Category: bromides-buliding-blocks

Iron-catalyzed C(sp²)-H alkylation of carboxamides with primary electrophiles was written by Monks, Brendan M.;Fruchey, Erin R.;Cook, Silas P.. And the article was included in Angewandte Chemie, International Edition in 2014.Electric Literature of C5H11BrO This article mentions the following:

A robust iron-catalyzed ortho alkylation of aryl amides was carried out. The reaction generally proceeds in high yields with exceptional regioselectivity. The reaction is complete in less than 10 min and can be performed in bio-derived 2-methyltetrahydrofuran as solvent on gram scale. The reactivity and selectivity provides a reaction profile unique among the reported C-H functionalization reactions, thereby complementing current strategies. The low cost and toxicity of the reagents should simplify the large-scale implementation of this C-H functionalization. Moreover, mechanistic experiments indicate that substrate coordination is irreversible and occurs prior to C-H cleavage. Further efforts will be directed toward mechanistic understanding and expanding the scope of this interesting transformation. © 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. In the experiment, the researchers used many compounds, for example, 1-Bromo-4-methoxybutane (cas: 4457-67-4Electric Literature of C5H11BrO).

1-Bromo-4-methoxybutane (cas: 4457-67-4) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Electric Literature of C5H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Mechanism and solvent reorganization accompanying hydrolyses of anchimerically assisted alkyl halides in water was written by Blandamer, Michael J.;Golinkin, G. S.;Robertson, Ross E.. And the article was included in Journal of the American Chemical Society in 1969.Application In Synthesis of 1-Bromo-4-methoxybutane This article mentions the following:

This paper deals with the problem of solvent reorganization, anchimeric assistance, and mechanism for hydrolysis of 9 alkyl halides where the neighboring group is -OH, -OMe, or -SMe. By using the temperature coefficient of the enthalpy as a gauge of relative solvent reorganization, we show that the transition state in the hydrolysis of those alkyl halides giving evidence of anchimeric assistance resembles that for an SN1 mechanism. This conclusion was supported in one case by 13C labeling experiments in spite of product analysis seemingly favoring SN2 nucleophilic displacement by the solvent. In the experiment, the researchers used many compounds, for example, 1-Bromo-4-methoxybutane (cas: 4457-67-4Application In Synthesis of 1-Bromo-4-methoxybutane).

1-Bromo-4-methoxybutane (cas: 4457-67-4) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Application In Synthesis of 1-Bromo-4-methoxybutane

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Photochemistry of N-(selenoalkyl)-phthalimides. Formation of N, Se-heterocyclic systems was written by Oksdath-Mansilla, Gabriela;Heredia, Adrian A.;Arguello, Juan E.;Penenory, Alicia B.. And the article was included in Photochemical & Photobiological Sciences in 2015.Computed Properties of C13H14BrNO2 This article mentions the following:

A variety of N-(selenomethyl)alkyl-phthalimides (alkyl = -(CH₂)_n, n = 2-5) and N-(selenobenzyl)propyl phthalimide were synthesized and their photochem. was studied at λ = 300 nm. Steady-state photolysis and laser time-resolved spectroscopy studies confirmed that these reactions proceeded by direct or acetone-sensitized excitation followed by intramol. electron transfer (ET) between Se atom and the phthalimide moiety. Two main pathways are possible after ET, proton transfer to the ketyl radical anion from the CH₃Se^+. or the -CH₂Se^+.– moieties, yielding the corresponding biradicals. Collapse of these biradicals yields cyclization products with the resp. endo or exo selenium-containing heterocycles. Competition between both proton transfer processes depends on the chain length of the alkyl spacer between the phthalimide and Se groups as well as the size of the cycle being formed. In the experiment, the researchers used many compounds, for example, N-(5-Bromopentyl)phthalimide (cas: 954-81-4Computed Properties of C13H14BrNO2).

N-(5-Bromopentyl)phthalimide (cas: 954-81-4) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Computed Properties of C13H14BrNO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Inclusion function of heptakis[6-(alkylthio)-6-deoxy-2-O-sulfo]-β-cyclodextrins, cylindrical surfactants derived from β-cyclodextrin. A study by fluorescent probes was written by Takahashi, Hisao;Irinatsu, Yuichi;Tsujimoto, Munekazu;Kozuka, Seizi;Tagaki, Waichiro. And the article was included in Nippon Kagaku Kaishi in 1987.SDS of cas: 53784-83-1 This article mentions the following:

Title compounds were synthesized by selective modification of β-cyclodextrin (β-CD), as a novel class of anionic cylindrical surfactants. Their inclusion functions were studied in water by using fluorescent probes as the guests. Their binding ability for the neutral probe 1-phenylnaphthalene was more than 10-fold stronger than that of β-CD; it was independent of mol. aggregation of the surfactant monomer. Inclusion occurs at the inside of a hydrophobic cavity undergoing the strong influence of the electrostatic effect of anionic sulfate groups and the effect of the chain length of the alkylthio groups. In the experiment, the researchers used many compounds, for example, Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin (cas: 53784-83-1SDS of cas: 53784-83-1).

Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin (cas: 53784-83-1) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.SDS of cas: 53784-83-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sources of carbon dioxide formed during coal pyrolysis was written by Chatterjee, Kuntal;Bal, Balkrishna;Stock, Leon M.;Zabransky, Robert F.. And the article was included in Energy & Fuels in 1989.SDS of cas: 57293-19-3 This article mentions the following:

The CO₂ yield in coal pyrolysis is not uniquely dependent on the concentration of carboxyl groups in the coal. Other O-containing functional groups or coal mineral matter contribute to CO₂ formation. These conclusions are drawn from the results from pyrolysis of Wyodak and Illinois Number 6 coals that were modified by removal of carboxylic acids or by the incorporation of aliphatic or aromatic esters or aromatic methoxy groups. The coals were selectively O-alkylated. In the experiment, the researchers used many compounds, for example, 1-(3-Bromopropyl)-4-methoxybenzene (cas: 57293-19-3SDS of cas: 57293-19-3).

1-(3-Bromopropyl)-4-methoxybenzene (cas: 57293-19-3) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.SDS of cas: 57293-19-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Solvolysis in hydrogen and deuterium oxide. IV. Halides with neighboring groups was written by Laughton, P. M.;Robertson, R. E.. And the article was included in Canadian Journal of Chemistry in 1961.Related Products of 4457-67-4 This article mentions the following:

Rate ratios k_D2O÷k_H2O were determined for 23 halides with HO, MeO, or halogen substituents, and compared to the data for Me₂CHBr at the same temperature The compounds fell into 3 classes: normal, including compounds showing no anchimeric assistance and the dihalides; low ratios, including compounds assisted by an adjacent HO group [HOCMe₂CH₂Cl (I) and Br, HOCMe₂CHMeCl and Br, and trans-cyclohexene bromohydrin]; high ratios, including HO(CH₂)₄Cl and compounds assisted by MeO group [MeO(CH₂)₄Cl (II) and Br, MeOCMe₂CH₂Br (III), and MeOCMe₂CHMeBr]. These results were attributed to differing effects on the solvent shell, resulting from involvement of the intramol. nucleophiles. In addition to b.p. and n_D of compounds studied, the following new preparations were reported (compound, b.p., n²⁵_D, and reagents used in preparation): HOCH₂CH₂I, 88° (30 mm.), 1.5625, NaI and HOCH₂CH₂Cl; MeO(CH₂)₃Br (IV), 129°, 1.4448 (26°), NaOMe and Br(CH₂)₃Br; MeO(CH₂)₃I, 155-8°, 1.4873 (27°), NaI and IV; I, 56° (40 mm.), 1.4260, Me₂C:CH₂ and HOCl in aqueous AcOH; II, 48-53° (20 mm.), 1.4290, NaOMe and Cl(CH₂)₄Cl; MeOCH₂CMe₂Cl, 88-90°, 1.4039 (24°), corresponding alc.; III, -, 1.4575, Me₂C:CH₂ and methanolic N-bromosuccinimide. In the experiment, the researchers used many compounds, for example, 1-Bromo-4-methoxybutane (cas: 4457-67-4Related Products of 4457-67-4).

1-Bromo-4-methoxybutane (cas: 4457-67-4) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Related Products of 4457-67-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Discovery of N-Ethyl-4-[2-(4-fluoro-2,6-dimethyl-phenoxy)-5-(1-hydroxy-1-methyl-ethyl)phenyl]-6-methyl-7-oxo-1H-pyrrolo[2,3-c]pyridine-2-carboxamide (ABBV-744), a BET Bromodomain Inhibitor with Selectivity for the Second Bromodomain was written by Sheppard, George S.;Wang, Le;Fidanze, Steven D.;Hasvold, Lisa A.;Liu, Dachun;Pratt, John K.;Park, Chang H.;Longenecker, Kenton;Qiu, Wei;Torrent, Maricel;Kovar, Peter J.;Bui, Mai;Faivre, Emily;Huang, Xiaoli;Lin, Xiaoyu;Wilcox, Denise;Zhang, Lu;Shen, Yu;Albert, Daniel H.;Magoc, Terrance J.;Rajaraman, Ganesh;Kati, Warren M.;McDaniel, Keith F.. And the article was included in Journal of Medicinal Chemistry in 2020.COA of Formula: C9H11Br This article mentions the following:

The BET family of proteins consists of BRD2, BRD3, BRD4, and BRDt. Each protein contains two distinct bromodomains (BD1 and BD2). BET family bromodomain inhibitors under clin. development for oncol. bind to each of the eight bromodomains with similar affinities. We hypothesized that it may be possible to achieve an improved therapeutic index by selectively targeting subsets of the BET bromodomains. Both BD1 and BD2 are highly conserved across family members (>70% identity), whereas BD1 and BD2 from the same protein exhibit a larger degree of divergence (~40% identity), suggesting selectivity between BD1 and BD2 of all family members would be more straightforward to achieve. Exploiting the Asp144/His437 and Ile146/Val439 sequence differences (BRD4 BD1/BD2 numbering) allowed the identification of compound 27 demonstrating greater than 100-fold selectivity for BRD4 BD2 over BRD4 BD1. Further optimization to improve BD2 selectivity and oral bioavailability resulted in the clin. development compound 46 (ABBV-744). In the experiment, the researchers used many compounds, for example, 2-(Bromomethyl)-1,3-dimethylbenzene (cas: 83902-02-7COA of Formula: C9H11Br).

2-(Bromomethyl)-1,3-dimethylbenzene (cas: 83902-02-7) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.COA of Formula: C9H11Br

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Generation of Iminyl Copper Species from α-Azido Carbonyl Compounds and Their Catalytic C-C Bond Cleavage under an Oxygen Atmosphere was written by Chiba, Shunsuke;Zhang, Line;Ang, Gim Yean;Hui, Benjamin Wei-Qiang. And the article was included in Organic Letters in 2010.Formula: C10H11BrO2 This article mentions the following:

A copper-catalyzed reaction of α-azidocarbonyl compounds under an oxygen atm. is reported where nitriles are formed via C-C bond cleavage of a transient iminyl copper intermediate. The transformation is carried out by a sequence of denitrogenative formation of iminyl copper species from α-azidocarbonyl compounds and their C-C bond cleavage, where mol. oxygen (1 atm) is a prerequisite to achieve the catalytic process and one of the oxygen atoms of O₂ was found to be incorporated into the β-carbon fragment as a carboxylic acid. In the experiment, the researchers used many compounds, for example, Ethyl (2-bromophenyl)acetate (cas: 2178-24-7Formula: C10H11BrO2).

Ethyl (2-bromophenyl)acetate (cas: 2178-24-7) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Formula: C10H11BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

HDAC4 Inhibitors with Cyclic Linker and Non-hydroxamate Zinc Binding Group: Design, Synthesis, HDAC Screening and in vitro Cytotoxicity evaluation. was written by Tilekar, Kalpana;Hess, Jessica D.;Upadhyay, Neha;Schweipert, Markus;Flath, Felix;Gutierrez, Denisse A.;Loiodice, Fulvio;Lavecchia, Antonio;Meyer-Almes, Franz-Josef;Aguilera, Renato J.;Ramaa, C. S.. And the article was included in ChemistrySelect in 2021.Application of 615-55-4 This article mentions the following:

Recent evidences highlight the usefulness of small mol. (Histone deacetylase 4) HDAC4 inhibitors in the several preclin. paradigms. Major toxicity and mutagenicity issues associated with hydroxamate HDAC inhibitors, stimulated us to develop potent non-hydroxamate inhibitors. In the present work a novel series of thiazolidinedione (TZD) derivatives with pyridine as cyclic linker and TZD ring as zinc binding group was designed and screened in a panel of isoenzymes of HDACs, wherein the most potent compounds exhibiting HDAC4 IC₅₀-values<5 μM were 5 v, 5 w, 5 y and 5 z (IC₅₀=4.2±1 μM, 0.75±0.03 μM, 4.9±0.5 and 2.3±0.5 μM, resp.). The docking studies displayed the unique binding mode of this series of compound at active site of HDAC4, wherein TZD ring was indicated as zinc binding group. Further, 5 w and 5 y were found as the most potent antiproliferative agent in lymphoblastic leukemia (CCRF-CEM) and breast cancer MDA-MB-231 cells. Compound 5 y was found to induce the apoptosis and DNA fragmentation of CEM cells. The western blotting anal. of 5 y also showed the presence of cleaved caspases supporting their apoptotic nature. Further, Class IIa (HDAC4) selectivity of 5 y was also supported by western blotting observations, wherein 5 y caused the accumulation of acetylated H3 but not of acetylated Tubulin. Thus, our findings endorse the further investigation of this series of compounds for their potential as targeted cancer therapeutic agents. In the experiment, the researchers used many compounds, for example, 3,4-Dibromoaniline (cas: 615-55-4Application of 615-55-4).

3,4-Dibromoaniline (cas: 615-55-4) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Application of 615-55-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Understanding Molecular Factors That Determine Performance in the Rare Earth (TriNOx) Separations System was written by Cole, Bren E.;Cheisson, Thibault;Nelson, Joshua J. M.;Higgins, Robert F.;Gau, Michael R.;Carroll, Patrick J.;Schelter, Eric J.. And the article was included in ACS Sustainable Chemistry & Engineering in 2020.Application of 85118-24-7 This article mentions the following:

Rare earth metal complexes of the proligand: H₃TriNOx ([(2-tBuNOH)C₆H₃CH₂]₃N), have been shown to afford separations of simple mixtures of rare earth metal salts. In particular, separations systems were developed for applications to technol. relevant mixtures, e.g. Nd/Dy, and Eu/Y, for targeted, rare earths recycling chem. More recently, an electron-donating derivative of the proligand H₃TriNOxR (([(2-tBuNOH)C₆H₃RCH₂]₃N); R = 5-OMe) influenced the electronic and phys. properties to effect improved separations To further probe substituent effects, in the current work, derivatives with electron-donating and -withdrawing groups along the aryl-backbone were synthesized (R = 4-tBu, 5-Ph, 4-CF₃). The new proligands were coordinated to rare earths (RE) through protonolysis reactions and the resulting complexes (RE = Nd, Dy) were characterized. Dimerization equilibrium constants and molar solubility were determined where applicable. Overall, the studies indicated that increased electron-donation of the aryl-substituents resulted in an increased driving force for the dimerization of the Nd complexes. This dimerization equilibrium and resultant solubility differences were used to sep. mixtures of neodymium/dysprosium, as well as mixtures of europium/yttrium. These findings demonstrate the tunability of the TriNOx^3- framework to achieve tailored RE separations In the experiment, the researchers used many compounds, for example, 2-Bromo-4-(trifluoromethyl)benzaldehyde (cas: 85118-24-7Application of 85118-24-7).

2-Bromo-4-(trifluoromethyl)benzaldehyde (cas: 85118-24-7) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Application of 85118-24-7

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary