Tag: M.W:500-600

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent£¬ Application In Synthesis of Cerium(III) trifluoromethanesulfonate, Which mentioned a new discovery about 76089-77-5

Oxidation of organic compounds using a catalyzed cerium (IV) composition

A process for oxidizing aromatic and alkyl substituted aromatic compounds to quinonoid compounds by contacting an aromatic and alkyl aromatic compound with an acidic, aqueous solution of ceric oxidant in the presence of a catalytic amount of chromium cations. The present process provides a means of forming the desired quinonoid product in good yields and high selectivity.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

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Synthesis and evaluation of a68Ga-labeled bradykinin B1 receptor agonist for imaging with positron emission tomography

A novel68Ga-labeled bradykinin B1 receptor (B1R) agonist,68Ga-Z01115, was synthesized and evaluated for imaging with positron emission tomography (PET). Z01115 exhibited good binding affinity (Ki= 25.4 ¡À 5.1 nM) to hB1R.68Ga-Z01115 was prepared in 74 ¡À 5 decay-corrected radiochemical yield with >99% radiochemical purity and 155 ¡À 89 GBq/mumol (4.2 ¡À 2.4 Ci/mumol) specific activity.68Ga-Z01115 was stable in vitro in mouse plasma (93% remaining intact after 60 min incubation), and relatively stable in vivo (51 ¡À 5% remaining intact at 5 min post-injection). PET imaging and biodistribution studies in mice showed that68Ga-Z01115 cleared rapidly from nontarget tissues/organs, and generated high target-to-nontarget contrast images. The uptake of68Ga-Z01115 in B1R-positive (B1R+) tumor was 5.65 ¡À 0.59%ID/g at 1 h post-injection. Average contrast ratios of B1R+ tumor-to-B1R? tumor, -to-blood and -to-muscle were 24.3, 24.4 and 82.9, respectively. Uptake of68Ga-Z01115 in B1R+ tumors was reduced by ?90% with co-injection of cold standard, confirming it was mediated by B1R. Our data suggest that68Ga-Z01115 is a promising tracer for imaging the expression of B1R that is overexpressed in a variety of cancers.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Synthetic Route of 52093-25-1, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.52093-25-1, Name is Europium(III) trifluoromethanesulfonate, molecular formula is C3EuF9O9S3. In a article£¬once mentioned of 52093-25-1

Direct Construction of the Chroman Structure from 1,3-Diene. Regioselective Protonation of Acyclic Polyene

The regioselective protonation of acyclic polyene was achieved, dependent on the choice of catalyst.The addition of myrcene to trimethylhydroquinone, using boron trifluoride-diethyl ether (1/1), predominantly gave a spiro structure.When (+)-10-camphorsulfonic acid was used as a catalyst, the major compound produced was chroman.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Electric Literature of 52093-25-1, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 52093-25-1, Name is Europium(III) trifluoromethanesulfonate, molecular formula is C3EuF9O9S3. In a Article£¬once mentioned of 52093-25-1

Dramatic enhancement of catalytic activity in an ionic liquid: Highly practical Friedel-Crafts alkenylation of arenes with alkynes catalyzed by metal triflates

A simple and highly efficient method for the Friedel-Crafts alkenylation of aromatic compounds has been developed by using a metal triflate (OTf) catalyst in an ionic liquid (see scheme, bmim = 1-butyl-3-methylimidazolium). Not only is the catalytic activity significantly enhanced in the ionic liquid and by-product formation decreased, but some reactions that were not possible in conventional organic solvents were shown to proceed smoothly.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Related Products of 52093-25-1, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.52093-25-1, Name is Europium(III) trifluoromethanesulfonate, molecular formula is C3EuF9O9S3. In a article£¬once mentioned of 52093-25-1

2-Aza-1,3-butadiene derivatives featuring an anthracene or pyrene unit: Highly selective colorimetric and fluorescent signaling of Cu2+ cation

A new probe based on an anthryl derivative bearing an azadiene side chain selectively senses Cu2+ in acetonitrile through two different channels: the yellow-to-orange color change and a remarkable enhancement of the fluorescence, whereas the pyrenyl analogous behaves as a fluorescent sensor for Cu2+ and Hg2+ in aqueous environment.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 52093-25-1, molcular formula is C3EuF9O9S3, introducing its new discovery. Product Details of 52093-25-1

Supramolecular self-assembly of mixed f-d metal ion conjugates

The synthesis of the novel Eu(III) cyclen complex, Eu1, is described. In buffered pH 7.4 water, the Eu(III) emission was “switched on” upon excitation of the Terpy antenna. In the presence of various transition-metal ions (e.g., Fe(II) and Ni(II)), both the singlet-excited state and the Eu(III) emission were quenched (“switched off”), whereas in the ground state, an MLCT band was formed, signifying the formation of stable mixed linear trimetallic f-d supramolecular self-assemblies.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 52093-25-1, molcular formula is C3EuF9O9S3, introducing its new discovery. Product Details of 52093-25-1

Hydrophilic 2,9-bis-triazolyl-1,10-phenanthroline ligands enable selective Am(III) separation: A step further towards sustainable nuclear energy

The first hydrophilic, 1,10-phenanthroline derived ligands consisting of only C, H, O and N atoms for the selective extraction of Am(iii) from spent nuclear fuel are reported herein. One of these 2,9-bis-triazolyl-1,10-phenanthroline (BTrzPhen) ligands combined with a non-selective extracting agent, was found to exhibit process-suitable selectivity for Am(iii) over Eu(iii) and Cm(iii), providing a clear step forward.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Synthetic Route of 137076-54-1, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.137076-54-1, Name is 2-(4,7,10-Tris(2-(tert-butoxy)-2-oxoethyl)-1,4,7,10-tetraazacyclododecan-1-yl)acetic acid, molecular formula is C28H52N4O8. In a article£¬once mentioned of 137076-54-1

Active-Site Targeting Paramagnetic Probe for Matrix Metalloproteinases

The design and synthesis of the Ln3+ complexes of a DOTA-containing (DOTA=1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) inhibitor of matrix metalloproteinases are reported. The tight binding of the sulfonamide scaffold to the catalytic domain of the investigated matrix metalloproteinase is not impaired by the presence of the Ln3+-DOTA moiety. The paramagnetic properties of the Ln3+ complex are exploited to obtain insights into the structural features of the ligand?protein interactions and to evaluate the influence of the linker length on the quality of the paramagnetic restraints.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Electric Literature of 52093-25-1, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 52093-25-1, Name is Europium(III) trifluoromethanesulfonate, molecular formula is C3EuF9O9S3. In a Article£¬once mentioned of 52093-25-1

A simple thermodynamic model for rationalizing the formation of self-assembled multimetallic edifices: Application to triple-stranded helicates

Reaction of the bis-tridentate ligand bis{1-ethyl-2-[6?-(N,N- diethylcarbamoyl)pyridin-2?-yl]benzimidazol-5-yl}methane (L2) with Ln(CF3SO3)3¡¤xH2O in acetonitrile (Ln = La-Lu) demonstrates the successive formation of three stable complexes [Ln(L2)3]3+, [Ln2(L2) 3]6+, and [Ln2(L2)2]6+. Crystal-field independent NMR methods establish that the crystal structure of [Tb2(L2)3]6+ is a satisfying model for the helical structure observed in solution. This allows the qualitative and quantitative (beta23bi,Ln1Ln2) characterization of the heterobimetallic helicates [(Ln1)(Ln2)(L2) 3]6+. A simple free energy thermodynamic model based on (i) an absolute affinity for each nine-coordinate lanthanide occupying a terminal N6O3 site and (ii) a single intermetallic interaction between two adjacent metal ions in the complexes (DeltaE) successfully models the experimental macroscopic constants and allows the rational molecular programming of the extended trimetallic homologues [Ln 3(L5)3]9+.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is traditionally divided into organic and inorganic chemistry. name: (S)-Bis(3,5-bis(trifluoromethyl)phenyl)(pyrrolidin-2-yl)methanol. The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 848821-76-1

Arctic ground squirrel resist peroxynitrite-mediated cell death in response to oxygen glucose deprivation

Cerebral ischemia-reperfusion (I/R) injury initiates a cascade of events, generating nitric oxide (NO) and superoxide(O2?-) to form peroxynitrite (ONOO-), a potent oxidant. Arctic ground squirrels (AGS; Urocitellus parryii) show high tolerance to I/R injury. However, the underlying mechanism remains elusive. We hypothesize that tolerance to I/R modeled in an acute hippocampal slice preparation in AGS is modulated by reduced oxidative and nitrative stress. Hippocampal slices (400 mum) from rat and AGS were subjected to oxygen glucose deprivation (OGD) using a novel microperfusion technique. Slices were exposed to NO, O2- donors with and without OGD; pretreatment with inhibitors of NO, O2- and ONOO- followed by OGD. Perfusates collected every 15 min were analyzed for LDH release, a marker of cell death. 3-nitrotyrosine (3NT) and 4-hydroxynonenal (4HNE) were measured to assess oxidative and nitrative stress. Results show that NO/O2- alone is not sufficient to cause ischemic-like cell death, but with OGD enhances cell death more in rat than in AGS. A NOS inhibitor, SOD mimetic and ONOO- inhibitor attenuates OGD injury in rat but has no effect in AGS. Rats also show a higher level of 3NT and 4HNE with OGD than AGS suggesting the greater level of injury in rat is via formation of ONOO-.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI