Category: bromides-buliding-blocks

《Fully renewable limonene-derived polycarbonate as a high-performance alkyd resin》 was published in Polymer International in 2020. These research results belong to Li, Chunliang; Veldhuis, Theo; Reuvers, Bart; Sablong, Rafael J.; Koning, Cor E.. Product Details of 1530-32-1 The article mentions the following:

Limonene-derived polycarbonate-based alkyd resins (ARs) have been prepared by copolymerization of limonene dioxide with CO2, catalyzed by a β-diiminate zinc-bis(trimethylsilyl)amido complex, and subsequent chem. modification with soybean oil fatty acids using triphenylethylphosphonium bromide as the catalyst. This quant. partial modification was realized via epoxy-carboxylic acid chem., affording ARs with higher oil lengths, lower polydispersities and higher glass transition temperatures (Tg) in comparison to a conventional polyester AR based on phthalic acid, multifunctional polyol pentaerythritol and soybean fatty acid. The novel limonene polycarbonate AR and the conventional polyester AR were evaluated as coatings and both the phys. drying (without the presence of the oxidative drying accelerator Borchi Oxy Coat) and chem. curing (with Borchi Oxy Coat) processes of these coatings were monitored by measuring the Koenig hardness and complex modulus development with time. A better performance was obtained for the alkyd paint containing polycarbonates modified with fatty acids (FA-PCs), which showed a faster chem. drying, a higher Koenig hardness and a higher Tg in coating evaluation, demonstrating that the fully renewable FA-PCs are promising resins for alkyd paint applications. The experimental process involved the reaction of Ethyltriphenylphosphonium bromide(cas: 1530-32-1Product Details of 1530-32-1)

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Product Details of 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Hydrogenation of Alkenes Catalyzed by a Non-pincer Mn Complex》 was published in ChemCatChem in 2020. These research results belong to Rahaman, S. M. Wahidur; Pandey, Dilip K.; Rivada-Wheelaghan, Orestes; Dubey, Abhishek; Fayzullin, Robert R.; Khusnutdinova, Julia R.. Product Details of 14516-54-2 The article mentions the following:

Hydrogenation of substituted styrenes and unactivated aliphatic alkenes by mol. hydrogen has been achieved using a Mn catalyst with a non-pincer, picolylphosphine ligand. This is the second reported example of alkene hydrogenation catalyzed by a Mn complex. Mechanistic studies showed that a Mn hydride formed by H2 activation in the presence of a base is the catalytically active species. Based on exptl. and DFT studies, H2 splitting is proposed to occur via a metal-ligand cooperative pathway involving deprotonation of the CH2 arm of the ligand, leading to pyridine dearomatization. In the experiment, the researchers used many compounds, for example, Bromopentacarbonylmanganese(I)(cas: 14516-54-2Product Details of 14516-54-2)

Bromopentacarbonylmanganese(I)(cas: 14516-54-2) has many other uses. It is used in the formation of (eta6-arene)tricarbonylmanganese(I) by reacting with arene (arene= hexamethyl benzene, 1,2,4,5-tetramethyl benzene, mesitylene, p-xylene and toluene) in the presence silver salt.Product Details of 14516-54-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Zhong, Qidi; Wang, Yinxin; Lan, Hanyang; Zhu, Hao; Fan, Qiangwen published an article in Journal of Organic Chemistry. The title of the article was 《Construction of 3,12-Diazatetracyclododecane-dienes through Unexpected Visible-Light-Induced Radical Cascade Cyclization》.Application In Synthesis of (Bromomethyl)cyclopropane The author mentioned the following in the article:

A novel visible-light-induced cascade radical cyclization reaction of 3-cyano-4-aryl-1,4-dihydropyridines I (R1 = cyclopropylmethyl, benzyl, 4-chlorobenzyl, naphthalen-2-ylmethyl, etc.; R2 = Ph, 4-chlorophenyl, 3-methylphenyl, 2-fluorophenyl, etc.) for the construction of 3,12-diazatetracyclododecane-diene derivatives II is reported for the first time. In the presence of 410 nm blue LED lamp as the light source and ethanol as the solvent, the reactions proceed smoothly to afford photocyclization products in good yields. The process is carried out through the breaking of original C=C double bonds and the formation of three new single bonds in one pot and proved to be able to tolerate different substituents. The experimental process involved the reaction of (Bromomethyl)cyclopropane(cas: 7051-34-5Application In Synthesis of (Bromomethyl)cyclopropane)

(Bromomethyl)cyclopropane(cas: 7051-34-5) is used as a synthetic building block for the introduction of the cyclopropylmethyl group. It was also used in the synthesis of 1,4-dienes via iron-catalyzed cross-coupling with alkenyl Grignard reagents.Application In Synthesis of (Bromomethyl)cyclopropane

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Wang, Zhifan; Yang, Beiqi; Yang, Qi; Wang, Yuanhua published an article in Organic Chemistry Frontiers. The title of the article was 《C(sp3)-H 1,3-diamination of cumene derivatives catalyzed by a dirhodium(II) catalyst》.Safety of 1-Bromo-3,4,5-trimethoxybenzene The author mentioned the following in the article:

The simultaneous and direct amination of multiple inert Csp3-H bonds is a challenging method for C-N bond formation. Here, a radical sequential reaction mediated by a dirhodium(II) catalyst was developed for the successful one-step synthesis of 1,3-diamines via the interaction of cumene derivatives with N-fluorobenzenesulfonimide (NFSI). Mechanistic studies revealed that the reaction underwent an iterative radical polar crossover and desaturation activation procedure to achieve the activation of three adjacent C-H bonds. The synthesized diamine compounds were converted into useful functional mols. by further removal of phenylsulfonyl groups. In the experiment, the researchers used many compounds, for example, 1-Bromo-3,4,5-trimethoxybenzene(cas: 2675-79-8Safety of 1-Bromo-3,4,5-trimethoxybenzene)

1-Bromo-3,4,5-trimethoxybenzene(cas: 2675-79-8) is an important raw material and intermediate used in organic synthesis, pharmaceuticals, agrochemicals and dyestuff.Safety of 1-Bromo-3,4,5-trimethoxybenzene1-Bromo-3,4,5-trimethoxybenzene can be used to synthesize N,N′-diarylated indolo[3,2-b]carbazole derivatives, which can find applications in electrophotography.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Tajimi, Yuka; Nachi, Yasuhiro; Inada, Ryoko; Hashimoto, Ryoga; Yamawaki, Mugen; Ohkubo, Kei; Morita, Toshio; Yoshimi, Yasuharu published an article in Journal of Organic Chemistry. The title of the article was 《9-Cyano-10-methoxycarbonylanthracene as a Visible Organic Photoredox Catalyst in the Two-Molecule Photoredox System》.Name: 9,10-Dibromoanthracene The author mentioned the following in the article:

Visible-light-induced decarboxylative and deboronative reactions using two-mol. organic photoredox catalysts, namely, phenanthrene (Phen) and biphenyl (BP), as electron donors and 9-cyano-10-methoxycarbonylanthracene 1a as an electron acceptor were achieved. The high solubility of 1a significantly improved the reaction efficiency and product yield. In addition, the facile tuning of the oxidation potential of the electron-donor mol. via the replacement of Phen with BP enabled the application of the two-mol. photoredox system to a wide range of substrates. The experimental process involved the reaction of 9,10-Dibromoanthracene(cas: 523-27-3Name: 9,10-Dibromoanthracene)

9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.Name: 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Zhu, Jinwei; Lou, Xiaoyu; Wang, Yubing; Xiong, Zhuo; Chen, Jie; Yan, Wei published an article in Chemical Engineering Science. The title of the article was 《Conjugated microporous poly(aniline)s for removal of low-concentration formaldehyde》.Electric Literature of C18H12Br3N The author mentioned the following in the article:

Removal of indoor formaldehyde is important but challenging due to the low concentration Here, we showed the applicability of a new class of conjugated microporous poly(aniline)s (CMPAs) in this formaldehyde capture. The unique properties of rich ultramicroporosity and benzenoid amine (-NH-) groups made the resulting CMPAs ideal platforms for the efficient low-concentration formaldehyde adsorption, through the interaction between benzenoid amine groups and formaldehyde via Mannich reaction and H-bond in the ultramicropore. They therefore exhibited ultrafast adsorption, receiving > 80% removal efficiency for ca 0.7 ppm formaldehyde within 60 min, and benchmarking storage capacity, achieving ∼2679.68 mg·g-1 for CMPA-2. Our CMPAs also worked well in a self-assembled air clean unit, keeping kinetically reducing average 98% of formaldehyde after treatment of 4000 BV polluted air (with ∼25 ppm formaldehyde) without break-through. Outcomes highlighted the potential of CMPAs for the clean-up of airborne formaldehyde for human health protection in next generation. In the experiment, the researchers used Tris(4-bromophenyl)amine(cas: 4316-58-9Electric Literature of C18H12Br3N)

In other references, Tris(4-bromophenyl)amine(cas: 4316-58-9) is often used in the synthesis of porous luminescent covalent–organic polymers (COPs)Electric Literature of C18H12Br3N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Wu, Yimin; Zhang, Ling; Ma, Fudong; Ding, Tao; Obolda, Ablikim published an article in Designed Monomers and Polymers. The title of the article was 《Synthesis of carbazole-based dendritic conjugated polymer: dual channel optical probe for detection of iodine (-) and mercury (2+)》.Recommanded Product: 6825-20-3 The author mentioned the following in the article:

A new type of carbazole-based blue-emitting dendritic conjugated polymer, poly[(9,9-dioctyl)-2,7-fluorene-co-4,4′,4”-triphenylamine-co-9-(4-(9H-carbazol-9-yl)butyl)-3,6-carbazole](P), was successfully synthesized by Suzuki coupling reaction. Chem. structures of monomers and polymer were verified by FI-IR and 1HNMR characterizations. We found that polymer showed a special selectivity and high sensitivity for I-. With the addition of I-, the fluorescent polymer solution was obviously quenched. The polymer showed a special detection effect on I-. However, the fluorescent polymer was obviously restored when Hg2+ was added to the P/I- system due to the large complexation between I- and Hg2+. The anti-interference experiments of probe P/I- showed that other background cations have a slight influence on detecting Hg2+, and the calculated detection limit of Hg2+ reached 9.7 x 10-8 M, which could be a potential application for a two-channel cyclic detection of I- and Hg2+. Addnl., it was found that the theor. values were in agreement with the exptl. data. In the experiment, the researchers used many compounds, for example, 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Recommanded Product: 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent. And it has been used in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Recommanded Product: 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Si, Min; Yan, Jiaqi; Ding, Yongzheng; Huang, Hanmin published an article in Organic & Biomolecular Chemistry. The title of the article was 《Pd-Catalyzed carbonylative lactonization of 2-halidearomatic aldehydes with H2O as a nucleophile》.Name: o-Bromobenzaldehyde The author mentioned the following in the article:

A palladium-catalyzed carbonylative cyclization reaction of 2-halidebenzaldehydes with H2O was described, which provided a strategy for the synthesis of diversely substituted 3,3′-oxyphthalides. Notably, the obtained 3,3′-oxyphthalide could be easily transformed into 3-aryl and alkyl phthalides with excellent efficiency using organozinc reagents under mild reaction conditions. The experimental process involved the reaction of o-Bromobenzaldehyde(cas: 6630-33-7Name: o-Bromobenzaldehyde)

o-Bromobenzaldehyde(cas: 6630-33-7) is used in L-threonine aldolase-catalyzed enantio/diastereoselective aldol reactions.Name: o-BromobenzaldehydeSynthetic applications of o-Bromobenzaldehyde include: synthesis of aza-fused polycyclic quinolines through copper-catalyzed cascade reaction, preparation of 1-substituted indazoles by CuI-catalyzed coupling with N-aryl hydrazides.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Zhang, Can; Hu, Jinnuo; Song, Jingya; Wu, Maotong; Zhang, Zhen published an article in ACS Food Science & Technology. The title of the article was 《Development of ic-ELISAs for the Detection of Bisphenol A Diglycidyl Ether and Its Derivatives in Canned Luncheon Meats》.Name: Ethyl 4-bromobutyrate The author mentioned the following in the article:

Canned foods are widely consumed because of their convenience, hygiene, and nutrition. Bisphenol A diglycidyl ether (BADGE), an industrial product of epichlorohydrin and bisphenol A, widely exists in the inner coating of canned foods. A hydrolysis or chlorination reaction of BADGE can occur in the process of storage, forming a variety of derivatives such as bisphenol A (2,3-dihydroxypropyl) glycidyl ether (BADGE·H2O), bisphenol A (3-chloro-2-hydroxypropyl) glycidyl ether (BADGE·HCl), and bisphenol A (3-chloro-2-hydroxypropyl) (2,3-dihydroxypropyl) glycidyl ether (BADGE·HCl·H2O), which seriously threaten consumer′s health. In this research, two haptens were successfully synthesized, and antibodies were obtained by the s.c. immunization of New Zealand rabbits. Indirect competitive enzyme-linked immunosorbent assays (ic-ELISAs) were established for the detection of BADGE, BADGE·H2O, BADGE·HCl, and BADGE·HCl·H2O, and the IC15 values (concentrations at an inhibition rate of 15%) were determined as 0.73, 0.39, 0.78, and 1.45 ng/mL, resp. The recovery of BADGE and its derivatives at various spiking levels in canned luncheon meat samples ranged from 76.70 to 98.35%. The results detected by the proposed ic-ELISAs were also validated by HPLC anal., which showed a good agreement (R2 = 0.9861). In the experiment, the researchers used Ethyl 4-bromobutyrate(cas: 2969-81-5Name: Ethyl 4-bromobutyrate)

Ethyl 4-bromobutyrate(cas: 2969-81-5) belongs to bromides. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents.Name: Ethyl 4-bromobutyrate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Meng, Shuai; Hettiarachchi, Ishani Lakshika; Bhetuwal, Bishwa Raj; Thapa, Prakash; Zhu, Jianglong published an article in Journal of Organic Chemistry. The title of the article was 《Stereoselective Synthesis of β-D-Manno-heptopyranoside via Cs2CO3-Mediated Anomeric O-Alkylation: Synthesis of a Tetrasaccharide Repeating Unit of Bacillus thermoaerophilus Surface-Layer Glycoprotein》.Formula: C19H18BrP The author mentioned the following in the article:

Stereoselective synthesis of D-glycero- and L-glycero-β-D-mannoheptosides has been achieved by cesium carbonate-mediated β-selective anomeric O-alkylation of the corresponding D-mannoheptoses. In addition, this method has been utilized in the total synthesis of a tetrasaccharide repeat unit of Bacillus thermoaerophilus surface-layer glycoprotein. The results came from multiple reactions, including the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3Formula: C19H18BrP)

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is used for methylenation through the Wittig reaction. It is utilized in the synthesis of an enyne and 9-isopropenyl -phenanthrene by using sodium amide as reagent. Formula: C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary