Category: bromides-buliding-blocks

Liu, Hui-Yan published the artcileAssembly of Two Metal-Organic Frameworks Based on Distinct Cobalt Dimeric Building Blocks Induced by Ligand Modification: Gas Adsorption and Magnetic Properties, Related Products of bromides-buliding-blocks, the main research area is cobalt pyridinylbenzoate preparation porosity gas adsorption enthalpy antiferromagnetic exchange; crystal structure cobalt pyridinylbenzoate dimeric building block MOF.

Solvothermal reaction of 3,5-di(pyridin-4-yl)benzoic acid (HDPB) with Co(II) leads to a novel metal-organic framework, [Co2O(DPB)2(DMF)2]·xS (1), which represents a rare reo-type net with trigonal prismatic Co dimer, [Co2O(CO2)2N4] as building blocks to construct a 3-dimensional framework containing three different types of nanoscale M12L12 and M24L12 polyhedron cages. More interestingly, under the same condition, the assembly of 4-methyl-3,5-di(pyridin-4-yl)benzoic acid (HMDPB) with Co(II) facilitates the formation of a cationic framework, [Co2(MDPB)3(DMF)](NO3)·xS (2), with Co dimer, [Co2(CO2)3N4], as building blocks. Complex 2 represents the 1st example of a zeolite-like network with 48-nuclear SOD cage. The significant effect of subtle modification of ligand on the overall MOFs is discussed. Also, the gas adsorption studies reveal that 1 exhibits permanent porosity and selective CO2 uptake. Variable-temperature magnetic susceptibility measurements show that both 1 and 2 exhibit antiferromagnetic behavior.

Inorganic Chemistry published new progress about Adsorption enthalpy, isosteric. 74896-66-5 belongs to class bromides-buliding-blocks, name is Methyl 3,5-dibromo-4-methylbenzoate, and the molecular formula is C9H8Br2O2, Related Products of bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sarma, Jagarlapudi A. R. P. published the artcileSolid state nuclear bromination with N-bromosuccinimide. Part 1. Experimental and theoretical studies on some substituted aniline, phenol and nitro aromatic compounds, Quality Control of 10172-35-7, the main research area is aniline solid state nuclear bromination bromosuccinimide exptl theor; nitro aromatic solid state ring bromination bromosuccinimide exptl theor; phenol solid state nuclear bromination bromosuccinimide exptl theor.

Solid state bromination of a number of substituted phenol, aniline and nitro aromatic compounds with N-bromosuccinimide yields exclusively the nuclear brominated products. Reactivity in the solid state depends on the reaction time, temperature and nature of the substituent on the substrate. The reaction apparently proceeds by an electrophilic aromatic substitution pathway. MO and reaction free energy calculations also support such a view. Thermal anal. and video microscopic observation reveal the nature of the solid state reaction. Crystallinity is required for the reactivity and product selectivity. Product yield decreases with loss of selectivity when the reaction is carried out in a melt or in solution Unlike the topochem. solid state reactions wherein mol. packing is more important than the intrinsic reactivity, these reactions demonstrate the importance of both these factors.

Perkin 2 published new progress about AM1 (molecular orbital method). 10172-35-7 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxy-6-nitroaniline, and the molecular formula is C7H7BrN2O3, Quality Control of 10172-35-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Huo, Zhaohui published the artcileCopolymeric films obtained by electropolymerization of porphyrins and dipyridyl-spacers including Dawson-type polyoxometalates, Product Details of C9H8Br2O2, the main research area is polyoxometalate porphyrin copolymer electropolymerization oxidation reduction potential.

This paper reports the formation of hybrid polyoxometalate-porphyrin copolymeric films obtained by the electro-oxidation of zinc-β-octaethylporphyrin (ZnOEP) in the presence of a functionalized Dawson-type polyoxometalate bearing two pyridyl groups (POMdbme3,3, Py-POM-Py) which will be compared to the copolymer obtained from ZnOEP and a dipyridyl compound without POM (ibme3,3). The resulting film has been characterized by UV-visible absorption spectroscopy, XPS, and at. force microscopy. Electrochem. quartz crystal microbalance was employed to investigate the poly-porphyrin-POMs deposition mass.

Journal of Solid State Electrochemistry published new progress about Electrochemical polymerization. 74896-66-5 belongs to class bromides-buliding-blocks, name is Methyl 3,5-dibromo-4-methylbenzoate, and the molecular formula is C9H8Br2O2, Product Details of C9H8Br2O2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hollas, Michael A. published the artcileA Bifunctional Spin Label for Ligand Recognition on Surfaces, Related Products of bromides-buliding-blocks, the main research area is bifunctional spin ligand recognition surfaces; EPR spectroscopy; carbohydrates; nanoparticles; sensors; spin labels.

In situ monitoring of biomol. recognition, especially at surfaces, still presents a significant tech. challenge. ESR of biomols. spin-labeled with nitroxides can offer uniquely sensitive and selective insights into these processes, but new spin-labeling strategies are needed. The synthesis and study of a bromoacrylaldehyde spin label (BASL), which features two attachment points with orthogonal reactivity is reported. The first examples of mannose and biotin ligands coupled to aqueous carboxy-functionalized gold nanoparticles through a spin label are presented. EPR spectra were obtained for the spin-labeled ligands both free in solution and attached to nanoparticles. The labels were recognized by the mannose-binding lectin, Con A, and the biotin-binding protein avidin-peroxidase. Binding gave quantifiable changes in the EPR spectra from which binding profiles could be obtained that reflect the strength of binding in each case.

Angewandte Chemie, International Edition published new progress about ESR (electron spin resonance). 352351-55-4 belongs to class bromides-buliding-blocks, name is (9H-Fluoren-9-yl)methyl (2-aminoethyl)carbamate hydrobromide, and the molecular formula is C17H19BrN2O2, Related Products of bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Geddes, C. D. published the artcileFluorescent indolium dyes for applications in aqueous halide sensing-part 2: the repeated alkylation of Harmane post quaternisation, HPLC of Formula: 56523-59-2, the main research area is carboxyoctylation quaternization harmane fluorescent dye hallucinogen; methoxyquinoline carboxyoctylation quaternization.

The repeated alkylation of harmane (1-methyl-9H-pyrido[3,4-b]indole) after quaternization has been observed during fusion with 8-bromooctanoic acid (I). This can be explained by two possible competing mechanisms, the electrophilic addition of carboxyalkylating agent to the resonance enamine form of the initial quaternized product and/or oligoester formation between the quaternized product and I. The mechanisms are supported by 1H NMR, FTIR, and mass spectrometry anal., and by carboxyoctylation of 6-methoxyquinoline. The possibility for controlling the repeated alkylation in nanometer size silica pores, in essence restricted geometry nanometer size reaction vessels, is discussed.

Dyes and Pigments published new progress about Carboxyalkylation (repeated). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, HPLC of Formula: 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Lai, Holden W. H. published the artcileFunctionalized Rigid Ladder Polymers from Catalytic Arene-Norbornene Annulation Polymerization, Recommanded Product: Methyl 3,5-dibromo-4-methylbenzoate, the main research area is ladder polymer arene norbornene annulation polymerization.

Rigid ladder polymers represent a unique polymer architecture but have limited synthetic accessibility and structural diversity. Using catalytic arene-norbornene annulation (CANAL) polymerization, we synthesized ladder polymers consisting of rigid and kinked norbornyl benzocyclobutene backbones and bearing various functional groups, such as alc., amine, ester, carbamate, amide, benzyl bromide, azide, and heterocycles. The incorporation of functional groups was achieved by either copolymerization of functionalized ladder-type dinorbornenes or postpolymn. functionalization. Functionalization of ladder polymers allows modification of their solubility, compatibility, and other properties, expanding their utilities. These ladder polymers remain microporous and highly glassy, which are desirable for separation and high-temperature applications.

ACS Macro Letters published new progress about Cyclization (polymerization). 74896-66-5 belongs to class bromides-buliding-blocks, name is Methyl 3,5-dibromo-4-methylbenzoate, and the molecular formula is C9H8Br2O2, Recommanded Product: Methyl 3,5-dibromo-4-methylbenzoate.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Goeschke, Richard published the artcileThe nonchiral bislactim diethoxy ether as a highly stereo-inducing synthon for sterically hindered, γ-branched α-amino acids: A practical, large-scale route to an intermediate of the novel renin inhibitor aliskiren, Safety of 2-(3-Methoxypropoxy)-4-((R)-2-(bromomethyl)-3-methylbutyl)-1-methoxybenzene, the main research area is gamma branched amino acid aliskiren intermediate preparation; stereoslective alkylation gamma branched amino acid preparation.

The diastereoselective synthesis of the sterically hindered, γ-branched α-amino acid derivative, I (R = CO2CMe3), and its N-[(tert-butoxy)carbonyl](Boc)-protected alc., both key intermediates of a novel class of nonpeptide renin inhibitors such as aliskiren, is described. Initially, the analogous Me ester was obtained by alkylation of the chiral Schoellkopf dihydropyrazine with a dialkoxy-substituted alkyl bromide, which proceeded with explicitly high diastereofacial selectivity (ds ≥98%) to give II, followed by mild acid hydrolysis and N-Boc protection. Conversely, the complete lack of stereocontrol and poor yields suggested, in addition to the anticipated shielding effect by the iPr group at C(2) of the auxiliary, steric repulsion between the MeO-C(6) and bulky residues in the proposed transition state, which would strongly disfavor both the Si and Re attack of the electrophile. Based on this rationale, alkylation of a readily accessible achiral diethoxy-dihydropyrazine was found to provide a 95:5 mixture of the product diastereoisomers in high yield, which afforded in two steps and after recrystallization enantiomerically pure I (R = CO2CMe3). Similarly, the stereochem. course for the alkylation reactions of the related alkyl bromides was investigated. The precursor bromides were efficiently synthesized via the diastereoselective alkylation of the Evans 3-isovaleroyloxazolidin-2-ones either with a bromide or with benzyl chloromethyl ether, and subsequent standard transformations. A practical and economical protocol of the preparation of I (R = CO2CMe3) on a multi-100-g scale is given. This is the first report of the application of an achiral dihydropyrazine, as a highly stereo-inducing synthon providing rapid access to a N-protected γ-branched α-amino acid with (2S) absolute configuration.

Helvetica Chimica Acta published new progress about Alkylation, stereoselective. 172900-69-5 belongs to class bromides-buliding-blocks, name is 2-(3-Methoxypropoxy)-4-((R)-2-(bromomethyl)-3-methylbutyl)-1-methoxybenzene, and the molecular formula is C17H27BrO3, Safety of 2-(3-Methoxypropoxy)-4-((R)-2-(bromomethyl)-3-methylbutyl)-1-methoxybenzene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Geddes, Chris D. published the artcileNew fluorescent indolium and quinolinium dyes for applications in aqueous halide sensing, SDS of cas: 56523-59-2, the main research area is fluorescent cationic dye preparation halide sensor.

Bromide and teraphenylborate salts of six new highly fluorescent dyes, produced by the reaction of two heterocyclic nitrogen bases (6-methoxyquinoline and harman) with 8-bromooctanoic acid, 11-bromoundecanoic acid, and 15-bromopentadecanoic acid have been prepared Unlike the bases themselves, the quaternary salts are water soluble and have fluorescence characteristics independent of pH in the range 7-11. Both the fluorescence intensity and fluorescence lifetime of these dyes are reduced in the presence of aqueous halide ions, allowing halide concentrations to be determined accurately at concentrations of importance to both medicine and industry. All the dyes have been characterized in terms of steady state fluorescence spectra and steady-state Stern-Volmer anal. The Stern-Volmer constants for the dyes are compared to those obtained for some com. available dyes. The prospects for using these dyes in halide sensor devices are discussed.

Dyes and Pigments published new progress about Cationic dyes (fluorescent). 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, SDS of cas: 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Lin-Ping published the artcileA Three-Step Process to Facilitate the Enantioselective Assembly of Cis-Fused Octahydrophenanthrenes with a Quaternary Stereocenter, Application of 2-Bromo-4-methoxybenzoic acid, the main research area is iodomethyl bromobenzene cyclohexene regioselective alkylation; bromophenylethyl cyclohexene preparation enantioselective hydrogenation oxidation; bromophenyl ethyl cyclohexane preparation intramol enolate arylation; octahydrophenanthrene preparation.

A three-step process for the enantioselective assembly of cis-fused octahydrophenanthrenes with a quaternary stereocenter was reported. This synthetic strategy relied on a regioselective γ-alkylation, a one-pot sequence of asym. hydrogenation and oxidation and an intramol. enolate arylation to facilitate the rapid and enantioselective construction of cis-fused octahydrophenanthrene scaffolds with an arylated all-carbon quaternary stereocenter concisely and efficiently.

Organic Letters published new progress about Alkylation, regioselective. 74317-85-4 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxybenzoic acid, and the molecular formula is C8H7BrO3, Application of 2-Bromo-4-methoxybenzoic acid.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Denny, William A. published the artcilePotential antitumor agents. 59. Structure-activity relationships for 2-phenylbenzimidazole-4-carboxamides, a new class of minimal DNA-intercalating agents which may not act via topoisomerase II, Name: 6-Amino-3-bromo-2-methylbenzoic acid, the main research area is antitumor benzimidazolecarboxamide; antileukemic benzimidazolecarboxamide; neoplasm inhibitor benzimidazolecarboxamide; DNA minimal intercalating agent benzimidazolecarboxamide.

A series of ∼30 substituted 2-phenylbenzimidazole-4-carboxamides has been synthesized and evaluated for in vitro and in vivo antitumor activity. These compounds represent the logical conclusion to our search for “”minimal”” DNA-intercalating agents with the lowest possible DNA-binding constants Such “”2-1″” tricyclic chromophores, of lower aromaticity than the structurally-similar 2-phenylquinolines, have the lowest DNA binding affinity yet seen in the broad series of tricyclic carboxamide intercalating agents. Despite very low in vitro cytotoxicities, several of the compounds had moderate levels of in vivo antileukemic effects. However, the most interesting aspect of their biol. activity was the lack of cross-resistance shown to an amsacrine-resistant P388 cell line, suggesting that these compounds may not express their cytotoxicity via interaction with topoisomerase II. Thus, cyclization of RCHO (R = tolyl, anisyl, ClC6H4, etc.) with aminoanthranilic acid I gave benzimidazole II (R1 = OH) which was amidated with Me2N(CH2)2NH2 to give II [R1 = NH(CH2)2NMe2].

Journal of Medicinal Chemistry published new progress about Cyclocondensation reaction. 124341-06-6 belongs to class bromides-buliding-blocks, name is 6-Amino-3-bromo-2-methylbenzoic acid, and the molecular formula is C8H8BrNO2, Name: 6-Amino-3-bromo-2-methylbenzoic acid.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary