Tag: M.W=150-200

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

Liu, Kui; Wang, Gang; Zhang, Zhe-Wen; Shi, Yu-Yang; Ye, Zhi-Shi published the artcile< C-C Bond Activation of Cyclopropanes Enabled by Phosphine-Catalyzed In Situ Formation of High-Strain Methylenecycopropane Intermediate>, Category: bromides-buliding-blocks, the main research area is pentadiene sulfonamide isoindoline preparation; cyclopropane sulfonamide ring opening elaboration phosphine catalyst.

An effective strategy for the ring-opening/elaboration of cyclopropanes by phosphine catalyst is documented, providing the 2,4-pentadiene sulfonamides and isoindolines in moderate to good yields. The key to the success of this reaction is phosphine-catalyzed introduction of a trigonal center into cyclopropanes, which results in the formation of higher ring strain cyclopropylidenemethyl phosphonium salt. Moreover, this methodol. is employed as the key step for the synthesis of bioactive mols.

Organic Letters published new progress about Acid chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Dan, Demin; Chen, Fubo; Zhao, Whenshu; Yu, Han; Han, Sheng; Wei, Yongge published the artcile< Chromium-catalysed efficient N-formylation of amines with a recyclable polyoxometalate-supported green catalyst>, Related Products of 3959-07-7, the main research area is formamide preparation; formic acid amine chromium catalyst formylation green chem; polyoxometalate based chromium catalyst preparation crystallinity.

A simple and efficient protocol for the formylation of amines with formic acid, catalyzed by a polyoxometalate-based chromium catalyst was described. Notably, this method showed excellent activity and chemoselectivity for the formylation of primary amines, diamines were successfully employed. Importantly, the chromium catalyst is potentially non-toxic, environmentally benign and safer than the widely used high valence chromium catalysts such as CrO3 and K2Cr2O7. The catalyst can be recycled several times with a negligible impact on activity. Finally, a plausible mechanism was provided based on the observation of intermediate and control experiments

Dalton Transactions published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Related Products of 3959-07-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sun, Wenhao; Xiang, Yonggang; Jiang, Zhihui; Wang, Shengyao; Yang, Nan; Jin, Shangbin; Sun, Linhao; Teng, Huailong; Chen, Hao published the artcile< Designed polymeric conjugation motivates tunable activation of molecular oxygen in heterogeneous organic photosynthesis>, Product Details of C7H8BrN, the main research area is thioether photocatalyst oxidation; sulfoxide preparation; aryl methanamine photocatalyst oxidative coupling reaction; diaryl azapropene preparation.

Herein, the first identification of tunable mol. oxygen activation induced by polymeric conjugation in nonmetallic conjugated microporous polymers (CMP) was reported. The conjugation between these can be achieved by the introduction of alkynyl groups. CMP-A with an alkynyl bridge facilitates the intramol. charge mobility while CMP-D, lacking an alkynyl group enhances the photoexcited carrier build-up on the surface from diffusion. These different processes dominate the directed ROS generation of the superoxide radical (·O-2) and singlet oxygen (1O2), resp. This theory is substantiated by the different performances of these CMPs in the aerobic oxidation of sulfides and the dehydrogenative coupling of amines, and could provide insight into the rational design of CMPs for various heterogeneous organic photosynthesis.

Science Bulletin published new progress about Aromatic amines Role: RCT (Reactant), RACT (Reactant or Reagent). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Product Details of C7H8BrN.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Peihe; Wang, Yingying; Wang, Xia; Wang, Yin; Liu, Ying; Huang, Keke; Hu, Jing; Duan, Limei; Hu, Changwen; Liu, Jinghai published the artcile< Selective Oxidation of Benzylic C-H Bonds Catalyzed by Cu(II)/{PMo12}>, Name: 1-Bromo-3-ethylbenzene, the main research area is selective oxidation benzylic carbon hydrogen bond copper polyoxometalate catalyst; ketone preparation selective oxidation benzylic carbon hydrogen mechanism.

Precise catalytic regulation of carbon radical generation by a highly active oxygen radical to abstract the H atom in a C-H bond is an effective method for the selective activation of C-H synthetic chem. Herein, we report a facile catalyst system with com. available copper(II)/{PMo12} to form a tert-butanol radical intermediate for the selective oxidation of benzylic C-H bonds. The reaction shows a broad range of substrates (benzyl methylene, benzyl alcs.) with good functional group tolerance and chem. selectivity. The corresponding carbonyl compounds were synthesized with good yields under mild conditions. DFT calculations and exptl. anal. further demonstrated a reasonable carbon radical mechanism for this type of organic transformation reaction.

Journal of Organic Chemistry published new progress about Aralkyl alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 2725-82-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H9Br, Name: 1-Bromo-3-ethylbenzene.

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

Zhang, Huan-Huan; Zhan, Guo-Peng; Liu, Zi-Kun; Wu, Chuan-De published the artcile< Photocatalytic Hydrogen Evolution Coupled with Production of Highly Value-Added Organic Chemicals by a Composite Photocatalyst CdIn2S4@MIL-53-SO3Ni1/2>, COA of Formula: C7H8BrN, the main research area is photocatalytic hydrogen evolution catalyst cadmium indium sulfide; hydrogen evolution; metal-organic frameworks; photocatalysis; suspended ion catalysts; water splitting.

Photocatalytic water splitting coupled with the production of highly value-added organic chems. is of significant importance, which represents a very promising pathway for transforming green solar energy into chem. energy. Herein, we report a composite photocatalyst CdIn2S4@MIL-53-SO3Ni1/2, which is highly efficient on prompting water splitting for the production of H2 in the reduction half-reaction and selective oxidation of organic mols. for the production of highly value-added organic chems. in the oxidation half-reaction under visible light irradiation The superior photocatalytic properties of the composite photocatalyst CdIn2S4@MIL-53-SO3Ni1/2 should be ascribed to coating suspended ion catalyst (SIC), consisting of redox-active NiII ions in the anionic pores of coordination network MIL-53-SO3-, on the surface of photoactive CdIn2S4, which endows photogenerated electron-hole pairs sep. more efficiently for high rate production of H2 and selective production of highly value-added organic products, demonstrating great potential for practical applications.

Chemistry – An Asian Journal published new progress about Band gap. 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, COA of Formula: C7H8BrN.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhou, Jimei; Jia, Minxian; Song, Menghui; Huang, Zhiliang; Steiner, Alexander; An, Qidong; Ma, Jianwei; Guo, Zhiyin; Zhang, Qianqian; Sun, Huaming; Robertson, Craig; Bacsa, John; Xiao, Jianliang; Li, Chaoqun published the artcile< Chemoselective Oxyfunctionalization of Functionalized Benzylic Compounds with a Manganese Catalyst>, Reference of 2725-82-8, the main research area is aryl ketone preparation chemoselective green chem; heterocyclic preparation chemoselective green chem; aromatic hydrocarbon oxidation manganese catalyst; Benzylic Oxidation; Cyclic Imines; Ketones; Manganese Catalysts; Selective Oxidation.

Reported in this study is a new non-heme Mn catalyst stabilized by a bipiperidine-based tetradentate ligand, which enables methylene oxidation of benzylic compounds RCH2(CH2)nCH2R1 (R = Ph, 4-chlorophenyl, 2-bromophenyl, etc.; R1 = COOH, Me, Et, etc.) by H2O2, showing high activity and excellent chemoselectivity under mild conditions. The protocol tolerates an unprecedentedly wide range of functional groups, including carboxylic acid and derivatives, ketone, cyano, azide, acetate, sulfonate, alkyne, amino acid, and amine units, thus providing a low-cost, more sustainable and robust pathway for the facile synthesis of ketones RC(O)(CH2)nCH2R1, increase of complexity of organic mols., and late-stage modification of drugs.

Angewandte Chemie, International Edition published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 2725-82-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H9Br, Reference of 2725-82-8.

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

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