Author: Jessica.F

Wang, Guanghui published the artcileDouble N,B-Type Bidentate Boryl Ligands Enabling a Highly Active Iridium Catalyst for C-H Borylation, SDS of cas: 401797-04-4, the publication is Journal of the American Chemical Society (2015), 137(25), 8058-8061, database is CAplus and MEDLINE.

Boryl ligands hold promise in catalysis due to their very high electron-donating property. In this communication double N,B-type boryl anions were designed as bidentate ligands to promote an sp² C-H borylation reaction. A sym. pyridine-containing tetraaminodiborane(4) compound was readily prepared as the ligand precursor that could be used, in combination with [Ir(OMe)(COD)]₂, to in situ generate a highly active catalyst for a broad range of (hetero)arene substrates including highly electron-rich and/or sterically hindered ones. This work provides the 1st example of a bidentate boryl ligand in supporting homogeneous organometallic catalysis.

Journal of the American Chemical Society 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 C8H11BO2, SDS of cas: 401797-04-4.

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

Wang, Guanghui published the artcileDouble N,B-Type Bidentate Boryl Ligands Enabling a Highly Active Iridium Catalyst for C-H Borylation, Synthetic Route of 1075719-78-6, the publication is Journal of the American Chemical Society (2015), 137(25), 8058-8061, database is CAplus and MEDLINE.

Boryl ligands hold promise in catalysis due to their very high electron-donating property. In this communication double N,B-type boryl anions were designed as bidentate ligands to promote an sp² C-H borylation reaction. A sym. pyridine-containing tetraaminodiborane(4) compound was readily prepared as the ligand precursor that could be used, in combination with [Ir(OMe)(COD)]₂, to in situ generate a highly active catalyst for a broad range of (hetero)arene substrates including highly electron-rich and/or sterically hindered ones. This work provides the 1st example of a bidentate boryl ligand in supporting homogeneous organometallic catalysis.

Journal of the American Chemical Society published new progress about 1075719-78-6. 1075719-78-6 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Boronate Esters,Boronic Acids,Boronic acid and ester, name is 2-(3,4-Dibromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C3H12Cl2N2, Synthetic Route of 1075719-78-6.

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

Jin, Qiong-Hua published the artcileBromo(1,10-phenanthroline-N,N’)(triphenylphosphine)copper(I), Category: bromides-buliding-blocks, the publication is Acta Crystallographica, Section C: Crystal Structure Communications (1999), C55(9), i, database is CAplus.

Crystals of the title compound are triclinic, space group P1̅, with a 8.409(4), b 9.327(4), c 18.144(7) Å, α 78.555(14), β 76.85(2), γ 70.50(2)°; Z = 2, d_c = 1.503; R = 0.037, R_w(F²) = 0.086 for 6237 reflections. The coordination polyhedron with Cu as the center atom is a distorted tetrahedron, with two N atoms of phenanthroline, one Br atom and one P atom of PPh₃ occupying the four corners.

Acta Crystallographica, Section C: Crystal Structure Communications 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, Category: bromides-buliding-blocks.

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

Zhou, Jinjun published the artcileTuning Energy Levels of Low Bandgap Semi-Random Two Acceptor Copolymers, Application of 2,5-Dibromo-3,4-dinitrothiophene, the publication is Macromolecules (Washington, DC, United States) (2013), 46(9), 3391-3394, database is CAplus.

A series of low bandgap semi-random copolymers incorporating various ratios of two acceptor units – thienothiadiazole and benzothiadiazole – were synthesized by Pd-catalyzed Stille coupling. The polymer films exhibited broad and intense absorption spectra, covering the spectral range from 350 nm up to 1240 nm. The optical bandgaps and HOMO levels of the polymers were calculated from UV-visible spectroscopy and cyclic voltammetry measurements, resp. By changing the ratio of the two acceptor monomers, the HOMO levels of the polymers were tuned from -4.42 to -5.28 eV and the optical bandgaps were varied from 1.00 to 1.14 eV. The results indicate our approach could be applied to the design and preparation of conjugated polymers with specifically desired energy levels and bandgaps for photovoltaic applications.

Macromolecules (Washington, DC, United States) 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 C11H16BNO3S, Application of 2,5-Dibromo-3,4-dinitrothiophene.

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

Chen, Lin X. published the artcileDynamics of Photoinduced Electron Transfer in a Molecular Donor-Acceptor Quartet, Synthetic Route of 303734-52-3, the publication is Journal of Physical Chemistry B (2006), 110(24), 11730-11738, database is CAplus and MEDLINE.

The electronic structures and dynamics of photoinduced charge separation and recombination in a new donor/acceptor quartet mol. with bis-oligothiophene (BOTH) and bis-perylenediimide (BPDI) blocks attached to a benzene ring were described. Detailed transient spectroscopic studies were carried out on this compound and reference compounds at isolated mol. levels in solution Two different dynamics of charge separation and recombination associated with two types of donor/acceptor pair conformations in solution were observed These results were discussed based on Marcus theory and ascribed to both through-bond and through-space electron-transfer processes associated with two different orientations of the acceptors relative to the donor group. This mol. system exhibits a more efficient charge separation than charge recombination processes in both polar and nonpolar organic solvents, indicating that the material is an interesting candidate for photovoltaic studies in solid state.

Journal of Physical Chemistry B 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, Synthetic Route of 303734-52-3.

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

Zhao, Tian-Yuan published the artcileNickel-Catalyzed Desymmetric Reductive Cyclization/Coupling of 1,6-Dienes: An Enantioselective Approach to Chiral Tertiary Alcohol, Synthetic Route of 111-83-1, the publication is Angewandte Chemie, International Edition (2022), 61(11), e202115702, database is CAplus and MEDLINE.

Authors have developed a nickel-catalyzed desym. reductive cyclization/coupling of 1,6-dienes. The reaction provides an efficient method for constructing a chiral tertiary alc. and a quaternary stereocenter by a single operation. The method has excellent diastereoselectivity and high enantioselectivity, a broad substrate scope, as well as good tolerance of functional groups. Preliminary mechanism studies show that alkyl nickel(I) species are involved in the reaction.

Angewandte Chemie, International Edition 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 C24H20Ge, Synthetic Route of 111-83-1.

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

Tian, Ping-ping published the artcileNucleophilic fluoroalkylation of terminal vinyl triflones with SO₂CF₃ as a removable activating group, Recommanded Product: Ethylbromofluoroacetate, the publication is Tetrahedron Letters (2019), 60(15), 1015-1018, database is CAplus.

Terminal vinyl triflones served as excellent Michael addition acceptors which readily reacted with difluoromethylene phosphabetaine and di- or mono-fluoroalkyl bromides to afford compounds containing CF₂ or CF groups. This fluoroalkylation was characterized by mild reaction conditions, ready availability of reagents and excellent functional-group tolerance.

Tetrahedron Letters 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 C14H14, Recommanded Product: Ethylbromofluoroacetate.

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

Chen, Xin published the artcileSynthesis of PEGylated Salicylaldehyde Azine via Metal-free Click Chemistry for Cellular Imaging Applications, Category: bromides-buliding-blocks, the publication is Chemical Research in Chinese Universities (2019), 35(5), 929-936, database is CAplus.

In this work, two kinds of PEGylated salicylaldehyde azine(SA) polymers were prepared and investigated for cellular imaging applications. First, a diazido derivative of SA was synthesized and subsequently PEGylated with polyethylene glycol monomethyl ether(mPEG) by metal-free azide-alkyne 1,3-dipolar cycloaddition reaction. The formed triazole group in mPEG-SA was then converted into cationic triazolium group by N-alkylation reaction. Both the synthesized polymers, mPEG-SA and N-alkylated mPEG-SA, showed good dispersibility in water, but differences in self-assembly of nanostructures. The mPEG-SA with triazole groups self-assembled into micelles, while the N-alkylated mPEG-SA with triazolium groups self-assembled into vesicles. Furthermore, mPEG-SA and N-alkylated mPEG-SA nanoparticles showed bright fluorescence due to the aggregation of AIE-active SA mols. in the nano-particles and could be successfully used as fluorescent nanoprobes for bioimaging applications in HeLa cancer cells. Finally, both the synthesized polymers showed minimal cytotoxicity and low hemolytic activity. Therefore, these PEGylated SA polymers proved to be promising bioimaging nanoprobes or traceable drug delivery vehicles.

Chemical Research in Chinese Universities 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, Category: bromides-buliding-blocks.

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

Chen, W. published the artcileSynthesis and antifungal evaluation of 1,2,4-triazolo[1,5-α]pyrimidine bearing 1,2,4-triazole heterocycle derivatives, Computed Properties of 76283-09-5, the publication is Asian Journal of Chemistry (2011), 23(2), 602-608, database is CAplus.

Preparation of 28 new 1,2,4-triazolo[1,5-α]pyrimidine derivatives bearing 1,2,4-triazole heterocycle is reported. Structures were characterized by ¹H NMR spectroscopy, mass spectrometry and elemental analyses. With triadimefon, validamycin and carbendazim as pos. controls, the antifungal activities of 28 compounds against Fusarium oxysporum f. sp. vasinfectum, Gibberella sanbinetti, Cercospora beticola Sacc., Physaclospora piricola and Rhizoctonia solani were evaluated. Compound 2-[(5-(2,6-difluorobenzylthio)-4-phenyl-4H-1,2,4-triazol-3-yl)methylthio]-5,7-dimethyl[1,2,4]triazolo[1,5-α]pyrimidine (I) showed potent antifungal activities against G. sanbinetti, C. beticola, P. piricola and R. solani. On the basis of the biol. results, structure activity relationships of these compounds were also discussed.

Asian Journal of Chemistry 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, Computed Properties of 76283-09-5.

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

Ma, Hao published the artcileEmulsifying stability and viscosity reduction for heavy crude oil in surfactant-polymer composite system, HPLC of Formula: 143-15-7, the publication is Journal of Molecular Liquids (2022), 119713, database is CAplus.

Heavy crude oil is one of the most precious and complex mol. mixtures available, with considerable economic relevance. Nevertheless, its high viscosity and complicated chem. compositions pose an exceptional challenge for viscosity reduction with a compound emulsification system in heavy oil exploitation. Here, two types of polymers were synthesized and compounded with surfactant SDS to reduce the heavy crude oil viscosity. Their emulsifying properties in demineralized water and mineralized water were measured to evaluate their differences from macroscopic views. Furthermore, the corresponding emulsion system (involving resins, asphaltenes, surfactants, polymers, etc.) was also simulated and computed using mol. dynamics simulation to investigate the relationships of various compositions on emulsifying properties at the mol. scale. The results showed that the surfactant-polymer composite system formed by the amphiphilic polymer had an obvious advantage in emulsifying stability with the water segregation rate of 60.6% after 48 h in the simulated salinity and the viscosity reduction rate reached more than 92.1% after optimization. Besides, the electrostatic interaction is the major part of the potential energy in emulsion systems at a ratio of 87.8%. The divalent cations (Ca²⁺ and Mg²⁺) resulted in the shrinkage or collapse of mol. conformation of the water-soluble polymer by 19%. The variation of interaction energy in salt solutions for different emulsifying systems caused a series of exptl. and simulated distinctions, such as solution viscosity, interface behaviors, the number of hydrogen bonds, and the spatial distribution function, which ultimately determined the emulsifying properties of heavy crude oil. Notably, this work offers insight into the interactions and influences of complex mixtures in oil-water systems. It also facilitates to design and apply the innovative functional chem. additives in heavy crude oil extraction and transportation.

Journal of Molecular Liquids 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, HPLC of Formula: 143-15-7.

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