Author: Jessica.F

Sommers, Kyle J. published the artcileQuaternary Phosphonium Compounds: An Examination of Non-Nitrogenous Cationic Amphiphiles That Evade Disinfectant Resistance, Category: bromides-buliding-blocks, the publication is ACS Infectious Diseases (2022), 8(2), 387-397, database is CAplus and MEDLINE.

Quaternary ammonium compounds (QACs) serve as mainstays in the formulation of disinfectants and antiseptics. However, an over-reliance and misuse of our limited QAC arsenal has driven the development and spread of resistance to these compounds, as well as co-resistance to common antibiotics. Extensive use of these compounds throughout the COVID-19 pandemic thus raises concern for the accelerated proliferation of antimicrobial resistance and demands for next-generation antimicrobials with divergent architectures that may evade resistance. To this end, we endeavored to expand beyond canonical ammonium scaffolds and examine quaternary phosphonium compounds (QPCs). Accordingly, a synthetic and biol. investigation into a library of novel QPCs unveiled biscationic QPCs to be effective antimicrobial scaffolds with improved broad-spectrum activities compared to com. QACs. Notably, a subset of these compounds was found to be less effective against a known QAC-resistant strain of MRSA. Bioinformatic anal. revealed the unique presence of a family of small multiresistant transporter proteins, hypothesized to enable efflux-mediated resistance to QACs and QPCs. Further investigation of this resistance mechanism through efflux-pump inhibition and membrane depolarization assays illustrated the superior ability of P6P-10,10 to perturb the cell membrane and exert the observed broad-spectrum potency compared to its com. counterparts. Collectively, this work highlights the promise of biscationic phosphonium compounds as next-generation disinfectant mols. with potent bioactivities, thereby laying the foundation for future studies into the synthesis and biol. investigation of this nascent antimicrobial class.

ACS Infectious Diseases 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 C7H7ClN2S, Category: bromides-buliding-blocks.

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

Auwers, K. published the artcileDicarboxylic acids, C₈H₁₄O₄, Application In Synthesis of 56970-78-6, the publication is Berichte der Deutschen Chemischen Gesellschaft, 3005, database is CAplus.

Of the two acids obtained by the action of silver on ethyl α-bromisobutyrate (Abstract, 1889, 1145), the volatile acid is tetramethylsuccinic acid, whilst the non-volatile acid is symmetrical dimethyladipic acid, C₂H₄(CHMe.COOH)₂ (compare Zelinsky, preceding abstract). According to Hell (Ber., 10, 2229), a portion of the α-bromisobutyric acid decomposes into hydrogen bromide and methylacrylic acid, which unite, according to Fittig and Engelhorn (Annalen, 200, 65), to form β-bromisobutyric acid. The normal product of the action of silver on the latter would be the above dimethyladipic acid. In order to test the correctness of this view, the authors are studying β-bromisobutyric acid and especially its behaviour towards silver.

Berichte der Deutschen Chemischen Gesellschaft published new progress about 56970-78-6. 56970-78-6 belongs to bromides-buliding-blocks, auxiliary class Bromide,Carboxylic acid,Aliphatic hydrocarbon chain,Inhibitor, name is 3-Bromo-2-methylpropanoic acid, and the molecular formula is C4H7BrO2, Application In Synthesis of 56970-78-6.

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

Larsen, John W. published the artcileThermodynamic stabilities of some cyclic halonium ions in magic acid, SDS of cas: 594-81-0, the publication is Journal of the American Chemical Society (1972), 94(5), 1614-19, database is CAplus.

The heats of formation of a series of methyl-substituted ethylene- and tetramethylene-bromonium ions and a chloronium ion from the appropriate dihaloalkane precursors were measured calorimetrically in 11.5 mole % SbF5-F SO3H at -60°. The tetramethylenebromonium ions are about as stable as the tert-Bu cation and are ∼10 kcal/mole more stable than a correspondingly substituted ethylenebromonium ion. The tetramethylenechloronium ion is ∼7.5 kcal/mole less stable than its bromo analog. The interaction of a Me group with a 3-membered ring is unusually favorable.

Journal of the American Chemical Society 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, SDS of cas: 594-81-0.

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

Shu, Wei published the artcileVisible Light Mediated, Redox Neutral Remote 1,6-Difunctionalizations of Alkenes, Quality Control of 401-55-8, the publication is ACS Catalysis (2018), 8(7), 6401-6406, database is CAplus.

A photoinduced cascade strategy is presented here for the remote functionalization of alkenes under redox neutral conditions. A broad portfolio of alkyl groups has been added to double bonds to produce, upon 1,5-HAT, remote C-centered radicals which can be harvested in the presence of O- or C-nucleophiles to efficiently form Csp³-O and Csp³-Csp² bonds at room temperature

ACS Catalysis published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is C5H6N2O2, Quality Control of 401-55-8.

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

Kong, Haiyan published the artcileNovel 1-(prop-2-yn-1-ylamino)-2,3-dihydro-1H-indene-4-thiol derivatives as potent selective human monoamine oxidase B inhibitors: Design, SAR development, and biological evaluation, COA of Formula: C9H8BrF3, the publication is Bioorganic & Medicinal Chemistry Letters (2021), 128051, database is CAplus and MEDLINE.

Successes have been achieved in developing human monoamine oxidase B (hMAO-B) inhibitors as anti-Parkinson’s disease (PD) drugs. However, low efficiency and unwanted side effects of the marketed hMAO-B inhibitors hamper their medical applications, therefore, novel potent selective hMAO-B inhibitors are still of great interest. Herein we report 1-(prop-2-yn-1-ylamino)-2,3-dihydro-1H-indene-4-thiol derivatives as hMAO-B inhibitors, which were designed by employing a fragment-based drug design strategy to link rasagiline to hydrophobic fragments. Among the synthesized 31 compounds, I and II demonstrated very encouraging hMAO-B inhibitory activities and selectivity over hMAO-A, better than rasagiline and safinamide. In vitro studies indicated that K8 and K24 are nontoxic to nervous tissue cells and they have considerable effects against ROS formation and potential neuroprotective activity. Further mice behavioral tests demonstrated these two compounds have good therapeutic effects on MPTP-induced PD model mice. All these experiment results suggest that compounds K8 and K24 can be promising candidates for further research for treatment of PD.

Bioorganic & Medicinal Chemistry Letters published new progress about 1997-80-4. 1997-80-4 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,Benzene, name is 1-(2-Bromoethyl)-3-(trifluoromethyl)benzene, and the molecular formula is C9H8BrF3, COA of Formula: C9H8BrF3.

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

Dong, Changshuai published the artcileAn n-type narrow-bandgap organoboron polymer with quinoidal character synthesized by direct arylation polymerization, COA of Formula: C4Br2N2O4S, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2022), 10(7), 2718-2723, database is CAplus.

Narrow bandgap conjugated polymers have received great attention due to their wide applications in optoelectronic devices. Because of the synthetic difficulty, it is greatly challenging to develop n-type conjugated polymers with a narrow bandgap with quinoidal character. Herein, we report an n-type narrow-bandgap organoboron polymer with quinoidal character, PBN-TP. PBN-TP is designed with alternating units of BNBP (double B ← N bridged bipyridine) and quinoidal TP (thieno[3,4-b]pyrazine). Direct arylation polymerization of the di-bromo BNBP unit and the di-hydro TP unit affords the organoboron polymer with a high number-average mol. weight of 28.3 kDa. Compared with the control polymer with alternating units of BNBP and thiophene, PBN-T, the replacement of the thiophene unit with a quinoidal TP unit reduces the bond length alternation (BLA) of carbon-carbon bonds and planarized the polymer backbone of PBN-TP, leading to an enhanced contribution of the polymer quinoidal resonance structure. As a result, compared with PBN-T, PBN-TP shows a much reduced bandgap of 1.50 eV, which is among the lowest reported for n-type organoboron polymers based on BNBP. Moreover, due to the low LUMO energy level, PBN-TP could be readily n-doped and used as an n-type polymer thermoelec. material. This work provides a new n-type narrow bandgap conjugated polymer with quinoidal character.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices 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, COA of Formula: C4Br2N2O4S.

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

Abd Karim, Nurul H. published the artcileSalphen metal complexes as tunable G-quadruplex binders and optical probes, Related Products of bromides-buliding-blocks, the publication is RSC Advances (2014), 4(7), 3355-3363, database is CAplus.

A series of seven new metal complexes (metal = Ni^II, Cu^II, Pt^II and VO²⁺) with substituted salphen ligands have been prepared and their duplex and G-quadruplex DNA affinities determined The selectivity of the complexes towards a given DNA topol. is dictated by several factors including geometry, overall charge and substitution pattern of the complex. Also the two platinum(II)-salphen complexes developed as part of this series are emissive. Confocal microscopy studies were carried out with these two complexes using four different cell lines (CHO, HeLa, U2OS and HepG2). The cell permeability and localization are different for the two probes and highly dependent on the cell line used.

RSC Advances 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, Related Products of bromides-buliding-blocks.

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

D’yachenko, A. I. published the artcilePreparation of spiro[2.4]-4,6-heptadienes by the cycloalkylation of 1,3-cyclopentadiene with 1,2-dibromoalkanes under phase transfer catalysis conditions, Computed Properties of 594-81-0, the publication is Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya (1984), 1664-6, database is CAplus.

Cycloalkylation of cyclopentadiene with RCHBrCHBrR¹ (R = R¹ = H, Me; R = H, R¹ = Me) in 50% aqueous NaOH containing PhCH₂NEt₃⁺ Cl^– in 1.1:1:4:0.005-0.02 molar ratio gave 70-85% title compounds (I; same R, R¹). No I were obtained with BrCMe₂ZBr (Z = CH₂, CHMe, CMe₂).

Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya 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, Computed Properties of 594-81-0.

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

Eckstein, Brian J. published the artcileButa-1,3-diyne-Based π-Conjugated Polymers for Organic Transistors and Solar Cells, Application In Synthesis of 303734-52-3, the publication is Macromolecules (Washington, DC, United States) (2017), 50(4), 1430-1441, database is CAplus.

We report the synthesis and characterization of new alkyl-substituted 1,4-di(thiophen-2-yl)buta-1,3-diyne (R-DTB) donor building blocks, based on the -CC-CC- conjugative pathway, and their incorporation with thienyl-diketopyrrolopyrrole (R’-TDPP) acceptor units into π-conjugated PTDPP-DTB polymers (P1-P4). The solubility of the new polymers strongly depends on the DTB and DPP solubilizing (R and R’, resp.) substituents. Thus, solution processable and high mol. weight PDPP-DTB polymers are achieved for P3 (R = n-C₁₂H₂₅, R’ = 2-butyloctyl) and P4 (R = 2-ethylhexyl, R’ = 2-butyloctyl). Systematic studies of P3 and P4 physicochem. properties are carried using optical spectroscopy, cyclic voltammetry, and thermal anal., revealing characteristic features of the dialkynyl motif. For the first time, optoelectronic devices (OFETs, OPVs) are fabricated with 1,3-butadiyne containing organic semiconductors. OFET hole mobilities and record OPV power conversion efficiencies for acetylenic organic materials approach 0.1 cm²/(V s) and 4% resp., which can be understood from detailed thin-film morphol. and microstructural characterization using AFM, TEM, x-ray diffraction, and GIWAXS methodologies. Importantly, DTB-based polymers (P3 and P4) exhibit, in addition to stabilization of frontier MOs and to -CC-CC- relief of steric torsions, discrete morphol. pliability through thermal annealing and processing additives. The advantageous materials properties and preliminary device performance reported here demonstrate the promise of 1,3-butadiyne-based semiconducting polymers.

Macromolecules (Washington, DC, United States) 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, Application In Synthesis of 303734-52-3.

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

Poslusney, Michael S. published the artcileSpirocyclic replacements for the isatin in the highly selective, muscarinic M₁ PAM ML137: The continued optimization of an MLPCN probe molecule, Category: bromides-buliding-blocks, the publication is Bioorganic & Medicinal Chemistry Letters (2013), 23(6), 1860-1864, database is CAplus and MEDLINE.

This Letter describes the further optimization of an MLPCN probe mol. (ML137) through the introduction of 5- and 6-membered spirocycles in place of the isatin ketone. Interestingly divergent structure-activity relationships, when compared to earlier M₁ PAMs, are presented. These novel spirocycles, e.g. I, possess improved efficacy relative to ML137, while also maintaining high selectivity for the human and rat muscarinic M₁ receptor subtype.

Bioorganic & Medicinal Chemistry Letters 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, Category: bromides-buliding-blocks.

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