueous (basic) media is described. The reactions were executed at ambient aerobic conditions in the absence of external base and ligand to result sym. biaryls in excellent yields. The use of renewable media with an effective exploitation of waste, short reaction times, excellent yields of products, easy separation of the products, unnecessating the external base, oxidant, ligand or volatile organic solvents and ambient reaction conditions are the vital insights of the present protocol.

Molecular 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 C14H14, Name: 4,4′-Dimethyldiphenyl.

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

Sakaguchi, Tomoya published the artcileSimple Modifications for the Facile Preparation of 1,1,2,3,4,4-Hexaaryl-1,3-butadienes, Computed Properties of 613-33-2, the publication is Helvetica Chimica Acta (2022), 105(2), e202100232, database is CAplus.

In this reaction system, the insertion of alkynes into the palladium-carbon bond was accelerated by changing the palladium intermediate to the cationic one. When silver nitrate was used, the reaction of diarylalkynes with arylboronic acids took place smoothly under mild reaction conditions without any ligand to give the coupling diene products in excellent yields. On the contrary, the reaction hardly proceeded with silver oxide and silver carbonate. Poly(hexaphenyl-1,3-butadiene) (PHB) with a similar mol. weight to the previously prepared one was also synthesized from the reaction of diphenylacetylene with phenyldiboronic acid under mild reaction conditions.

Helvetica Chimica Acta 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, Computed Properties of 613-33-2.

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