Category: bromides-buliding-blocks

Yuan, Bing published the artcileNickel-Catalyzed Regioselective Reductive Ring Opening of Aryl Cyclopropyl Ketones with Alkyl Bromides, HPLC of Formula: 111-83-1, the publication is ACS Catalysis (2022), 12(8), 4261-4267, database is CAplus.

Herein, the successful implementation of reductive strategy in the ring opening reaction of aryl cyclopropyl ketones with unactivated alkyl bromides was reported for the synthesis of ketones. Under the catalysis of nickel, this reductive Csp³-Csp³ cross-coupling reaction proceeds with complete regioselectivity and bypasses the use of pregenerated organometallics, enabling efficient synthesis of alkylated ketones with high step economy and functionality tolerance.

ACS Catalysis published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C7H11N, HPLC of Formula: 111-83-1.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Yuan, Jia-cheng published the artcileSynthesis of 2-bromo-4-methoxyaniline in ionic liquid, Application In Synthesis of 111865-47-5, the publication is Huaxue Shijie (2011), 52(12), 747-750, database is CAplus.

A method for synthesis of 2-bromo-4-methoxyaniline in ionic liquid was introduced. The title compound was prepared from p-methoxyaniline through bromination. The 2-bromo-4-methoxyaniline was obtained in 98.2% yield and 99.5% purity. The effect of various brominating agents and their amounts, reaction temperature and reaction time on the bromination reaction was investigated. The new procedure for preparing 2-bromo-4-methoxyaniline has the advantages of easy source of material, good yield, simple operation and environmental benignity. Ionic liquid can be reused.

Huaxue Shijie published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C12H20O6, Application In Synthesis of 111865-47-5.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Regueiro-Figueroa, Martin published the artcileMolecular Recognition of Sialic Acid by Lanthanide(III) Complexes through Cooperative Two-Site Binding, SDS of cas: 166821-88-1, the publication is Inorganic Chemistry (2010), 49(9), 4212-4223, database is CAplus and MEDLINE.

Herein the authors report two new ligands, 1,4,7-tris(carboxymethyl)-10-[2-(dihydroxyboranyl)benzyl]-1,4,7,10-tetraazacyclododecane (L¹) and 1,4,7-tris(carboxymethyl)-10-[3-(dihydroxyboranyl)benzyl]-1,4,7,10-tetraazacyclododecane (L²), which contain a phenylboronic acid (PBA) function and a 1,4,7,10-tetraazacyclododecane-1,4,7-triacetate cage for complexation of lanthanide ions in an aqueous solution The pK_a of the PBA function amounts to 4.6 in [Gd(L¹)] and 8.9 in [Gd(L²)], with the value of the L² analog being very similar to that of PBA (8.8). These results are explained by the coordination of the PBA function of L¹ to the Gd^III ion, which results in a dramatic lowering of its pK_a. As a consequence, [Gd(L¹)] does not bind to saccharides at physiol. pH. The nuclear magnetic relaxation dispersion profiles recorded for [Gd(L¹)] and [Gd(L²)] confirm that the phenylboronate function is coordinated to the metal ion in the L¹ derivative, which results in a q = 0 complex. The interaction of the [Gd(L²)] complex with 5-acetylneuraminic acid (Neu5Ac) and 2-α-O-methyl-5-acetylneuraminic acid (MeNeu5Ac) was studied by spectrophotometric titrations in an aqueous solution (pH 7.4, 0.1M 3-(N-morpholino)propanesulfonic acid buffer). Also, the authors have also studied the binding of these receptors with competing monosaccharides such as D-(+)-glucose, D-fructose, D-mannose, D-galactose, Me α-D-galactoside, and Me α-D-mannoside. The binding constants obtained indicate an important selectivity of [Gd(L²)] for Neu5Ac (K_eq = 151) over D-(+)-glucose (K_eq = 12.3), D-mannose (K_eq = 21.9), and D-galactose (K_eq = 24.5). Also, a very weak binding affinity was observed in the case of Me α-D-galactoside and Me α-D-mannoside. An 8-fold increase of the binding constant of [Gd(L²)] with Neu5Ac is observed when compared to that of PBA determined under the same conditions (K_eq = 19). ¹³C NMR spectroscopy and d. functional theory calculations performed at the B3LYP/6-31G(d) level show that this is due to a cooperative two-site binding of Neu5Ac through (1) ester formation by interaction on the PBA function of the receptor and (2) coordination of the carboxylate group of Neu5Ac to the Gd^III ion. The emission lifetime of the ⁵D₄ level of Tb^III in [Tb(L²)] increases upon Neu5Ac binding, in line with the displacement of inner-sphere water mols. due to coordination of Neu5Ac to the metal ion.

Inorganic Chemistry published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C12H16BBrO2, SDS of cas: 166821-88-1.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Cheng, Haojin published the artcileIron(II) complexes containing thiophene-substituted “bispicen” ligands – Spin-crossover, ligand rearrangements, and ferromagnetic interactions, Quality Control of 52431-30-8, the publication is Canadian Journal of Chemistry (2010), 88(9), 954-963, database is CAplus.

The synthesis and characterization of three new tetradentate bispicen-type ligands containing a substituted thiophene heterocycle [I, R = H (7), Ph (8), or 2-thienyl (9)] are described. Iron(II) bis(thiocyanate) coordination complexes containing 7 – 9 were prepared, and the electronic and variable-temperature magnetic properties of complexes containing 7 (10) and 9 (12) are described. Complex 10 features a gradual and incomplete spin crossover in the solid state, and 12 remains high-spin over the entire temperature range. Complex 11 containing 8 is extremely unstable and rearranges to another iron(II) complex (13), which was structurally characterized. The temperature-dependent magnetic properties of 13 are described as a 1-dimensional ferromagnetic chain, with interchain antiferromagnetic interactions and (or) zero-field splitting dominant at low temperatures The magnetic anal. is corroborated by the mol. packing and d. functional theory calculations, which suggest intermol. interactions between coordinated thiocyanate ligands bearing a significant spin d.

Canadian Journal of Chemistry published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Quality Control of 52431-30-8.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Orthgiess, Erhard published the artcileColorimetric determination of anionic surfactants, Application of Dimidium bromide, the publication is Tenside, Surfactants, Detergents (1990), 27(4), 226-8, database is CAplus.

A method for the determination of anionic surfactants such as alkyl- and alkylarylsulfates, -sulfonates, and -sulfosuccinates in aqueous solutions is based on the absorbance measurement of surfactant-dye (i.e., 3,8-diamino-5-methyl-6-phenylphenanthridinium bromide) complexes at 525 nm. The technique is simpler and faster than other colorimetric methods and can be used for the anal. of 1 × 10^-4 to 5 × 10^-7 M solutions

Tenside, Surfactants, Detergents published new progress about 518-67-2. 518-67-2 belongs to bromides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is Dimidium bromide, and the molecular formula is C20H18BrN3, Application of Dimidium bromide.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary