Category: bromides-buliding-blocks

Sankhla, Rekha published the artcileCorrelation analysis of reactivity in the oxidation of substituted benzylamines by benzyltrimethylammonium tribromide, Product Details of C10H16Br3N, the publication is Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry (2002), 41A(3), 541-546, database is CAplus.

The oxidation of benzylamine and twenty-seven ortho-, meta- and para-monosubstituted benzylamines by benzyltrimethylammonium tribromide (BTMAB), in dimethylsulfoxide (DMSO), gives corresponding aldimines. The reaction is first order with respect to both BTMAB and the amine. The oxidation of deuterated benzylamine exhibited a substantial kinetic isotope effect. Addition of benzyltrimethylammonium bromide does not affect the rate. Tribromide ion was postulated as the reactive oxidizing species. The rates of the oxidation of para- and meta-substituted benzylamines showed excellent correlation in terms of both Taft’s dual substituent-parameter and Charton’s triparametric LDR equations, whereas the ortho-substituted compounds exhibited the best correlation with the Charton’s tetraparametric LDRS equation. The oxidation of para-substituted benzylamines is more susceptible to the delocalization effect than is the oxidation of ortho- and meta-substituted compounds, which display a greater dependence on the field effect. The low pos. value of the η suggests an electron-deficient center in the rate-determining transition state with less charge separation A suitable mechanism was proposed.

Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry 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, Product Details of C10H16Br3N.

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

Suri, Deepa published the artcileKinetics and mechanism of the oxidation of formic and oxalic acids by benzyltrimethylammonium tribromide, Quality Control of 111865-47-5, the publication is Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry (1998), 37B(5), 448-452, database is CAplus.

The oxidation of formic and oxalic acids by benzyltrimethylammonium tribromide (BTMAB) leads to the formation of carbon dioxide. The reaction is first order with respect to BTMAB. Michaelis-Menten type kinetics are observed with respect to substrate. The values of the formation constants for the organic acid-BTMAB complexes and the rates of their decomposition, at different temperatures, have been determined Oxidation of α-deuterioformic acid indicated the presence of a primary kinetic isotope effect (k_H/k_D = 6.03 at 298 K). With an increase in the polarity of solvent, the formation constants for the complexes decrease however, their rates of decomposition increase. Suitable mechanisms involving the formation of acyclic and cyclic intermediates in the oxidations of formic and oxalic acids resp., have been proposed.

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry 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 C6H8O3, Quality Control of 111865-47-5.

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

Zhang, Huihui published the artcileRadical-Mediated Distal Ipso-Migration of O/S-Containing Heteroaryls and DFT Studies for Migratory Aptitude, Category: bromides-buliding-blocks, the publication is Organic Letters (2020), 22(15), 5947-5952, database is CAplus and MEDLINE.

Herein we describe an efficient distal ipso-migration of O- and S-containing heteroaryls and the radical heteroarylation of unactivated alkenes. The migration is triggered by various fluoroalkyl radicals, leading to valuable multifunctionalized ketones. The comparisons of migratory aptitude for O-/S-containing heteroaryls are comprehensively investigated. The origin of the chemoselective migration could be partially attributed to the discrepancy in the energy level of the LUMO of each heteroaryl group.

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 C10H16Br3N, Category: bromides-buliding-blocks.

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

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

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

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

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

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

Boebel, Timothy A. published the artcileIridium-Catalyzed Preparation of Silylboranes by Silane Borylation and Their Use in the Catalytic Borylation of Arenes, Quality Control of 1075719-78-6, the publication is Organometallics (2008), 27(22), 6013-6019, database is CAplus.

Silylboranes are versatile reagents for transition metal-catalyzed reactions of unsaturated organic mols. These reagents are typically prepared by the addition of a silyl lithium species to a boron electrophile. However, the need to generate anionic silane reagents limits the scope of silylboranes that can be readily obtained. Here, the synthesis of trialkylsilylboranes by borylation of silanes catalyzed by iridium complexes is described. The reaction of trialkylhydrosilanes with B₂pin₂ catalyzed by the combination of [Ir(OMe)cod]₂ and 4,4′-di-tert-butylbipyridine forms trialkylsilylboronic esters. In addition, these trialkylsilylboranes serve as boron sources for iridium-catalyzed borylation of aryl C-H bonds. In contrast to diboron reagents, the silylboranes react with methylarenes at both the aryl and Me C-H bonds.

Organometallics 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 C12H15BBr2O2, Quality Control of 1075719-78-6.

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