Month: December 2022

Yuan, Chunchen published the artcileRuthenium(II)-enabled para-selective C-H difluoromethylation of anilides and their derivatives, HPLC of Formula: 401-55-8, the publication is Nature Communications (2018), 9(1), 1-10, database is CAplus and MEDLINE.

Here the development of a ruthenium-enabled para-selective C-H difluoromethylation of anilides, indolines, and tetrahydroquinolines is described. This reaction tolerates various substituted arenes, affording para-difluoromethylation products in moderate to good yields. Results of a preliminary study of the mechanism indicate that chelation-assisted cycloruthenation might play a role in the selective activation of para-CAr-H bonds. Furthermore, this method provides a direct approach for the synthesis of fluorinated drug derivatives, which has important application for drug discovery and development.

Nature Communications 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 C11H8F2, HPLC of Formula: 401-55-8.

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

Liu, Yantao published the artcileMerging Gold/Copper Catalysis and Copper/Photoredox Catalysis: An Approach to Alkyl Oxazoles from N-Propargylamides, COA of Formula: C4H6BrFO2, the publication is Journal of Organic Chemistry (2021), 86(24), 18247-18256, database is CAplus and MEDLINE.

Here, a mild and highly efficient approach to alkyl oxazoles I [R = Ph, 4-MeC₆H₄, 3-MeC₆H₄, etc.; R¹ = C₄F₉, C₆F₁₃, CCl₃, etc.] through merging gold/copper catalysis and copper/photoredox catalyzed reaction of N-propargylamides with alkyl halides was reported. Various alkyl oxazoles were synthesized in good to excellent yields with wide functional-group compatibility under blue-light irradiation Significantly, a copper catalyst played a dual role in this transformation: as a powerful cocatalyst to accelerate protodeauration of vinyl gold intermediates and improve photoredox catalysis.

Journal of Organic 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, COA of Formula: C4H6BrFO2.

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

Zhou, Lu published the artcileNi-catalyzed migratory fluoro-alkenylation of unactivated alkyl bromides with gem-difluoroalkenes, HPLC of Formula: 1997-80-4, the publication is Chemical Science (2019), 10(4), 1144-1149, database is CAplus and MEDLINE.

Nickel-catalyzed highly regio- and stereoselective migratory fluoro-alkenylation of unactivated alkyl bromides was reported. Catalytic cycle merged alkyl nickel chain-walking and defluorinative coupling enabled the introduction of a broad array of fluoroalkenyl moieties into carbon chains. Control experiments with other halogenated alkenes demonstrated the essential role of fluorine atoms in this reaction. The reaction proceeded under mild conditions and allowed for the synthesis of a variety of valuable monofluoroalkenes.

Chemical Science published new progress about 1997-80-4. 1997-80-4 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,Benzene, name is 1-(2-Bromoethyl)-3-(trifluoromethyl)benzene, and the molecular formula is C8H5F3O3, HPLC of Formula: 1997-80-4.

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

Chen, Xin published the artcileAcetic Acid Derivatives of 3,4-Dihydro-2H-1,2,4-benzothiadiazine 1,1-Dioxide as a Novel Class of Potent Aldose Reductase Inhibitors, Recommanded Product: 4-Bromo-1-(bromomethyl)-2-fluorobenzene, the publication is Journal of Medicinal Chemistry (2010), 53(23), 8330-8344, database is CAplus and MEDLINE.

A series of novel benzothiadiazine 1,1-dioxide derivatives were synthesized and tested for their inhibitory activity against aldose reductase. Of these derivatives, 17 compounds, having a substituted N2-benzyl group and a N4-acetic acid group on the benzothiadiazine, were found to be potent and selective aldose reductase inhibitors in vitro with IC₅₀ values ranging from 0.032 to 0.975 μM. I (R¹=Cl, R²=2,4,5-F₃) proved to be the most active in vitro. The eight top-scoring compounds coming from the in vitro test for ALR2 inhibition activity were then tested in vivo, whereby three derivatives, I (R¹=F, R²=2,4,5-F₃; R¹=Cl, R²=2-F,4-Br; R¹=Cl, R²=2,4,5-F₃) demonstrated a significantly preventive effect on sorbitol accumulation in the sciatic nerve in the 5-day streptozotocin-induced diabetic rats in vivo. Structure-activity relationship and mol. docking studies highlighted the importance of substitution features of N4-acetic acid group and halogen-substituted N2-benzyl group in the benzothiadiazine scaffold and indicated that substitution with halogen at C-7 had a remarkably strong effect on ALR2 inhibition potency.

Journal of Medicinal 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, Recommanded Product: 4-Bromo-1-(bromomethyl)-2-fluorobenzene.

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

Cai, Tian-Qi published the artcileLow bandgap polymers synthesized by FeCl₃ oxidative polymerization, Category: bromides-buliding-blocks, the publication is Solar Energy Materials & Solar Cells (2010), 94(7), 1275-1281, database is CAplus.

Four low bandgap polymers, combining an alkyl thiophene donor with benzo[c][1,2,5]thiadiazole, 2,3-diphenylquinoxaline, 2,3-diphenylthieno[3,4-b]pyrazine and 6,7-diphenyl-[1,2,5]thiadiazolo[3,4-g]quinoxaline acceptors in a donor-acceptor-donor architecture, were synthesized via FeCl₃ oxidative polymerization The mol. weights of the polymers were improved by introducing o-dichlorobenzene (ODCB) as the reaction solvent instead of the commonly used solvent, chloroform. The photophys., electrochem. and photovoltaic properties of the resulting polymers were investigated and compared. The optical bandgaps of the polymers vary between 1.0 and 1.9 eV, which is promising for solar cells. The devices spin-coated from an ODCB solution of P1DB:[70]PCBM showed a power conversion efficiency of 1.08% with an open-circuit voltage of 0.91 V and a short-circuit c.d. of 3.36 mA cm^-2 under irradiation from an AM1.5G solar simulator (100 mW cm^-2).

Solar Energy Materials & Solar Cells 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, Category: bromides-buliding-blocks.

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

Liu, Shunjie published the artcileMolecular Motion in Aggregates: Manipulating TICT for Boosting Photothermal Theranostics, HPLC of Formula: 303734-52-3, the publication is Journal of the American Chemical Society (2019), 141(13), 5359-5368, database is CAplus and MEDLINE.

Planar donor and acceptor (D-A) conjugated structures are generally believed to be the standard for architecting highly efficient photothermal theranostic agents, in order to restrict intramol. motions in aggregates (nanoparticles). However, other channels of extra nonradiative decay may be blocked. Now this challenge is addressed by proposing an “abnormal” strategy based on mol. motion in aggregates. Mol. rotors and bulky alkyl chains are grafted to the central D-A core to lower intermol. interaction. The enhanced mol. motion favors the formation of a dark twisted intramol. charge transfer state, whose nonradiative decay enhances the photothermal properties. Result shows that small-mol. NIRb14 with long alkyl chains branched at the second carbon exhibits enhanced photothermal properties compared with NIRb6, with short branched chains, and much higher than NIR6, with short linear chains, and the com. gold nanorods. Both in vitro and in vivo experiments demonstrate that NIRb14 nanoparticles can be used as nanoagents for photoacoustic imaging-guided photothermal therapy. Moreover, charge reversal poly(β-amino ester) makes NIRb14 specifically accumulate at tumor sites. This study thus provides an excited mol. motion approach toward efficient phototheranostic agents.

Journal of the American Chemical Society 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, HPLC of Formula: 303734-52-3.

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

Liu, Canqun published the artcileStudy on preparation and field induction mechanism of organic silicon composites based on aligned carbon nanotubes, Computed Properties of 111-83-1, the publication is Polymer Engineering & Science (2022), 62(8), 2610-2621, database is CAplus.

High thermal conductivity materials are an urgent need for high power, microelectronic components and equipment, but are limited by low thermal conductivity of the traditional silicone materials. 4-Cyano-4′-n-octyl biphenyl (8OCB) was synthesized to modify carbon nanotubes, and silicone was used as the matrix. In the curing process of the composite, an elec. field was applied and the liquid crystal induced the orientation of carbon nanotubes in the direction of 8OCB liquid crystal. The morphol., structure and properties of modified carbon nanotubes and composites were characterized by Fourier transform IR spectroscopy, polarized microscopy, transmission electron microscopy, thermal conductivity, and so on. The 8OCB liquid crystal can improve the dispersion of carbon nanotubes in silicone composites. When the mass fraction of multiwalled carbon nanotubes (MWCNTs) was 11 wt%, the thermal conductivity of 8OCB-MWCNTs/silicone composite after elec. field was 2.39 W/(m K), which is 6.4 times that of MWCNTs/silicone composite after elec. field and 15.5 times that of pure silicone matrix. A method to obtain highly ordered filled thermal conductive materials by applying an elec. field to induce the orientation of carbon nanotubes is demonstrated.

Polymer Engineering & Science 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, Computed Properties of 111-83-1.

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

Qi, Ji published the artcileOptimization of Solubility, Film Morphology and Photodetector Performance by Molecular Side-Chain Engineering of Low-Bandgap Thienothiadiazole-Based Polymers, HPLC of Formula: 52431-30-8, the publication is Advanced Functional Materials (2014), 24(48), 7605-7612, database is CAplus.

A series of donor-acceptor (D-A) type low-bandgap polymers containing the terthiophene and thieno[3,4-b]thiadiazole units in the main chain but different numbers of identical side chains are designed and synthesized in order to study the effect of side chain on the polymer properties and optimize the performance of polymer photodetectors. Variation in the side chain content can influence the polymer solubility, mol. packing, and film morphol., which in turn affects the photodetector performance, particularly with regard to the photoresponsivity and dark current. X-ray diffraction patterns indicate that mol. ordering increases with more side chains. Atomic force microscopy shows that appropriate morphol. of the active layer in the polymer photodetector is necessary for high photocurrent and low dark current. Using BCP as a hole blocking layer (10 nm), the photodetector based on P4 exhibits the optimized performance with specific detectivity of 1.4 × 10¹² Jones at 800 nm, which is among the best reported values for polymer photodetectors and even comparable to that of a silicon photodetector.

Advanced Functional Materials 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

Sun, Ze-Ying published the artcileTetrahydroxydiboron-Promoted Radical Addition of Alkynols, COA of Formula: C4H6BrFO2, the publication is Organic Letters (2020), 22(15), 6214-6219, database is CAplus and MEDLINE.

Tetrahydroxydiboron has previously been used as a borylation or reducing reagent in organic synthesis. Herein, we present a novel tetrahydroxydiboron-promoted radical addition of internal alkynes followed by intramol. oxidation of alc. through 1,5-hydrogen atom transfer. Preliminary mechanistic studies showed that the process might be initiated through N,N-dimethylformamide-assisted homolytic cleavage of tetrahydroxydiboron. This process provides a convenient synthesis of fluoroalkyl-substituted alkenes with a pendant aldehyde or ketone moiety.

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 C6H10F3NO, COA of Formula: C4H6BrFO2.

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

Yuan, Hua published the artcileAntioxidant and Antibacterial Activities of Dodecyl Tannin Derivative Linked with 1,2,3-Triazole, Formula: C12H25Br, the publication is Chemistry & Biodiversity (2022), 19(1), e202100558, database is CAplus and MEDLINE.

Dodecyl tannin derivative linked with 1,2,3-triazole was prepared by the click reaction of dodecyl azide and alkynylated tannin. The structure of tannin derivative was identified by FT-IR spectrometer and elemental analyzer, and the surface activity, antioxidant activity and antimicrobial activity of tannin derivative were studied. The surface tension of tannin derivative was significantly reduced because of the introduction of long chain alkyl groups, and the lowest surface tension was 38.87 mN/m at 1.0 mg/mL. The tannin derivative had strong ability to scavenge 1,1-diphenyl-2-picrylhydrazyl radical, the scavenging rate could reach 89.08% at 0.25 mg/mL. The tannin derivative exhibited strong antibacterial activity against E. coli and S. aureus due to the increased fat-solubility of tannin derivative and the introduction of antibacterial triazole groups in mol. structure of tannin derivative, and the bacteriostatic ratios of tannin derivative against E. coli and S. aureus were 92.16% and 89.21% at 2.0 mg/mL, resp. The tannin derivative can be used as good candidates for antibacterial packaging or antioxidant supplements.

Chemistry & Biodiversity 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 C12H9NO, Formula: C12H25Br.

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