Category: 576-83-0

Wu, Zhu; Nitsch, Joern; Schuster, Julia; Friedrich, Alexandra; Edkins, Katharina; Loebnitz, Marcel; Dinkelbach, Fabian; Stepanenko, Vladimir; Wuerthner, Frank; Marian, Christel M.; Ji, Lei; Marder, Todd B. published the artcile< Persistent Room Temperature Phosphorescence from Triarylboranes: A Combined Experimental and Theoretical Study>, Recommanded Product: 2,4,6-Trimethylbromobenzene, the main research area is triarylborane mol structure phosphorescence room temperature DFT; AIE; El-Sayed’s rule; RTP; boron; non-radiative transition.

Achieving highly efficient phosphorescence in purely organic luminophors at room temperature remains a major challenge due to slow intersystem crossing (ISC) rates in combination with effective non-radiative processes in those systems. Most room temperature phosphorescent (RTP) organic materials have O- or N-lone pairs leading to low lying (n, π*) and (π, π*) excited states which accelerate kisc through El-Sayed’s rule. Herein, it is reported the first persistent RTP with lifetimes up to 0.5 s from simple triarylboranes which have no lone pairs. RTP is only observed in the crystalline state and in highly doped PMMA films which are indicative of aggregation induced emission (AIE). Detailed crystal structure anal. suggested that intermol. interactions are important for efficient RTP. Furthermore, photophys. studies of the isolated mols. in a frozen glass, in combination with DFT/MRCI calculations, show that (σ, B p)→(π, B p) transitions accelerate the ISC process. This work provides a new approach for the design of RTP materials without (n, π*) transitions.

Angewandte Chemie, International Edition published new progress about Crystal structure. 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

Huang, Liangbin; Ackerman, Laura K. G.; Kang, Kai; Parsons, Astrid M.; Weix, Daniel J. published the artcile< LiCl-Accelerated Multimetallic Cross-Coupling of Aryl Chlorides with Aryl Triflates>, Electric Literature of 576-83-0, the main research area is aryl chloride triflate palladium nickel zinc lithium chloride; biaryl preparation; palladium nickel coupling catalyst; zinc reducing agent; lithium chloride promoter.

While the synthesis of biaryls has advanced rapidly in the past decades, cross-Ullman couplings of aryl chlorides, the most abundant aryl electrophiles, have remained elusive. Reported here is a general cross-Ullman coupling of aryl chlorides with aryl triflates. The selectivity challenge associated with coupling an inert electrophile with a reactive one is overcome using a multimetallic strategy with the appropriate choice of additive. Studies demonstrate that LiCl is essential for effective cross-coupling by accelerating the reduction of Ni(II) to Ni(0) and counteracting autoinhibition of reduction at Zn(0) by Zn(II) salts. The modified conditions tolerate a variety of functional groups on either coupling partner (42 examples), and examples include a three-step synthesis of flurbiprofen.

Journal of the American Chemical Society published new progress about Aryl chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Electric Literature of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

MacNeil, Connor S.; Hsiang, Shou-Jen; Hayes, Paul G. published the artcile< Reversible dehydrogenation of a primary aryl borane>, Application In Synthesis of 576-83-0, the main research area is mesitylborane cleavage boron hydrogen bond phosphiniminepyrrolyl rhodium pincer complex; crystal structure phosphiniminepyrrolyl rhodium aminoborylene pincer complex; mol structure phosphiniminepyrrolyl rhodium aminoborylene pincer complex.

The consecutive activation of B-H bonds in mesitylborane (H2BMes; Mes = 2,4,6-Me3C6H2) by a 16-electron Rh(I) monocarbonyl complex, (iPrNNN)Rh(CO) (1-CO; iPrNNN = 2,5-[iPr2P:N(4-iPrC6H4)]2N(C4H2)-) is described. Dehydrogenative extrusion of the {BMes} fragment gave (iPrNNN)(CO)RhBMes (1-BMes). Addition of H2 gas to 1-BMes regenerated 1-CO and H2BMes, highlighting the ability of 1-CO to facilitate interconversion of {BMes} with dihydrogen. Reactivity studies revealed that 1-BMes promotes formal group transfer and that {BAr} fragments accessed by dehydrogenation are reactive entities.

Chemical Communications (Cambridge, United Kingdom) published new progress about Bond cleavage (boron-hydrogen). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Application In Synthesis of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Watson, Ian C.; Schumann, Andre; Yu, Haoyang; Davy, Emma C.; McDonald, Robert; Ferguson, Michael J.; Hering-Junghans, Christian; Rivard, Eric published the artcile< N-Heterocyclic Olefin-Ligated Palladium(II) Complexes as Pre-Catalysts for Buchwald-Hartwig Aminations>, Application In Synthesis of 576-83-0, the main research area is amination catalyst Buchwald Hartwig palladium N heterocyclic olefin complex; metalation alkylideneimidazole preparation palladium N heterocyclic olefin complex; crystal structure palladium N heterocyclic olefin alkylideneimidazole complex; mol structure palladium N heterocyclic olefin alkylideneimidazole complex; Buchwald-Hartwig amination; N-heterocyclic olefins; Pd complexes; heterogeneous catalysis; nanoparticle catalysis; palladium.

New N-heterocyclic olefins (NHOs) are described with functionalization on the ligand heterocyclic backbone and terminal alkylidene positions. Various PdII-NHO complexes I (Ar = 2,6-iPr2C6H3; L = 3-chloropyridine; R = Me, RR =9,10-acenaphthylenediyl) and were prepared by cleavage of chloro-bridged dimers (I-L)2 with pyridine ligand; the complexes were evaluated as pre-catalysts in Buchwald-Hartwig aminations. Vinylogous complex [(Me2Dipp2Im-2-CH:CHCH2Pd)Cl2L] (13) was prepared by palladation of 1,3-Dipp2-4,5-dimethyl-2-(2-propenylidene)imidazoline. The most active system for catalytic C-N bond formation between hindered arylamine and haloarene substrates was accessed by combining a backbone methylated NHO with [Pd(cinnamyl)Cl]2 in the presence of NaOtBu as a base. In these active systems evidence suggests that catalysis is mediated by colloidal palladium metal, highlighting a different coordination ability of NHOs in comparison with commonly used N-heterocyclic carbene co-ligands.

Chemistry – A European Journal published new progress about Alkenes, transition metal complexes Role: CAT (Catalyst Use), PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), USES (Uses), PROC (Process), RACT (Reactant or Reagent), PREP (Preparation). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Application In Synthesis of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Rettig, Irving D.; Van, Jackson; Brauer, Jacob B.; Luo, Wentai; McCormick, Theresa M. published the artcile< Tellurorhodamine photocatalyzed aerobic oxidation of organo-silanes and phosphines by visible-light>, HPLC of Formula: 576-83-0, the main research area is tellurorhodamine preparation photocatalyst aerobic oxidation organo silane phosphine visible; mesityl bisdimethylamino telluroxanthylium hexafluorophosphate preparation photocatalyst aerobic oxidation kinetics.

Tellurorhodamine, 9-mesityl-3,6-bis(dimethylamino)telluroxanthylium hexafluorophosphate (1), photocatalytically oxidizes aromatic and aliphatic silanes and tri-Ph phosphine under mild aerobic conditions. Under irradiation with visible light, 1 can react with self-sensitized 1O2 to generate the active telluroxide oxidant (2). Silanes are oxidized to silanols and tri-Ph phosphine is oxidized to tri-Ph phoshine oxide either using 2, or 1 with aerobic irradiation Kinetic experiments coupled with a computational study elucidate possible mechanisms of oxidation for both silane and phosphine substrates. First-order rates were observed in the oxidation of tri-Ph phosphine and methyldiphenyl silane, indicating a substitution like mechanism for substrate binding to the oxidized tellurium(IV). Addnl., these reactions exhibited a rate-dependence on water. Oxidations were typically run in 50 : 50 water/methanol, however, the absence of water decreased the rates of silane oxidation to a greater degree than tri-Ph phosphine oxidation Parallel results were observed in solvent kinetic isotope experiments using D2O in the solvent mixture The rates of oxidation were slowed to a greater degree in silane oxidation by 2 (kH/kD = 17.30) than for phosphine (kH/kD = 6.20). Various silanes and tri-Ph phosphine were photocatalytically oxidized with 1 (5%) under irradiation with warm white LEDs using atm. oxygen as the terminal oxidant.

Dalton Transactions published new progress about Oxidation kinetics. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, HPLC of Formula: 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Strekalova, Sofia; Kononov, Alexander; Rizvanov, Ildar; Budnikova, Yulia published the artcile< Acetonitrile and benzonitrile as versatile amino sources in copper-catalyzed mild electrochemical C-H amidation reactions>, Formula: C9H11Br, the main research area is acetamide preparation; benzene benzonitrile acetonitrile carbon hydrogen amidation copper catalyst electrochem.

A mild, efficient electrochem. approach to the site-selective direct C-H amidation of benzene and its derivatives with acetonitrile and benzonitrile to form amides RNC(O)R1 [R = Ph, 2-BrC6H4, Bn, etc.; R1 = Me, Ph] was developed. It has been shown that joint electrochem. oxidation of various arenes in the presence of a copper salt as a catalyst and nitriles leads to the formation of N-phenylacetamide from benzene and N-benzylacetamides from benzyl derivatives (up to 78% yield). A favorable feature of the process was mild conditions (room temperature, ambient pressure, no strong oxidants) that meet the criteria of green chem.

RSC Advances published new progress about Acetamides Role: SPN (Synthetic Preparation), PREP (Preparation). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Formula: C9H11Br.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Boontiem, Phongsakorn; Kiatisevi, Supavadee published the artcile< Facile and economical Miyaura borylation and one-pot Suzuki-Miyaura cross-coupling reaction>, Related Products of 576-83-0, the main research area is biaryl preparation green chem; aryl bromide arylpinacol ester Miyaura borylation Suzuki coupling.

Facile and economical method for Miyaura borylation reaction between B2pin2 and aryl bromides is reported. The catalytic system containing 2 mol% PdCl2(PPh3)2 and KOAc serves to enable borylations to occur under solvent-free and atm. conditions. The developed protocol can be applied to synthesize sym. and unsym. biaryls via one-pot two-step Suzuki-Miyaura cross-coupling reaction and also offers the up-scalability.

Inorganica Chimica Acta published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Related Products of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Tanaka, Yuki; Fukui, Norihito; Shinokubo, Hiroshi published the artcile< As-Indaceno[3,2,1,8,7,6-ghijklm]terrylene as a near-infrared absorbing C70-fragment>, Application In Synthesis of 576-83-0, the main research area is indacenoterrylene preparation antiaromaticity crystal structure.

Carbon and hydrogen are fundamental components of organic mols. and a fascinating plethora of functions can be generated using these two elements. Yet, realizing attractive electronic structures only by using carbon and hydrogen remains challenging. Herein, we report the synthesis and properties of the C70 fragment as-indaceno[3,2,1,8,7,6-ghijklm]terrylene, which exhibits near-IR (NIR) absorption (up to ca. 1300 nm), even though this mol. consists of only 34 carbon and 14 hydrogen atoms. A remarkably small HOMO-LUMO gap is confirmed by electrochem. measurement and theor. calculations Furthermore, as-indacenoterrylene is stable despite the absence of peripheral substituents, which contrasts with the cases of other NIR-absorbing hydrocarbons such as diradicaloids and antiarom. mols. The results of this study thus offer fundamental insights into the design of hydrocarbons with a small band gap.

Nature Communications published new progress about Activation enthalpy. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Application In Synthesis of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Majumder, Adhir; Naskar, Rajat; Phukan, Shankab J.; Maity, Ramananda published the artcile< Bimetallic PdII complexes with NHC/Py/PCy3 donor set ligands: applications in α-arylation, Suzuki-Miyaura and Sonogashira coupling reactions>, Quality Control of 576-83-0, the main research area is palladium binuclear imidazolylidene pyridine tricyclohexylphosphine complex preparation catalyst; Suzuki Sonogashira coupling catalyst palladium binuclear imidazolylidene tricyclohexylphosphine complex; alpha arylation oxindole catalyst palladium binuclear imidazolylidene tricyclohexylphosphine complex; crystal mol structure palladium binuclear imidazolylidene pyridine tricyclohexylphosphine complex.

Palladium binuclear NHC-pyridine and NHC-tricyclohexylphosphine complexes Me2C6H2-1,4-(MeImPdI2L)2 (2-5; MeIm = 3-methyl-1-imidazolyl-2-ylidene; L = 3-ClPy, 4-ClPy, 4-MeOPy, PCy3) were prepared and evaluated as catalysts for α-arylation of oxindole, Sonogashira coupling of PhCCH and Suzuki coupling of 3-bromo- and 4-bromobenzaldehyde with arylboronic acids. Bimetallic complexes bearing NHC donor ligands are gaining immense popularity as catalysts in organometallic chem. However, such complexes with a mixed NHC/PR3 donor set ligands are still rare. We present here a series of bimetallic PdII complexes featuring mixed NHC/Py/PCy3 donor set ligands applied in α-arylation of amide, Suzuki-Miyaura coupling and Sonogashira coupling reactions. All complexes have been characterized using standard characterization techniques and one of the complexes has been structurally characterized by X-ray crystallog. anal. Catalytic outcomes clearly indicate the superior activity of PdII complex bearing mixed NHC/PCy3 donor set ligands compared to the PEPPSI-type complexes in both α-arylation of amide and Sonogashira coupling reactions, though almost similar activities were observed for all the complexes in Suzuki-Miyaura coupling reactions. This observation might be due to the involvement of Pd-NPs as an active catalyst in Suzuki-Miyaura coupling reactions, whereas the Hg-poison test suggested the homogeneous nature of the other two types of reactions. Two pyridine rings in a mixed NHC/4-OMe(Py) donor complex are oriented almost in a parallel face-to-face fashion with a centroid to centroid separation of 3.758 Å, indicating π···π interactions between two methoxypyridine rings. This interaction leads to a very short Pd···Pd distance of 5.754 Å in the aforementioned complex.

New Journal of Chemistry published new progress about Alkynes, aryl Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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