Month: November 2022

Zukerman-Schpector, Julio published the artcileCrystal structure of 1,2-bis(4-fluoro-2-methylphenyl)ditelluride, [Te(C7H6F)]2, COA of Formula: C7H6BrF, the main research area is crystal structure fluoromethylphenyl telluride; mol structure fluoromethylphenyl telluride; pi interaction fluoromethylphenylditelluride.

Crystallog. data and at. coordinates are given. The title mol. has twofold symmetry and d(Te-Tei) = 2.691(1) Å (symmetry code i: 2-x,y,1/2-z). The angle subtended at the Te(II) center is 99.2(2)° and indicates a bent geometry consistent with two stereochem. active lone pairs. The crystal packing is dominated by: (a) C-H…F bonds along [100], the shortest contact being 2.68 Å which occurs between C5-H and Fii (symmetry code ii: 3/2-x, 1/2+y, 1/2-z); (b) Te…Teii interactions along [010] (d(Te…Teiii) = 3.73 Å; symmetry code iii: 2-x,-1-y,-z); and (c) π-π interactions between successive C1-C6 rings that form columns along [001] (d(Cg… Cgiv) = 3.780(4) Å, g = 1-6; symmetry code iv: x, -y, -1/2+z).

Zeitschrift fuer Kristallographie – New Crystal Structures published new progress about Crystal structure. 452-63-1 belongs to class bromides-buliding-blocks, name is 1-Bromo-4-fluoro-2-methylbenzene, and the molecular formula is C7H6BrF, COA of Formula: C7H6BrF.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Jung, Christian M. published the artcileSyntheses and first crystal structures of rhenium complexes derived from ω-functionalized fatty acids as model compounds of technetium tracers for myocardial metabolism imaging, Computed Properties of 56523-59-2, the main research area is rhenium fatty acid thiolate Schiff oxo carbonyl preparation structure; crystal structure rhenium fatty acid thiolate Schiff oxo carbonyl; technetium radiopharmaceutical tracer myocardial metabolism imaging model preparation structure.

In an attempt to develop new technetium-based radiopharmaceuticals for the noninvasive diagnosis of myocardial metabolism, the authors synthesized three examples of novel metal-containing fatty acid derivatives according to the “”3+1″” mixed-ligand and the Schiff base/tricarbonyl design, Re:O[S(CH2)2S(CH2)2S][S(CH2)11S(CH2)4CO2H] (7), Re:O[S(CH2)2NMe(CH2)2S][S(CH2)14CO2H] (10) and ReBr(CO)3[2-py-CH:N(CH2)11CO2H] (14). The chelates contain the metal core in the oxidation states +5 (7 and 10) and +1 (14) and are attached to the end-position of a fatty acid chain. The complex formation was accomplished by ligand-exchange reactions with three different rhenium precursors, whereas the inactive rhenium metal was used as a surrogate of the technetium radionuclide. The mol. structures of the fatty acid complexes 7, 10 and 14 were determined by single-crystal x-ray diffraction analyses and impressively show a general problem in technetium tracer research, the significant structural alterations of bioactive mols. by coordination even to small metal chelates.

European Journal of Inorganic Chemistry published new progress about Crystal structure. 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Computed Properties of 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Braeu, Elmar published the artcileOn heterocyclic systems containing bismuth(III). 2. Eight-membered heterocycles Cl/Br/I-M(CH2CH2CH2)2X with Lewis acidic group 15 atoms M = As, Sb, Bi and donor atoms X = NR, S: a contribution to the value of the electronegativity of bismuth(III), Computed Properties of 58929-72-9, the main research area is Pauling electronegativity Group VA element; Group VA element heterocycle transannular interaction; crystal structure antimony nitrogen heterocycle; mol structure antimony nitrogen heterocycle; metallocane.

Paths to the ligands (XCH2CH2CH2)2Z [X = Cl, Br; Z = NR (R = Me, PhCH2, CHMe2, iso-Bu), O, S, Se], to the diGrignard reagents (XMgCH2CH2CH2)2Z (same X, Z), and to the eight-membered Group 15 heterocycles XM(CH2CH2CH2)2Z [I; X = Cl, Br, iodo; M = As, Sb, Bi; Z = NR (R = Me PhCH2, iso-Bu), S] are given. 13C-NMR, IR and Raman spectra are discussed; for the compound ClSb(CH2CH2CH2)2NMe the crystal structure anal. is given: the antimony atom is clearly Lewis acidic with ψ-trigonal-bipyramidal coordination and a transannular Sb…N interaction of 2.385(2)Å. For such a configuration the values of the 13C-NMR chem. shifts of the α-CH2-groups (e.g. ClM(αCH2CH2CH2)2NMe (M = As, Sb, Bi) 34.6, 25.9, 46.6 ppm) display clearly a sequence N > Bi > P ≈ As > Sb for the Pauling electronegativities of the group 15 elements: a value as high as 2.3 for bismuth is suggested.

Polyhedron published new progress about Crystal structure. 58929-72-9 belongs to class bromides-buliding-blocks, name is 1-Bromo-3-(3-bromopropoxy)propane, and the molecular formula is C6H12Br2O, Computed Properties of 58929-72-9.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sindt, Ammon J. published the artcileGuest Inclusion Modulates Concentration and Persistence of Photogenerated Radicals in Assembled Triphenylamine Macrocycles, Category: bromides-buliding-blocks, the main research area is macrocycle self assembly crystal guest radicals.

Substituted triphenylamine (TPA) radical cations show great potential as oxidants and as spin-containing units in polymer magnets. Their properties can be further tuned by supramol. assembly. Here, we examine how the properties of photogenerated radical cations, intrinsic to TPA macrocycles, are altered upon their self-assembly into one-dimensional columns. These macrocycles consist of two TPAs and two methylene ureas, which drive the assembly into porous organic materials. Advantageously, upon activation the crystals can undergo guest exchange in a single-crystal-to-single-crystal transformation generating a series of isoskeletal host-guest complexes whose properties can be directly compared. Photoinduced electron transfer, initiated using 365 nm light-emitting diodes, affords radicals at room temperature as observed by ESR (EPR) spectroscopy. The line shape of the EPR spectra and the quantity of radicals can be modulated by both polarity and heavy atom inclusion of the encapsulated guest. These photogenerated radicals are persistent, with half-lives between 1 and 7 d and display no degradation upon radical decay. Re-irradiation of the samples can restore the radical concentration back to a similar maximum concentration, a feature that is reproducible over several cycles. EPR simulations of a representative spectrum indicate two species, one containing two N hyperfine interactions and an addnl. broad signal with no resolvable hyperfine interaction. Intriguingly, TPA analogs without bromine substitution also exhibit similar quantities of photogenerated radicals, suggesting that supramol. strategies can enable more flexibility in stable TPA radical structures. These studies will help guide the development of new photoactive materials.

Journal of the American Chemical Society published new progress about Crystal structure. 183994-94-7 belongs to class bromides-buliding-blocks, name is 4-(Bromomethyl)-N,N-diphenylaniline, and the molecular formula is C19H16BrN, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Choi, P. published the artcileReaction of 3-azido-5-phenyl-1,2,4-oxadiazole with dimethylformamide, a new deoxygenative coupling reaction, HPLC of Formula: 23432-94-2, the main research area is azidophenyloxadiazole deoxygenative coupling DMF; oxadiazole azido deoxygenative coupling; methylaminooxadiazole; aminomethyleneaminooxadiazole.

Heating the bromooxadiazole I (R = Br) with NaN3 in anhydrous DMF at 130° for 3 h gave the oxadiazoles I (R = NMe2, N:CHNMe2) in 39 and 34% yield, resp. The latter is formed by a new deoxygenative coupling of the azide I (R = N3) (the product of the reaction at 90°), or the nitrene derived from it, with DMF.

Tetrahedron Letters published new progress about Coupling reaction. 23432-94-2 belongs to class bromides-buliding-blocks, name is 3-Bromo-5-phenyl-1,2,4-oxadiazole, and the molecular formula is C8H5BrN2O, HPLC of Formula: 23432-94-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Figueiredo, Tamiris published the artcileSelf-crosslinking smart hydrogels through direct complexation between benzoxaborole derivatives and diols from hyaluronic acid, Formula: C8H6BrFO2, the main research area is hydrogel benzoxaborole derivative diol hyaluronic acid direct complexation.

Boronate ester cross-linked hydrogels have emerged as promising injectable scaffolds for biomedical applications given their rapid self-healing ability. For a rational design of such networks, all variables influencing their dynamic rheol. properties, especially the boronic acid and the diol-containing mol. selected as mol. crosslinkers have to be carefully considered. Herein, by tailoring the structure of benzoxaborole (BOR), self-crosslinking hydrogels based on hyaluronic acid (HA) modified with BOR derivatives are obtained for the first time through the direct BOR-HA diol complexation at physiol. pH. Among the different HA-BOR conjugates investigated, those prepared from 6-amino-7-fluoro-3,3-dimethyl benzoxaborole (HA-DMF6ABOR) and 7-amino-3,3-dimethyl benzoxaborole (HA-DM7ABOR) show unprecedented self-crosslinking properties, leading to the formation of self-healing hydrogels with extremely slow dynamics. These networks also exhibit remarkable pH- and glucose-responsive behaviors. These properties are related to the peculiar structure of these two BOR moieties, having as the common feature, a gem-di-Me group in the oxaborole ring and an ortho-substituent in the Ph ring. Mol. dynamic simulations are used to provide insight in the role of these substituents in the outstanding capability of DMF6ABOR and DM7ABOR to crosslink HA. They show that BOR complexation induces changes in conformation of HA favoring formation of a highly entangled 3D network.

Polymer Chemistry published new progress about Aqueous solutions. 647020-71-1 belongs to class bromides-buliding-blocks, name is Methyl 2-bromo-3-fluorobenzoate, and the molecular formula is C8H6BrFO2, Formula: C8H6BrFO2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Di Fabio, Romano published the artcileDiscovery Process and Pharmacological Characterization of 2-(S)-(4-Fluoro-2-methylphenyl)piperazine-1-carboxylic Acid [1-(R)-(3,5-Bis-trifluoromethylphenyl)ethyl]methylamide (Vestipitant) as a Potent, Selective, and Orally Active NK1 Receptor Antagonist, Application of 1-Bromo-4-fluoro-2-methylbenzene, the main research area is piperazine urea aryl asym preparation neurokinin receptor antagonist activity; Vestipitant piperazine NK receptor antagonist pharmacokinetic structure activity relationship.

In an effort to discover novel drug-like NK1 receptor antagonists a new series of suitably substituted C-phenylpiperazine derivatives was identified by an appropriate chem. exploration of related N-phenylpiperazine analogs, with the specific aim to maximize their in vitro affinity and optimize in parallel their pharmacokinetic profile. Among the compounds synthesized, I (Vestipitant) was identified as one of the most in vitro potent and selective NK1 receptor antagonists ever discovered, showing appropriate pharmacokinetic properties and in vivo activity. On the basis of its preclin. profile, I was selected as a drug candidate.

Journal of Medicinal Chemistry published new progress about Anxiety disorders. 452-63-1 belongs to class bromides-buliding-blocks, name is 1-Bromo-4-fluoro-2-methylbenzene, and the molecular formula is C7H6BrF, Application of 1-Bromo-4-fluoro-2-methylbenzene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Heal, William P. published the artcileBioorthogonal chemical tagging of protein cholesterylation in living cells, Name: 15-Bromopentadecanoic acid, the main research area is bioorthogonal tagging protein cholesterylation living cell.

The authors report the first chem. probe for bioorthogonal chem. tagging of post-translationally cholesterylated proteins with an azide in living cells. This enables rapid multiplexed fluorescence detection and affinity labeling of protein cholesterylation, as exemplified by Sonic hedgehog protein, opening up new approaches for the de novo identification of cholesterylated proteins.

Chemical Communications (Cambridge, United Kingdom) published new progress about Affinity labeling. 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Name: 15-Bromopentadecanoic acid.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kolluru, Srinivas published the artcileNickel-Catalyzed Annulations of ortho-Haloarylimines, Safety of Ethyl 2-bromo-4-fluorobenzoate, the main research area is nickel catalyzed annulation ortho haloarylimine anti selectivity; amines; catalysis; chemometrics; kinetics; mechanism; nickel; reaction parametrization; spectroscopy; spirocycles.

We report the discovery, development, and mechanism of a nickel-catalyzed annulation reaction between o-haloarylimines and electron-poor olefins. The reaction produces two adjacent anti stereocenters and a free secondary amine. Spirocycles are formed from cyclic imines. We characterized the key oxidative addition intermediate and identified a major path leading to competing homocoupling products. The activation energy of oxidative addition and the rate of oxidative addition complex isomerization were determined The sensitivity of the reaction to reaction conditions was established in a quant. manner and both the scope and limitations of the method are presented.

ACS Catalysis published new progress about Activation energy. 651341-68-3 belongs to class bromides-buliding-blocks, name is Ethyl 2-bromo-4-fluorobenzoate, and the molecular formula is C9H8BrFO2, Safety of Ethyl 2-bromo-4-fluorobenzoate.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Scholz, Johannes published the artcileSynthesis of diisocyanides with phenolic groups and their polymerization to helically chiral poly(quinoxaline-2,3-diyl)s, Application In Synthesis of 10172-35-7, the main research area is helically chiral polyquinoxaline diyl stability organocatalyst.

The development of synthetic routes which lead to five new diisocyanide monomers with one or two phenolic groups is described. Their polymerization behavior is studied with Pd- and Ni-based initiators, as well as under microwave irradiation The polymerizability is mainly dominated by steric effects as is concluded from experiments using different protecting groups. Chiroptical properties of these new polymers are studied by CD-spectroscopy. After deprotection, helically chiral poly(quinoxalin-2,3-diyl)s are obtained which display a Bronsted function attached to a stereolabile biaryl axis whose configuration should be influenced by the chiral polymer backbone. © 2015 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2015.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about Circular dichroism. 10172-35-7 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxy-6-nitroaniline, and the molecular formula is C7H7BrN2O3, Application In Synthesis of 10172-35-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary