Month: November 2022

Liu, Lilian Kao published the artcileReaction of aromatic and unsaturated compounds with the potassium permanganate/HCl (HBr) acetonitrile reagent, Computed Properties of 594-81-0, the publication is Journal of the Chinese Chemical Society (Taipei) (1996), 43(1), 61-6, database is CAplus.

Addition of hydrochloric or hydrobromic acid to a solution of potassium permanganate in acetonitrile produced a homogeneous mixture, which is suitable for laboratory chlorination or bromination, resp. Aromatic compounds more reactive than alkylbenzenes can be chlorinated or brominated without addnl. catalyst. Alkenes and alkynes give the corresponding vicinal dihaloalkanes and vinyl halides. All reactions complete within two hours under mild condition (25-60°) with excellent to moderate yields.

Journal of the Chinese Chemical Society (Taipei) 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

Chen, Hung-Yang published the artcilePolymer side-chain substituents elucidate thermochromism of benzodithiophene-dithiophenylacrylonitrile copolymers – polymer solubility correlation of thermochromism and photovoltaic performance, Recommanded Product: 2-Bromo-3-(2-ethylhexyl)thiophene, the publication is Polymer Chemistry (2017), 8(24), 3689-3701, database is CAplus.

Nine pBCNx polymers based on a donor-π-acceptor benzo[1,2-b:4,5-b’]dithiophene-(E)-2,3-di(thiophen-2-yl)acrylonitrile main-chain structure and n-octyl/2-ethylhexyl as the side-chain substituents have been designed and synthesized. The thermochromism of the pBCNx polymers has been carefully examined in both solution and the thin-film state. With addnl. evidences from Raman spectroscopy and AFM microscopy, we have deciphered the varied colors of nine pBCNx polymers in solution and the pronounced thin-film thermochromism only observed for certain pBCNx polymers, i.e., pBCN4, pBCN5, pBCN6, and pBCN8. The alkyl side-chain, and hence the solubility or aggregation of pBCNx polymers, is a main factor of the varied color in solution and the varied thermochromism in the thin film. We have identified that a stronger main-chain and main-chain interaction are present on the (E)-2,3-di(thiophen-2-yl)acrylonitrile moiety, whereas the poor to moderate solubility pBCN3, pBCN5′ and pBCN7 exhibit pronounced thermochromism in solution, and pBCN4, pBCN5, pBCN6 and pBCN8 are four polymers which have good solubility in solution and show thermochromism in the thin-film state. We took navy blue pBCN3 (poor solubility), magenta pBCN4 (good solubility), and reddish purple pBCN5′ (moderate solubility) for the fabrication of bulk heterojunction organic photovoltaics (OPVs). With a solvent annealing treatment, the power conversion efficiency of the OPVs has been improved significantly from 4.7% to 6.2% for the good solubility pBCN4, but there is little and no improvement for the moderate solubility pBCN5′ and poor solubility pBCN3, resp. Our study verifies that the good OPV performance of the pBCNx polymers can be correlated to the pronounced thin-film thermochromism. A good solubility of the polymer is a common characteristic of a material with significant thin-film thermochromism and good OPV performance.

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 C12H19BrS, Recommanded Product: 2-Bromo-3-(2-ethylhexyl)thiophene.

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

Beniazza, Redouane published the artcileFree-Radical Carbo-Alkenylation of Olefins: Scope, Limitations and Mechanistic Insights, Quality Control of 401-55-8, the publication is Chemistry – A European Journal (2017), 23(10), 2439-2447, database is CAplus and MEDLINE.

The three-component free-radical carbo-alkenylation of electron-rich olefins has been studied, varying the substitution pattern in the alkene, in the radical precursor and in the final acceptor. New vinylsulfones were also prepared and their reactivity investigated. The scope and limitations of the process was established, and the reaction mechanism clarified using selected dienes as radical clocks. It was thus recognized that the reversible addition onto the olefin of the released sulfonyl group is an important event, which should not be overlooked when using such multicomponent carbo-alkenylation reactions.

Chemistry – A European Journal 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, Quality Control of 401-55-8.

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

Li, Zeqing published the artcileMicrowave-assisted, Ir-catalyzed aromatic C-H borylation, Category: bromides-buliding-blocks, the publication is Research on Chemical Intermediates (2013), 39(4), 1917-1926, database is CAplus.

One-step conversions of 1,3-disubstituted benzenes to aryl boronates and 2,6-disubstituted pyridines to heteroaryl boronates are described. Microwave heating was used for all reactions. [(COD)Ir(μ-OMe)]₂ and 4,4′-di-tert-butyl-2,2′-bipyridine were used as catalysts, in Me tert-Bu ether. Acceleration of the rate of reaction was remarkable compared with that of same reaction under conventional heating conditions.

Research on Chemical Intermediates published new progress about 401797-04-4. 401797-04-4 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronate Esters,Boronic acid and ester, name is 2-(3-Bromo-5-methoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C13H18BBrO3, Category: bromides-buliding-blocks.

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

Li, Minglei published the artcileSynthesis and fungicidal activities of (E)-α-oxocyclododecanone oxime ethers, COA of Formula: C7H5Br2F, the publication is Nongyaoxue Xuebao (2006), 8(3), 209-213, database is CAplus.

A series of (E)-α-oxocyclododecanone oxime ethers were synthesized by etherification of corresponding hydroxylimines in yields of 59%-92%. The (E)-configuration was confirmed by single X-ray diffraction anal. of a representative compound Bioassay results showed that most of the synthesized compounds present good fungicidal activities against Rhizoctonia solani, Cladosporium cucumerinum, Colletotrichum orbiculare, Botrytis cinerea, Fusarium oxysporum, and Phomopsis asparagi. For example, the EC₅₀ values of I against mentioned-above six fungi were 13, 9, 12, 19, 14, 3 mg/L, resp.

Nongyaoxue Xuebao 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, COA of Formula: C7H5Br2F.

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

Li, Ya-Syuan published the artcileCerium(III) triflate-catalyzed cycloaddition reaction in aqueous conditions to substituted naphthotriazolediones, Product Details of C12H25Br, the publication is Journal of the Chinese Chemical Society (Weinheim, Germany) (2022), 69(5), 849-855, database is CAplus.

In this study, the cerium(III) trifluoromethanesulfonate-catalyzed cycloaddition of 1,4-naphthoquinone with functionalized azides in aqueous solutions was used to synthesize naphtho[2,3-d][1,2,3]triazole-4,9-dione derivatives Moreover, this method boasts scalability and completes the synthesis of two key biol. compounds This method’s advantages are environmentally friendly reaction conditions, easy applicability in large-scale operations, broad structurally diverse products produced in high yields and the recyclability of catalysts.

Journal of the Chinese Chemical Society (Weinheim, Germany) 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

Li, Songyi published the artcileTransition Metal Free Stannylation of Alkyl Halides: The Rapid Synthesis of Alkyltrimethylstannanes, Safety of 1-Bromododecane, the publication is Journal of Organic Chemistry (2022), 87(6), 4291-4297, database is CAplus and MEDLINE.

A transition metal free stannylation reaction of alkyl bromides and iodides with hexamethyldistannane was developed. This protocol is operationally convenient and features a rapid reaction and good functional group tolerance. A wide range of functionalized primary and secondary alkyl and benzyl tri-Me stannanes were prepared in moderate to excellent yields. The success of the gram-scale procedure and tandem Stille coupling reaction has allowed this protocol to demonstrate potential for application in organic synthesis. Both exptl. and theor. studies reveal the mechanistic details of this stannylation reaction.

Journal of Organic Chemistry 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, Safety of 1-Bromododecane.

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

Li, Songyi published the artcileTransition Metal Free Stannylation of Alkyl Halides: The Rapid Synthesis of Alkyltrimethylstannanes, Formula: C8H17Br, the publication is Journal of Organic Chemistry (2022), 87(6), 4291-4297, database is CAplus and MEDLINE.

A transition metal free stannylation reaction of alkyl bromides and iodides with hexamethyldistannane was developed. This protocol is operationally convenient and features a rapid reaction and good functional group tolerance. A wide range of functionalized primary and secondary alkyl and benzyl tri-Me stannanes were prepared in moderate to excellent yields. The success of the gram-scale procedure and tandem Stille coupling reaction has allowed this protocol to demonstrate potential for application in organic synthesis. Both exptl. and theor. studies reveal the mechanistic details of this stannylation reaction.

Journal of Organic 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, Formula: C8H17Br.

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

Liang, Hua published the artcileOrtho-hydroxyl-oriented tandem-responsive diacylhydrazones with super sensitivity for Al³⁺ and subsequent potential recognition of Cu²⁺, SDS of cas: 1207448-58-5, the publication is Sensors and Actuators, B: Chemical (2018), 62-69, database is CAplus.

Structure is a crucial factor to decide the selectivity and sensitivity of chemosensors. In this work, a diacylhydrazone 2a and its congeneric derivatives 2b-2d were synthesized and their applications for Al³⁺ detection were investigated. Except 2d, all the other compounds exhibit notable turn-on fluorescence toward Al³⁺ over 15 other metal ions and the sensitivities of 2b and 2c are even higher after modification, illustrating ortho-OH indispensability in their structures for sensing. Reversibility investigation shows that the sensors all have regeneration ability. Meanwhile, the sensor-Al³⁺ systems show selective fluorescence turn-off for Cu²⁺, providing a potential platform for tandem recognition of Al³⁺ and Cu²⁺. 2a as a standard, shows a 1:2 molar ratio to Al³⁺ confirmed by Job′s plot, ¹H NMR spectra and mass spectra, and its detection limit for Al³⁺ is 7.63 nM in ethanol. It has relevant sensitivity over pH 3-9, with the highest sensitivity at around pH 4. Apart from Al³⁺ detection, anion selectivity was also explored and it shows that 2a, 2b and 2c all have selectivity toward CN^– evidenced by UV-vis spectra.

Sensors and Actuators, B: Chemical published new progress about 1207448-58-5. 1207448-58-5 belongs to bromides-buliding-blocks, auxiliary class Bromide,Benzene,Phenol,Ether,Aldehyde, name is 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde, and the molecular formula is C13H17BrO3, SDS of cas: 1207448-58-5.

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

Zhao, Binlin published the artcileAn Olefinic 1,2-Boryl-Migration Enabled by Radical Addition: Construction of gem-Bis(boryl)alkanes, Recommanded Product: Ethylbromofluoroacetate, the publication is Angewandte Chemie, International Edition (2019), 58(28), 9448-9452, database is CAplus and MEDLINE.

A series of in situ formed alkenyl diboronate complexes from alkenyl Grignard reagents (com. available or prepared from alkenyl bromides and Mg) with B₂Pin₂ (bis(pinacolato)diboron) react with diverse alkyl halides by a Ru photocatalyst to give various gem-bis(boryl)alkanes. Alkyl radicals add efficiently to the alkenyl diboronate complexes, and the adduct radical anions undergo radical-polar crossover, specifically, a 1,2-boryl-anion shift from boron to the α-carbon sp² center. This transformation shows good functional-group compatibility and can serve as a powerful synthetic tool for late-stage functionalization in complex compounds Measurements of the quantum yield reveal that a radical-chain mechanism is operative in which the alkenyl diboronates acts as reductive quencher for the excited state of the photocatalyst.

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 C11H22N2O4, Recommanded Product: Ethylbromofluoroacetate.

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