Tag: M.W=150-200

Adam, Rosa published the artcileSelf-Assembly of Catalytically Active Supramolecular Coordination Compounds within Metal-Organic Frameworks, Category: bromides-buliding-blocks, the publication is Journal of the American Chemical Society (2019), 141(26), 10350-10360, database is CAplus and MEDLINE.

Supramol. coordination compounds (SCCs) represent the power of coordination chem. methodologies to self-assemble discrete architectures with targeted properties. SCCs are generally synthesized in solution, with isolated fully coordinated metal atoms as structural nodes, thus severely limited as metal-based catalysts. Metal-organic frameworks (MOFs) show unique features to act as chem. nanoreactors for the in situ synthesis and stabilization of otherwise not accessible functional species. Here, authors present the self-assembly of Pd^II SCCs within the confined space of a pre-formed MOF (SCCs@MOF) and its post-assembly metalation to give a Pd^II-Au^III supramol. assembly, crystallog. underpinned. These SCCs@MOFs catalyze the coupling of boronic acids and/or alkynes, representative multi-site metal-catalyzed reactions in which traditional SCCs tend to decompose, and retain their structural integrity as a consequence of the synergetic hybridization between SCCs and MOFs. These results open new avenues in both the synthesis of novel SCCs and their use in heterogeneous metal-based supramol. catalysis.

Journal of the American Chemical Society published new progress about 16523-02-7. 16523-02-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Sulfone,Aliphatic hydrocarbon chain, name is 2-Bromoethyl Methyl Sulfone, and the molecular formula is C3H7BrO2S, Category: bromides-buliding-blocks.

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

Noorani, Narmin published the artcileCarbon dioxide adsorption onto modified polyvinyl chloride with ionic liquid, Category: bromides-buliding-blocks, the publication is Journal of Polymer Engineering (2022), 42(6), 498-506, database is CAplus.

To modify polyvinylchloride membranes for carbon dioxide gas separation, six polyvinyl chloride-g-polyionic liquid ionomers such as polyvinylchloride-g-poly1-vinyl-3-hexylimidazolium bromide (PVC-g-P[VHIm][Br]), polyvinylchloride-g-poly1-vinyl-3-hexylimidazolium thiocyanate (PVC-g-P[VHIm][SCN]), polyvinylchloride-g-poly1-vinyl-3-hexylimidazolium tetrafluoroborate (PVC-g-P[VHIm][BF₄]), polyvinylchloride-g-poly1-vinyl-3-octylimidazolium bromide (PVC-g-P[VOIm][Br]), polyvinylchloride-g-poly1-vinyl-3-octylimidazolium thiocyanate (PVC-g-P[VOIm][SCN]) and polyvinylchloride-g-poly1-vinyl-3-octylimidazolium tetrafluoroborate (PVC-g-P[VOIm][BF₄]) were synthesized. The polyvinyl chloride-g-polyionic liquid ionomers were characterized using elemental analyzer (CHN) and Fourier transform IR spectroscopy (FTIR) techniques. CO₂ adsorption onto these ionomers was measured by quartz crystal microbalance (QCM) and the exptl. data were correlated by the sorption model. The parameters obtained imply that CO₂ adsorption has an exothermic and physisorption nature. Also, the investigations point to that the PVC-g-P[VHIm][SCN] has better performance for CO₂ separation

Journal of Polymer Engineering 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, Category: bromides-buliding-blocks.

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

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

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

Wotiz, John H. published the artcileThe infrared spectra of a number of isomeric normal acetylenic compounds, Product Details of C7H11Br, the publication is Journal of the American Chemical Society (1949), 3441-4, database is CAplus.

The infrared spectra of 28 normal acetylenic compounds and four substituted normal heptanes, C₅H₁₁CCH, C₄H₉CCCH₃, C₃H₇CC₂H₅, CH₆CC(CH₂)₄C, C₂H₅CC(CH₂)₃Cl, C₄H₉CCCH₂C, CH₃(CH₂)₆Br, HCC(CH₂)₅Br, CH₃CC(CH₂)₄Br, C₃H₇CC(CH₂)₂Br, C₄H₉CCCH₂Br, C₅H₁₁CCBr, CH₃(CH₂)₆OH, HCC(CH₂)₅OH, CH₃CC(CH₂)₄OH, C₂H₅CC(CH₂)₃OH, C₃H₇CC(CH₂)₂OH, C₄H₉CCCH₂OH, CH₃(CH₂)₆CN₂ HCC(CH₂)₅CN, CH₃CC(CH₂)₄CN, C₂H₅CC(CH₂)₃CN, C₃H₇CC(CH₂)₂CN, C₄H₉CCCH₂CN, C₅H₁₁CCCN, CH₃ (CH₂)₆CO₂CH₃, HCC(CH₂)₅CO₂CH₃, CH₃, C(CH₂)₄CO₂CH₃, C₂H₅CC(CH₂)₃CO₂CH₃, C₃H₇CC(CH₂)₂CO₂CH₃, C₄H₉CCCH₂CO₂CH₃, C₅H₁₁CCCO₂CH₃ are presented. The intensity of the CC band is observed to vary greatly. The band is most intense when the triple bond is near the end of the chain. If the triple bond is three or more positions from the end, the band is scarcely detectable.

Journal of the American Chemical Society published new progress about 81216-14-0. 81216-14-0 belongs to bromides-buliding-blocks, auxiliary class Linker,PROTAC Linker, name is 7-Bromohept-1-yne, and the molecular formula is C6H13BO3, Product Details of C7H11Br.

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

Guan, Yu-Qing published the artcileThe serendipitous effect of KF in Ritter reaction: Photo-induced amino-alkylation of alkenes, HPLC of Formula: 401-55-8, the publication is iScience (2021), 24(9), 102969, database is CAplus and MEDLINE.

The Ritter reaction has been recognized as an elegant strategy to construct the C-N bond. Its key feature is forming the carbocation for nucleophilic attack by nitriles. Herein, authors report a complementary visible-light-induced three-component Ritter reaction of alkenes, nitriles, and α-bromo nitriles/esters, thereby providing mild and rapid access to various γ-amino nitriles/acids. Mechanistic studies indicated that traceless fluoride relay, transforming KF into imidoyl fluoride intermediate, is critical for the efficient reaction switch from atom transfer radical addition (ATRA) to the Ritter reaction. This approach to amino-alkylation of alkenes is chemoselective and operationally simple.

iScience 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 C4H6BrFO2, HPLC of Formula: 401-55-8.

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

Hernandez-Bravo, Raiza published the artcileExperimental and theoretical study on the effectiveness of ionic liquids as corrosion inhibitors, COA of Formula: C8H17Br, the publication is Computational & Theoretical Chemistry (2022), 113640, database is CAplus.

An exptl. and computational study, using a D. Functional Theory approach, was made about the anticorrosive effect of ionic liquids on hematite surfaces. Based on the hypothesis that adsorption is an initial step in the kinetics of corrosion, followed by electron transfer processes, adsorption energy calculations and corrosion rates are determined to investigate the effect as corrosion inhibitor of ionic liquids mols. Several, potential descriptors of the inhibitor performance, conceptualized as an electrochem. process, based on the frontier orbital theory were used to characterize the interactions that might inhibit the corrosion, including the energies of the highest occupied (E_LUMO) and lowest unoccupied (E_HOMO) MOs, the energy gap between orbitals, crossed energies differences between HOMO and LUMO of the intervening chem. species and the surface, electronegativity (χ), hardness (η), and number of transferred electrons (ΔN). The main conclusion is that although the adsorption energy is a key parameter in establishing a correlation between calculated parameters and the exptl. characterization of the ILs, the remaining chem. predictors also play an important role on the descriptions of activity corrosion, especially the electronegativity difference between surface and ILs, and the hardness of the IL.

Computational & Theoretical 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, COA of Formula: C8H17Br.

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

Yu, Wan-Ning published the artcileEffect of elimination on antifouling and pH-responsive properties of carboxybetaine materials, Application In Synthesis of 56970-78-6, the publication is Chemical Communications (Cambridge, United Kingdom) (2017), 53(65), 9143-9146, database is CAplus and MEDLINE.

Carboxybetaine (CB)-based zwitterionic materials have attracted considerable attention due to their dual antifouling and functionalizable properties. In this communication, the elimination effect on the antifouling and pH-responsive properties of CB materials was investigated. We synthesize β- and α-substituted Me CB materials to investigate the occurrence of elimination in the ethylene intercharge arm in a harsh basic solution This work provides mol. understanding of a structure-property relationship of the CB moiety for material development.

Chemical Communications (Cambridge, United Kingdom) 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 C12H10FeO4, Application In Synthesis of 56970-78-6.

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

Bielefeld, Jens published the artcileHydroaminoalkylation of Allenes, Related Products of bromides-buliding-blocks, the publication is Synlett (2019), 30(8), 967-971, database is CAplus.

The first examples of early-transition-metal-catalyzed hydroaminoalkylation reactions of allenes are reported. Initial studies performed with secondary aminoallenes led to the identification of a suitable titanium catalyst and revealed that under the reaction conditions, the initially formed hydroaminoalkylation products undergo an unexpected titanium-catalyzed rearrangement to form the thermodynamically more stable allylamines. The assumption that this rearrangement involves a reactive allylic cation intermediate provides a simple explanation of the fact that no successful early-transition-metal-catalyzed hydroaminoalkylations of allenes have previously been reported. As a result of the generation of the corresponding cation, the titanium-catalyzed intermol. hydroaminoalkylation of propa-1,2-diene unexpectedly gives an aminocyclopentane product formed by incorporation of two equivalent of propa-1,2-diene.

Synlett published new progress about 81216-14-0. 81216-14-0 belongs to bromides-buliding-blocks, auxiliary class Linker,PROTAC Linker, name is 7-Bromohept-1-yne, and the molecular formula is C7H11Br, Related Products of bromides-buliding-blocks.

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