Category: bromides-buliding-blocks

In 2022,Jiao, Nianming; Yuan, Yanyan; Yao, Yuan; Liu, Long; Zhang, Yanqiang published an article in Fuel Processing Technology. The title of the article was 《Strained carbocycle based hypergolic ionic fuels with the improved energy capacity》.Product Details of 7051-34-5 The author mentioned the following in the article:

Different from the previous nitrogenous groups, we present a new strategy of improving the ionic liquids (ILs) energy capacity by introducing the strained carbocycles. The ILs with three- and/or four-member carbocycles were prepared, and their physicochem. properties as rocket fuels were studied. The ignition tests show that all of these ILs have the expected hypergolic reactivity with the oxidizer (white fuming HNO3). In virtue of the strained cyclopropane and cyclobutane substituents, the resulting hypergolic ILs possess better energy properties (heats of formation 0.784-1.968 kJ g-1; specific impulses 313.0-315.7 s) and densities (1.03-1.15 g cm-3) than the corresponding ILs with n-alkyl substituents. This strategy of introducing strained ring groups into hypergolic ILs gives a new approach to improve energy properties of hypergolic ILs. The experimental part of the paper was very detailed, including the reaction process of (Bromomethyl)cyclopropane(cas: 7051-34-5Product Details of 7051-34-5)

(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.Product Details of 7051-34-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Liu, Jie; Xu, Xinxin; Wu, Aihong; Song, Shanshan; Xu, Liguang; Xu, Chuanlai; Kuang, Hua; Liu, Liqiang published an article in LWT–Food Science and Technology. The title of the article was 《Immunochromatographic assay for the rapid and sensitive detection of etoxazole in orange and grape samples》.Name: Ethyl 4-bromobutyrate The author mentioned the following in the article:

Etoxazole, a novel organofluorine pesticide, has been widely used against various mites in fruits and vegetables. In this study, we designed an etoxazole-hapten and produced a highly sensitive monoclonal antibody (mAb) against etoxazole with a half-maximal inhibitory concentration of 4.04 ng/mL. Based on the mAb, we developed an immunochromatog. assay (ICA) for the detection of etoxazole in orange and grape samples. In the qual. detection, the visible limit of detection (vLOD) and cut-off value were 10 and 100 ng/g (fresh weight), resp. In the quant. detection, the LOD value was 2.03 ng/g (fresh weight) in orange and 2.52 ng/g (fresh weight) in grape samples. The recovery rates ranged from 94.7 ± 4.0% to 103.3 ± 3.8%, with CVs of 3.7-4.2% and 96.4 ± 3.4% to 106.1 ± 5.5%, with CVs of 3.5-5.2% for etoxazole in grape and orange samples, resp. The ICA results were similar to those of LC-MS/MS. Therefore, our developed ICA is a rapid, sensitive, and simple tool for screening etoxazole residues in fruits and vegetables. In addition to this study using Ethyl 4-bromobutyrate, there are many other studies that have used Ethyl 4-bromobutyrate(cas: 2969-81-5Name: Ethyl 4-bromobutyrate) was used in this study.

Ethyl 4-bromobutyrate(cas: 2969-81-5) belongs to bromides. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. Organobromine compounds have fallen under increased scrutiny for their environmental impact.Name: Ethyl 4-bromobutyrate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Li, Wanjiang; Chen, Longbin; Dong, Jiao; Feng, Yancong; Wang, Yao; Li, Hao; Zhou, Guofu published an article in ACS Applied Polymer Materials. The title of the article was 《Water- and Heat-Induced Crack-Healing of UCST-Type Poly(acrylamide-co-acrylonitrile) with Intrinsic Controllability and Reversibility》.Application of 623-24-5 The author mentioned the following in the article:

Autonomic crack-healing technol. has become a common option for reconstructing polymer networks against mech. degradation, structure mismatch, material fatigue, and even performance failure, but how to precisely and easily trigger this healing process on the crack interfaces is still a huge challenge. Here, we first found an autonomic physicochem. crack-healing behavior featuring intrinsic controllability and reversibility, based on nonionic poly(acrylamide-co-acrylonitrile) [P(AAm-co-AN)] with an upper critical solution temperature (UCST). Under the fast synergistic action between extrinsic deionized water and heat, the scratched P(AAm-co-AN) layer fully returned to the original flat form and was reworked at least five times. Meanwhile, their corresponding optical and mech. performances also recovered almost 100%. In particular, the intrinsic thermoresponsiveness of P(AAm-co-AN) takes a leading role in this crack-healing process, in which both interchain transition and topol. entanglement come into play. It provides a facile, rapid, precise, green, and autonomic crack-healing strategy for improving polymer durability. The results came from multiple reactions, including the reaction of 1,4-Bis(bromomethyl)benzene(cas: 623-24-5Application of 623-24-5)

1,4-Bis(bromomethyl)benzene(cas: 623-24-5) belongs to organobromine compounds.Most of the natural organobromine compounds are produced by marine organisms , and several brominated metabolites with antibacterial , antitumor , antiviral , and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. Application of 623-24-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Parsutkar, Mahesh M.; Moore, Curtis E.; RajanBabu, T. V. published an article in Dalton Transactions. The title of the article was 《Activator-free single-component Co(I)-catalysts for regio- and enantioselective heterodimerization and hydroacylation reactions of 1,3-dienes. New reduction procedures for synthesis of [L]Co(I)-complexes and comparison to in situ generated catalysts》.SDS of cas: 13465-09-3 The author mentioned the following in the article:

Although cobalt(I) bis-phosphine complexes have been implicated in many selective C-C bond-forming reactions, until recently relatively few of these compounds have been fully characterized or have been shown to be intermediates in catalytic reactions. In this paper we present a new practical method for the synthesis and isolation of several cobalt(I)-bis-phosphine complexes and their use in Co(I)-catalyzed reactions. We find that easily prepared (in situ generated or isolated) bis-phosphine and (2,6-N-aryliminoethyl)pyridine (PDI) cobalt(II) halide complexes are readily reduced by 1,4-bis-trimethylsilyl-1,4-dihydropyrazine or com. available lithium nitride (Li3N), leaving behind only innocuous volatile byproducts. Depending on the structures of the bis-phosphines, the cobalt(I) complex crystallizes as a phosphine-bridged species [(P-P)(X)CoI[μ-(P-P)]CoI(X)(P-P)] or a halide-bridged species [(P-P)CoI[μ-(X)]2CoI(P-P)]. Because the side-products are innocuous, these methods can be used for the in situ generation of catalytically competent Co(I) complexes for a variety of low-valent cobalt-catalyzed reactions of even sensitive substrates. These complexes are also useful for the synthesis of rare cationic [(P-P)CoI-η4-diene]+[X-] or [(P-P)CoI-η6-arene]+[X-] complexes, which are shown to be excellent single-component catalysts for the following regioselective reactions of dienes: heterodimerizations with ethylene or Me acrylate, hydroacylation and hydroboration. The reactivity of the single-component catalysts with the in situ generated species are also documented.Indium(III) bromide(cas: 13465-09-3SDS of cas: 13465-09-3) was used in this study.

Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.SDS of cas: 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Yao, Chengbo; Williams, Alana D. N.; Gu, Yiting; Norton, Jack R. published an article in Journal of Organic Chemistry. The title of the article was 《Isomerization of Aziridines to Allyl Amines via Titanium and Chromium Cooperative Catalysis》.Safety of Ethyltriphenylphosphonium bromide The author mentioned the following in the article:

A Ti/Cr cooperative catalyst isomerized aziridines to allyl amines under mild conditions. The reaction tolerated a broad range of aziridines with various nitrogen substituents. The titanium catalyst was most successful in opening 1,2-disubstituted aziridines, forming radical intermediates in a highly regioselective manner. The chromium catalyst appears to abstract an H• from these radical intermediates and then return the H• to the titanium system in the form of an H+ and an electron. The reaction was complementary to previous reports on the isomerization of aziridines to allyl amines. After reading the article, we found that the author used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Safety of Ethyltriphenylphosphonium bromide)

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.Safety of Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Liyan; Jin, Tengda; Guo, Yingjie; Martin, A. C.; Sun, Keju; Dudley, Gregory B.; Yang, Jingyue published an article in 2021. The article was titled 《Synthesis of gem-Dimethylcyclopentane-Fused Arenes with Various Topologies via TBD-Mediated Dehydro-Diels-Alder Reaction》, and you may find the article in Journal of Organic Chemistry.Reference of 2,5-Dibromothiophene The information in the text is summarized as follows:

The development of efficient methods for the synthesis of substituted polycyclic arenes with various topologies is in high demand due to their excellent elec. and optical properties. In this work, a series of gem-dimethylcyclopentane-fused arenes with more than ten topologies were synthesized via a 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD)-mediated dehydro-Diels-Alder reaction with moderate to good yields. The introduction of the near-planar gem-dimethylcyclopentane moiety not only impacts the mol. conjugative system but also regulates the intermol. π-π interactions and crystal packing, which are critical for the photoelec. performance of arenes. The photophys. properties, mol. geometry, mol. packing of these compounds, and electrochem. properties were investigated by UV-vis absorption, fluorescence emission spectra, DFT calculations, single-crystal X-ray structure anal., and cyclic voltammetry study. In the experimental materials used by the author, we found 2,5-Dibromothiophene(cas: 3141-27-3Reference of 2,5-Dibromothiophene)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used as starting reagent for the synthesis of α,α′-didecylquater-, -quinque- and -sexi-thiophenes.Reference of 2,5-Dibromothiophene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ma, Yucheng; Zhuang, Zeyan; Xing, Longjiang; Li, Jianqing; Yang, Zhiwen; Ji, Shaomin; Hu, Rong; Zhao, Zujin; Huo, Yanping; Tang, Ben Zhong published an article in 2021. The article was titled 《The AIE-Active Dual-Cationic Molecular Engineering: Synergistic Effect of Dark Toxicity and Phototoxicity for Anticancer Therapy》, and you may find the article in Advanced Functional Materials.Product Details of 4316-58-9 The information in the text is summarized as follows:

The development of anticancer therapy is significant to human health but remains a huge challenge. Photodynamic therapy (PDT), inducing the synergistic mitochondrial dysfunction in cancer cells is a promising approach but suffer from the low efficiency in hypoxic microenvironment and deep-seated tumors. Herein, to improve the outcomes of PDT for cancer treatment, a series of red fluorophores consisting of dual-cationic triphenylphosphonium-alkylated pyridinium and (substituted) triphenylamine are prepared as organelle-targeting antitumor photosensitizers (PSs) with aggregation-induced emission characteristics. These PSs can selectively accumulate at the mitochondria or lysosomes of cancer cells with both dark- and photo-cytotoxicity, making them possess excellent killing effect on cancer cells and efficient inhibition of tumor growth in living mice. This study brings about new insight into the development of powerful cancer treatment. The results came from multiple reactions, including the reaction of Tris(4-bromophenyl)amine(cas: 4316-58-9Product Details of 4316-58-9)

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

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Pu, Mingrui; Chen, Hui; Chao, Pengjie; Zhu, Yulin; Zheng, Nan; Lai, Hanjian; Zhao, Tingxing; He, Feng published their research in ACS Applied Polymer Materials in 2021. The article was titled 《Chlorinated Random Terpolymers with Efficient Solar Conversion and Low Batch-to-Batch Variation》.Electric Literature of C4H2Br2S The article contains the following contents:

The strategy of random terpolymn. has been shown to be a flexible and effective method with which to construct state-of-the-art polymer donors, and chlorination has frequently been utilized to fine-tune material properties in these polymers with the aim of improving the solar conversion efficiency. Herein, three random terpolymers consisting of BDT, BDD, and Th-Cl monomers in the optimized ratio of 1:0.85:0.15 were synthesized in parallel in an effort to understand the effect of chlorination in terpolymer systems and the chlorine-containing derviatives (named PBDB-Th15, PBDB-ThCl15, and PBDB-Th2Cl15). Among these three polymers, PBDB-ThCl15 shows a low-lying HOMO level, the most balanced hole and electron mobility, and enhanced aggregation behavior in blend film as a result of the introduction of one chlorine atom. When blended with a small mol. acceptor Y6, the resulting PBDB-ThCl15:Y6-based device showed the highest PCE of 15.63% of the three polymers. The PBDB-Th15- and PBDB-Th2Cl15-based devices present relatively poor conversion efficiencies of 14.91% and 12.62%. Interestingly, the terpolymer PBDB-ThCl15 was repeatedly prepared by random terpolymn. under the same conditions, and a low batch-to-batch variation was observed with a PCE of 1̃5.50%. These results indicate that the synergy of chlorination with random terpolymn. promises to contribute to the preparation of stable and high-performance solar cell polymers. In the experimental materials used by the author, we found 2,5-Dibromothiophene(cas: 3141-27-3Electric Literature of C4H2Br2S)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used in the preparation of soluble α,ω-diformyl-a-oligothiophenes.Electric Literature of C4H2Br2S

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hu, Hongmei; Zhao, Meirong; Jin, Hangbiao published their research in Journal of Separation Science in 2021. The article was titled 《Determination of polyhalogenated carbazoles in waters at low nanogram-per-liter concentrations with solid-phase disk extraction》.SDS of cas: 6825-20-3 The article contains the following contents:

Polyhalogenated carbazoles, a class of emerging contaminants with persistence and dioxin-like toxicity, have received increasing attention in recent years. In this study, a simple, rapid, sensitive, and high throughput method based on solid-phase disk extraction and gas chromatog.-mass spectrometry was described for the determination of polyhalogenated carbazoles in low nanogram-per-liter range in water samples. The proposed solid-phase disk extraction method was initially optimized, and the optimum exptl. conditions found were 1 L water sample (pH 6-9) extracted and enriched by Empore 3-stn octadecyl disk at flow rate of 5 to 50 mL/min and eluted by 5 mL of acetone and 3 x 10 mL methylene dichloride. The linearity of the method ranged from 0.2 to 50 ng/L for carbazole and 11 polyhalogenated carbazoles, with correlation coefficients ranging from 0.9951 to 0.9996. The limits of detection were in the low nanogram per L level, ranging from 0.018 to 0.12 ng/L. Finally, the optimized method was applied for determining trace levels of carbazole and 11 polyhalogenated carbazoles in tap water and seawater samples with good recovery of 86.6-112.8%. Carbazole and 3-7 polyhalogenated carbazoles were detected, and 3,6-dichlorocarbazole was the predominant congener both in tap water and seawater. In the part of experimental materials, we found many familiar compounds, such as 3,6-Dibromo-9H-carbazole(cas: 6825-20-3SDS of cas: 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.SDS of cas: 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Chang-Cheng; Zhang, Guo-Xiang; Zuo, Zhi-Wei; Zeng, Rong; Zhai, Dan-Dan; Liu, Feng; Shi, Zhang-Jie published their research in Science China: Chemistry in 2021. The article was titled 《Photo-induced deep aerobic oxidation of alkyl aromatics》.Synthetic Route of C7H5BrO2 The article contains the following contents:

In this report, e.g., photo-induced deep aerobic oxidation of (poly)alkyl benzene toluene to benzene (poly)carboxylic acids e.g., benzoic acid was developed. CeCl3 was proved to be an efficient HAT (hydrogen atom transfer) catalyst in the presence of alc. as both hydrogen and electron shuttle. Dioxygen (O2) was found as a sole terminal oxidant. In most cases, pure products were easily isolated by simple filtration, implying large-scale implementation advantages. The reaction provides an ideal protocol to produce valuable fine chems. from naturally abundant petroleum feedstocks. The results came from multiple reactions, including the reaction of 4-Bromobenzoic acid(cas: 586-76-5Synthetic Route of C7H5BrO2)

4-Bromobenzoic acid(cas: 586-76-5) has been used in bromine-specific detection of the metabolites of 2-,3-and 4-bromobenzoic acid in the urine and bile of rats by inductively coupled plasma mass spectrometry.Synthetic Route of C7H5BrO2 It was used to study the metabolic fate of 2-,3-and 4-bromo benzoic acids in rat hepatocytes incubation using high temperature liquid chromatography.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary