Category: bromides-buliding-blocks

Bernd, Johannes published the artcileElectrochemical O-trifluoromethylation of electron-deficient phenols, Name: 4-Bromo-2,3,5,6-tetrafluorophenol, the publication is Electrochemistry Communications (2021), 107165, database is CAplus.

A simple and sustainable one-step strategy for the preparation of electron-deficient aryl trifluoromethyl ethers (ArOCF₃) from the corresponding phenols by electrochem. synthesis is presented. Anodic oxidation of trifluoromethane sulfinate (Langlois reagent) leads to direct O-trifluoromethylation of phenol-derivatives bearing fluorine, chlorine, bromine and nitrile substituents under mild conditions in yields up to 75% and in gram-scale. This electrochem. protocol provides an economic and green synthesis for an otherwise inaccessible class of mols. without the need for expensive or toxic reagents, oxidants or metal catalysts.

Electrochemistry Communications published new progress about 1998-61-4. 1998-61-4 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzene,Phenol, name is 4-Bromo-2,3,5,6-tetrafluorophenol, and the molecular formula is C6HBrF4O, Name: 4-Bromo-2,3,5,6-tetrafluorophenol.

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

Li, Zexian published the artcileRadical Addition Enables 1,2-Aryl Migration from a Vinyl-Substituted All-Carbon Quaternary Center, Recommanded Product: Ethylbromofluoroacetate, the publication is Angewandte Chemie, International Edition (2021), 60(1), 186-190, database is CAplus and MEDLINE.

An efficient method for photocatalytic perfluoroalkylation of vinyl-substituted all-carbon quaternary centers involving 1,2-aryl migration was developed. The rearrangement reactions use fac-Ir(ppy)₃, visible light and com. available fluoroalkyl halides and can generate valuable multisubstituted perfluoroalkylated compounds in a single step that would be challenging to prepare by other methods. Mechanistically, the photoinduced alkyl radical addition to an alkene leads to the migration of a vicinal aryl substituent from its adjacent all-carbon quaternary center with the concomitant generation of a C-radical bearing two electron-withdrawing groups that is further reduced by a hydrogen donor to complete the domino sequence.

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

Wu, Shaoxiang published the artcileA highly diastereoselective and enantioselective phase-transfer catalyzed epoxidation of β-trifluoromethyl-β,β-disubstituted enones with H₂O₂, Related Products of bromides-buliding-blocks, the publication is Iranian Journal of Chemistry & Chemical Engineering (2015), 34(4), 13-38, database is CAplus.

An efficient epoxidation of β-CF₃-β,β-disubstituted unsaturated ketones was developed with environmental benign hydrogen peroxide as the oxidant and F₅-substituted chiral quaternary ammonium salt derived from cinchona-alkaloid as the catalyst. Using 3 mol% of the catalyst, both enantiomers of (R,R) and (S,S) β-trifluoromethyl-α,β-epoxy ketones were obtained in excellent diastereoselectivities (up to 100:1 d.r.) and enantioselectivities (up to 99.7% ee). The effects of catalyst structure, catalyst loading, substrate structure, the nature of oxidant, and reaction conditions on the catalyst capacities were discussed in full length. The reaction mechanism was proposed to explain the origin of chiral induction. By subsequent reduction with zinc the epoxides were exhibited to be converted into trifluoromethylated quaternary alcs. without any loss in enantioselectivities. All new compounds were fully characterized by IR, NMR, elemental anal. and or high resolution mass spectrum.

Iranian Journal of Chemistry & Chemical Engineering 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 C10H10CoF6P, Related Products of bromides-buliding-blocks.

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

Yang, Peng published the artcileEnantioselective Dearomative [3 + 2] Umpolung Annulation of N-Heteroarenes with Alkynes, HPLC of Formula: 1450711-53-1, the publication is Journal of the American Chemical Society (2022), 144(3), 1087-1093, database is CAplus and MEDLINE.

Enantioselective [3 + 2] annulation of N-heteroarenes such as 2-(2-bromophenyl)quinoline with alkynes R¹CCR² [R¹ = Me, Ph, benzyloxymethyl, (thiophen-2-ylmethoxy)methyl, etc.; R² = Me, Ph, benzyloxymethyl, (thiophen-2-ylmethoxy)methyl, etc.] has been developed via a cobalt-catalyzed dearomative umpolung strategy in the presence of chiral ligand e.g., [(2R,3R)-3-(diphenylphosphanyl)butan-2-yl]diphenylphosphane and reducing reagent. A variety of electron-deficient N-heteroarenes e.g., 2-(2-bromophenyl)quinoline and internal or terminal alkynes are employed in this reaction, showing a broad substrate scope and good functionality tolerance. Annulation of electron-rich indoles I (R = H, 5-Cl) with alkynes is also developed. This protocol provides a straightforward access to a variety of N-spiroheterocyclic mols. such as II and in excellent enantioselectivities (76 examples, up to 99% ee).

Journal of the American Chemical Society published new progress about 1450711-53-1. 1450711-53-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Boronic Acids,Boronic Acids,Boronic acid and ester, name is (2-Bromo-5-methylphenyl)boronic acid, and the molecular formula is C8H15ClN2, HPLC of Formula: 1450711-53-1.

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

Yang, Peng published the artcileEnantioselective Dearomative [3 + 2] Umpolung Annulation of N-Heteroarenes with Alkynes, Category: bromides-buliding-blocks, the publication is Journal of the American Chemical Society (2022), 144(3), 1087-1093, database is CAplus and MEDLINE.

Enantioselective [3 + 2] annulation of N-heteroarenes such as 2-(2-bromophenyl)quinoline with alkynes R¹CCR² [R¹ = Me, Ph, benzyloxymethyl, (thiophen-2-ylmethoxy)methyl, etc.; R² = Me, Ph, benzyloxymethyl, (thiophen-2-ylmethoxy)methyl, etc.] has been developed via a cobalt-catalyzed dearomative umpolung strategy in the presence of chiral ligand e.g., [(2R,3R)-3-(diphenylphosphanyl)butan-2-yl]diphenylphosphane and reducing reagent. A variety of electron-deficient N-heteroarenes e.g., 2-(2-bromophenyl)quinoline and internal or terminal alkynes are employed in this reaction, showing a broad substrate scope and good functionality tolerance. Annulation of electron-rich indoles I (R = H, 5-Cl) with alkynes is also developed. This protocol provides a straightforward access to a variety of N-spiroheterocyclic mols. such as II and in excellent enantioselectivities (76 examples, up to 99% ee).

Journal of the American Chemical Society 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 C3H12Cl2N2, Category: bromides-buliding-blocks.

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

Luo, Min published the artcileSynthesis and Optical Properties of Soluble Near-Infrared Arylene Bisthienoimidazole Dyes, COA of Formula: C4Br2N2O4S, the publication is Organic Letters (2011), 13(15), 4092-4095, database is CAplus and MEDLINE.

Soluble, film-forming near-IR arylene bisthienoimidazole dyes with a band gap of 1.2-1.3 eV are electrochromic and absorb strongly at the telecommunication wavelengths (1310 and 1550 nm) in the oxidized state.

Organic Letters 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, COA of Formula: C4Br2N2O4S.

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

Fan, Guanglin published the artcileRubber-like composites with tunable thermal- and photo-responsive shape memory properties, Safety of 1-Bromododecane, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2022), 137534, database is CAplus.

Shape memory polymers (SMPs) are crosslinked networks with mol. switches to control network mobility and thus macroscopic deformation. The network crosslinking and the mol. switches make most SMPs behave like hard plastics, with very few exceptions whose extensibilities are comparable to rubbers and elastomers. Here we report a class of composites that comprise polystyrene-b-ethylene-co-butylene-b-styrene (SEBS) as elastic matrixes and azobenzene derivatives (ADs) as mol. switches. The incorporation of the ADs does not impair the extensibility of the SEBS substrates, and the tensile strains of the prepared composites can exceed 900% even when the content of the ADs reaches 30 wt%. The thermal- and photo-responsive solid-liquid transitions of the ADs are responsible for the shape memory effects of the composites. The photo-responsive shape recovery process can be completed within 2 s, and 2D-to-3D shape transformations are realized on the samples fixed with tensile strains by spatiotemporal control of UV irradiation On another aspect, the chem. structures of the ADs can be tailored to regulate their m.ps. and thus the thermal responsive shape memory properties of the composites. Furthermore, different pieces of composites can be combined by hot-pressing to exhibit spatially tailorable thermal responsive shape recovery behaviors. The facile preparation and interesting shape memory properties of the rubber-like composites can inspire the design of soft SMPs with more promising applications.

Chemical Engineering Journal (Amsterdam, Netherlands) 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

Han, Lin published the artcileMulti-hydroxyl containing organo-vermiculites for enhanced adsorption of coexisting methyl blue and Pb(II) and their adsorption mechanisms, Related Products of bromides-buliding-blocks, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2022), 129542, database is CAplus.

To address the competitive adsorption of complex wastewater components on organo-vermiculites (organo-Vts), multi-hydroxy containing gemini surfactants varying in alkyl chain length (G₁₂, G₁₄ and G₁₆) are designed and applied for modifying Na-vermiculite (Na-Vt) targeted to the removal of co-existing MB and Pb(II). Organo-Vts exhibit enhanced hydrophobicity and enlarged interlayer spacing compared with Na-Vt, with the saturated modifier dosage reaching as low as 0.4 CEC of Na-Vt. Shorter alkyl chain induces suitable packing d. and interlayer environment, endowing G₁₂-Vt the highest adsorption capacity towards MB/Pb(II) compared with G₁₄-Vt and G₁₆-Vt (178.3/63.0 mg/g compared with 143.7/38.1 and 88.6/36.6 mg/g, resp.). Freundlich isotherm and PSO kinetic model are agreeable (the values of R² are higher than 0.98) with the endothermic adsorption processes. Notably, a simultaneous effect in binary-component system is obtained, and the maximum adsorption capacities of G₁₂-Vt towards MB/Pb(II) reaching 349.9 and 124.5 mg/g, which are 1.96 and 1.95 times higher than single-component system, resp. Combination of theor. fitting and mol. simulation co-reveals the adsorption mechanism: the simultaneous effect is due to the providing of addnl. active sites by the adsorbed MB, which is stronger than that between Pb(II) and the modifier. Existence of π-ion interaction enhances the retention of Pb(II) for a further step. This work broadens a new research perspective for complex wastewater treatment and provides a deep understanding of the stimulative adsorption mechanism between dyes and metal ions.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects 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, Related Products of bromides-buliding-blocks.

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

Gao, Shouhai published the artcileBuilding fluorescent sensors for carbohydrates using template-directed polymerizations, Computed Properties of 166821-88-1, the publication is Bioorganic Chemistry (2001), 29(5), 308-320, database is CAplus and MEDLINE.

The ability to custom-make fluorescent sensors for different analytes could have a tremendous impact in a variety of areas. Template-directed polymerization or mol. imprinting seems to be a promising approach for the preparation of high-affinity and specific binding sites for different template mols. However, the application of mol. imprinting in the preparation of fluorescent sensors has been hampered by the lack of suitable fluorescent tags, which would respond to the binding event with significant fluorescence intensity changes. We have designed and synthesized a fluorescent monomer (1) that allows for the preparation of fluorescent sensors of cis diols using mol. imprinting methods. This monomer has been used for the preparation of imprinted polymers as sensitive fluorescent sensors for d-fructose. The imprinted polymers prepared showed significant fluorescence intensity enhancement upon binding with the template carbohydrate. (c) 2001 Academic Press.

Bioorganic Chemistry published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C12H16BBrO2, Computed Properties of 166821-88-1.

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

Li, Gongchun published the artcileSynthesis and properties of a novel decacyclic S,N-heteroacene, Related Products of bromides-buliding-blocks, the publication is Acta Crystallographica, Section C: Structural Chemistry (2022), 78(4), 250-256, database is CAplus and MEDLINE.

In this work, the Cadogan ring-closure reaction between the benzene moiety of thieno[3,2-b]indole and 5,6-dinitrobenzo[c][1,2,5]thiadiazole was employed to prepare the novel decacyclic S,N-heteroacene 15,16-dibutyl-14,17-didodecyldithieno[2”,3”:2′,3′]indolo[6′,7′:4,5]pyrrolo[3,2-e:2′,3′-g][2,1,3]benzothiadiazole I, C₅₈H₇₆N₆S₃. The conjugated backbone of compound I was extended in comparison with its octacyclic analog as the central unit within Y6-type mol. acceptors, a family of overwhelming electron acceptors in polymer solar-cell research. The single-crystal X-ray diffraction (SC-XRD) characterization indicated the existence of π-π and C(sp²)-H···π interactions among TIP mols. The electrochem. and optical properties of compound I were also characterized. As a novel S,N-heteroacene building block, compound I was anticipated to be of potential use in the construction of promising electronic materials.

Acta Crystallographica, Section C: Structural 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, Related Products of bromides-buliding-blocks.

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