M.W=250-300 Archives - Page 39 of 46 - Bromides-buliding-blocks

Gong, Zhimin team published research in Chemical Engineering Journal (Amsterdam, Netherlands) in 2022 | 90-59-5

COA of Formula: C7H4Br2O2, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

3,5-Dibromosalicylaldehyde, also known as 3,5-Dibromosalicylaldehyde, is a useful research compound. Its molecular formula is C7H4Br2O2 and its molecular weight is 279.91 g/mol. The purity is usually 95%.

3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes. 3,5-Dibromosalicylaldehyde can be used in the synthesis of Schiff base and can be used as reactant for synthesis of Schiff base ligands which forms mononuclear complexes with copper(II), nickel(II), zinc(II) and cobalt(II).

3,5-Dibromosalicylaldehyde is a copper complex that has been synthesized from 3,5-dibromosalicylaldehyde and copper chloride. FTIR spectroscopy revealed that the coordination geometry of the copper complex is octahedral with two nitrogen atoms in the equatorial plane. The presence of hydrogen bonding interactions was confirmed by homologous protein adsorption experiments. This chemical structure was determined using X-ray crystallography and fluorescence probe experiments. The copper complex showed high affinity for malonic acid, which is an ester hydrochloride. The molecular mechanism of this interaction is based on adsorption, which occurs through hydrogen bonding interactions and hydrophobic interactions. Structural analysis revealed that the polymeric matrix consists of a three-dimensional network of crosslinked chains, while FTIR analysis indicated a possible disulfide bond between two cysteine residues., 90-59-5.

A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. 90-59-5, formula is C7H4Br2O2, Name is 3,5-Dibromo-2-hydroxybenzaldehyde. Organobromine compounds have fallen under increased scrutiny for their environmental impact., COA of Formula: C7H4Br2O2.

Gong, Zhimin;Qian, Li;Shao, Shuai;Fan, Bo;Peng, Jianbiao;Lu, Kun;Gao, Shixiang research published 《 Effects of solvent composition on the synthesis of polydopamine Schiff base Cu complex to activate peroxymonosulfate for methyl-paraben degradation》, the research content is summarized as follows. Solvent composition plays an important role in the synthesis of metal complex materials, but to date little work on this issue has been reported. Herein, a unique Schiff base Cu complex catalyst (DPDA-Cu-95EtOH) was designed based on polydopamine (PDA) and 3, 5-dibromosalicylaldehyde (DBSA), and the influence of H₂O added during the synthesis process on its catalytic performance towards peroxymonosulfate (PMS) activation was comprehensively investigated. Our results demonstrated that adding a small amount (5%, v:v) of H₂O to the solvent absolute ethanol (EtOH) can greatly increase the Cu loading (from 3.56 at% to 10.30 at%) on the catalyst, which significantly enhanced its catalytic ability, and promoted the removal of MeP for about 4.6 times higher than that synthesized without addition of H₂O. ESR (EPR) and quenching tests revealed that ¹O₂, OH and SO^–₄ were responsible for the degradation of Methyl-paraben (MeP). Moreover, the DPDA-Cu-95EtOH/PMS system not only showed excellent stability and reusability, but also exhibited considerable removal efficiency of MeP in real wastewater. Overall, this study provides new insights into the controllable synthesis of Schiff base metal complex used for the efficient activation of PMS to remove micropollutants in wastewater.

COA of Formula: C7H4Br2O2, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gan, Jianbo team published research in ChemistrySelect in 2021 | 90-59-5

Related Products of 90-59-5, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

Organic compounds having carbon bonded to bromine are called organic bromides. 90-59-5, formula is C7H4Br2O2, Name is 3,5-Dibromo-2-hydroxybenzaldehyde. Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Related Products of 90-59-5.

Gan, Jianbo;Luo, Naili;Wu, Chengjun;Wan, Xinyi;Wang, Cunde research published 《 Efficient Synthesis of Chromeno[4,3,2-de][1,6]naphthyridine Derivatives via Pseudo Four-Component Reaction》, the research content is summarized as follows. A novel approach for the synthesis of substituted 5-amino-4-cyanochromeno[4,3,2-de][1,6]naphthyridine-1-carboxylates I [R¹ = H, 8-OEt, 10-Cl, etc.; R² = Me, Ph, 4-FC₆H₄, 4-BrC₆H₄; R³ = Me, Et] from a wide range of substituted 2-hydroxybenzaldehydes with alkyl 3-oxo-3-substituted propanoates and malononitrile was investigated via propionic acid-promoted cascade Knoevenagel condensation/Michael addition/intramolecularly nucleophilic addition accompanied by oxidative aromatization. This procedure provided a highly efficient and facile route to functionalized chromenonaphthyridines from readily available substrates under mild reaction conditions.

Related Products of 90-59-5, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Fok, Emily Y. team published research in Polyhedron in 2021 | 90-59-5

90-59-5, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

Fok, Emily Y.;Show, Veronica L.;Johnson, Adam R. research published 《 Intramolecular hydroamination of trisubstituted aminoallenes catalyzed by titanium complexes of diaryl substituted tridentate imine-diols》, the research content is summarized as follows. The authors’ laboratory has developed catalysts based on earth abundant Ti for asym. reactions including intramol. hydroamination. Previously, Ti complexes of imine diol ligands showed improved enantioselectivity relative to complexes with bidentate amino alc. ligands. As the catalyst with the highest selectivity had di-tert-Bu substitution, the authors sought to increase the steric protection by preparing three new ligands with diaryl substitution. These ligands were readily prepared in two steps: 1st, synthesis of diaryl substituted salicylaldehydes by a Suzuki coupling and 2nd, a Schiff base condensation with a chiral amino alc. After characterizing the ligands, in situ hydroamination/cyclization with 6-methyl-hepta-4,5-dienylamine was carried out at 105-135° to give exclusively 2-(2-methyl-propenyl)-pyrrolidine with enantioselectivity up to 22%ee. Unexpected dimerization of the catalyst resulted in reduced activity, so the reaction required a catalyst loading of 10-20%.

90-59-5, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Fadeev, Alexander A. team published research in Organic Chemistry Frontiers in 2022 | 90-59-5

Category: bromides-buliding-blocks, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine. 90-59-5, formula is C7H4Br2O2, Name is 3,5-Dibromo-2-hydroxybenzaldehyde, Category: bromides-buliding-blocks

Fadeev, Alexander A.;Makarov, Anton S.;Ivanova, Olga A.;Uchuskin, Maxim G.;Trushkov, Igor V. research published 《 Extended Corey-Chaykovsky reactions: transformation of 2-hydroxychalcones to benzannulated 2,8-dioxabicyclo[3.2.1]octanes and 2,3-dihydrobenzofurans》, the research content is summarized as follows. The divergent synthesis of benzannulated 2,8-dioxabicyclo[3.2.1]octanes I [R¹ = H, 4-NO₂, 4-Cl, etc.; R² = Ph, 4-MeC₆H₄, 4-FC₆H₄, etc.] and 2,3-dihydrobenzofurans II [X= H, 4-NO₂, 4-Cl, etc.; R¹ = Ph, 4-MeC₆H₄, 4-FC₆H₄, etc.] using the concept of extended Corey-Chaykovsky reactions was reported. With this concept, 2-hydroxychalcones were treated with the Corey ylide providing highly reactive donor-acceptor cyclopropanes that were introduced in a one pot manner for further transformations. We demonstrated that the nucleophilic three-membered ring opening followed by cyclization under mild reaction conditions afforded the 2,8-dioxabicyclo[3.2.1]octane scaffold. On the other hand, heating the intermediates with a strong Bronsted acid furnished 2-phenacyl-2,3-dihydrobenzofurans. These transformations, resulting in products with crucially different heterocyclic skeletons from the same starting compounds, demonstrate the enormous potential of the extended Corey-Chaykovsky reaction.

Category: bromides-buliding-blocks, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

El-Attar, Mona team published research in Journal of Coordination Chemistry in 2021 | 90-59-5

Synthetic Route of 90-59-5, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

El-Attar, Mona;Aazam, Elham research published 《 Redox behavior, spectroscopic investigations, theoretical interpretation and biological effectiveness of some novel prepared bis-azomethine derivatives and their copper(II) complexes》, the research content is summarized as follows. Three new bis-azomethine derivatives were synthesized in a good yield, along with their copper(II) complexes and confirmed by IR, ¹³C-NMR, ¹H-NMR, MS, ESR, powder XRD and UV-visible spectroscopy. The spectral studies indicated that the ligands in all complexes act as dibasic tetradentate, coordinated through two azomethine nitrogen and two deprotonated phenolic oxygen atoms. Square planar geometries were assigned for Cu(II) complexes in monomeric structures. Also, quantum chem. calculations using DFT were conducted to elucidate the effect of quantum chem. parameters on the mol. and electronic structures of the mols. under consideration, and then confirming their electrochem. behavior and biol. effectiveness. There were good correlations between practical and theor. studies. The redox pathway of bis-azomethine derivatives and their Cu(II) complexes was elucidated and confirmed based on exptl. and theor. calculations In vitro antimicrobial effectiveness of the synthesized three ligands and their Cu(II) complexes exhibited varying degrees of inhibitory effect on the growth of the test pathogenic microorganisms, confirming that antimicrobial efficiency is dependent on the mol. structure of the prepared compounds and their liposoly. The MIC was also determined for the compound H₂L_c which exhibited the highest antimicrobial activity against each of Pseudomonas aeruginosa (G-) and Candida albicans.

Synthetic Route of 90-59-5, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Di, Jia-Qi team published research in Current Organic Synthesis in 2021 | 90-59-5

Application In Synthesis of 90-59-5, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

Di, Jia-Qi;Wang, Hao-Jie;Cui, Zhen-Shui;Hu, Jin-Yong;Zhang, Zhan-Hui research published 《 Catalyst-free Synthesis of Aminomethylphenol Derivatives in Cyclopentyl Methyl Ether via Petasis Borono-Mannich Reaction》, the research content is summarized as follows. In order to establish an effective synthetic method for preparing aminomethylphenol derivatives, the Petasis borono-Mannich reaction of salicylaldehyde, phenylboronic acid and 1,2,3,4-tetrahydroisoquinoline was selected as a model reaction. A variety of reaction conditions are investigated, including solvent and temperature The generality and limitation of the established method were also evaluated. It was found that model reaction can be carried out in cyclopentyl Me ether at 80^o under catalyst-free conditions. This protocol, with broad substrate applicability, the reaction of various arylboronic acid, secondary amine and salicylaldehyde proceeded smoothly under optimal reaction conditions to afford various aminomethylphenol derivatives in high yields. A practical, scalable, and high-yielding synthesis of aminomethylphenol derivatives was successfully accomplished.

Application In Synthesis of 90-59-5, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kalach, A V’s team published research in Russian Chemical Bulletin in 2006-02-28 | 603-78-1

Russian Chemical Bulletin published new progress about Algorithm. 603-78-1 belongs to class bromides-buliding-blocks, and the molecular formula is C7H4Br2O2, Reference of 603-78-1.

Kalach, A. V. published the artcile< Using artificial neural networks for prediction of organic acid partition coefficients>, Reference of 603-78-1, the main research area is artificial neural network prediction organic acid partition.

Aqueous/organic phase partition coefficients of organic acids were predicted using an artificial neural network (ANN) algorithm taking benzoic acid derivatives as examples. The partition coefficients were determined by extraction of the acids from aqueous salt solutions with hydrophilic solvents (BunOH, BuiOH, and ButOH). Using the ANN approach makes it possible to obtain quant. information on the values of the title parameters.

Russian Chemical Bulletin published new progress about Algorithm. 603-78-1 belongs to class bromides-buliding-blocks, and the molecular formula is C7H4Br2O2, Reference of 603-78-1.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kim, Jin-Hyoung’s team published research in Inorganic Chemistry in 2019-12-02 | 2252-45-1

Inorganic Chemistry published new progress about Crystal structure. 2252-45-1 belongs to class bromides-buliding-blocks, and the molecular formula is C7H4BrF3S, Electric Literature of 2252-45-1.

Kim, Jin-Hyoung; Kim, So-Yoen; Jang, Seol; Yi, Seungjun; Cho, Dae Won; Son, Ho-Jin; Kang, Sang Ook published the artcile< Blue Phosphorescence with High Quantum Efficiency Engaging the Trifluoromethylsulfonyl Group to Iridium Phenylpyridine Complexes>, Electric Literature of 2252-45-1, the main research area is iridium trifluoromethylsulfonylphenylpyridine complex synthesis crystal mol structure blue phosphorescence; cyclic voltammetry iridium trifluoromethylsulfonylphenylpyridine complex.

Incorporation of an electron-withdrawing – SO2CF3 substituent to cyclometalating CN̂-phenylpyridine (ppy) ligand resulted in an expected blue-shifted phosphorescence in the corresponding homoleptic Ir(ppySCF3)3 complex, showing the emission of λem = 464 nm at 300 K. One of its heteroleptic derivatives, modified by a pyrazolyl borate LX ligand, Ir(ppySCF3)2(bor), exhibited further blue-shifted phosphorescence of λem = 460 nm at 300 K. Cyclic voltammograms (CVs) and d.-functional theory (DFT) calculations supported the efficacy of the electron-withdrawing capability of the SO2CF3 substituent lowering HOMO energy, and obtained widened bandgaps and resumed blue emissions for all of the Ir complexes studied. The homoleptic complexes of both substituents, Ir(ppySCF3)3 and Ir(ppySF)3, reached the higher quantum yields (ΦPL) of (0.89 and 0.72), resp. Similarly, emission quantum yields (ΦPL) of the heteroleptic derivatives were reported to be (0.75, 0.83, and 0.87) for Ir(ppySCF3)2(acac), Ir(ppySCF3)2(bor), and Ir(ppySCF3)2(pic), resp. Emission kinetics support the enhanced quantum efficiency when kr and knr values are compared between Ir(ppySCF3)3 and Ir(ppySF)3, and both values favorably contribute to attaining a higher quantum efficiency for Ir(ppySCF3)3. Among solution-processed multilayered devices having an ITO/PEDOT:PSS/TCTA:Ir dopant (10:1, weight/weight)/TmPyPB/Liq/Al structure, a heteroleptic dopant, Ir(ppySCF3)2(bor), exhibited better device performance, reporting an external quantum efficiency (EQE) of 1.14%, current efficiency (CE) of 2.31 cd A-1, and power efficiency (PE) of 1.21 lm W1-, together with blue chromaticity of CIEx,y = (0.16, 0.32). Blue phosphorescence of Ir(III) complexes can be tuned with the introducing of strong electron withdrawing substituents and the variation in the ancillary ligands. Crystallog. data are given.

Inorganic Chemistry published new progress about Crystal structure. 2252-45-1 belongs to class bromides-buliding-blocks, and the molecular formula is C7H4BrF3S, Electric Literature of 2252-45-1.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Ankun’s team published research in Journal of Organic Chemistry in 2021-01-01 | 2252-45-1

Journal of Organic Chemistry published new progress about Aromatic compounds, azo Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 2252-45-1 belongs to class bromides-buliding-blocks, and the molecular formula is C7H4BrF3S, Recommanded Product: (3-Bromophenyl)(trifluoromethyl)sulfane.

Li, Ankun; Li, Yuxuan; Liu, Junjie; Chen, Jingqi; Lu, Kui; Qiu, Di; Fagnoni, Maurizio; Protti, Stefano; Zhao, Xia published the artcile< Metal-Free Trifluoromethylthiolation of Arylazo Sulfones>, Recommanded Product: (3-Bromophenyl)(trifluoromethyl)sulfane, the main research area is fluoromethylthiolation arylazo sulfone fluoromethyl arylsulfonothioate.

A visible-light-driven protocol for the synthesis of aryl trifluoromethyl thioethers under photocatalyst- and metal-free conditions has been pursued. The procedure exploits the peculiar properties of arylazo sulfones (having electron-rich or electron-poor substituents on the (hetero)aromatic ring) as photochem. precursors of aryl radicals and S-trifluoromethyl arylsulfonothioates as easy-to-handle trifluoromethylthiolating agents.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Grasel, Fabio Dos Santos’s team published research in International Journal of Quantum Chemistry in 2012 | 639520-70-0

International Journal of Quantum Chemistry published new progress about Bond angle, dihedral. 639520-70-0 belongs to class bromides-buliding-blocks, and the molecular formula is C12H16BrNO2, Name: tert-Butyl (4-bromophenyl)(methyl)carbamate.

Grasel, Fabio Dos Santos; Charao De Oliveira, Tiago; Fontoura, Luiz Antonio Mazzini; Rigotti, Italo Jose Da Cruz; Netz, Paulo Augusto published the artcile< N-arylamides and N-arylcarbamates N-CO internal rotation barrier study by molecular modeling>, Name: tert-Butyl (4-bromophenyl)(methyl)carbamate, the main research area is arylamide arylcarbamate internal rotation barrier mol modeling.

Amides and carbamates present an energetic barrier associated to N-C(O) bond rotation, which determines two different equilibrium geometries. In this work, the conformational equilibrium of formanilide, acetanilide, Me and t-Bu phenylcarbamates, and their N-methylderivatives was studied by AM1 and B3LYP/6-31G(d,p) calculations The effect of aryl p-substituents (MeO, Me, Cl, Br, CN, and NO2) was also studied. Amide barriers were found by DFT calculation between 12 and 21 kcal/mol. Carbamates, on the other hand, showed barriers between 11 and 15 kcal/mol. AM1 underestimates the energetic barriers and provides values around half those obtained by B3LYP/6-31G(d,p) calculations Electron withdrawing substituents on aryl group decrease the barrier. © 2011 Wiley Periodicals, Inc. Int J Quantum Chem, 2012.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary