Category: bromides-buliding-blocks

Doig, Adrian I. published the artcileSynthesis, Catalytic GPx-like Activity, and SET Reactions of Conformationally Constrained 2,7-Dialkoxy-Substituted Naphthalene-1,8-peri-diselenides, Product Details of C12H25Br, the publication is ACS Omega (2022), 7(31), 27312-27323, database is CAplus and MEDLINE.

Several 2,7-dialkoxy-substituted naphthalene-1,8-peri-diselenides were prepared and tested for catalytic antioxidant activity in NMR-based assay employing the reduction of hydrogen peroxide with stoichiometric amounts of benzyl thiol. Acidic conditions enhanced their catalytic activity, whereas basic conditions suppressed it. The highest activity was observed with 2,7-bis(triethyleneglycol) derivative These compounds serve as mimetics of the antioxidant selenoenzyme glutathione peroxidase. Studies based on NMR peak-broadening effects and EPR spectroscopy indicated that a thiol-dependent SET reaction occurs under the conditions of assay, which can be reversed by the addition of triethylamine. In contrast, peak broadening induced by proton-catalyzed electron transfer during the treatment of naphthalene-1,8-peri-diselenides with trifluoroacetic acid can be suppressed by the addition of excess thiol. These observations provide new insights into the redox mechanisms of these processes.

ACS Omega 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, Product Details of C12H25Br.

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

Vetter, Walter published the artcileIdentification and quantification of new polybrominated di-methoxybiphenyls (PBDMBS) in marine mammals from Australia, Recommanded Product: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, the publication is Organohalogen Compounds (2008), 2388-2391, database is CAplus.

This study aims to verify the hypothesis by the photolytical debromination as well as synthesis of dibromo and tribromo congeners related to 2,2′-diMeO-BB 80, followed by the screening of these products in environmental samples. Using the authentic standard of 2,2′-diMeO-BB 80, it was for the first time possible to quantify residues of 2,2′-diMeO-BB 80 in blubber of dolphins and cetaceans from Australia. Moreover, the calibrated solution of lower BDMBs offered the opportunity to determine these debromination products of 2,2′-diMeO-BB 80 as well. The concentrations of the 2,2′-diMeO-BB 80 related BDMBs were 0.43-1.5% of 2,2′-diMeO-BB 80.

Organohalogen Compounds 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 C10H10O6, Recommanded Product: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide.

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

Pilat, S. published the artcileFormation of cyclopentylalkanesulfonates, Product Details of C7H13Br, the publication is Berichte der Deutschen Chemischen Gesellschaft [Abteilung] B: Abhandlungen (1939), 1527-31, database is CAplus.

The Na naphthenesulfonates obtained from natural naphthenic acids through the naphthenyl alcs. and chlorides (C. A. 32, 8753.5) are characterized by their excellent foaming and wetting properties in aqueous solution For comparison with these substances, whose structure has not been fully cleared up, P. and T. undertook the preparation of some cyclic sulfonates (chiefly cyclopentane derivatives, since the naphthenic acids in petroleums are for the most part derived from cyclopentane) in which the sulfonic acid is in primary combination, i. e., as CH₂SO₃H. The starting point for the preparation of sulfonates with a straight alkyl chain, C₅H₉(CH₂)_nSO₃Na (n = 2, 4 or 7) was cyclopentanol, which was converted with boiling concentrated HCl and CaCl₂ into the chloride (87% yield); this through the Grignard reagent with HCHO gave the carbinol, C₅H₉CH₂OH, which, in turn, was converted into the chloride. 2-Cyclopentylethanol (I) and 4-cyclopentylbutanol (II), as also 2-menthylethanol (III), were prepared by the Grignard method for introducing CH₂.CH₂ chains: RMgBr + CH₂.CH₂.O → RCH₂CH₂OMgBr. Chains of 3 CH₂ groups were introduced by treating Grignard compounds with p-MeC₆H₄SO₃(CH₂)₃Cl (IV) or with trimethylene oxide; in this way (7-chloroheptyl)cyclopentane (V) was prepared from C₅H₉(CH₂)₄Br and II from C₅H₉CH₂Cl. For the preparation of sulfonates with a branched chain fenchone was used, which was converted by KOH at 240° into fencholic acid (VI). Reduction of the Et ester of VI gave fencholyl alc. (VII), converted with PCl₅ into the chloride, which with Na₂SO₃ gave 50% Na fencholylsulfonate and, through fencholylmalonic acid, yielded fencholylacetic acid (VIII). Reduction of the Et ester of VIII, conversion of the 2-fencholylethanol (IX) into the chloride and subsequent Strecker reaction yielded Na fencholylethanesulfonate (50% yield), very hygroscopic. Investigation of aqueous solutions of the Na salts so obtained, which will be described in detail later, showed, among other things, that sulfonates in which a cyclopentane ring carries small alkyl groups are characterized by an especially high degree of surface activity and in this respect surpass both cyclopentanes with a long side chain and alkylated cyclohexanes. I, b₁₁ 85°, was obtained in 45% yield by a modification of the Yohe and Adams method (C. A. 22, 2148). Chloride (71% from I and 1.1 mols. PCl₅ refluxed 2 h. in petr. ether), b₆₀ 85-6°, d₄²⁰ 0.955, n_D²⁰ 1.4527; 26.5 g. heated 8 h. at 200° with 80 g. crystallized Na₂SO₃ in an autoclave, with stirring, gave 39 g. (97.5%) Na 2-cyclopentylethanesulfonate, silvery non-hygroscopic needles. (2-Bromoethyl)cyclopentane (71.2% from I heated 2.5 h. with HBr-concentrated H₂SO₄), b₁₉ 77°, d₄²⁰ 1.290, n_D²⁰ 1.4865; its Grignard reagent with ethylene oxide gave 68% II, b₂ 87-92°, n_D²⁰ 1.4610, d₄²⁰ 0.903 (from C₅H₉CH₂Cl and trimethylene oxide the yield was only 5%). (4-Bromobutyl)cyclopentane (90% from II with HBr-H₂SO₄), b₁₇ 110-11°, n_D²⁰ 1.4820, d₄²⁰ 1.187, gives with Na₂SO₃ after 8 h. at 160° in a rotating autoclave Na 4-cyclopentylbutanesulfonate. V (10% from C₅H₉(CH₂)₄Br and IV), b. 120-5°; Na 7-cyclopentylheptanesulfonate, strongly hygroscopic. Menthyl bromide (80% from menthol and HBr-H₂SO₄), b₁₃ 105.5°, d₄²⁰ 1.162, n_D²⁰ 1.4852. III (20%), b₁₀ 132-6°; chloride (35%), b₁₀ 120-5°; Na 2-menthylethanesulfonate. VII (84.5%), b₁₀ 96.5°, [α]_D 8.6°; chloride, b₉ 84°, d₄^21.5 0.949, n_D¹⁷ 1.4702. VIII (46%), b₁₀ 165-6°; Et ester, b₁₀ 146-8°. IX (5% from the Grignard compound of fencholyl chloride with ethylene oxide, or 76% by reduction of the Et ester of VIII with Na in absolute alc.), b₁₀ 134-5°, n_D¹⁸ 1.4761; chloride (65%), b₁₀ 120-6°.

Berichte der Deutschen Chemischen Gesellschaft [Abteilung] B: Abhandlungen published new progress about 18928-94-4. 18928-94-4 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic cyclic hydrocarbon, name is (2-Bromoethyl)cyclopentane, and the molecular formula is C7H13Br, Product Details of C7H13Br.

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

Fang, Jason published the artcileBiocatalytic Asymmetric Construction of Secondary and Tertiary Fluorides from β-Fluoro-α-Ketoacids, Recommanded Product: Ethylbromofluoroacetate, the publication is Angewandte Chemie, International Edition (2022), 61(21), e202201602, database is CAplus and MEDLINE.

Fluorine is a critical element for the design of bioactive compounds, driving advances in selective and sustainable fluorination. However, stereogenic tertiary fluorides pose a synthetic challenge and are thus present in only a few approved drugs (fluticasone, solithromycin, and sofosbuvir). The aldol reaction of fluorinated donors provides an atom-economical approach to asym. C-F motifs via C-C bond formation. Authors report that the type II pyruvate aldolase HpcH and engineered variants perform addition of β-fluoro-α-ketoacids (including fluoropyruvate, β-fluoro-α-ketobutyrate, and β-fluoro-α-ketovalerate) to diverse aldehydes. The reactivity of HpcH towards these fluoro-donors grants access to enantiopure secondary or tertiary fluorides. In addition to representing the first synthesis of tertiary fluorides via biocatalytic carboligation, the afforded products could improve the diversity of fluorinated building blocks and enable the synthesis of fluorinated drug analogs.

Angewandte Chemie, International Edition 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, Recommanded Product: Ethylbromofluoroacetate.

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

Francavilla, Charles published the artcileNovel N-chloroheterocyclic antimicrobials, Name: Sodium 3-bromopropane-1-sulfonate, the publication is Bioorganic & Medicinal Chemistry Letters (2011), 21(10), 3029-3033, database is CAplus and MEDLINE.

Antimicrobial compounds with broad-spectrum activity and minimal potential for antibiotic resistance are urgently needed. Toward this end, a novel series of N-chloroheterocycles were prepared Of the compounds examined, the N-chloroamine series were found superior over N-chloroamide series in regards to exhibiting high antimicrobial activity, low cytotoxicity, and long-term aqueous stability.

Bioorganic & Medicinal Chemistry Letters 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, Name: Sodium 3-bromopropane-1-sulfonate.

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

Wang, Hsing-Ju published the artcileNovel polythiophene derivatives functionalized with conjugated side-chain pendants comprising triphenylamine/carbazole moieties for photovoltaic cell applications, COA of Formula: C12H19BrS, the publication is Polymer Chemistry (2013), 4(3), 506-519, database is CAplus.

We synthesized a series of polythiophenes (PTs) featuring 2-ethylhexyl-substituted terthiophene (T) or quaterthiophene (BT) as the conjugated unit in the polymer backbone with pendant conjugated tert-butyl-substituted triphenylamine (tTPA)- or carbazole (tCz)-containing moieties as side chains, namely PTtTPA, PBTtTPA, PTtCz and PBTtCz. Incorporating T and BT moieties into the polymer backbone and attaching tTPA or tCz units promoted efficient conjugation within the extended conjugated frameworks of the polymers, resulting in lower band-gap energies and red-shifting of the maximal UV-Vis absorption wavelength. The higher electron-donating ability of tTPA resulted in broader absorption bands and lower band-gap energies of PTtTPA and PBTtTPA as compared with PTtCz and PBTtCz. Incorporation of the T and BT moieties into the polymer backbone enhanced the compatibility of PT and the fullerene derivative by reducing the side-chain d. of PT, thus providing sufficient free volume for efficient incorporation of [6,6]phenyl-C₆₁-butyric acid Me ester (PC₆₁BM) into the polymer chains. Polymer solar cells (PSCs) were fabricated by spin-coating a blend of each PT with the fullerene derivative (PC₆₁BM) as a composite film-type photoactive layer; PBTtTPA/PC₆₁BM-based PSCs showed superior photovoltaic (PV) performance to PTtTPA/PC₆₁BM-based PSCs in terms of conjugation and absorption band broadness. However, PBTtCz/PC₆₁BM-based PSCs showed inferior PV performance to PTtCz/PC₆₁BM-based PSCs. The lower HOMO level led to a higher open-circuit voltage (V_oc; 0.74 V) and larger photo-energy conversion efficiency (η; 2.77%) of PTtCz/PC₆₁BM-based PSCs.

Polymer Chemistry 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 C8H5F3N4, COA of Formula: C12H19BrS.

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

Matsuzawa, Tsubasa published the artcileSynthesis of diverse phenothiazines by direct thioamination of arynes with S-(o-bromoaryl)-S-methylsulfilimines and subsequent intramolecular Buchwald-Hartwig amination, Recommanded Product: 2-Bromo-5-methoxybenzene boronic acid, the publication is Chemistry Letters (2018), 47(7), 825-828, database is CAplus.

A facile method for the synthesis of diverse phenothiazines was achieved by direct thioamination of aryne intermediates with S-(o-bromoaryl)-S-methylsulfilimines and subsequent intramol. Buchwald-Hartwig amination. Since various sulfilimines were prepared easily by odorless copper-catalyzed ipso-thiolation of readily available o-bromoarylboronic acids followed by imination and hydrolysis, this approach enabled the synthesis of a wide variety of multisubstituted phenothiazines.

Chemistry Letters 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

Matsuzawa, Tsubasa published the artcileSynthesis of Diverse o-Arylthio-Substituted Diaryl Ethers by Direct Oxythiolation of Arynes with Diaryl Sulfoxides Involving Migratory O-Arylation, Category: bromides-buliding-blocks, the publication is Organic Letters (2017), 19(20), 5521-5524, database is CAplus and MEDLINE.

A diverse range of o-arylthio-substituted diaryl ethers has been synthesized by direct oxythiolation of arynes with diaryl sulfoxides that involves the formation of the C-O and C-S bonds followed by migratory O-arylation.

Organic Letters 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, Category: bromides-buliding-blocks.

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

Arai, Ryota published the artcileReversible photoinduced change in molecular ordering of diarylethene derivatives at a solution-HOPG interface, SDS of cas: 111865-47-5, the publication is Journal of the American Chemical Society (2008), 130(29), 9371-9379, database is CAplus and MEDLINE.

A diarylethene-pyrene diad and a diarylethene-pyrene-diarylethene triad were synthesized to investigate the photoinduced two-dimensional ordering change at a solution-HOPG interface. The mol. arrangements were detected by STM. The different photochromic isomers showed different orderings reflecting the differences in their mol. structures. For the diarylethene-pyrene-diarylethene triad, a new ordering appeared upon irradiation with UV light and returned to the original ordering upon subsequent irradiation with visible light. The new arrangement was assigned to the ordering of the closed-closed isomers based on the images of the isolated open- and closed-isomers. The relationship between the nature of the two-dimensional ordering and the mol. structure is discussed.

Journal of the American Chemical Society 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, SDS of cas: 111865-47-5.

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

Okamoto, Tsuyoshi published the artcileOxidation using quaternary ammonium polyhalides. V. Selective oxidation of benzyl alcohols by the use of benzyltrimethylammonium tribromide, Quality Control of 111865-47-5, the publication is Bulletin of the Chemical Society of Japan (1989), 62(11), 3748-9, database is CAplus.

The reaction of several substituted benzyl alcs. with 1 equiv of PhCH₂N⁺Me₂ Br^– in carbon tetrachloride under basic or neutral conditions gave the corresponding benzaldehydes. With 2 equiv of PhCH₂N⁺Me₃ Br^– in aqueous alk. solution and subsequent acid hydrolysis, the corresponding benzoic acids were obtained in satisfactory yields.

Bulletin of the Chemical Society of Japan 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, Quality Control of 111865-47-5.

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