Category: bromides-buliding-blocks

Chen, Xiaohan published the artcileRedox deracemization of α-substituted 1,3-dihydroisobenzofurans, Computed Properties of 74317-85-4, the main research area is alpha substituted dihydroisobenzofuran preparation enantioselective; dihydroisobenzofuran alpha substituted one pot redox resolution.

Chiral α-substituted 1,3-dihydroisobenzofurans are key scaffolds in a number of bioactive natural products and synthetic pharmaceuticals. However, catalytic asym. approaches have been rarely developed. Here, a redox deracemization technol. is adopted to address the catalytic asym. synthesis. A broad range of α-aryl substituted 1,3-dihydroisobenzofurans are effectively deracemized in high efficiency with excellent ee. α-alkynyl substituted ethers were also compatible with the deracemization technol.

Chinese Chemical Letters published new progress about Benzenecarboxylic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 74317-85-4 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxybenzoic acid, and the molecular formula is C8H7BrO3, Computed Properties of 74317-85-4.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yan, Qiaozhi published the artcileRh-Catalyzed Asymmetric Hydrogenation of α,β- and β,β-Disubstituted Unsaturated Boronate Esters, Product Details of C8H6BrFO2, the main research area is phenethyl boronate chiral preparation styrylboronate asym hydrogenation rhodium catalyst; chiral amine alc preparation asym hydrogenation styrylboronate oxidation amination; asymmetric catalysis; asymmetric hydrogenation; chiral boronate; enantioselectivity; unsaturated boronates.

Chiral phenethyl boronates ArCHRCH2Bpin and ArCH2CHRBpin were prepared by asym. hydrogenation of α- and β-substituted β-styrylboronates. A highly enantioselective hydrogenation of α,β-unsaturated boronate esters catalyzed by Rh-(S)-DTBM-Segphos complex has been developed. Both (Z)-α,β- and β,β-disubstituted substrates can be successfully hydrogenated to afford chiral boronates with excellent enantioselectivities, up to 98% ee. Furthermore, the obtained chiral boronate esters, as important versatile synthetic intermediates are successfully transformed to the corresponding chiral alcs., amines and other important derivatives with maintained enantioselectivities.

Chemistry – A European Journal published new progress about Alcohols, chiral Role: SPN (Synthetic Preparation), PREP (Preparation). 647020-71-1 belongs to class bromides-buliding-blocks, name is Methyl 2-bromo-3-fluorobenzoate, and the molecular formula is C8H6BrFO2, Product Details of C8H6BrFO2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Leyva-Perez, Antonio published the artcileOxyhalogenation of Activated Arenes with Nanocrystalline Ceria, Name: 1-Bromo-3-(3-bromopropoxy)propane, the main research area is nanocrystalline ceria oxyhalogenation activated arene.

Arenes can be chlorinated, brominated, and iodinated in the presence of CeO2 nanoparticles under aerobic conditions. In a biomimetic approach, active electrophilic halogen species are generated from either organic or inorganic halogen compounds and are trapped by arenes. This C-H transformation can be applied to the synthesis of naturally occurring products.

ACS Catalysis published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 58929-72-9 belongs to class bromides-buliding-blocks, name is 1-Bromo-3-(3-bromopropoxy)propane, and the molecular formula is C6H12Br2O, Name: 1-Bromo-3-(3-bromopropoxy)propane.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gao, Guangpeng published the artcileEnantiomeric discrimination of α-hydroxy acids and N-Ts-α-amino acids by 1H NMR spectroscopy, Category: bromides-buliding-blocks, the main research area is hydroxy acid enantiomeric discrimination proton NMR spectroscopy; protected amino acid enantiomeric discrimination proton NMR spectroscopy; chiral solvating agent amino amido phenolic hydroxy group containing.

A new kind of chiral compounds with multiple amino, amido and phenolic hydroxy groups was synthesized from D-phenylalanine and D-phenylglycine, resp. The enantiomeric discriminations of α-hydroxy acids and N-Ts-α-amino acids were finished in the presence of the above chiral compounds as chiral solvating agents by 1H NMR spectroscopy. The chiral compounds are highly effective and practical chiral solvating agents towards α-hydroxy acids and N-Ts-α-amino acids.

Tetrahedron Letters published new progress about Amino acids, N-protected Role: ANT (Analyte), ANST (Analytical Study). 156089-67-7 belongs to class bromides-buliding-blocks, name is 4,5-Dibromo-2-hydroxybenzaldehyde, and the molecular formula is C7H4Br2O2, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Cruz, Cole L. published the artcileNickel-catalyzed reductive coupling of unactivated alkyl bromides and aliphatic aldehydes, Formula: C14H20BBrO3, the main research area is aliphatic aldehyde alkyl bromide reductive coupling nickel catalyst; silyl secondary alc preparation.

A mild, convenient coupling of aliphatic aldehydes e.g., BnCH2CHO and unactivated alkyl bromides e.g., Br(CH2)3C(O)OEt has been developed. The catalytic system features the use of a common Ni(II) precatalyst and a readily available bioxazoline ligand and affords silyl-protected secondary alcs. e.g., BnCH2CH(OTES)(CH2)3C(O)OEt. The reaction is operationally simple, utilizes Mn as a stoichiometric reductant, and tolerates a wide range of functional groups. The use of 1,5-hexadiene as an additive is an important reaction parameter that provides significant benefits in yield optimizations. Initial mechanistic experiments support a mechanism featuring an alpha-silyloxy Ni species that undergoes formal oxidative addition to the alkyl bromide via a reductive cross-coupling pathway.

Chemical Science published new progress about Aliphatic aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 913836-27-8 belongs to class bromides-buliding-blocks, name is 2-(4-(2-Bromoethoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C14H20BBrO3, Formula: C14H20BBrO3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Lalitha, R. published the artcilePhytochemical analysis of Scinaia bengalica by GCMS, COA of Formula: C12H23BrO2, the main research area is Scinaia marine extract phytochem GCMS.

Marine red algae consist of various medicinal activities. Marine sources are more active than the other natural sources. One of the most important red algae is Scinaia Bengalica (SB) known for its phytochem. anal. by GC-MS revealed 19 chem. constituents. SB consist major constituents like oleic acid, octanoic acid, 2 hexyl-1-octanol,hexadecanol, calcitriol, bromine compounds

International Journal of MediPharm Research published new progress about High resolution gas chromatography-high resolution mass spectrometry. 55099-31-5 belongs to class bromides-buliding-blocks, name is Ethyl 10-bromodecanoate, and the molecular formula is C12H23BrO2, COA of Formula: C12H23BrO2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Dinesh, Chimmanamada U. published the artcileCatalytic halogenation of selected organic compounds mimicking vanadate-dependent marine metalloenzymes, Recommanded Product: 2-Bromobenzene-1,3,5-triol, the main research area is halogenation mimic vanadate marine metalloenzyme; benzene halogenation mimic vanadate marine metalloenzyme; benzentriol halogenation mimic vanadate marine metalloenzyme; iodination mimic vanadate marine metalloenzyme; chlorination mimic vanadate marine metalloenzyme; fluorination mimic vanadate marine metalloenzyme; bromination mimic vanadate marine metalloenzyme.

The ammonium metavanadate, mimicking vanadate-dependent metalloenzymes, efficiently catalyzes the halogenation of a variety of organic substrates in dilute conditions in moderate to good yields using dilute hydrogen peroxide (30%) as an oxidizing agent exhibiting remarkable ortho selectivity with electron-rich aromatic compounds Bromination of 1,3,5-benzenetriol (ammonium vanadate/hydrogen peroxide) gave 2-bromo-1,3,5-benzenetriol in 75% yield.

Journal of the Chemical Society, Chemical Communications published new progress about Aromatic compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 84743-77-1 belongs to class bromides-buliding-blocks, name is 2-Bromobenzene-1,3,5-triol, and the molecular formula is C6H5BrO3, Recommanded Product: 2-Bromobenzene-1,3,5-triol.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wei, Dong published the artcileSynthesis of Substituted Naphthalenes by 1,4-Palladium Migration Involved Annulation with Internal Alkynes, SDS of cas: 74317-85-4, the main research area is naphthalene preparation; alkyne bromo vinylbenzene palladium migration annulation.

The palladium catalyzed annulation of 1-bromo-2-vinylbenzene derivatives with internal alkynes was realized for the efficient synthesis of substituted naphthalenes such as I [ R1 = Me, 2-thienyl, Ph, etc.; R2 = 7-Me, 7-OMe, 7-F, etc.; R3 = R4 = Me, 2-thienyl, Ph, etc.]. A controllable aryl to vinylic 1,4-palladium migration process was the key for success of this transformation. A wide variety of substituted naphthalene compounds were prepared in good to excellent yields.

Chinese Journal of Chemistry published new progress about Alkynes, internal Role: RCT (Reactant), RACT (Reactant or Reagent). 74317-85-4 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxybenzoic acid, and the molecular formula is C8H7BrO3, SDS of cas: 74317-85-4.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Garcia-Gonzalez, Ma. Carmen published the artcileUgi-derived dehydroalanines as a pivotal template in the diversity oriented synthesis of aza-polyheterocycles, Related Products of bromides-buliding-blocks, the main research area is benzopyrrolizidinone benzoindolizidinone pyrazinoisoquinoline pyrazionoisoquinolindione preparation.

Various readily available, Ugi-derived dehydroalanines were used as pivotal templates to easily and efficiently assemble diverse pharmacol. important polyheterocyclic systems through a cascade palladium-catalyzed C-C bond formation processes (tandem reaction). Allyl, homoallyl and propargyl amine led to the formation of benzopyrrolizidinone derivatives, benzoindolizidinone derivatives and pyrazinoisoquinoline derivatives, resp., while benzylamines and o-bromobenzylamine were used as precursors of tetracyclic-fused systems and pyrazionoisoquinolindione derivatives Under optimized conditions the synthesis of the target compounds was achieved using dichlorobis(triphenylphosphine)palladium as a catalyst. Starting materials included 2-propen-1-amine (allyl amine), 2-iodobenzoic acid derivatives 2-bromobenzoic acid derivatives, 2-(benzoyloxy)acetaldehyde, isocyanides (isonitriles), 3-buten-1-amine (homoallyl amine). Dehydro amino acid amides (dehydroalanine derivatives) intermediates included N-[1-[[(1,1-dimethylethyl)amino]carbonyl]ethenyl]-2-iodo-N-(phenylmethyl)benzamide, thiophene derivatives, furan derivatives, pyrrole derivatives, indole derivatives The title compounds thus formed included (methylene)(oxo)pyrrolo[2,1-a]isoindolecarboxamides, (methylene)(oxo)pyrido[2,1-a]isoindolecarboxamides, isoindolo[2,1-b]isoquinolinecarboxamides, pyrazino[1,2-b]isoquinolinedione derivatives.

Chemical Communications (Cambridge, United Kingdom) published new progress about Amines, propargyl Role: RCT (Reactant), RACT (Reactant or Reagent). 74317-85-4 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxybenzoic acid, and the molecular formula is C8H7BrO3, Related Products of bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Izmer, Vyatcheslav V. published the artcilePalladium-Catalyzed Pathways to Aryl-Substituted Indenes: Efficient Synthesis of Ligands and the Respective ansa-Zirconocenes, SDS of cas: 880652-93-7, the main research area is Pd catalyzed coupling reaction bromoindene aryl halide; crystal structure bisindenylsilyl bridging chiral ansazirconocene methoxyindenylboronic acid; mol structure bisindenylsilyl bridging chiral ansazirconocene methoxyindenylboronic acid; indenylboronic acid Suzuki coupling aryl halide.

Substituted 4-/7-halo-1H-indenes and 5-methyl-3-bromo-4-/6H-cyclopenta[b]thiophenes are convenient starting materials for Suzuki-Miyaura, Negishi, and Murahashi protocols to give the corresponding aryl-substituted indenes and cyclopenta[b]thiophenes of importance for further synthesis of ansa-metallocenes. Alternatively, (2-methyl-1H-inden-4-yl)boronic acid and (1-methoxy-2-methyl-2,3-dihydro-1H-inden-4-yl)boronic acid as well as the resp. organozinc and -Mg reagents can be used for synthesizing aryl-substituted indenes via the Pd-catalyzed reactions with aryl halides. These synthetic methods have a very broad scope to afford libraries of aryl-substituted indenes. Finally, synthesis and structure characterization of several representative chiral ansa-zirconocenes, potentially useful as components of highly active and stereoselective olefin polymerization catalysts, were performed.

Organometallics published new progress about Aryl halides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 880652-93-7 belongs to class bromides-buliding-blocks, name is 7-Bromo-2-methyl-1H-indene, and the molecular formula is C10H9Br, SDS of cas: 880652-93-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary