Tag: M.W=150-200

Yuan, Chunchen published the artcileRuthenium(II)-Catalyzed C-H Difluoromethylation of Ketoximes: Tuning the Regioselectivity from the meta to the para Position, Synthetic Route of 401-55-8, the publication is Angewandte Chemie, International Edition (2018), 57(5), 1277-1281, database is CAplus and MEDLINE.

A highly para-selective C_Ar-H difluoromethylation of ketoxime ethers under ruthenium catalysis was developed. A wide variety of ketoxime ethers are compatible with the reaction, which leads to the corresponding para-difluoromethylated products in moderate to good yield. A mechanistic study clearly showed that chelation-assisted cycloruthenation is the key factor in the para selectivity of the difluoromethylation of ketoxime ethers. D. functional theory was used to gain a theor. understanding of the para selectivity.#.

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 C11H8F2, Synthetic Route of 401-55-8.

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

Li, Chengwen published the artcileSynthesis of difluoroalkylated 2-azaspiro[4.5]decane derivatives via copper-catalyzed difluoroalkylation/dearomatization of N-benzylacrylamides, Related Products of bromides-buliding-blocks, the publication is Organic & Biomolecular Chemistry (2020), 18(41), 8376-8380, database is CAplus and MEDLINE.

An efficient method for the synthesis of difluoroalkylated 2-azaspiro[4.5]decanes I [R¹ = H, 7-OMe, 7-F, etc.; R² = iPr, tBu, adamantan-1-yl; R³ = H, Me; R⁴ = EtO₂C, Et₂NCO, 1-pyrrolidinylcarbonyl, 1-piperidinylcarbonyl, 2,3-dihydro-1-indolylcarbonyl] via copper-catalyzed difluoroalkylation of N-benzylacrylamides with halo- fluoroacetate/difluoroacetate was established. The reaction experienced a tandem radical addition and dearomatizing cyclization process. In addition, the resultant products could be smoothly converted into a difluoroalkylated quinolinone and saturated spirocyclohexanone scaffold.

Organic & Biomolecular 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, Related Products of bromides-buliding-blocks.

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

Yuan, Xiyue published the artcileAchieving 16% Efficiency for Polythiophene Organic Solar Cells with a Cyano-Substituted Polythiophene, Computed Properties of 111-83-1, the publication is Advanced Functional Materials (2022), 32(24), 2201142, database is CAplus.

Polythiophenes (PTs) are promising electron donors in organic solar cells (OSCs) due to their simple structures and excellent synthetic scalability. However, the device performance of PT-based OSCs is rather poor due mainly to large photon energy losses and an unfavorable active layer morphol. Herein, the authors report a new PT, which is abbreviated as P5TCN-2F and features cyano-group substituents for high-efficiency OSCs. The cyano-group endows P5TCN-2F with a deep-lying HOMO energy level, which thereby contributed to high open-circuit voltage in OSCs as a result of reduced non-radiative recombination energy loss. Moreover, the cyano-group leads to strong interchain interaction, improved polymer crystallinity, and appropriate miscibility with the prevailing non-fullerene acceptors. Consequently, P5TCN-2F offers over 15% power conversion efficiency when blended with various Y-series non-fullerene acceptors (Y6, Y6-BO, eC9, and L8-BO). Particularly, a champion efficiency of 16.1% is obtained by the P5TCN-2F:Y6 blend, which is largely higher than that of any previous PT-based OSCs. Moreover, the average figure of merit of the active layer based on P5TCN-2F is much superior to that of benzodithiophene-based polymers. These results suggest the renaissance of PT-based OSCs and have opened an avenue to access high-performance materials for the large-scale production of OSC modules.

Advanced Functional Materials 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 C8H6BrClO, Computed Properties of 111-83-1.

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

Li, Lixin published the artcileSynthesis of remote fluoroalkylated alkenes by a palladium-catalyzed relay Heck-type reaction, SDS of cas: 401-55-8, the publication is Chemical Communications (Cambridge, United Kingdom) (2020), 56(65), 9384-9387, database is CAplus and MEDLINE.

Palladium-catalyzed relay Heck-type reaction of fluoroalkyl bromide and terminal alkenes was reported. The reaction involved fluoroalkylation of alkenes and migration of double bonds via a 1,5-hydrogen atom transfer strategy. Through this method, a series of remote fluoroalkylated alkenes was obtained under mild conditions.

Chemical Communications (Cambridge, United Kingdom) 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, SDS of cas: 401-55-8.

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

He, Yang published the artcileImidazolium Gemini ionic liquids for regulating facilely the swelling and dispersion of montmorillonite in water, Category: bromides-buliding-blocks, the publication is Applied Clay Science (2022), 106457, database is CAplus.

The imidazolium Gemini ionic liquids (IL), with alkyl groups ranging from Bu to tetradecyl as tail chains and polyoxyethylene group as linker chain, were synthesized and used as novel efficient modifiers for flexibly controlling the swelling and dispersion of Na-montmorillonite (Na-Mt). The correlation between swelling behavior and structure of imidazolium Gemini IL was investigated. Too long or too short tail chains caused greater swelling, obtaining smaller particle size and reductive face-to-face stacking degree of layers. Based on the change of water contact angles, the increased stability of modified Mt in water indicated that the hydrophobicity of the tail chains played an important role in impeding the entry of water mols. into the interlayer. Zeta potential, Fourier transform IR spectra and XPS validated the cation exchange between imidazolium Gemini IL and Na⁺, and confirmed the adsorption site. The mol. arrangement and intercalation were determined through adsorption behavior, interlayer space of Mt and simulation of mol. size. The imidazolium Gemini IL covered the Mt layers in monolayer, finally taking lateral (short tail chains) or paraffin (long tail chains) arrangement. The investigation will provide useful guidance for modifying Mt to obtain desirable properties and broadening the practical application of Mt hybrids.

Applied Clay 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, Category: bromides-buliding-blocks.

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

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

Ruan, Zhixiong published the artcileRuthenium(II)-Catalyzed meta C-H Mono- and Difluoromethylations by Phosphine/Carboxylate Cooperation, Recommanded Product: Ethylbromofluoroacetate, the publication is Angewandte Chemie, International Edition (2017), 56(8), 2045-2049, database is CAplus and MEDLINE.

Ruthenium(II)-catalyzed meta-selective C-H (di)fluoromethylation was accomplished by phosphine and carboxylate cooperation. The remote C-H functionalization was characterized by ample substrate scope, thereby setting the stage for meta-(di)fluoromethylation through facile C-H cleavage. Thus, 2-phenylpyridine reacted withBrCF₂CO₂Et in the presence of ruthenium catalyst I and phosphine P(C₆H₄CF₃-4)₃ to give pyridinyldifluoroacetate II in 71% yield.

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

Sha, Wanxing published the artcilePhotoredox-Catalyzed Cascade Difluoroalkylation and Intramolecular Cyclization for Construction of Fluorinated γ-Butyrolactones, Product Details of C4H6BrFO2, the publication is Journal of Organic Chemistry (2017), 82(18), 9824-9831, database is CAplus and MEDLINE.

A cascade visible-light photocatalytic difluoroalkylation and intramol. cyclization reaction was developed for the synthesis of difluoroalkylated oxygen heterocycles. The reaction was carried out under mild conditions, affording fluorinated isobenzofuran-1-ones, lactone, and cyclic ethers with up to 97% chem. yields. Furthermore, several types of bromofluoroalkane precursors bearing ester, keto, amido, and phosphate groups could all work well in this reaction, which provides an easy method for the preparation of functionalized difluoroalkylated oxygen heterocycles.

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 C9H6N2O2, Product Details of C4H6BrFO2.

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

Fang, Di published the artcileRadical C(sp³)-H Heck-type Reaction of N-Alkoxybenzimidoyl Chlorides with Styrenes to Construct Alkenols, Synthetic Route of 111-83-1, the publication is Organic Letters (2022), 24(10), 2050-2054, database is CAplus and MEDLINE.

The first radical C(sp³)-H Heck-type reaction of aliphatic alcs. for selective δ- and ε-alkenol I [R = H, Ph, 4-FC₆H₄, etc.; R¹ = Me, n-Bu, Bn, etc.; R² = H, Me; R¹R² = cyclohexyl, cyclopentyl, 2,3-dihydro-1H-inden-2-yl; Ar = Ph, 4-MeC₆H₄, 4-FC₆H₄, etc.; X = CH₂, O] and II [Ar¹ = Ph, 4-CNC₆H₄, 4-MeOC₆H₄, etc.] synthesis by photoredox catalysis. N-Alkoxybenzimidoyl chlorides were developed as novel alkoxyl radical precursors with tunable redox potentials. Various alkenols could be constructed by the inert C(sp³)-H Heck-type reaction of 4-cyano-N-alkoxybenzimidoyl chlorides with styrene derivatives under redox-neutral conditions, which could be performed on the gram scale and can be easily derivatized.

Organic Letters 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, Synthetic Route of 111-83-1.

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