Month: November 2022

Cheminet, Nathalie published the artcileElaboration of low-band-gap π-conjugated systems based on thieno[3,4-b]pyrazines, Formula: C4Br2N2O4S, the publication is Pure and Applied Chemistry (2020), 92(2), 335-353, database is CAplus.

In order to understand the electronic contribution of the thienopyrazine building block on the electronic properties of π-conjugated systems, small mols. containing thiophene and thienopyrazine moieties are synthesized and jointly studied by theor. (DFT) and exptl. methods (UV-Vis, UPS). Taking advantages of these preliminar attractive results, four low band gap extended structures have been elaborated on the base of Donor-Acceptor-Donor sequences (DAD); these elongated π-conjugated mols. exhibit noticeable electronic and absorption properties spreading from the near UV to NIR regions.

Pure and Applied 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, Formula: C4Br2N2O4S.

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

Akitake, Masahiro published the artcileAccess to γ-Carbolines: Synthesis of Isocryptolepine, Quality Control of 89694-44-0, the publication is Journal of Organic Chemistry (2021), 86(24), 17727-17737, database is CAplus and MEDLINE.

A new method to synthesize γ-carboline derivatives has been developed starting from 3,5-dibromo-4-pyridinamine by monoarylation using the Suzuki-Miyaura cross-coupling reaction followed by the base-mediated ring closure to pyrrole formation. Synthesis of a series of γ-carboline derivations from the 4-brominated γ-carboline 4a has been achieved by employing various coupling reactions and N-alkylations. This method has been applied for the synthesis of the antimalarial and anticancer natural product isocryptolepine. The photophys. properties of novel γ-carboline derivations are also reported.

Journal of Organic Chemistry 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, Quality Control of 89694-44-0.

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

Zhang, Ying-peng published the artcileA chalcone organic gel for oil spill recovery and wastewater treatment, Formula: C12H25Br, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2022), 128166, database is CAplus.

Oil spillage and water pollution are serious environmental disasters, which have a serious impact on the economy and ecosystem. To protect the environment,we have synthesized a new type of chalcone derivative (G1) gel. G1 can form gels in many organic solvents, fuels and edible oils. The FT-IR, SEM and XRD studies show that there are π-π stacking, Van der Waals and intermol. H-bonding force in the G1 gel self-assembly process. 3D networks structure provides a strong basis for the adsorption of dyes and the adsorption efficiency could be as high as 97.2%. The G1 can selectively gel in organic water pollutants, with recyclability. Even in the presence of salt, acid and alkali, it can be successfully used to recover spilled oil from oil-water mixture

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 C10H11N3O3S, Formula: C12H25Br.

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

Matsumura, Yoshihiro published the artcileStereoselective homocoupling of phenylacetic acid derivatives utilizing electrochemically generated base, Quality Control of 594-81-0, the publication is Electrochimica Acta (1997), 42(13-14), 2233-2239, database is CAplus.

Electrochem. generated base (EGB) was cathodically prepared from pyrrolidone, and it was used as an efficient base to generate an anion of Me phenylacetate. The anion was oxidized by iodine to afford di-Me 2,3-diphenylsuccinate in high yield and high dl selectivity. Optically active 2,3-diphenylsuccinic acid derivatives was prepared by this EGB/iodine method. The oxidative homocoupling of Me phenylacetate was also achieved with a catalytic amount of iodine by using an electrochem. mediator system.

Electrochimica Acta 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, Quality Control of 594-81-0.

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

Akkuratov, Alexander V. published the artcileDesign of novel thiazolothiazole-containing conjugated polymers for organic solar cells and modules, Application In Synthesis of 303734-52-3, the publication is Solar Energy (2020), 605-611, database is CAplus.

One of the major challenges in the field of organic photovoltaics is associated with high-throughput manufacturing of efficient and stable organic solar cells. Practical realization of technologies for production of large-area organic solar cells requires the development of novel materials with a defined combination of properties ensuring sufficient reliability and scalability of the process in addition to good efficiency and operation stability of the devices. In this work, we designed two novel polymers comprising thiazolothiazole units and investigated their performance as absorber materials for organic solar cells and modules. Optimized small-area solar cells based on P1/[70]PCBM ([6,6]-phenyl-C71-butyric acid Me ester) blends exhibited promising power conversion efficiency (PCE) of 7.5%, while larger area modules fabricated using slot die coating showed encouraging PCE of 4.2%. Addnl., the fabricated devices showed promising outdoor stability maintaining 60-70% of the initial efficiency after 20 sun days being exposed to natural sunlight at the Negev desert. The obtained results feature the designed polymer P1 as a promising absorber material for a large-scale production of organic solar cells under ambient conditions.

Solar Energy 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, Application In Synthesis of 303734-52-3.

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

Li, Yan published the artcileCobalt-catalysed enantioselective C(sp³)-C(sp³) coupling, COA of Formula: C4H10Br2CoO2, the publication is Nature Catalysis (2021), 4(10), 901-911, database is CAplus.

Enantioselective C(sp³)-C(sp³) coupling substantially impacts organic synthesis but remains challenging. Cobalt has played an important role in the development of homogeneous organometallic catalysis, but there are few examples of its use in asym. cross-coupling. Here, a cobalt-catalyzed enantioselective C(sp³)-C(sp³) coupling reaction, namely, alkene hydroalkylation, to access chiral fluoroalkanes was reported. This reaction represents a catalyst-controlled enantioselective coupling mode in which a tailor-made auxiliary is unnecessary; via this reaction, an aliphatic C-F stereogenic center can be introduced at the desired position in an alkyl chain.

Nature Catalysis published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, COA of Formula: C4H10Br2CoO2.

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

Qi, Ji published the artcilePanchromatic small molecules for UV-Vis-NIR photodetectors with high detectivity, HPLC of Formula: 52431-30-8, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2014), 2(13), 2431-2438, database is CAplus.

Two donor-acceptor-donor (D-A-D) type low-bandgap small mols., M1 and M2, with bis(2-thienyl)-N-alkylpyrrole (TPT) as the donor and thieno[3,4-b]thiadiazole (TT) as the acceptor were designed and synthesized. The absorption, transmission, electrochem., thermal and film properties were studied. The compounds showed panchromatic absorption in the spectral range of 300-1000 nm. They exhibited semi-transparent property in the visible region (400-700 nm). Small mol. photodetectors (SMPDs) based on M1 and M2 were fabricated and studied. For the SMPD with BCP as the hole blocking layer (HBL), a detectivity of 5.0 × 10¹¹ Jones at 800 nm at -0.1 V was obtained, which is among the highest detectivities reported for NIR SMPDs. With a sufficiently thin Ag electrode, visibly transparent PDs with an average transmittance of 45% in the visible region were obtained for the 1st time. The transparent PDs exhibited fairly constant and high detectivity of (1-10) × 10¹¹ Jones over λ = 300-900 nm. Side chains of the compounds exhibited a great influence on the device performance, which could be assigned to their film absorption coefficient, mol. packing and active layer morphol.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices 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, HPLC of Formula: 52431-30-8.

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

Sheng, Jie published the artcileCombinatorial Nickel-Catalyzed Monofluoroalkylation of Aryl Boronic Acids with Unactivated Fluoroalkyl Iodides, Related Products of bromides-buliding-blocks, the publication is Organic Letters (2017), 19(17), 4480-4483, database is CAplus and MEDLINE.

Using combinations of Ni(OTf)₂ and nitrogen (2,2-bipyridine, 4,4′-di-tert-butyl-2,2′-bipyridine, or 1,10-phenanthroline) and phosphine ligands [Ph₃P, Cy₃P, (4-MeOC₆H₄)₃P, or X-Phos] determined combinatorially, arylboronic acids underwent chemoselective fluoroalkylation with α-fluoro alkyl iodides mediated by K₂CO₃ in 1,4-dioxane at 80° to yield fluoroalkyl arenes such as PhCHFCH₂Ph in 66-99% yields.

Organic 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 C28H41N2P, Related Products of bromides-buliding-blocks.

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

Nguyen, Quyen published the artcileIron(II) bromide-catalyzed intramolecular C-H bond amination [1,2]-shift tandem reactions of aryl azides, Product Details of C9H8BrNO4, the publication is Journal of the American Chemical Society (2013), 135(2), 620-623, database is CAplus and MEDLINE.

Iron(II) bromide catalyzes the transformation of ortho-substituted aryl azides into 2,3-disubstituted indoles through a tandem ethereal C-H bond amination [1,2]-shift reaction. The preference for the 1,2-shift component of the tandem reaction was established to be Me < 1° < 2° < Ph.

Journal of the American Chemical Society published new progress about 189748-25-2. 189748-25-2 belongs to bromides-buliding-blocks, auxiliary class Bromide,Nitro Compound,Benzene,Ester, name is Methyl 2-(5-bromo-2-nitrophenyl)acetate, and the molecular formula is C9H8BrNO4, Product Details of C9H8BrNO4.

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

Negishi, Eiichi published the artcileCyclization reactions of ω-tosyloxy-1-alkynyl- and ω-tosyloxy-1-alkenylborates and their ω-halo analogs, Name: (4-Bromobut-1-yn-1-yl)trimethylsilane, the publication is Heteroatom Chemistry (1992), 3(3), 293-302, database is CAplus.

The reaction of trialkylboranes with ω-tosyloxy-1-lithio-1-alkynes can induce transfer of an alkyl group from the boron atom to the alkynyl carbon atom with concomitant formation of four- through six-membered carbocycles via intramol. displacement of the ω-tosyloxy group. Thus, reacting LiCCCH₂CMe₂(CH₂)₃OSO₂C₆H₄Me-4 with tricyclopentylborane gave a mixture of (E)- and (Z)-cyclopentylmethylene-3,3-dimethylcyclohexane. The stereoselectivity of the reaction, however, is low (anti/syn≃1.6-1.7). The corresponding reaction of ω-halo- or ω-tosyloxy-1-alkenylborates also gives exocyclic alkenes via 1,2-migration-cyclization followed by dehydroboration. In the cases of cyclopropanation, cyclopropylcarbinyl-to-homopropargyl rearrangement rather than dehydroboration takes place. Diphenylzirconocene reacts similarly with 6-lithio-5-hexynyl tosylate to give phenylmethylenecyclopentane in 45% yield. On the other hand, attempts to induce a similar migration with Ph derivatives of Y, V, Cr, and Mn have led to < 5-10% yields of the same cyclization product.

Heteroatom 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 C7H13BrSi, Name: (4-Bromobut-1-yn-1-yl)trimethylsilane.

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