Author: Jessica.F

Karsten, Bram P. published the artcileElectronic structure of small band gap oligomers based on cyclopentadithiophenes and acceptor units, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Journal of Materials Chemistry (2009), 19(30), 5343-5350, database is CAplus.

A combined exptl. and theor. study was carried out on a series of well-defined small band gap oligomers. The cyclopentadithiophene oligomers were prepared by Suzuki coupling of thiopheneboronic esters and dibromophenylquinoxaline compounds These oligomers comprise two terminal electron-rich cyclopentadithiophene units connected to six different electron deficient aromatic rings that allow tuning the optical band gap from 1.4 to 2.0 eV. The optical absorption of the ground state, triplet excited state, and radical cation was studied. The optical band gap correlates with the electrochem. oxidation and reduction potential and is further supported by quantum-chem. calculations at the d. functional theory (DFT) level. The optical absorption of the radical cations shows only little variations among the different oligomers, suggesting that the charge is mainly localized on the donor moieties. Triplet energy levels are generally low (<1.2 eV) and the singlet-triplet splitting remains significant when going to smaller band gaps.

Journal of Materials Chemistry 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, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene.

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

Zhang, Song-Lin published the artcileIsolation and characterization of copper(III) trifluoromethyl complexes and reactivity studies of aerobic trifluoromethylation of arylboronic acids, Recommanded Product: Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), the publication is RSC Advances (2016), 6(75), 70902-70906, database is CAplus.

The isolation, characterization and reactivity of transition metal trifluoromethyl complexes are fundamental and challenging topics in trifluoromethylation chem. The authors report herein the synthesis and isolation of two [(phen)Cu^I(PPh₃)₂]⁺[Cu^III(CF₃)₄]^– (2, phen = 1,10-phenanthroline) and (phen)Cu^III(CF₃)₃ (3) as well as known complex (bpy)Cu^III(CF₃)₃ (4, bpy = 2,2-bipyridine) at room temperature 2 And 3 were fully characterized using ¹H, ¹⁹F, ³¹P NMR, elemental analyses and x-ray crystallog. Reactivity studies indicate that 2 is unreactive toward arylboronic acids. In contrast, 3 and 4 react with various aryl and heteroaryl boronic acids to deliver trifluoromethylated arenes in good to quant. yields under mild conditions. The presence of a fluoride additive in DMF under aerobic conditions is crucial to these reactions. This study provides fundamental information about the structure and reactivity of elusive Cu(III) trifluoromethyl complexes that are proposed as relevant reactive intermediates in many trifluoromethylation reactions.

RSC Advances published new progress about 25753-84-8. 25753-84-8 belongs to bromides-buliding-blocks, auxiliary class Copper, name is Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), and the molecular formula is C6H5NO, Recommanded Product: Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I).

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

Wu, Shan published the artcileThe effective separation of yttrium and other heavy rare earth elements with salicylic acid derivatives, Formula: C8H17Br, the publication is Minerals Engineering (2022), 107396, database is CAplus.

In order to develop stable and efficient extractant to meet the needs of ion adsorbed rare earth ores for Y separation, two novel salicylic acid derivatives, i.e., o-octyloxybenzoic acid (OOBA) and o-ethylhexyloxybenzoic acid (EHOBA), are synthesized. OOBA is an oily liquid with single component at room temperature, which is suitable for solvent extraction and has the consistent properties. The extraction behavior of Y by OOBA is resembled to light rare earth elements (LREEs) than heavy rare earth elements (HREEs). Thus, OOBA has better selectivities for Y and other HREEs than common carboxylic acids, such as NA and sec-octyl phenoxyacetic acid (CA-12). By FT-IR and slope anal., it can be inferred that the extraction mechanism of OOBA is cation exchange, and the extracted complex can be expressed as REL₃. The effects of pH value, saponification degree, loading concentration, RE concentration and OOBA concentration on the extraction and separation of HREEs by OOBA are also discussed. OOBA has been provided with low stripping acid concentration, good cycle stability and less loss in the extraction process. The concentration of OOBA in the raffinate is only about 28 ppm. Finally, a process for separating Y from the industrial Y-enriched HREEs feed liquid is developed. Through the simulated fractional extraction including 9-stage extraction and 6-stage scrubbing, Y product with the purity of 99.4% and the yield of 96.4% is obtained.

Minerals 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 C8H8O3, Formula: C8H17Br.

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

Parker, A. J. published the artcileE2C mechanism in elimination reactions. II. Substituent effects on rates of elimination from acyclic systems, SDS of cas: 594-81-0, the publication is Journal of the American Chemical Society (1971), 93(19), 4735-49, database is CAplus.

The effects of alkyl, aryl, benzyl, bromine, and carbomethoxy substituents on rates of bimol.β-eliminations are reported. A spectrum of transition states, ranging from E2H-like to E2C-like, is utilized and the response of the various transition states to substituent effects is very different. The E2C-like transition state is very product-like. E2C-like reactions give high yields of the most stable isomer (e.g., Saytzeff or trans-olefin) provided that the requirement of anti geometry of β-hydrogen and leaving group is not violated. Tetrabutylammonium acetate in acetone is an excellent base system for promoting fast clean β-elimination from secondary or tertiary acyclic systems.

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

Hussain, Nazar published the artcileSynthesis of Sugar-Based Enones and Their Transformation into 3,5-Disubstituted Furans and 2-Acyl-Substituted 1,2,3-Trideoxy Sugars in the Presence of Lewis Acids, Recommanded Product: 2-Bromo-5-methoxybenzene boronic acid, the publication is Organic Letters (2019), 21(9), 3034-3037, database is CAplus and MEDLINE.

Pd-catalyzed carbonylative cross-coupling reactions of 2-iodoglycals have been developed for the synthesis of sugar-based arylones and ynones using formic acid as the carbonyl source. Whereas acetyl-protected arylones lead to the formation of highly substituted furan derivatives in the presence of Lewis acid, benzyl-protected arylones furnished the 3-deoxy sugar derivative In the presence of nucleophiles, an attack took place on the C-1 or C-3 carbon regio- and stereoselectively depending on the nature of the nucleophiles.

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, Recommanded Product: 2-Bromo-5-methoxybenzene boronic acid.

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

Adane, Legesse published the artcileDesign and synthesis of guanylthiourea derivatives as potential inhibitors of Plasmodium falciparum dihydrofolate reductase enzyme, Application In Synthesis of 76283-09-5, the publication is Bioorganic & Medicinal Chemistry Letters (2014), 24(2), 613-617, database is CAplus and MEDLINE.

A new class of compounds, e.g. I [R = 3,4-(MeO)₂C₆H₃; 3-PhC₆H₄, 4-CF₃C₆H₄, etc.], based on S-benzylated guanylthiourea has been designed as potential Plasmodium falciparum dihydrofolate reductase inhibitors using computer aided methods (mol. electrostatic potential, mol. docking). Several compounds in this class have been synthesized starting from guanylthiourea and alkyl bromides. In vitro studies showed that two compounds from this class are active with the IC₅₀ value of 100 μM and 400 nM.

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, Application In Synthesis of 76283-09-5.

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

Mitrofanov, A. Yu. published the artcileCu(I) complexes with diethoxyphosphoryl-1,10-phenanthrolines in catalysis of C-C and C-heteroatom bonds formation, Safety of Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), the publication is Inorganica Chimica Acta (2015), 297-301, database is CAplus.

Diethoxyphosphoryl substituted 1,10-phenanthroline Cu(I) complexes were tested as catalysts in the Sonogashira-type reaction, α-arylation of phosphoryl-stabilized C-H acids, C-N, C-P bond forming reactions (substitution reactions) and in the reaction of phenylacetylene and bis(pinacolato)diboron (addition reaction). The complexes demonstrate fairly high catalytic activity and in some cases their efficiency is superior to that of the parent Cu(phen)(PPh₃)Br (phen = phenanthroline).

Inorganica Chimica Acta published new progress about 25753-84-8. 25753-84-8 belongs to bromides-buliding-blocks, auxiliary class Copper, name is Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), and the molecular formula is C30H24BrCuN2P, Safety of Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I).

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

Huck, L. published the artcileReformatsky and Blaise reactions in flow as a tool for drug discovery: one pot diversity oriented synthesis of valuable intermediates and heterocycles, Recommanded Product: Ethylbromofluoroacetate, the publication is Green Chemistry (2017), 19(6), 1420-1424, database is CAplus.

The application of Reformatskii and Blaise reactions for the preparation of a diverse set of valuable intermediates and heterocycles, e.g., I in a one-pot protocol was described. To achieve this goal, a greener activation protocol for zinc in flow conditions was developed to introduce this metal efficiently into α-bromoacetates. The organozinc compounds were added to a diverse set of ketones and nitriles to obtain a wide range of functional groups and heterocyclic systems.

Green Chemistry 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

Storch, Jan published the artcileIntramolecular cascade hydroarylation/cycloisomerization strategy for the synthesis of polycyclic aromatic and heteroaromatic systems, Safety of (4-Bromobut-1-yn-1-yl)trimethylsilane, the publication is European Journal of Organic Chemistry (2013), 2013(2), 260-263, database is CAplus.

A new PtCl₂/PtCl₄-catalyzed hydroarylation/cycloisomerization cascade reaction leading to the formation of two aromatic or heteroaromatic rings in one step is reported. The strategy developed is exemplified by the synthesis of the 5,6-dihydrobenzo[c]phenanthrene and 6H-naphtho[2,1-c]chromene skeletons. Attempts to prepare [8]helicene-like mols. are also discussed.

European Journal of Organic Chemistry published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C15H14O3, Safety of (4-Bromobut-1-yn-1-yl)trimethylsilane.

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

Woods, Eliot F. published the artcilePhotocontrolled Synthesis of n-Type Conjugated Polymers, Category: bromides-buliding-blocks, the publication is Angewandte Chemie, International Edition (2020), 59(15), 6062-6067, database is CAplus and MEDLINE.

Current approaches to synthesize π-conjugated polymers (CPs) are dominated by thermally driven, transition-metal-mediated reactions. Herein we show that electron-deficient Grignard monomers readily polymerize under visible-light irradiation at room temperature in the absence of a catalyst. The product distribution can be tuned by the wavelength of irradiation based on the absorption of the polymer. Conversion studies are consistent with an uncontrolled chain-growth process; correspondingly, chain extension produces all-conjugated n-type block copolymers. Preliminary results demonstrate that the polymerization can be expanded to donor-acceptor alternating copolymers. We anticipate that this method can serve as a platform to access new architectures of n-type CPs without the need for transition-metal catalysis.

Angewandte Chemie, International Edition 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 C8H6ClN, Category: bromides-buliding-blocks.

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