Category: 576-83-0

Takebayashi, Satoshi; Iron, Mark A.; Feller, Moran; Rivada-Wheelaghan, Orestes; Leitus, Gregory; Diskin-Posner, Yael; Shimon, Linda J. W.; Avram, Liat; Carmieli, Raanan; Wolf, Sharon G.; Cohen-Ofri, Ilit; Sanguramath, Rajashekharayya A.; Shenhar, Roy; Eisen, Moris; Milstein, David published the artcile< Iron-catalyzed ring-opening metathesis polymerization of olefins and mechanistic studies>, Reference of 576-83-0, the main research area is mechanistic iron catalyzed ring opening metathesis polymerization olefin.

The olefin metathesis reaction is among the most widely applicable catalytic reactions for carbon-carbon double bond formation. Currently, Mo- and Ru-carbene catalysts are the most common choices for this reaction. It has been suggested that an iron-based catalyst would be a desirable economical and biocompatible substitute of the Ru catalysts; however, practical solutions in this regard are still lacking. Here, we report the discovery and mechanistic studies of three-coordinate iron(II) catalysts for ring-opening metathesis polymerization of olefins. Remarkably, their reactivity enabled the formation of polynorbornene with stereoregularity and high mol. weight (>107 g mol-1). The polymerization in the presence of styrene revealed cross metathesis reactivity with iron catalysts. Mechanistic studies suggest the possible role of metal-ligand cooperation in formation of the productive catalyst. This work opens the door to the development of iron complexes that can be economical and biocompatible catalysts for olefin metathesis reactions.

Nature Catalysis published new progress about Crystal structure. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Reference of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Lamola, Jairus L.; Moshapo, Paseka T.; Holzapfel, Cedric W.; Maumela, Munaka Christopher published the artcile< Evaluation of P-bridged biaryl phosphine ligands in palladium-catalyzed Suzuki-Miyaura cross-coupling reactions>, HPLC of Formula: 576-83-0, the main research area is phosphacyclic ligand preparation; biaryl preparation; aryl halide phenylboronic acid Suzuki Miyaura coupling palladium catalyst.

A family of biaryl phosphacyclic ligands derived from phobane and phosphatrioxa-adamantane frameworks was described. The rigid biaryl phosphacycles were efficient for synthesis of biaryls ArAr1 [Ar = 3-MeC6H4, 2-naphthyl, 2-thienyl, etc.; Ar1 = Ph, 2-MeC6H4, 2,6-di-MeC6H3] via palladium-catalyzed Suzuki-Miyaura cross-coupling of aryl bromides/chlorides with phenylboronic acids. In particular, coupling reactions of the challenging sterically hindered and heterocyclic substrates were viable at room temperature

RSC Advances published new progress about Aryl halides Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Jia, Xiangqing; Nitsch, Joern; Ji, Lei; Wu, Zhu; Friedrich, Alexandra; Kerner, Florian; Moos, Michael; Lambert, Christoph; Marder, Todd B. published the artcile< Triarylborane-Based Helical Donor-Acceptor Compounds: Synthesis, Photophysical, and Electronic Properties>, HPLC of Formula: 576-83-0, the main research area is triarylborane helicene donor acceptor compound fluorescence UV electrochem electronic; boron; charge transfer; fluorescence; helicenes; luminescent.

The synthesis and characterization of 10-(dimesitylboryl)-N,N-di-p-tolylbenzo[c]phenanthren-4-amine (3-B(Mes)2-[4]helix-9-N(p-Tol)2 1) and 13-(dimesitylboryl)-N,N-di-p-tolyldibenzo[c,g]phenanthren-8-amine (3-B(Mes)2-[5]helix-12-N(p-Tol)2 2) are reported herein. Their electrochem. and photophys. properties have been studied exptl. and theor. The donor and acceptor-substituted helicene derivatives exhibit moderate fluorescence quantum yields in THF (Φf=0.48 and 0.61 for 1 and 2, resp.), which are higher than unsubstituted ones (Φf=0.18 for [4]helicene; Φf<0.05 for [n]helicenes (n≥5)). In the solid state, the Φf values are higher (Φf=1.00 and 0.55 for 1 and 2, resp.) than those in solution, most likely due to the restrictions of mol. motions. The S1←S0 transitions of 1 and 2 are predominately HOMO→LUMO transitions. Upon excitation with UV light, the interplanar angle between the two terminal aryl rings of the [5]helix core of 2 decreases (S1 state compared with S0 state), which is similar to placing a spring under an external force. Chemistry - A European Journal published new progress about Band gap. 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

Le Coz, Erwann; Zhang, Ziyun; Roisnel, Thierry; Cavallo, Luigi; Falivene, Laura; Carpentier, Jean-Francois; Sarazin, Yann published the artcile< Barium-Catalysed Dehydrocoupling of Hydrosilanes and Borinic Acids: A Mechanistic Insight>, COA of Formula: C9H11Br, the main research area is barium catalyst dehydrocoupling mechanism kinetics hydrosilane borinic acid chemoselective; crystal structure mol barium toluene boryloxide complex preparation; alkaline earth metals; barium; borasiloxanes; density functional calculations; reaction mechanisms.

Two very rare cases of barium boryloxides, the homoleptic [Ba(OB{CH(SiMe3)2}2)2·C7H8] and the heteroleptic [{LONO4}BaOB{CH(SiMe3)2}2] stabilized by the multidentate aminoetherphenolate {LONO4}-, are presented, and their structural properties are discussed. The electron-deficient [Ba(OB{CH(SiMe3)2}2)2·C7H8] shows, in particular, resilient η6-coordination of the toluene mol. Together with its amido parents [Ba{N(SiMe3)2}2·thf2] and [Ba{N(SiMe3)2}2]2, this complex catalyzes the fast and chemoselective dehydrocoupling of borinic acids R2BOH and hydrosilanes HSiR’3, yielding borasiloxanes R2BOSiR’3 in a controlled fashion. The assessment of substrate scope indicates that, for now, the reaction is limited to bulky borinic acids. Kinetic anal. shows that the rate-limiting step of the catalytic manifold traverses a dinuclear transition state. A detailed mechanistic scenario is proposed on the basis of DFT computations, the results of which are fully consistent with exptl. data. It consists of a stepwise process with rate-determining nucleophilic attack of a metal-bound O-atom onto the incoming hydrosilane, involving throughout dinuclear catalytically active species.

Chemistry – A European Journal published new progress about Borinic acids 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, COA of Formula: C9H11Br.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Diaz-Sanchez, Miguel; Murgu, Roxana Nicoleta; Diaz-Garcia, Diana; Mendez-Arriaga, Jose M.; Prashar, Sanjiv; Urban, Bela; Pinkas, Jiri; Lamac, Martin; Horacek, Michal; Gomez-Ruiz, Santiago published the artcile< Synergistic Effect of Cu,F-Codoping of Titanium Dioxide for Multifunctional Catalytic and Photocatalytic Studies>, HPLC of Formula: 576-83-0, the main research area is copper fluorine titanium oxide catalytic photocatalytic activity.

Titanium dioxide nanomaterials with improved catalytic and photocatalytic properties through codoping with copper and fluorine are synthesized and contain optimal textural and compositional properties, which are not possible without doping or with a single doping of Cu or F sep. The codoped systems promote the generation of a synergistic effect increasing activity of the systems in photocatalytic processes of both potential environmental or energy interest. The photocatalysts show very effective degradations of industrial and emerging contaminants such as ciprofloxacin (80% degradation) and naproxen (72% degradation) using UV light (300 W) in short periods of up to 15 min. An addnl. doping of the Cu,F-containing nanomaterials with palladium nanoparticles, makes the systems active as heterogeneous catalysts in Suzuki-Miyaura C-C coupling reactions. Interestingly, the Cu,F-containing systems do not need the doping of Pd to be active in C-C coupling showing good conversions and modest yields of biphenyl derivatives Finally, Pd-doped systems are also successfully tested in the energy-related process of the photocatalytic dehalogenation-hydrogenation of different substrates, making these systems attractive for their potential future application in the dehalogenation of plastic or biomass wastes and for the preparation of solid or liquid fuels for cleaner energy generation.

Advanced Sustainable Systems published new progress about Adsorption. 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

Chen, Qiang; Baumgarten, Martin; Wagner, Manfred; Hu, Yunbin; Hou, Ian Cheng-Yi; Narita, Akimitsu; Muellen, Klaus published the artcile< Dicyclopentaannelated Hexa-peri-hexabenzocoronenes with a Singlet Biradical Ground State>, Related Products of 576-83-0, the main research area is dicyclopentaannelated hexa peri hexabenzocoronene preparation singlet biradical ground state; hexabenzocoronene low bandgap optical electrochem ESR DFT; dicyclopentaannelation; hexa-peri-hexabenzocoronene; low energy gap; not-fully benzenoid PAH; open-shell biradical.

Synthesis of two dicyclopentaannelated hexa-peri-hexabenzocoronene (PHBC) regioisomers was carried out, using nonplanar oligoaryl precursors with fluorenyl groups: mPHBC I with two pentagons in the “”meta””-configuration was obtained as a stable mol., while its structural isomer with the “”para””-configuration, pPHBC II, could be generated and characterized only in situ due to its high chem. reactivity. Both PHBCs exhibit low energy gaps, as reflected by UV-vis-NIR absorption and electrochem. measurements. They also show open-shell singlet ground states according to ESR (EPR) measurements and d. functional theory (DFT) calculations The use of fully benzenoid HBC as a bridging moiety leads to significant singlet biradical characters (y0) of 0.72 and 0.96 for mPHBC I and pPHBC II, resp., due to the strong rearomatization tendency of the HBC π-system; these values are among the highest for planar carbon-centered biradical mols. The incorporation of fully unsaturated pentagons strongly perturbs the aromaticity of the parent HBC and makes the constituted benzene rings less aromatic or antiarom. These results illustrate the high impact of cyclopentaannelation on the electronic structures of fully benzenoid polycyclic aromatic hydrocarbons (PAHs) and open up a new avenue towards open-shell PAHs with prominent singlet biradical characters.

Angewandte Chemie, International Edition published new progress about Biradicals Role: FMU (Formation, Unclassified), RCT (Reactant), FORM (Formation, Nonpreparative), 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

Strekalova, Sofia; Kononov, Alexander; Budnikova, Yulia published the artcile< Amino acids in electrochemical metal-free benzylic C-H amidation>, Recommanded Product: 2,4,6-Trimethylbromobenzene, the main research area is amide preparation; amino acid arene electrochem CH amidation.

This report described the mild electrochem. metal-, oxidant-, additive-free site-selective direct C-H amidation of benzyl C(sp3)-H bonds in an undivided cell using α-amino acids as a source of an amide bond moiety. Practically significant amides RCH2NHC(O)R1 [R = Ph, 3-MeC6H4, 4=BrC6H4; R1 = Me, i-Pr, Ph] were obtained under electrochem. mild one-pot conditions (without strong external oxidants, at room temperature), with total yields up to 73%. This electrochem. approach featured a functional selectivity and a broad scope of substrates with benzyl bond and different amino acids.

Tetrahedron Letters published new progress about Amidation. 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

Shan, Chao; Xu, Jinping; Cao, Liming; Liang, Chaoming; Cheng, Ruihua; Yao, Xiantong; Sun, Maolin; Ye, Jinxing published the artcile< Rapid Synthesis of α-Chiral Piperidines via a Highly Diastereoselective Continuous Flow Protocol>, Related Products of 576-83-0, the main research area is chiral piperidine preparation diastereoselective; butylsulfinyl imine Grignard reagent debromocyclization continuous flow.

A practical continuous flow protocol has been developed using readily accessible N-(tert-butylsulfinyl)-bromoimine and Grignard reagents, providing various functionalized piperidines (34 examples) in superior results (typically >80% yield and with >90:10 dr) within minutes. The high-performance scale-up is smoothly carried out, and efficient synthesis of the drug precursor further showcases its utility. This flow process offers rapid and scalable access to enantioenriched α-substituted piperidines.

Organic Letters published new progress about Cyclization (debromo-). 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

Lu, Ru-Qiang; Wu, Shuang; Yang, Lin-Lin; Gao, Wen-Bin; Qu, Hang; Wang, Xiao-Ye; Chen, Jun-Bo; Tang, Chun; Shi, Hai-Yan; Cao, Xiao-Yu published the artcile< Stable Diindeno-Fused Corannulene Regioisomers with Open-Shell Singlet Ground States and Large Diradical Characters>, Related Products of 576-83-0, the main research area is diindeno corannulene regioisomer singlet triplet diradical crystal structure; corannulene; macrocycles; polycycles; radicals; structure elucidation.

The synthesis of open-shell polycyclic hydrocarbons with large diradical characters is challenging because of their high reactivities. Herein, two diindeno-fused corannulene regioisomers DIC-1 and DIC-2, curved fragments of fullerene C104, were synthesized that exhibit open-shell singlet ground states. The incorporation of the curved and non-alternant corannulene moiety within diradical systems leads to significant diradical characters as high as 0.98 for DIC-1 and 0.89 for DIC-2. Such high diradical characters can presumably be ascribed to the re-aromatization of the corannulene π system. Although the DIC compounds have large diradical characters, they display excellent stability under ambient conditions. The half-lives are 37 days for DIC-1 and 6.6 days for DIC-2 in solution This work offers a new design strategy towards diradicaloids with large diradical characters yet maintain high stability.

Angewandte Chemie, International Edition published new progress about Acylation, regioselective. 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

Zhang, Jingjing; Yang, Jin-Dong; Cheng, Jin-Pei published the artcile< Exploiting the radical reactivity of diazaphosphinanes in hydrodehalogenations and cascade cyclizations>, Synthetic Route of 576-83-0, the main research area is arene preparation; aryl bromide hydrodehalogenation bis tertbutyl diazaphosphinane mediated; dihydro indene preparation chemoselective; bromide aryl cascade cyclization bis tertbutyl diazaphosphinane mediated.

Radical reactivity of diazaphosphinanes to implement hydrodehalogenations of aryl bromides and their cascade cyclization by hydride transfer was reported to give aromatic hydrocarbons R-H [R = Ph, 2-naphthyl, 4-MeOC6H4, etc.] and dihydro-indene derivatives I [X = NH, O, S]. These reactions featured a broad substrate scope, high efficiency and simplicity of manipulation. The radical reactivity of diazaphosphinanes disclosed here differed from their well-established hydridic reactivity and hence opened a new avenue for diazaphosphinane applications in organic syntheses.

Chemical Science published new progress about Aromatic hydrocarbons Role: SPN (Synthetic Preparation), PREP (Preparation). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Synthetic Route of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary