Category: 576-83-0

Horrer, Guenther; Krummenacher, Ivo; Mann, Sophie; Braunschweig, Holger; Radius, Udo published the artcile< N-Heterocyclic carbene and cyclic (alkyl)(amino)carbene complexes of vanadium(III) and vanadium(V)>, Category: bromides-buliding-blocks, the main research area is vanadium cAAC NHC complex preparation oxidation paramagnetism magnetic moment.

[VCl3(THF)3] offers a convenient entrance point into the chem. of carbene stabilized V(III) complexes. Herein we report the paramagnetic mono- and biscarbene complexes [VCl3(cAAC)] (1, cAAC = 1-Dipp-3,3,5,5-tetramethyl-2-pyrrolidinylidene), [VCl3(cAAC)(THF)] (1-thf), [VCl3(IMes)] (2), [{VCl2(IiPrMe)(μ-Cl)}2] (3, IiPrMe = 1,3-diisopropyl-4,5-dimethyl-2-imidazolylidene), [VCl3(IDipp)] (4) [VCl3(SIDipp)] (5), [VCl3(SIDipp)(THF)] (5-thf), [VCl3(ItBu)] (6, ItBu = 1,3-di-tert-butyl-2-imidazolylidene), [VCl3(cAAC)2] (7) and [VCl3(IiPrMe)2] (8). Reaction of 1 with MesMgCl, MesLi and LiNPh2 afforded the complexes [VCl2(Mes)(cAACMe)] (9), [cAAC-H]+[VCl2Mes2]- (10) and [VCl2(NPh2)(cAAC)] (11). The vanadium(V) complexes [V(O)Cl3(IDipp)] (12) and [V(O)Cl3(SIDipp)] (13) were selectively prepared from oxygen oxidation of 4 and 5. The complex 12 and [V(O)Cl3(IMes)] react with isocyanates ArNCO to yield the NHC-ligated imido complexes [V(:NAr1)Cl3(IDipp)] (14, Ar1 = 4-MeC6H4), [V(:NAr2)Cl3(IDipp)] (15, Ar2 = 4-FC6H4), [V(:NAr1)Cl3(SIDipp)] (16), [V(:NAr2)Cl3(SIDipp)] (17), [V(:NAr1)Cl3(IMes)] (18) and [V(:NAr2)Cl3(IMes)] (19).

Dalton Transactions published new progress about Amines Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (imido complexes). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Xie, Gaozhan; Brosius, Victor; Han, Jie; Rominger, Frank; Dreuw, Andreas; Freudenberg, Jan; Bunz, Uwe H. F. published the artcile< Stable Radical Cations of N,N'-Diarylated Dihydrodiazapentacenes>, Reference of 576-83-0, the main research area is diaryla dihydrodiazapentacene radical cation crystal structure UV EPR spectra; N,N′-diaryldiazapentacenes; oxidation; radical cation; single crystal structure.

A series of quinoidal N,N’-diaryldiaza-N,N’-dihydropentacenes (Quino) was prepared in a two-step reaction, starting from quinacridone. Oxidation of Quino furnishes stable radical cations, isoelectronic to the radical anions of the azaacenes, whereas the dicationic species are isoelectronic to neutral azapentacenes. The spectroscopic properties of the diaryldiazapentacenes and their oxidized mono- and dications are equivalent to that of the dianion of tetraazapentacene (TAP), its radical anion and the neutral TAP.

Chemistry – A European Journal published new progress about Aromaticity. 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

Xu, Miaomiao; Chen, Liang; Yan, Qiang published the artcile< Gas-Constructed Vesicles with Gas-Moldable Membrane Architectures>, SDS of cas: 576-83-0, the main research area is vesicle membrane carbon dioxide frustrated Lewis pair nanomaterial; carbon dioxide; frustrated Lewis pair; gas-bridged bond; nanomaterial; vesicle.

Integrating gas as a main building block into nanomaterial construction is a challenging mission that remains elusive. Herein, we report a gas-constructed vesicular system formed by CO2 gas and frustrated Lewis pairs (FLPs). Two mol. triads bearing three bulky borane and phosphine groups are designed as trivalent disk-like FLP monomers. CO2, as a gas cross-linker, can drive the two-dimensional polymerization of these two FLP monomers, leading to the generation of planar FLP networks that further transform into a thermodynamically favored membranous vesicle structure. Gas-guided vesicle formation is also applicable to other inert but FLP-activatable gases. Different gas linkages can form vesicles with distinct architectures, sizes, and morphologies. We envisage that this study would suggest a new concept that exploits gases to fabricate tunable nanomaterials.

Angewandte Chemie, International Edition published new progress about Electrospray ionization mass spectra. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, SDS of cas: 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Barroso, Santiago; Joksch, Markus; Puylaert, Pim; Tin, Sergey; Bell, Stephen J.; Donnellan, Luke; Duguid, Stewart; Muir, Colin; Zhao, Peichao; Farina, Vittorio; Tran, Duc N.; de Vries, Johannes G. published the artcile< Improvement in the Palladium-Catalyzed Miyaura Borylation Reaction by Optimization of the Base: Scope and Mechanistic Study>, Category: bromides-buliding-blocks, the main research area is palladium catalyzed Miyaura borylation aryl halide base optimization; Arylboronic acid ester preparation.

Aryl boronic acids and esters are important building blocks in API synthesis. Pd-catalyzed Suzuki Miyaura borylation is the most common method for their preparation This paper describes an improvement of the current reaction conditions. By using lipophilic bases such as K 2-Et hexanoate, borylation reaction could be achieved at 35° in <2 h with very low Pd loading (0.5 mol %). A preliminary mechanistic study shows a hitherto unrecognized inhibitory effect by the carboxylate anion on the catalytic cycle, whereas 2-Et hexanoate minimizes this inhibitory effect. This improved methodol. enables borylation of a wide range of substrates under mild conditions. Journal of Organic Chemistry 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, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhao, Haihong; Zhao, Ning; Matus, Ekaterina V.; Ismagilov, Zinfer R.; Li, Lei; Xiao, Fukui published the artcile< Preparation and modulation of Cu-BTC-(n)Br/MCFs with water stability and its application for CO2 capture>, Quality Control of 576-83-0, the main research area is copper trimesic acid bromine MCF water carbon dioxide capture.

In this study, a novel composite Cu-BTC-(n)Br/MCFs was successfully synthesized by solvothermal method. The composites were characterized by XRD, N2 adsorption and desorption, SEM, FT-IR, TG, and water vapor adsorption technologies. Meanwhile, the CO2 adsorption isotherms were obtained using the static adsorption instrument which could be well fitted by the Langmuir-Freundlich model. The Cu-BTC-0.05Br/MCFs exhibited a good CO2 adsorption capacity of 2.44 mmol/g which was basically maintained after five adsorption-desorption cycles. More importantly, the Cu-BTC-0.05Br/MCFs also showed remarkable adsorption effectivity that was an increase of 8.7% than the Cu-BTC/MCFs at 35 °C and 1 bar after water treatment. The Cu-BTC-(n)Br/MCFs were promising candidate materials for effectively CO2 capture in practical application.

Journal of Environmental Chemical Engineering published new progress about Adsorption. 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

Gao, Chao; Li, Jian; Yin, Sheng; Sun, Junliang; Wang, Cheng published the artcile< Twist Building Blocks from Planar to Tetrahedral for the Synthesis of Covalent Organic Frameworks>, Synthetic Route of 576-83-0, the main research area is twist building planar tetrahedral covalent organic framework.

Rational construction of covalent organic frameworks (COFs) with novel structures still remains a challenge. Herein, we report the designed synthesis of two COFs, 2D-BPTA-COF and 3D-BMTA-COF, starting from biphenyl-based precursors but with different groups at the ortho positions. Both COFs exhibited high crystallinity and large surface area, and interestingly, 2D-BPTA-COF crystallizes into 2D sheets with AB stacking mode while 3D-BMTA-COF adopts a 7-fold interpenetrated structure with pts topol. This structural difference could be ascribed to the introduction of Me groups in the building blocks, as the dihedral angle of biphenyl rings in 2D-BPTA-COF is ∼0° while in 3D-BMTA-COF it is ∼60°. Therefore, it is possible to synthesize COFs with different structures by twisting building blocks from planar to tetrahedral with steric hindrance. We believe this result represents a general and straightforward way to expand the diversity of tetrahedral nodes for constructing 3D COFs in the future, and moreover, a new tetrahedral node for constructing 3D COFs is now available.

Journal of the American Chemical Society published new progress about Aminoplasts, polyazomethine- Role: PRP (Properties), SPN (Synthetic Preparation), TEM (Technical or Engineered Material Use), PREP (Preparation), USES (Uses). 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

Cao, Dawei; Yan, Chaoxian; Zhou, Panpan; Zeng, Huiying; Li, Chao-Jun published the artcile< Hydrogen bonding promoted simple and clean photo-induced reduction of C-X bond with isopropanol>, Recommanded Product: 2,4,6-Trimethylbromobenzene, the main research area is hydrogen bonding photoinduced reductive dehalogenation isopropanol.

We herein report a simple and clean photo-induced metal-free reduction of C-X bond under an atm. of air at room temperature Isopropanol is used as both the reducing reagent and solvent [e.g., Me 4-iodobenzoate → Me benzoate (96%) under UV irradiation in isopropanol]. Various functional groups (acids, esters, alcs., anilines, phenols, indoles, pyridines, cyano and trifluoromethyl groups) and other heterocyclic compounds are tolerated. Different organic halides (including C-I, C-Br and C-Cl bonds) can be dehalogenated with moderate to excellent yields. Polyhalides are also reduced chemoselectively and efficiently. DFT calculation suggests a six-membered ring transition state via C-X···H-O hydrogen bonding to decrease the activation energy.

Chemical Communications (Cambridge, United Kingdom) published new progress about Aryl halides Role: POL (Pollutant), RCT (Reactant), OCCU (Occurrence), RACT (Reactant or Reagent) (and heteroaryl halides and polyhalides). 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

Gupta, Priyanka; Siewert, Jan-Erik; Wellnitz, Tim; Fischer, Malte; Baumann, Wolgang; Beweries, Torsten; Hering-Junghans, Christian published the artcile< Reactivity of phospha-Wittig reagents towards NHCs and NHOs>, Synthetic Route of 576-83-0, the main research area is phosphaWittig reagent reaction heterocyclic carbene olefin; crystal structure carbene phosphinidene phosphinoimidazolylidene adduct; mol structure carbene phosphinidene phosphinoimidazolylidene adduct; optimized geometry carbene phosphinidene phosphinoimidazolylidene adduct DFT.

Phospha-Wittig reagents, RPPMe3 (R = Mes* 2,4,6-tBu3-C6H2; MesTer 2,6-(2,4,6-Me3C6H2)-C6H3; DipTer 2,6-(2,6-iPr2C6H3)-C6H3), can be considered as phosphine-stabilized phosphinidenes. PMe3 can be displaced by NHCs or NHOs. Phosphinidene-like reactivity results in a subsequent C(sp2)-H activation of the exocyclic CH2 group in NHOs. This concept was further extended to allyl-appended NHOs, which resulted in phosphine-substituted allyl species.

Dalton Transactions published new progress about Crystal structure. 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

Blanco, Matias; Mosconi, Dario; Tubaro, Cristina; Biffis, Andrea; Badocco, Denis; Pastore, Paolo; Otyepka, Michal; Bakandritsos, Aristides; Liu, Zhibo; Ren, Wencai; Agnoli, Stefano; Granozzi, Gaetano published the artcile< Palladium nanoparticles supported on graphene acid: a stable and eco-friendly bifunctional C-C homo- and cross-coupling catalyst>, Synthetic Route of 576-83-0, the main research area is graphene acid palladium nanoparticle cross coupling catalyst.

A mild impregnation of graphene acid (GA) with Pd(OAc)2 yields Pd nanoparticles with a size that can be easily controlled by the amount of the Pd precursor, and with a sharp and tunable size distribution ranging from 1 nm up to 9 nm. The spectroscopic and microscopic characterization of the GA-Pd composites reveals a strong interaction between the metal and the carboxyl groups of the GA support, and suggests a nanoparticle growth mechanism entailing counterion metathesis followed by a GA promoted reduction The GA-Pd nanohybrids are highly active catalysts in the Suzuki-Miyaura cross coupling reaction under environmentally-friendly conditions. TOF values exceeding 30 000 h-1, high selectivity toward the coupling product and versatility for a large variety of substrates are reported. Given the large amount of carboxyl groups, the catalysts are exceptionally stable, and no appreciable metal leaching is observed during the reaction. Notably, at variance with conventional carbon and graphene supports, the GA supported Pd nanoparticles show a bifunctional activity and can yield biphenyl adducts upon oxidative homocoupling of arylboronic acids.

Green Chemistry published new progress about Binding energy. 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

Grassl, Simon; Hamze, Clemence; Koller, Thaddaeus J.; Knochel, Paul published the artcile< Copper-Catalyzed Electrophilic Thiolation of Organozinc Halides by Using N-Thiophthalimides Leading to Polyfunctional Thioethers>, COA of Formula: C9H11Br, the main research area is organozinc halide thiophthalimide copper catalyst electrophilic thiolation; thioether thiocyanate selenide preparation; copper catalysis; electrophilic thiolation; organozinc halides; thioethers; trifluoromethylthioation.

(Hetero)aryl, benzylic, and alkyl zinc halides were thiolated with N-thiophthalimides at 25 °C within 1 h in the presence of 5-10 % Cu(OAc)2·H2O to furnish the corresponding polyfunctionalized thioethers in good yields. This electrophilic thiolation was extended to the introduction of trifluoromethylthio (SCF3), thiocyanate (SCN), and selenophenyl (SePh) groups. The utility of this method was shown in a seven-step synthesis of a potent cathepsin D inhibitor in 34% overall yield.

Chemistry – A European Journal 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, COA of Formula: C9H11Br.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary