Month: December 2022

Guan, Weijiang published the artcileDesign of a Temperature-Independent Luminescent Probe for Visualization of Ice-to-Liquid Transition at -129°C, Safety of 1-Bromooctane, the publication is Journal of Physical Chemistry C (2022), 126(17), 7556-7563, database is CAplus.

The temperature-dependent nature and intense emission in solution of fluorescence mols. prevent them from visualizing various processes accompanying temperature changes (e.g., the liquid-ice transition at ultralow temperatures). To overcome the intrinsic difficulty, we synthesized a custom-designed fluorescent probe to exhibit the temperature-independent negligible fluorescence in the solution state but emit bright light in the icing state. The ice-to-liquid transition of four hydrocarbons, whose f.ps. are between -27 and -129°C, can be sensitively visualized using the proposed temperature-independent fluorescent probe. More interestingly, we have built a homemade platform to enable the real-time imaging of the f.ps. of these four hydrocarbons within 3 min. For the first time, we designed a liquid-ice transition-sensitive probe at ultralow temperatures, different from the conventional temperature-dependent systems. This success will not only help to gain insights into the icing mechanisms but may also contribute to the development of portable visualization devices for monitoring phase transition.

Journal of Physical Chemistry C 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

Guo, Libing published the artcileSynthesis of N-(4-biphenyl)-(9,9-dimethyl-2-fluorenyl)amine, Category: bromides-buliding-blocks, the publication is Huaxue Tongbao (2010), 73(8), 750-752, database is CAplus.

2-Bromofluorene was prepared from fluorene and benzyltrimethylammonium tribromide in dichloromethane-methanol solution at room temperature, followed by a reaction with iodomethane in THF in the presence of potassium tert-butanolate and formation of 9,9-dimethyl-2-bromo-9H-fluorene. The synthesis of the target compound was achieved by a Buchwald-Hartwig reaction of the above-mentioned aryl bromide with [1,1′-biphenyl]-4-amine and the product thus obtained was confirmed by ¹H-NMR, ¹³C-NMR, MS, IR spectra and elemental anal.

Huaxue Tongbao 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 C10H16Br3N, Category: bromides-buliding-blocks.

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

Fan, Tian-Yun published the artcileStructure-activity relationship and biological evaluation of berberine derivatives as PCSK9 down-regulating agents, Application In Synthesis of 21101-63-3, the publication is Bioorganic Chemistry (2021), 104994, database is CAplus and MEDLINE.

Proprotein convertase subtilisin/kexin type 9 (PCSK9) is a secreted protein and its deficiency markedly enhances the survival rate of patients with cardiovascular diseases (CVDs). Forty berberine (BBR) derivatives I (R¹ = H, MeO, R² = MeO, OH, PhCH₂O, EtO, R³ = MeO, OH, EtO, R²R³ = OCH₂O, R⁴ = H, MeO, R⁵ = H, Cl, MeO, PhCH₂O, cyclobutylmethoxy, etc., R⁶ = MeO, OH, R⁷ = MeO, EtO, H) were synthesized and evaluated for their activity on down-regulating the transcription of PCSK9 in HepG2 cells, taking BBR as the lead. Structure-activity relationship (SAR) anal. revealed that the 2,3-dimethoxy moiety might be beneficial for activity. Among them, I (R¹ = R⁴ = R⁷ = H, R² = R³ = R⁶ = MeO, R⁵ = p-F₃CSC₆H₄CH₂O) (II) displayed the most potent activity with an IC₅₀ value of 9.5 ± 0.5μM, better than that of BBR. Also, it significantly decreased the PCSK9 protein level at the cellular level, as well as in the liver and serum of mice in vivo. Furthermore, II markedly increased LDLR expression and LDL-C clearance via down-regulating PCSK9 protein. The mechanism of action of II is targeting HNF1α and/or Sp1 cluster modulation upstream of PCSK9, a different one from BBR. Therefore, II might have the potential to be a novel PCSK9 transcriptional inhibitor for the treatment of atherosclerosis, worthy for further investigation.

Bioorganic Chemistry published new progress about 21101-63-3. 21101-63-3 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,sulfides,Benzyl bromide,Benzene, name is (4-(Bromomethyl)phenyl)(trifluoromethyl)sulfane, and the molecular formula is C8H6BrF3S, Application In Synthesis of 21101-63-3.

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

Wu, Bobin published the artcileSynthesis and Structure-Activity Relationship Studies of Quinoxaline Derivatives as Aldose Reductase Inhibitors, COA of Formula: C7H5Br2F, the publication is ChemMedChem (2013), 8(12), 1913-1917, database is CAplus and MEDLINE.

Neuropathy, nephropathy, retinopathy, and cataracts are common complications in people with chronic diabetes caused by insulin deficiency or insulin resistance. Previous studies have suggested that the polyol pathway becomes activated under hyperglycemic conditions, leading to accumulation of sorbitol and then to diabetic complications. Aldose reductase 2 inhibition could be a key to decreasing the accumulation of sorbitol. Aldose reductase inhibitors have attracted great attention for their potential to treat diabetic complications. This study focuses on new series of quinoxaline derivatives, their synthesis, Aldose reductase 2 inhibition and structure-activity relationships.

ChemMedChem 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 C7H13NO2, COA of Formula: C7H5Br2F.

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

Chen, Xin published the artcileDesign and synthesis of potent and selective aldose reductase inhibitors based on pyridylthiadiazine scaffold, Quality Control of 76283-09-5, the publication is European Journal of Medicinal Chemistry (2011), 46(5), 1536-1544, database is CAplus and MEDLINE.

A series of pyrido[2,3-e]-[1,2,4]-thiadiazine 1,1-dioxide acetic acid derivatives were synthesized and tested for their inhibitory activity against aldose reductase (ALR2). These derivatives were found to be potent aldose reductase inhibitors with IC₅₀ values ranging from 0.038 μM to 11.29 μM. Most but not all of them showed a strong ALR2 inhibition activity and significant selectivity, which were further supported by docking studies. Of these inhibitors, compound I exhibited highest inhibition activity. Structure-activity relationship studies indicate the requirement of N2-benzyl group with electron-withdrawing substituents and N4-acetic acid group in the pyridothiadiazine scaffold.

European 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, Quality Control of 76283-09-5.

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

Xu, Haowei published the artcileSynthesis of secondary amines with long chains containing ether bonds, Product Details of C12H25Br, the publication is Synlett (2022), 33(11), 1059-1064, database is CAplus.

A novel class of secondary amines with long chains containing ether bonds were synthesized by three-step protection-etherification-deprotection process from diethanolamine. The optimum reaction conditions were examined This method has the advantages of simplicity, low cost and high yield. Furthermore, some new downstream products (diglycolamides) were prepared from the ether-containing long-chain secondary amines as reactants and their loading capacities in extractions of several metal ions were evaluated.

Synlett published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C9H5ClO2, Product Details of C12H25Br.

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

Xu, Haowei published the artcileSynthesis of secondary amines with long chains containing ether bonds, Synthetic Route of 111-83-1, the publication is Synlett (2022), 33(11), 1059-1064, database is CAplus.

A novel class of secondary amines with long chains containing ether bonds were synthesized by three-step protection-etherification-deprotection process from diethanolamine. The optimum reaction conditions were examined This method has the advantages of simplicity, low cost and high yield. Furthermore, some new downstream products (diglycolamides) were prepared from the ether-containing long-chain secondary amines as reactants and their loading capacities in extractions of several metal ions were evaluated.

Synlett 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 C8H6BrF3S, Synthetic Route of 111-83-1.

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

Lin, Zhiwei published the artcileTopologically Directed Assemblies of Semiconducting Sphere-Rod Conjugates, Category: bromides-buliding-blocks, the publication is Journal of the American Chemical Society (2017), 139(51), 18616-18622, database is CAplus and MEDLINE.

Spontaneous organizations of designed elements with explicit shape and symmetry are essential for developing useful structures and materials. We report the topol. directed assemblies of four categories (a total of 24) of sphere-rod conjugates, composed of a sphere-like fullerene (C₆₀) derivative and a rod-like oligofluorene(s) (OF), both of which are promising organic semiconductor materials. Although the packing of either spheres or rods has been well-studied, conjugates having both shapes substantially enrich resultant assembled structures. Mandated by their shapes and topologies, directed assemblies of these conjugates result not only in diverse unconventional semiconducting supramol. lattices with controlled domain sizes but also in tunable charge transport properties of the resulting structures. These results demonstrate the importance of persistent mol. topol. on hierarchically assembled structures and their final properties.

Journal of the American Chemical Society published new progress about 957061-13-1. 957061-13-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronate Esters, name is 2-(4-(3-Bromopropoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C15H22BBrO3, Category: bromides-buliding-blocks.

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

Dutta, Shubham published the artcileKeteniminium-Driven Umpolung Difunctionalization of Ynamides, Application In Synthesis of 1228180-83-3, the publication is Angewandte Chemie, International Edition (2020), 59(27), 10785-10790, database is CAplus and MEDLINE.

A three-component Pd-catalyzed coupling of ynamides, aryl diazonium salts, and aryl boronic acids for the synthesis of novel triaryl-substituted enamides is described. This transformation represents the first example of an umpolung regioselective unsym. syn-1,2-diarylation/aryl-olefination of ynamides. The aryl moieties of the diazonium salt (electrophile) and boronic acid (nucleophile) are explicitly incorporated in the electrophilic α- and nucleophilic β-position, resp., of the ynamide, resulting in a single isomer of the N-bearing tetrasubstituted olefin. The scope is broad (68 examples), showing excellent functional-group tolerance. DFT calculations substantiate the rationale of the mechanistic cycle and the regioselectivity. The chemoselectivity and synthetic potential of the enamide products were also studied.

Angewandte Chemie, International Edition published new progress about 1228180-83-3. 1228180-83-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Boronic Acids, name is 3,4-Dibromophenylboronic acid, and the molecular formula is C6H5BBr2O2, Application In Synthesis of 1228180-83-3.

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

Jing, Liling published the artcileSynthesis and carbene-insertion preparation of hydrophobic natural polymer materials for rapid and efficient oil/water separation, Related Products of bromides-buliding-blocks, the publication is Applied Surface Science (2022), 152394, database is CAplus.

In response to frequent oil spills and increasing discharges of oily wastewater, a variety of materials and methods have been developed to treat with oil-water mixtures In this paper, a simple and versatile method to modify a broad spectrum of natural polymer surfaces (wood aerogel, pulpboard, filter paper, cotton cloth, electrospinning gelatin film, ultrafine polypropylene fiber) was reported. This modification was based on aryl diazo compounds with hydrophobic functional groups as precursors, which were thermally activated to generate highly active carbene intermediates and induce the X-H (X = O, C,…) insertion reaction on the surface of substrates. The success of surface modification was demonstrated by the irreversible changes of the surface properties and the application on multi-behavior oil/water separation Moreover, according to the Owens-Wendt-Rabel-Kaelble method, the influence of the dispersion force and the polar force on various material surfaces was given to explore the separation mechanism. This one-step modification provides a facile and efficient strategy to achieve renewable, biodegradable, and environmentally friendly materials and surfaces with low surface energy, which offers considerable potential applications on disposal of oil pollution in the environment.

Applied Surface Science published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C12H25Br, Related Products of bromides-buliding-blocks.

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