Month: November 2022

Arlow, Sophie I. published the artcileSynthesis, Characterization, and Reactivity of Palladium Fluoroenolate Complexes, Recommanded Product: Ethylbromofluoroacetate, the publication is Journal of the American Chemical Society (2017), 139(45), 16088-16091, database is CAplus and MEDLINE.

Cross-coupling reactions of aryl groups with α-fluoro carbonyl compounds catalyzed by Pd complexes are reported, but Pd fluoroenolate intermediates relevant to such reactions were not isolated or even detected previously. The authors report the synthesis, structural characterization, and reactivity of C-bound arylpalladium fluoroenolate complexes ligated by monophosphines and bisphosphines. DPPF-ligated arylpalladium fluoroenolate complexes (DPPF = 1,1-bis(diphenylphosphino)ferrocene) derived from a monofluoroester, a difluoroester, difluoroamides, and difluoroacetonitrile underwent reductive elimination in high yields. Reductive elimination was faster from complexes containing less electron-withdrawing fluoroenolate groups and longer Pd-C(enolate) bonds than from complexes containing more electron-withdrawing fluoroenolate groups and shorter Pd-C(enolate) bonds. The rates of reductive elimination from these C-bound fluoroenolate complexes were significantly faster than those of the analogous trifluoromethyl complexes.

Journal of the American Chemical Society 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

Ward, Simon E. published the artcileIntegration of Lead Optimization with Crystallography for a Membrane-Bound Ion Channel Target: Discovery of a New Class of AMPA Receptor Positive Allosteric Modulators, Synthetic Route of 76283-09-5, the publication is Journal of Medicinal Chemistry (2011), 54(1), 78-94, database is CAplus and MEDLINE.

A novel series of AMPAR pos. modulators is described that were identified by high throughput screening. The mols. of the series have been optimized from a high quality starting point hit to afford excellent developability, tolerability, and efficacy profiles, leading to identification of a clin. candidate. Unusually for an ion channel target, this optimization was integrated with regular generation of ligand-bound crystal structures and uncovered a novel chemotype with a unique and highly conserved mode of interaction via a trifluoromethyl group.

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 C14H10O4S2, Synthetic Route of 76283-09-5.

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

Zhang, Qiang published the artcileDesign and synthesis of benzyl aminocoumarin and its anti-Alzheimer′s activity, Formula: C7H5Br2F, the publication is New Journal of Chemistry (2021), 45(37), 17287-17300, database is CAplus.

Benzylaminocoumarin is a kind of compound with coumarin skeleton and benzylamino side chain structure at positions 3 and 4. Our group has previously explored the AD activity of 3-(4-aminophenyl) coumarin and obtained benzylaminocoumarin by further structural modification of benzamide side chains. A total of 29 benzylaminocoumarins were synthesized, and the compounds were tested for anti-AD-related activities, and compounds M3, M11, M21 and M26 were found to show good AChE inhibitory activity by in vitro activity experiments, with compound M11 (IC50 = 0.068 ± 0.04) showing better AChE inhibitory activity than the pos. drug donepezil (IC50 = 0.079 ± 0.008). The compound showed good MAO inhibitory activity against M3 and M11, of which compound M11 (IC50 = 6.312 ± 0.03) showed the best MAO-B inhibitory activity, but was weaker than the pos. drug donepezil (IC50 = 1.697 ± 0.01). The exptl. results showed that compounds M21 and M26 could selectively inhibit the AChE activity, and their probability of producing toxic side effects was low. Compound M11 shows dual AChE and MAO inhibitory activity and can be used as a potential therapeutic agent for the treatment of AD. In anti-AD multitarget drug research, multitarget inhibitors have low limitations and are able to produce better therapeutic effects on the entire disease system.

New 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 C9H22OSi, Formula: C7H5Br2F.

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

Nishida, Akiko published the artcileHalogenation using quaternary ammonium polyhalides. XXVIII. Effect of substituents on brominating ability of quaternary ammonium tribromides, Recommanded Product: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, the publication is Technology Reports of the Yamaguchi University (1990), 4(4), 303-8, database is CAplus.

Trimethylammonium tribromides RC₆H₄R¹ (I) [R = 4-Me, 4-NO₂, R¹ = (CH₂NMe₃)⁺Br₃^–, (NMe₃)⁺Br₃^–] were prepared and served as brominating reagents for 2-methoxyphenol (II). Thus, I [R = 4-Me, R¹ = (CH₂NMe₃)⁺Br₃^–] (III) was prepared by condensing 4-MeC₆H₄CH₂Br with NMe₃ followed by treatment with NaBrO₃/HBr. III brominated II to give 4,6-dibromo-2-methoxyphenol. The brominating ability of these compounds was compared to the corresponding phenylanalogs I [R = H, R¹ = (CH₂NMe₃)⁺Br₃^–, (NMe₃)⁺Br₃^–].

Technology Reports of the Yamaguchi University published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Recommanded Product: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide.

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

Brueckner, Alexander C. published the artcileVisible-light-mediated, nitrogen-centered radical amination of tertiary alkyl halides under metal-free conditions to form α-tertiary amines, Product Details of C6H12Br2, the publication is Organic & Biomolecular Chemistry (2016), 14(19), 4387-4392, database is CAplus and MEDLINE.

A mild and operationally convenient amino-functionalization of a range of tertiary alkyl halides by reaction with iminoiodinanes (PhI=NNs) and I₂ was developed. According to the mechanistic experiments described within the reaction was speculated to proceed through a light-promoted, N-centered radical pathway involving a N,N-diiodosulfonamide reactive species. This method of direct N-incorporation offers an attractive alternative to the production of α-tertiary amines, a synthetically challenging structural class found in a variety of bioactive mols.

Organic & Biomolecular Chemistry 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, Product Details of C6H12Br2.

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

Al-Zoubi, Raed M. published the artcileMild Silver(I)-Mediated Regioselective Iodination and Bromination of Arylboronic Acids, Product Details of C7H8BBrO3, the publication is Organic Letters (2010), 12(11), 2480-2483, database is CAplus and MEDLINE.

A convenient and regioselective silver(I)-mediated electrophilic iodination and bromination reaction of arylboronic acids has been developed. The boronic acid does not require protection prior to the reaction, which can be performed on a multigram scale with moderate to excellent yields. A mild, simple, and effective method is disclosed to provide ortho-haloarylboronic acids, e.g. I, that can be used as useful intermediates in selective sequential Suzuki-Miyaura cross-coupling reactions to provide ortho-triaryl derivatives, e.g. II, in good yields.

Organic Letters 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, Product Details of C7H8BBrO3.

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

Altona, Cornelis published the artcileConformation of open chain compounds. II. Dipole moments and conformational equilibrium of some vicinal dibromides, the benzene effect, Category: bromides-buliding-blocks, the publication is Recueil des Travaux Chimiques des Pays-Bas (1968), 87(3), 279-88, database is CAplus.

The dipole moments of 6 title compounds such as CH2BrCH2Br and Me3CHBrCH2Br, were measured in CCl4 and C6H6. The gauche Br….Br interaction energy was solvent dependent; its value was 380 ± 30 cal./mole lower in C6H6 than in CCl4.

Recueil des Travaux Chimiques des Pays-Bas 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, Category: bromides-buliding-blocks.

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

Altona, C. published the artcileConformation of open-chain compounds. III. Carbon-halogen stretching frequencies and conformation of some vicinal dihalides, Computed Properties of 594-81-0, the publication is Recueil des Travaux Chimiques des Pays-Bas (1969), 88(1), 33-42, database is CAplus.

Hal = halogen throughout. A study of the ir and Raman spectra of some vicinal dihaloethanes, propanes and butanes with predominant antiperiplanar orientation in the straight chain and branched series, reveals that the 2 C-Hal stretching frequencies occur characteristically as a more or less strongly coupled pair: an intense Raman band (νs) and a strong ir active mode of vibration (νas) at lower frequency. The C-Hal frequencies of the gauche conformations are weakly coupled. The position of the bands and the difference Δν = νs – νas are functions of the chem./geometrical structure in the vicinity of the C-Hal bonds. Empirical rules are presented by which the C-Hal frequencies or, in strongly coupled systems, the average frequency of anti as well as of gauche forms can be predicted with fair accuracy.

Recueil des Travaux Chimiques des Pays-Bas 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, Computed Properties of 594-81-0.

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

Bicciocchi, Erika published the artcileAn Alternating Donor-Acceptor Conjugated Polymer Based on Benzodithiophene and [3,4-c]pyrrole-4,6-dione: Synthesis, Characterization, and Application in Photovoltaic Devices, HPLC of Formula: 303734-52-3, the publication is Australian Journal of Chemistry (2015), 68(11), 1773-1782, database is CAplus.

The synthesis is described of a new alternating donor-acceptor semiconducting polymer based on an N-octylthieno[3,4-c]pyrrole-4,6-dione building block together with a newly designed 2,3-bis(2-ethylhexyl)thiophenylethynyl substituted benzodithiophene (BDT). The introduction of electron-rich thiophene units to BDT raises the HOMO level of the conjugated polymer and the concomitant reduction of the bandgap enhances the harvesting of solar radiation. This modification also introduces less sterically demanding triple bonds, thereby potentially enabling more favorable mol. interactions and an extra dimension of conjugation perpendicular to the main polymer chain. The optoelectronic properties of this new conjugated polymer were evaluated using UV-visible absorption and fluorescence spectroscopy, photoelectron spectroscopy in air, photo-induced charge extraction by linearly increasing voltage (Photo-CELIV), and d. functional theory calculations The polymer absorbs broadly in the wavelength range 300-700 nm in solution and the solid state. The estimated HOMO and LUMO levels of -5.4 and -3.6eV, resp., correspond to a bandgap of 1.8eV. Photovoltaic devices fabricated using the polymer as the active layer displayed power conversion efficiencies (PCEs) of up to 1%. Photo-CELIV results provide evidence that rapid recombination and poor charge mobility are likely contributing factors to the relatively low PCE values observed

Australian Journal of Chemistry 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

Patil, Nandkumar M. published the artcileHeterogenized copper catalysts for the amination of aryl halide: Synthesis, characterization and catalytic applications, Recommanded Product: Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), the publication is Applied Catalysis, A: General (2010), 372(1), 73-81, database is CAplus.

This research investigated the synthesis, characterization and catalytic activity of heterogenized copper complexes for the selective amination of aryl halides. Amination reactions using homogeneous copper catalyst systems are not generally selective and it is also difficult to recover the catalyst from the homogeneous system for recycling. To overcome these difficulties, our efforts were directed towards the development of cheaper heterogeneous catalyst systems, which can be easily recovered and recycled. Heterogenized analogs of the homogeneous Cu complexes were prepared using two methods: (a) encapsulation of copper complexes in zeolite-Y and (b) tethering of copper complexes on various supports like zeolite-Y, silica, charcoal, or clay. The encapsulated and tethered copper catalysts on zeolite-Y were characterized using EPR, diffuse reflectance UV-vis, XRD, IAS, ICPES, SEM, and TEM. The results confirmed that the copper complexes were truly heterogenized in zeolite-Y support. Encapsulated and tethered copper complexes were tested for amination of aryl iodide. The effects of various reaction parameters were examined using tethered Cu(Phen)(PPh₃)Br-PTA-Y catalyst to determine optimum conditions. A recycle study of encapsulated and tethered Cu catalyst was carried out to test their robustness for possible com. exploitation.

Applied Catalysis, A: General 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, Recommanded Product: Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I).

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