Tag: M.W=150-200

An, Shuyi; Guo, Zhifen; Liu, Xin; Che, Yan; Xing, Hongzhu; Chen, Peng published the artcile< Visible-light-responsive lanthanide coordination polymers for highly efficient photocatalytic aerobic oxidation of amines and thiols>, Electric Literature of 3959-07-7, the main research area is coordination polymer lanthanide anthracene ethyne dibenzoate fluorobenzoate complex preparation; photochem oxidation catalyst lanthanide anthracene ethyne dibenzoate fluorobenzoate polymeric; crystal structure lanthanide anthracene ethyne dibenzoate fluorobenzoate polymeric complex.

Development of visible-light-induced photocatalytic reactions using mol. oxygen as the terminal oxidant is intriguing in view of the current environmental and energy issues. The authors report herein the synthesis and characterization of a series of novel photocatalysts of lanthanide coordination polymers (Ln-CPs) with desirable characters of wide-range visible-light adsorption and excellent chem. stability. They show excellent selectivity and yield for the aerobic oxidation of amines and thiols to produce imines and disulfide, resp. Mechanism studies including ESR and radical quenching indicate these Ln-CPs are highly efficient to activate mol. oxygen into highly reactive oxygen species of superoxide radical and singlet oxygen via photoinduced electron and energy transfer, resp. It is notable that the photocatalytic oxidation of thiols into disulfide have never been reported using a CP photocatalyst prior to this study. Meanwhile, the synthesized CPs exhibits superior photocatalytic performance to other reported ones for amine oxidation due to the synergy of singlet oxygen and superoxide radical species. The work provides an in-depth understanding of the photoinduced oxygen activation based on a CP photocatalyst to accomplish a visible-light-induced reaction, illustrating the great potential of photoactive CPs for green synthesis.

New Journal of Chemistry 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, Electric Literature of 3959-07-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gensch, Tobias; Smith, Sleight R.; Colacot, Thomas J.; Timsina, Yam N.; Xu, Guolin; Glasspoole, Ben W.; Sigman, Matthew S. published the artcile< Design and Application of a Screening Set for Monophosphine Ligands in Cross-Coupling>, Application of C9H11Br, the main research area is arene aryl boronic acid palladium phosphine Suzuki coupling; bromobenzene aminobenzimidazole palladium phosphine chemoselective Buchwald Hartwig amination.

A virtual library, kraken, which is representative of the monodentate P(III)-ligand chem. space, was utilized as the basis to represent the discrete ligands as continuous variables. Using dimensionality reduction and clustering techniques, a Phosphine Optimization Screening Set (PHOSS) of 32 com. available ligands was suggested that samples this chem. space completely and evenly. The application of this screening set was presented in the identification of active catalysts for various cross-coupling reactions and show how well-distributed sampling of the chem. space facilitates identification of active catalysts. Furthermore, how proximity in ligand space can be a useful guide to further explore ligands when very few active catalysts are known was demonstrated.

ACS Catalysis 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, Application of C9H11Br.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Bai, Xueying; Huang, Liliang; Qing, Bin; Zuo, Zhicheng; Feng, Huangdi published the artcile< Catalyst-Free Hydrogen Proton Transfer Reduction of Nitrobenzamides to Aminobenzamides with i-PrOH/KOH System>, Computed Properties of 3959-07-7, the main research area is aminobenzamide preparation chemoselective; nitrobenzamide hydrogen proton transfer reduction.

A reduction of nitrobenzenes via the combination of KOH and isopropanol was established for the general synthesis of aniline derivatives A metal catalyst isn’t required in this alternative reduction reaction, and a series of nitrobenzamide compounds RC6H4C(O)NHR1 (R = 2-NO2, 3-NO2, 4-NO2; R1 = 4-bromobenzyl, 2,6-diisopropylphenyl, 3-methoxybenzyl, etc.) were chemoselectively reduced into the corresponding aminobenzamides RC6H4C(O)NHR1 (R = 2-NH2, 3-NH2, 4-NH2) in good to excellent yields. This reaction is operationally simple, and proceeds under mild conditions.

Asian Journal of Organic Chemistry published new progress about Aromatic amines Role: SPN (Synthetic Preparation), PREP (Preparation). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Computed Properties of 3959-07-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Nishii, Yuji; Ikeda, Mitsuhiro; Hayashi, Yoshihiro; Kawauchi, Susumu; Miura, Masahiro published the artcile< Triptycenyl Sulfide: A Practical and Active Catalyst for Electrophilic Aromatic Halogenation Using N-Halosuccinimides>, HPLC of Formula: 576-83-0, the main research area is arene triptycenyl sulfide catalyst electrophilic aromatic halogenation halosuccinimide regioselective; aryl halide preparation.

A Lewis base catalyst Trip-SMe (Trip = triptycenyl) for electrophilic aromatic halogenation using N-halosuccinimides (NXS) is introduced. In the presence of an appropriate activator (as a noncoordinating-anion source), a series of unactivated aromatic compounds were halogenated at ambient temperature using NXS. This catalytic system was applicable to transformations that are currently unachievable except for the use of Br2 or Cl2: e.g., multihalogenation of naphthalene, regioselective bromination of BINOL, etc. Controlled experiments revealed that the triptycenyl substituent exerts a crucial role for the catalytic activity, and kinetic experiments implied the occurrence of a sulfonium salt [Trip-S(Me)Br][SbF6] as an active species. Compared to simple dialkyl sulfides, Trip-SMe exhibited a significant charge-separated ion pair character within the halonium complex whose structural information was obtained by the single-crystal X-ray anal. A preliminary computational study disclosed that the π system of the triptycenyl functionality is a key motif to consolidate the enhancement of electrophilicity.

Journal of the American Chemical Society published new progress about Aromatic compounds 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

Dong, Zhaowen; Schmidtmann, Marc; Mueller, Thomas published the artcile< Potassium Salts of 2,5-Bis(trimethylsilyl)-Germolide: Switching between Aromatic and Non-Aromatic States>, Application In Synthesis of 576-83-0, the main research area is potassium salt trimethylsilyl germolide preparation crystal mol structure reactivity; switching aromatic non aromatic state mesityl silyl germolole; X-ray diffraction; aromaticity; density functional calculations; germacyclopentadienyl anion; germanium.

The reduction of a 1-mesityl-2,5-bis-trimethylsilylchlorogermole 8 with KC8 is reported. While the reaction with one equivalent of KC8 gave the dimer with a Ge-Ge bond 10, excess of KC8 (four equivalent) resulted in the formation of the potassium salt of the germole dianion, 11 with reductive cleavage of the Ge-C bond. Careful reduction with two equivalent of KC8 in THF provided the potassium salt of the planar germolide 5. Its solid-state structure revealed contact ion pairs with the potassium ion η5-coordinated to the germacyclopentadienide ring. The mol. structure of the anion indicates a high degree of cyclic electron delocalization, in agreement with results from DFT calculations Separation of the ion pair by complexation of the potassium ions with 18-crown-6 triggers the isomerization to germolide 6, which is characterized by a pyramidal coordination sphere of the germanium atom and a localized diene structure. The isomers 5 and 6 represent a rare example for a structurally manifested switch between a non-aromatic and an aromatic state induced by an external stimulus, in this case the complexation of the counter cation.

Chemistry – A European Journal published new progress about Aromaticity. 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

Arikawa, Shinobu; Shimizu, Akihiro; Shintani, Ryo published the artcile< Azoniadibenzo[a,j]phenalenide: A Polycyclic Zwitterion with Singlet Biradical Character>, Electric Literature of 576-83-0, the main research area is azoniadibenzo phenalenide zwitterion singlet triplet biradical crystal structure; aromaticity; density-functional calculations; polycycles; radicals; zwitterions.

A polycyclic zwitterion, azoniadibenzo[a,j]phenalenide, having a singlet biradical character, was synthesized and isolated for the first time. The neg. charge was found to be delocalized over the periphery of the main core of the zwitterion and the pos. charge was localized near the nitrogen atom. Its singlet biradical character was confirmed by a small HOMO-LUMO energy gap with their spatial overlap, and observation of thermally excited triplet species together with DFT calculations

Angewandte Chemie, International Edition published new progress about Atropisomerization. 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

Lamola, Jairus L.; Moshapo, Paseka T.; Holzapfel, Cedric W.; Maumela, Munaka Christopher published the artcile< Designing biaryl phosphacyclic ligands: their characterization and evaluation in palladium-catalyzed Suzuki-Miyaura reactions of aryl bromides and chlorides>, Recommanded Product: 2,4,6-Trimethylbromobenzene, the main research area is biaryl preparation; aryl bromide chloride arylboronic acid Suzuki Miyaura cross coupling; palladium catalyst biaryl phosphacyclic ligand.

Efficient palladium catalyst systems based on the combination of bench stable biaryl phosphacycles and Pd(OAc)2 are described for Suzuki-Miyaura cross-coupling reactions of aryl bromides and chlorides. Notably, the electronically and sterically diametric biaryl phosphacycles allowed facile coupling of sterically hindered and heterocyclic substrates.

Phosphorus, Sulfur and Silicon and the Related Elements 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, Recommanded Product: 2,4,6-Trimethylbromobenzene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary