Category: bromides-buliding-blocks

Fujii, Akira published the artcileProbiotics. Antistaphylococcal and antifibrinolytic activities of ω-amino- and ω-guanidinoalkanesulfonic acids, HPLC of Formula: 55788-44-8, the publication is Journal of Medicinal Chemistry (1975), 18(5), 502-5, database is CAplus and MEDLINE.

A series of 5 H2N(CH2)nSO3H (I, n = 1-5) was prepared by reacting the dibromoalkane with Na2SO3 followed by NH4OH, while the guanidino analogs (II, n = 2-5) were prepared from the corresponding I by reaction with S-ethylisothiourea sulfate [22722-03-8]. All 9 compounds significantly protected mice against Staphylococcus aureus, but did not inhibit growth of S. aureus in vitro, while most of I had antifibrinolytic activity. δ-Aminobutanesulfonic acid (I, n = 4) [14064-34-7] had significantly greater antistaphylococcal activity than γ-aminobutyryl-L-histidine [3650-73-5], and had antifibrinolytic activity equal to ε-aminohexanoic acid [60-32-2]. None of II had antifibrinolytic activity. Structure-activity relations are discussed.

Journal of Medicinal Chemistry published new progress about 55788-44-8. 55788-44-8 belongs to bromides-buliding-blocks, auxiliary class Bromide,Salt,Aliphatic hydrocarbon chain,Aliphatic hydrocarbon chain, name is Sodium 3-bromopropane-1-sulfonate, and the molecular formula is C3H6BrNaO3S, HPLC of Formula: 55788-44-8.

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

Ashley, Andrew E. published the artcileHomoleptic Permethylpentalene Complexes: “Double Metallocenes” of the First-Row Transition Metals, Formula: C4H10Br2CoO2, the publication is Journal of the American Chemical Society (2008), 130(46), 15662-15677, database is CAplus and MEDLINE.

The synthesis of the bimetallic permethylpentalene complexes Pn^*₂M₂ (M = V, Cr, Mn, Co, Ni; Pn^* = C₈Me₆) was accomplished, and all of the complexes were structurally characterized in the solid state by single-crystal x-ray diffraction. Pn^*₂V₂ (1) and Pn^*₂Mn₂ (3) show very short intermetallic distances that are consistent with metal-metal bonding, while the Co centers in Pn^*₂Co₂ (4) exhibit differential bonding to each side of the Pn^* ligand that is consistent with an η⁵:η³ formulation. The Pn^* ligands in Pn^*₂Ni₂ (5) are best described as η³:η³-bonded to the metal centers. ¹H NMR studies indicate that all of the Pn^*₂M₂ species exhibit D_2h mol. symmetry in the solution phase; the temperature variation of the chem. shifts for the resonances of Pn^*₂Cr₂ (2) indicates that the mol. has an S = 0 ground state and a thermally populated S = 1 excited state and can be successfully modeled using a Boltzmann distribution (ΔH° = 14.9 kJ mol^-1 and ΔS° = 26.5 J K^-1 mol^-1). The solid-state molar magnetic susceptibility of 3 obeys the Curie-Weiss law with μ_eff = 2.78 μB and θ = -1.0 K; the complex is best described as having an S = 1 electronic ground state over the temperature range 4-300 K. Paradoxically, attempts to isolate the double ferrocene equivalent, Pn^*₂Fe₂, led only to the isolation of the permethylpentalene dimer Pn^*₂ (6). Solution electrochem. studies were performed on all of the organometallic compounds; 2-5 exhibit multiple quasi-reversible redox processes. D. functional theory calculations were performed on this series of complexes to rationalize the observed structural and spectroscopic data and provide estimates of the M-M bond order.

Journal of the American Chemical Society published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, Formula: C4H10Br2CoO2.

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

Steward, Kimberly M. published the artcileAsymmetric Synthesis of Diverse Glycolic Acid Scaffolds via Dynamic Kinetic Resolution of α-Keto Esters, Synthetic Route of 69361-41-7, the publication is Journal of the American Chemical Society (2012), 134(49), 20197-20206, database is CAplus and MEDLINE.

The dynamic kinetic resolution of α-keto esters via asym. transfer hydrogenation has been developed as a technique for the highly stereoselective construction of structurally diverse β-substituted-α-hydroxy carboxylic acid derivatives Through the development of a privileged m-terphenylsulfonamide for (arene)RuCl(monosulfonamide) complexes with a high affinity for selective α-keto ester reduction, excellent levels of chemo-, diastereo-, and enantiocontrol can be realized in the reduction of β-aryl- and β-chloro-α-keto esters.

Journal of the American Chemical Society published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C6H8O6, Synthetic Route of 69361-41-7.

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

Steward, Kimberly M. published the artcileAsymmetric Synthesis of Diverse Glycolic Acid Scaffolds via Dynamic Kinetic Resolution of α-Keto Esters [Erratum to document cited in CA158:36961], Recommanded Product: (4-Bromobut-1-yn-1-yl)trimethylsilane, the publication is Journal of the American Chemical Society (2015), 137(11), 3991, database is CAplus and MEDLINE.

In follow up experiments the authors discovered errors in analyzing the unpurified ¹H NMR spectra, which led to incorrect reporting of the crude diastereomer ratios for the lactone products; the correct ratios are given and an alternative exptl. procedure is presented that generally results in improved stereoselectivity.

Journal of the American Chemical Society published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C16H20N2, Recommanded Product: (4-Bromobut-1-yn-1-yl)trimethylsilane.

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

Sartini, Stefania published the artcileBenzofuroxane Derivatives as Multi-Effective Agents for the Treatment of Cardiovascular Diabetic Complications. Synthesis, Functional Evaluation, and Molecular Modeling Studies, Synthetic Route of 76283-09-5, the publication is Journal of Medicinal Chemistry (2012), 55(23), 10523-10531, database is CAplus and MEDLINE.

Diabetes mellitus is the major risk factor for cardiovascular disorders. Aldose reductase, the rate-limiting enzyme of the polyol pathway, plays a key role in the pathogenesis of diabetic complications. Accordingly, inhibition of this enzyme is emerging as a major therapeutic strategy for the treatment of hyperglycemia-induced cardiovascular pathologies. In this study, the authors describe a series of 5(6)-substituted benzofuroxane derivatives, synthesized as aldose reductase inhibitors. Besides inhibiting efficiently the target enzyme, these benzofuroxane derivatives showed addnl. NO donor and antioxidant properties, thus emerging as novel multi-effective compounds The benzyloxy derivative (I), the most promising of the whole series, showed a well-balanced, multifunctional profile consisting of submicromolar ALR2 inhibitory efficacy (IC₅₀ = 0.99±0.02 μM), significant and spontaneous NO generation properties, and excellent hydroxyl radical scavenging activity. Computational studies of the novel compounds clarified the aldose reductase inhibitory profile observed, thus rationalizing structure-activity relationships of the whole series.

Journal of Medicinal Chemistry published new progress about 76283-09-5. 76283-09-5 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzyl bromide,Benzene, name is 4-Bromo-1-(bromomethyl)-2-fluorobenzene, and the molecular formula is C7H5Br2F, Synthetic Route of 76283-09-5.

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

Ghirardello, Mattia published the artcileSynthesis of Chiral Ionic Liquids from Natural Monosaccharides, Safety of 1-Bromooctane, the publication is European Journal of Organic Chemistry (2022), 2022(21), e202200100, database is CAplus.

Three series of new ionic liquids (ILs), namely imidazolium-, pyrazolium-, and bis-benzimidazolium-containing ILs, were prepared from low-cost, unprotected carbohydrates. Information on anion-cation interactions and solvation shell were obtained via diffusion NMR and heteronuclear Overhauser correlation maps (HOESY), resp.

European Journal of Organic Chemistry 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 C8H17Br, Safety of 1-Bromooctane.

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

Chretien, Jacques R. published the artcileSolvation and steric effects on electrophilic reactivity of ethylenic compounds. 3. Stereo-, regio-, and chemoselectivity of alkene bromination in methanol, Formula: C6H12Br2, the publication is Journal of Organic Chemistry (1993), 58(7), 1917-21, database is CAplus.

The stereo-, regio- and chemoselectivities of the bromination of 30 alkenes bearing 1-3 alkyl groups (Me, Et, Pr, iso-Pr, tert-Bu, neopentyl) were investigated in methanol containing 0.2 M NaBr at 25° under kinetic conditions. The reaction of cis– and trans-alkenes, RC_αH:C_βHR’, with R more electron-donating than R’, is stereospecific, in agreement with the occurrence of a bromonium ion intermediate. Methanol and bromide ion trap the bridged ion anti with respect to the bridging bromine atom, independently of the crowding of the double bond. In contrast to the usual belief, the anti-Markovnikov regioselectivity of attack by methanol is always favored, even in the absence of bulky substituents; the better a donor R is, the more the nucleophile attacks C_β. The chemoselectivity dependence on the double-bond substituents is also unexpected; dibromide formation increases with respect to that of methoxy bromide as electron-donation by R and R’ increases, although the increasing carbocationic character of the carbon atoms of the bridged ion should favor trapping of the intermediate by methanol. Analogous trends for the regio- and chemoselectivity dependence on the substituents are observed in the bromination of monosubstituted alkenes, RCH:CH₂, via bromonium ions. These results are attributed to a decrease in the pos. charge densities on the carbon atoms of the bridged ions when the ability of the donor substituents to delocalize charge increases. gem-Disubstituted alkenes, RR’C:CH₂, and trimethylethylene behave differently as regards the regio- and chemoselectivity. They react 100% Markovnikov and chemoselectively (about 80%) in favor of attack by methanol. It is shown that these selectivities agree fairly well with highly dissym. bromonium ions as intermediates in the bromination of these alkenes.

Journal of Organic Chemistry published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, Formula: C6H12Br2.

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

Booker-Milburn, Kevin I. published the artcileFe(III)/Cu(II) mediated 5- and 6-exo oxidative ring-expansion/cyclisation of cyclopropyl ethers: studies towards dictyol C and α-eudesmol, COA of Formula: C7H13BrSi, the publication is Tetrahedron Letters (2000), 41(23), 4651-4655, database is CAplus.

The outcome of oxidative ring-expansion/cyclization of cyclopropanes with a mixed Fe(III)/Cu(II) system was found to be dependent on the mode of cyclization. When 6-exo cyclization was attempted, unusual products resulting from oxidation of ring-opened primary radicals were obtained.

Tetrahedron Letters published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, COA of Formula: C7H13BrSi.

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

Mathew, Sanyo published the artcileEnhanced Helical Folding of ortho-Phenylenes through the Control of Aromatic Stacking Interactions, Recommanded Product: 2-Bromo-5-methoxybenzene boronic acid, the publication is Journal of the American Chemical Society (2014), 136(47), 16666-16675, database is CAplus and MEDLINE.

The ortho-phenylenes are a simple class of foldamers, with the formation of helixes driven by offset aromatic stacking interactions parallel to the helical axis. For the majority of reported o-phenylene oligomers, the perfectly folded conformer comprises perhaps 50-75% of the total population. Given the hundreds or thousands of possible conformers for even short oligomers, this distribution represents a substantial bias toward the folded state. However, “next-generation” o-phenylenes with better folding properties are needed if these structures are to be exploited as functional units within more complex architectures. Here, we report several new series of o-phenylene oligomers, varying both the nature and orientation of the substituents on every repeat unit. The conformational behavior was probed using a combination of NMR spectroscopy, DFT calculations, and X-ray crystallog. We find that increasing the electron-withdrawing character of the substituents gives oligomers with substantially improved folding properties. With moderately electron-withdrawing groups (acetoxy), we observe >90% of the perfectly folded conformer, and stronger electron withdrawing groups (triflate, cyano) give oligomers for which misfolded states are undetectable by NMR. The folding of these oligomers is only weakly solvent-dependent. General guidelines for the assessment of o-phenylene folding by NMR and UV-vis spectroscopy are also discussed.

Journal of the American Chemical Society published new progress about 89694-44-0. 89694-44-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic acid and ester, name is 2-Bromo-5-methoxybenzene boronic acid, and the molecular formula is C7H8BBrO3, Recommanded Product: 2-Bromo-5-methoxybenzene boronic acid.

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

Bricaud, Quentin published the artcileTerthiophene-cyanovinylene π-conjugated polymers as donor material for organic solar cells, HPLC of Formula: 303734-52-3, the publication is Synthetic Metals (2009), 159(23-24), 2534-2538, database is CAplus.

Conjugated polymers of hybrid structure containing cyanovinylene linkages have been synthesized by Knoevenagel condensation of diformyl terthienyls with para-dicyanomethylbenzene. UV-vis and cyclic voltammetric data show that these polymers combine reduced band gap, improved light-harvesting properties and low lying HOMO level. Whereas the very low solubility of the polymers did not allow the fabrication of bulk heterojunction solar cells, bilayer heterojunction solar cells have been realized using thermally evaporated films of fullerene C₆₀ as acceptor material. The best devices show a maximum external quantum efficiency of ∼20% and a power conversion efficiency of 0.40% under simulated AM 1.5 solar illumination.

Synthetic Metals published new progress about 303734-52-3. 303734-52-3 belongs to bromides-buliding-blocks, auxiliary class Thiophene,Bromide, name is 2-Bromo-3-(2-ethylhexyl)thiophene, and the molecular formula is C12H19BrS, HPLC of Formula: 303734-52-3.

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