Tag: M.W=150-200

Xu, Pin; Fan, Wenzheng; Chen, Pinhong; Liu, Guosheng published the artcile< Enantioselective Radical Trifluoromethylation of Benzylic C-H Bonds via Cooperative Photoredox and Copper Catalysis>, Quality Control of 2725-82-8, the main research area is benzylic trifluoromethyl preparation enantioselective; alkyl arene trifluoromethylation photoredox copper catalyst.

The first enantioselective radical trifluoromethylation of benzylic C-H bonds has been established by a cooperative photoredox and copper catalysis system, providing straightforward access to structurally diverse benzylic trifluoromethylation products RCH(CF3)CH2R1 [R = Ph, 2-phenyl-1,3-benzothiazol-6-yl, 4-cyclopropylphenyl, etc.; R1 = H, n-Pr, 2-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl)ethyl, 2-chloroethyl, etc.] in good yields with excellent enantioselectivities under mild conditions. A broad substrate scope and excellent functional group compatibility were reported. Merging the cooperative photoredox catalysis with copper catalysis is essential for the reaction, where the photoredox catalysis is used for the generation of benzylic radicals from alkyl arenes alkyl arenes RCH2CH2R1 through a hydrogen atom transfer process and the copper catalysis is used for the enantioselective trifluoromethylation of the benzylic radicals.

Journal of the American Chemical Society published new progress about Alkylarenes Role: RCT (Reactant), RACT (Reactant or Reagent). 2725-82-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H9Br, Quality Control of 2725-82-8.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Nishitani, Shohei; Sekiya, Ryo; Matsumoto, Ikuya; Haino, Takeharu published the artcile< Blueish-white-light-emitting Nanographenes Developed by Pd-catalyzed Suzuki-Miyaura Cross Coupling Reactions>, Product Details of C7H8BrN, the main research area is lead catalyst cross coupling reaction light emitting nanographene.

Top-down methods produce nanographenes with many carboxy groups on their edges. These functional groups can be utilized for developing multichromophoric systems. As proof of concept, pyrene is installed on the edges by Pd-catalyzed cross-coupling reactions. The lack of monomer emissions from the functionalized nanographenes indicates that the neighboring chromophores are sufficiently distant to form the excimer. The pyrene-installed nanographene emits bluish-white-light. Its lipophilic nature allows fabricating a nanographene-dispersed polymethyl methacrylate film emitting visible light.

Chemistry Letters published new progress about Carboxyl group. 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Product Details of C7H8BrN.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Kaiyue; Lu, Guilong; Chu, Feng; Huang, Xiubing published the artcile< Au/TiO2 nanobelts: thermal enhancement vs. plasmon enhancement for visible-light-driven photocatalytic selective oxidation of amines into imines>, Recommanded Product: 4-Bromobenzylamine, the main research area is mixed phase titanium dioxide nanobelt preparation; Au loaded titanium dioxide preparation; imine selective preparation; amine oxidation titanium dioxide nanocatalyst.

Herein, photocatalytic selective aerobic oxidation of amines to imines RCH2N=CHR1 [R = R1 = Ph, 2-BrC6H4, 3-pyridyl, etc.] was investigated under visible light irradiation over heterostructured TiO2(B)/anatase and Au/TiO2 nanobelts at specific temperatures (20-60°C). The surface amine substrate complexed on TiO2 could broaden the visible-light absorption region via the ligand-to-metal charge transfer (LMCT) effect. Interestingly, the pristine TiO2 achieved the best photocatalytic performance (>99% benzylamine conversion and >99% N-benzylidenebenzylamine selectivity) at 60°C after 12 h irradiation while the Au nanoparticles (NPs) were observed to improve the activity of TiO2 only in a low temperature range (<40°C). Moreover, excessive Au NPs loaded on TiO2 could inhibited the amine conversion and reduced the imine selectivity in the whole temperature range of 20-60°C, which was attributed to the decreased oxygen vacancies and poor amine adsorption ability on the surface of Au/TiO2. Catalysis Science & Technology 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, Recommanded Product: 4-Bromobenzylamine.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Xia; Lang, Xianjun published the artcile< Cooperative smart TiO2 photocatalysis and TEMPO catalysis: visible light-mediated selective aerobic oxidation of amines>, Formula: C7H8BrN, the main research area is photooxidation catalyst adsorption visible light.

Here, we report a highly efficient cooperative photocatalytic system for the selective oxidation of amines with air. The visible light-assisted adsorption of amines gives rise to a visible light complex on TiO2 that can be self-repaired to safeguard smart photocatalysis. Smart TiO2 photocatalysis works cooperatively with TEMPO catalysis that can perform the visible light-mediated selective oxidation of amines in a swift and recyclable manner. This discovery provides an alternative for addressing environmental challenges by reducing pollutants at the source for oxidative chem. reactions. (c) 2020 American Institute of Physics.

Journal of Chemical Physics published new progress about Adsorption. 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Formula: C7H8BrN.

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

He, Ben; Zhang, Sikun; Zhang, Yueyan; Li, Guoping; Zhang, Bingjie; Ma, Wenqiang; Rao, Bin; Song, Ruitong; Zhang, Lei; Zhang, Yanfeng; He, Gang published the artcile< ortho-Terphenylene Viologens with Through-Space Conjugation for Enhanced Photocatalytic Oxidative Coupling and Hydrogen Evolution>, Quality Control of 3959-07-7, the main research area is Terphenylene Viologens Through Space Conjugation Photocatalytic Oxidative Coupling; Enhanced Photocatalytic Oxidative Coupling Hydrogen Evolution WS.

A series of novel ortho-terphenylene viologen derivatives (o-TPV2+) with through-space conjugation (TSC) via the combination of ortho-terphenylene skeletons with viologen structure is reported. Their optoelectronic properties can be adjusted by N-arylation or N-alkylation reactions. Compared with other viologen derivatives, o-TPV2+ not only exhibits strong photoluminescence, but also retards the charge recombination process and stabilizes diradicals state without forming a quinoid structure due to the special TSC effect. Based on their special redox characteristics, o-TPV2+ were applied to the photocatalytic oxidative coupling of benzylamine with 96% yield. In addition, pTA-o-TPV2+ (tethered with p-toluic acid) modified g-C3N4 was used for visible-light-driven hydrogen production for the first time, exceeding 15 times the rate over unmodified g-C3N4.

Journal of the American Chemical Society published new progress about Biradicals Role: PRP (Properties). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Quality Control of 3959-07-7.

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

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

Zeynizadeh, Behzad; Mohammad Aminzadeh, Farkhondeh; Mousavi, Hossein published the artcile< Green and convenient protocols for the efficient reduction of nitriles and nitro compounds to corresponding amines with NaBH4 in water catalyzed by magnetically retrievable CuFe2O4 nanoparticles>, Synthetic Route of 3959-07-7, the main research area is reusable copper ferrite magnetic nanoparticle preparation surface area recyclability; benzonitrile sodium borohydride copper ferrite nanocatalyst reduction green chem; benzylamine preparation; nitrobenzene sodium borohydride copper ferrite nanocatalyst reduction green chem; aniline preparation.

Firstly, CuFe2O4 nanoparticles were prepared by a simple operation. The structure of the mentioned nanoparticles was characterized by Fourier transform IR spectroscopy, X-ray diffraction, SEM, transmission electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma-optical emission spectrometry, vibrating sample magnetometer and also Brunauer-Emmett-Teller and Barrett-Joyner-Halenda analyses. The prepared magnetically copper ferrite nanocomposite was successfully applied as a simple, cost-effective, practicable and recoverable catalyst on the green, highly efficient, fast, base-free and ligand-free reduction of nitriles and also on the affordable and eco-friendly reduction of nitro compounds with the broad substrate scope to the corresponding amines with NaBH4 in water at reflux in high to excellent yields.

Research on Chemical Intermediates published new progress about Anilines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Synthetic Route of 3959-07-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhu, Xianjin; Liu, Yong; Liu, Can; Yang, Haijun; Fu, Hua published the artcile< Light and oxygen-enabled sodium trifluoromethanesulfinate-mediated selective oxidation of C-H bonds>, Application of C8H9Br, the main research area is aromatic ketone green preparation; alkyl arene selective oxidation light oxygen sodium trifluoromethanesulfinate mediated; carboxylic acid green preparation; methyl arene selective oxidation light oxygen sodium trifluoromethanesulfinate mediated; aldehyde selective oxidation light oxygen sodium trifluoromethanesulfinate mediated.

Here, for the first time, a novel strategy, light and oxygen-enabled sodium trifluoromethanesulfinate-mediated selective oxidation of C-H bonds, allowing high-value-added aromatic ketones and carboxylic acids to be easily prepared in high-to-excellent yields using readily available alkyl arenes, Me arenes and aldehydes as materials was reported. The mechanistic investigations showed that the treatment of inexpensive and readily available sodium trifluoromethanesulfinate with oxygen under irradiation of light could in situ form a pentacoordinate sulfide intermediate as an efficient photosensitizer. The method represented a highly efficient, economical and environmentally friendly strategy and the light and oxygen-enabled sodium trifluoromethanesulfinate photocatalytic system represents a breakthrough in photochem.

Green Chemistry published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 2725-82-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H9Br, Application of C8H9Br.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary