Month: October 2022

Muraoka, Takako; Ishii, Yasuhisa; Siti, Nursaliha; Nasu, Masahiro; Wahida, Nurul Ain; Ueno, Keiji published the artcile< Syntheses and Structures of Gallyliron Complexes with Pyridine Ligands and Their Reactions with Methyl Acrylate>, Recommanded Product: 2,4,6-Trimethylbromobenzene, the main research area is photolysis dichloro gallyl iron complex pyridine; crystal structure mol gallium iron pyridine complex preparation; gallyl iron pyridine complex preparation coordinative substitution methyl acrylate.

Reactions of gallyliron complexes Cp*(OC)2FeGaR2 (R = Cl (1), Mes (2); Cp*, η5-C5Me5; Mes, 2,4,6-Me3C6H2) with pyridine in C6D6 afforded pyridine-stabilized gallyl complexes Cp*(OC)2Fe{GaR2(py)} (R = Cl (3), Mes (5a); py, pyridine). Photoirradiation of dichlorogallyl complex 3 in the presence of excess pyridine in benzene proceeded via the substitution of a CO ligand with another pyridine to give Cp*(OC)(py)Fe{GaCl2(py)} (4). However, photoirradiation of dimesitylgallyl complex 2 in the presence of excess pyridine gave gallane(pyridyl)iron complex Cp*(OC)Fe{(η1-HGaMes2)(η1-2-C5H4N)} (6a) via CO elimination and oxidative addition of the C-H bond at the 2-position of the gallium-coordinated pyridine. X-ray crystal structure anal. of 6a revealed the formation of a 3-center-2-electron (3c2e) bond in the Fe-H-GaMes2 fragment. Reaction of 4 with Me acrylate in toluene at 50°C resulted in substitution of the pyridine ligand on the iron atom with the C:C bond, giving Cp*(OC)(η2-CH2:CHCO2Me)Fe{GaCl2(py)} (7). In contrast, the reaction of 6a with Me acrylate in toluene at 100°C afforded vinyl iron complex Cp*(OC)2Fe(CH:CH2) (8) and 4-membered Ga2O2 cyclic gallane compound [Mes2GaOMe]2 (9) via cleavage of the Fe-Ga, C-O, and C-C bonds.

Organometallics published new progress about Bond cleavage. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Recommanded Product: 2,4,6-Trimethylbromobenzene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hahn, G.; Kunnas, P.; de Jonge, N.; Kempe, R. published the artcile< General synthesis of primary amines via reductive amination employing a reusable nickel catalyst>, Electric Literature of 3959-07-7, the main research area is gamma alumina supported nickel salen complex nanocatalyst preparation reusable; amine hydrochloride preparation; primary amine preparation hydrochloric acid salt formation; aldehyde ammonia reductive amination alumina supported nickel complex catalyst; ketone ammonia reductive amination alumina supported nickel complex catalyst.

A nanostructured nickel catalyst was reported for the general and selective synthesis of primary amines via reductive amination, employing ammonia dissolved in water. The catalyst, which operated at low temperature and pressure, was highly active, reusable and easy to handle. The synthesis from a specific nickel complex and γ-Al2O3 was straightforward, with the ligand-metal combination of this complex being crucial. Aldehydes (including purely aliphatic ones), aryl-alkyl, dialkyl and diaryl ketones could all be converted smoothly into primary amines. In addition, the amination of pharmaceuticals, bioactive compounds and natural products was demonstrated. Many functional groups-including hydrogenation-sensitive examples-were tolerated.

Nature Catalysis published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Electric Literature of 3959-07-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kubota, Koji; Endo, Tsubura; Uesugi, Minami; Hayashi, Yuta; Ito, Hajime published the artcile< Solid-State C-N Cross-Coupling Reactions with Carbazoles as Nitrogen Nucleophiles Using Mechanochemistry>, Product Details of C8H5BrS2, the main research area is arylcarbazole preparation; aryl halide arylcarbazole solid state cross coupling palladium catalyst; ball milling; carbazole; cross-coupling; mechanochemistry; solid-state reaction.

The palladium-catalyzed solid-state C-N cross-coupling of carbazoles with aryl halides via a high-temperature ball-milling technique was reported. This reaction allowed simple, fast, and efficient synthesis of N-arylcarbazole derivatives I [R1 = 4-MePh, 2-naphthyl, 9-pyrenyl, etc.; R2 = H, t-Bu, Ph, etc.] in good to excellent yields without the use of large amounts of organic solvents in air. Importantly, the developed solid-state coupling approach enabled the cross-coupling of poorly soluble aryl halides with large polyaromatic structures that are barely reactive under conventional solution-based conditions.

ChemSusChem published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 3480-11-3 belongs to class bromides-buliding-blocks, and the molecular formula is C8H5BrS2, Product Details of C8H5BrS2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Alaasar, Mohamed; Darweesh, Ahmed F.; Cai, Xiaoqian; Liu, Feng; Tschierske, Carsten published the artcile< Mirror Symmetry Breaking and Network Formation in Achiral Polycatenars with Thioether Tail>, Recommanded Product: 5-Bromo-2,2′-bithiophene, the main research area is alkylsulfanylbenzoyl oxyphenyl dithienylphenyl trialkoxybenzoate preparation thermal stability; bithophene; chirality; cubic phases; liquid crystals; mirror symmetry breaking; soft matter.

The design and mol. self-assembly of two series of rod-like achiral polycatenar mols. derived from a π-conjugated 5,5′-diphenyl-2,2′-bithiophene core with a fork-like triple alkoxylated end and a variable single alkylthio chain at the other end was discussed. In both series of liquid crystalline materials, differed in the chain length at the trialkoxylated end, helical self-assembly of the π-conjugated rods in networks occurs, leading to wide temperature ranges (>200 K) of bicontinuous cubic network phases, in some cases it stayed stable even around ambient temperatures The achiral bicontinuous cubic Ia3d phase (gyroid) was replaced upon alkylthio chain elongation by a spontaneous mirror symmetry broken bicontinuous cubic phase (I23) and a chiral isotropic liquid phase (Iso1[*]). Further chain elongation resulted in removing the I23 phase and the re-appearance of the Ia3d phase with different pitch lengths. In the second series an addnl. tetragonal phase separated the two cubic phase types.

Chemistry – A European Journal published new progress about Benzoates Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 3480-11-3 belongs to class bromides-buliding-blocks, and the molecular formula is C8H5BrS2, Recommanded Product: 5-Bromo-2,2′-bithiophene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Meazza, Marta; Tur, Fernando; Hammer, Niels; Jorgensen, Karl Anker published the artcile< Synergistic Diastereo- and Enantioselective Functionalization of Unactivated Alkyl Quinolines with α,β-Unsaturated Aldehydes>, Recommanded Product: 3-(4-Bromophenyl)acrylaldehyde, the main research area is quinoline stereoselective derivative preparation; alkylquinoline unsaturated aldehyde organocatalyst cyclization; asymmetric catalysis; heterocycles; indium; organocatalysis; synergistic catalysis.

An alkyl functionalization of unactivated alkyl quinolines has been developed combining InCl3 activation with organocatalytic activation of α,β-unsaturated aldehydes in a synergistic fashion. The reaction proceeds in a highly stereoselective manner as a sequence involving two consecutive synergistic catalytic cycles (Lewis acid- and iminium ion-catalyzed) and requires neither pre-activated alkyl quinoline substrates with electron-withdrawing substituents nor highly activated electrophiles. The reaction provides selectively double- or mono-addition products in good yields and high to excellent stereoselectivities. Furthermore, based on spectroscopic and labeling experiments, the mechanisms for the reactions are discussed.

Angewandte Chemie, International Edition published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Recommanded Product: 3-(4-Bromophenyl)acrylaldehyde.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Pelissier, C.; Alexandru, A. published the artcile< Resonance parameters of the rho-meson from asymmetrical lattices>, Quality Control of 82-73-5, the main research area is resonance parameter rho meson asym lattice QCD.

We present a lattice QCD calculation of the parameters of the ρ meson decay. The study is carried out on spatially asym. boxes using nHYP-smeared clover fermions with two mass-degenerate quark flavors. Our calculations are carried out at a pion mass mπ = 304(2) MeV on the set of lattices V = 242 × η24 × 48 with η = 1.0, 1.25, and 2.0 with lattice spacing a = 0.1255(7) fm. The resonance mass mρ = 827(3)(5) MeV and coupling constant gρππ = 6.67(42) are calculated using the P-wave scattering phase shifts. We construct a 2 × 2 correlation matrix to extract the energy of the scattering states and compute the phase shifts using the finite volume formula. By varying the degree of asymmetry, we are able to compute a set of phase shifts that are evenly distributed throughout the spectral region where the ρ decays.

Physical Review D: Particles, Fields, Gravitation, and Cosmology published new progress about Lattice QCD. 82-73-5 belongs to class bromides-buliding-blocks, and the molecular formula is C8H3BrO3, Quality Control of 82-73-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Shao, Wenhao; Jiang, Hanjie; Ansari, Ramin; Zimmerman, Paul M.; Kim, Jinsang published the artcile< Heavy atom oriented orbital angular momentum manipulation in metal-free organic phosphors>, Quality Control of 576-83-0, the main research area is metal free organic phosphor orbital angular momentum.

Metal-free purely organic phosphors (POPs) are emerging materials for display technologies, solid-state lighting, and chem. sensors. However, due to limitations in contemporary design strategies, the intrinsic spin-orbit coupling (SOC) efficiency of POPs remains low and their emission lifetime is pinned in the millisecond regime. Here, we present a design concept for POPs where the two main factors that control SOC-the heavy atom effect and orbital angular momentum-are tightly coupled to maximize SOC. This strategy is bolstered by novel natural-transition-orbital-based computational methods to visualize and quantify angular momentum descriptors for mol. design. To demonstrate the effectiveness of this strategy, prototype POPs were created having efficient room-temperature phosphorescence with lifetimes pushed below the millisecond regime, which were enabled by boosted SOC efficiencies beyond 102 cm-1 and achieved record-high efficiencies in POPs. Electronic structure anal. shows how discrete tuning of heavy atom effects and orbital angular momentum is possible within the proposed design strategy, leading to a strong degree of control over the resulting POP properties.

Chemical Science published new progress about Angular momentum, orbital. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Quality Control of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Xia; Ma, Xiaoming; Lang, Xianjun published the artcile< Blue light-powered hydroxynaphthoic acid-titanium dioxide photocatalysis for the selective aerobic oxidation of amines>, Formula: C7H8BrN, the main research area is hydroxynaphthoic acid titanium dioxide photocatalysis selective aerobic oxidation amine; Cooperative photocatalysis; Hydroxynaphthoic acid; Oxidation of amines; Photoredox-active ligand; Surface complexes.

Solar photocatalysis is the key to resolve many environmental challenges but is usually hard to achieve over a metal oxide semiconductor. Therefore, assembling π-conjugated mols. onto semiconductors becomes an efficient approach to solar conversion via ligand-to-metal charge transfer. Here, a rational design of ligands for titanium dioxide (TiO2) is presented to produce robust visible light photocatalysts. Three hydroxynaphthoic acids (HNAs) were selected as ligands by extending an extra benzene ring of salicylic acid (SA) at 3,4 or 4,5 or 5,6 positions. These ligands could regulate the performance of TiO2 in which 2-hydroxy-1-naphthoic acid (2H1NA) endows the best outcome. In detail, blue light-powered cooperative photocatalysis of 2H1NA-TiO2 with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO, 5 mol%) inaugurates the expeditious formation of imines by oxidation of amines with atm. oxygen (O2). Interestingly, the increase of the O2 pressure from 1 atm to 0.4 MPa promoted the selective oxidation of benzylamine but thereafter declined with a further boost to 0.6 MPa. Notably, an electron transfer between the oxidatively quenched 2H1NA-TiO2 and TEMPO is established, offering a new pathway for environmental applications. This work presents a strategy in designing cutting-edge visible light photocatalysts via altering semiconductors with surface ligands.

Journal of Colloid and Interface Science published new progress about Blue light. 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Formula: C7H8BrN.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yuan, Ling; Yuan, Gao-Qing published the artcile< Electrosynthesis of 1,3,5-trisubstituted 1,2,4-triazoles from phenylhydrazine, aldehydes and amines under mild conditions>, Safety of 4-Bromobenzylamine, the main research area is trisubstituted triazole preparation electrochem; phenylhydrazine aldehyde amine three component reaction.

A simple and convenient method for the electrosynthesis of 1,3,5-trisubstituted 1,2,4-triazoles with three components of phenylhydrazine, aldehydes and amines has been established. The electrolysis could be smoothly carried out at room temperature without addnl. strong oxidants and catalysts to afford the target product in good yields. This electrochem. route effectively extends synthetic field of 1,2,4-triazole derivatives

Tetrahedron published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Safety of 4-Bromobenzylamine.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Qi, Lin-Jun; Shi, Chong-Yang; Chen, Peng-Fei; Li, Long; Fang, Gang; Qian, Peng-Cheng; Deng, Chao; Zhou, Jin-Mei; Ye, Long-Wu published the artcile< Gold-Catalyzed 1,1-Carboalkoxylation of Oxetane-Ynamides via Exocyclic Metal Carbenes: Divergent and Atom-Economical Synthesis of Tricyclic N-Heterocycles>, SDS of cas: 20776-50-5, the main research area is tricyclic nitrogen heterocycle preparation; ynamide oxetane preparation carboxylation gold catalyst.

Here, an unprecedented gold-catalyzed 1,1-carboalkoxylation of ynamides I (R1 = H, 4-Br, 5-Cl, 4-OMe, etc.; R2 = Ph, Me, 2-thienyl, etc.; R3 = Ts, Ms, benzenesulfonyl, etc.) for the generation of exocyclic gold carbenes via exo-cyclization under room temp was reported. Subsequent 1,2-N-migration and 1,2-H-migration into the gold carbenes lead to the divergent and atom-economical synthesis of valuable tetrahydrofuran-fused 1,4-dihydroquinolines II (R1 = H, 8-Br, 7-Cl, 8-OMe, etc.) and furoindolines III (R4 = H, 5-Br, 6-F, 5-OMe, etc.; R5 = Me, Et, n-Pr, etc.). Moreover, the asym. synthesis of these tricyclic N-heterocycles e.g., IV can be achieved by a chirality-transfer strategy, and the possibility of enantioselective cyclization via chiral gold-catalyzed kinetic resolution also emerges. In addition, the mechanistic rationale for this 1,1-carboalkoxylation, in particular accounting for the distinct migration into gold carbenes, is also strongly supported by theor. calculations

ACS Catalysis published new progress about Alkoxycarbonylation. 20776-50-5 belongs to class bromides-buliding-blocks, and the molecular formula is C7H6BrNO2, SDS of cas: 20776-50-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary