Category: bromides-buliding-blocks

The author of 《Synthesis of difluoroalkylated 2-azaspiro[4.5]decane derivatives via copper-catalyzed difluoroalkylation/dearomatization of N-benzylacrylamides》 were Li, Chengwen; Zhao, Yilin; Zhou, Jiaxin; Wang, Xue; Hou, Jingli; Song, Yuguang; Liu, Wenjuan; Han, Guifang. And the article was published in Organic & Biomolecular Chemistry in 2020. Formula: C4H6BrFO2 The author mentioned the following in the article:

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. The experimental part of the paper was very detailed, including the reaction process of Ethylbromofluoroacetate(cas: 401-55-8Formula: C4H6BrFO2)

Ethylbromofluoroacetate(cas: 401-55-8) is a member of organofluorine compounds. Organofluorine compounds, which have carbon-fluorine bonds, show unique features such as high thermal and chemical stability, high surface activity, no light-absorbing ability, high pharmacological effect, and so on. Owing to their specific characters, they are indispensable chemicals for industry and our daily lives.Formula: C4H6BrFO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Photoredox-catalyzed redox-neutral difluoroalkylation to construct perfluoroketones with difluoroenoxysilanes》 were Zou, Jian-Yu; Wang, Yu-Zhao; Sun, Wen-Hui; Lin, Wu-Jie; Liu, Xue-Yuan. And the article was published in Organic & Biomolecular Chemistry in 2021. Product Details of 401-55-8 The author mentioned the following in the article:

A mild and facile approach to construct various perfluoroketones via photo-catalyzed difluoroalkylation of difluoroenoxysilanes is developed. The reaction includes a strategy of combination of two fluorine-containing functional groups, which confers the reaction with characteristics like high efficiency, mild conditions, and broad scope. A variety of fluoroalkyl halides including perfluoroalkyl iodides, bromo difluoro esters and amides can be employed as radical precursors. Control experiments indicate that a single-electron transfer pathway may be involved in the reaction. In the experiment, the researchers used many compounds, for example, Ethylbromofluoroacetate(cas: 401-55-8Product Details of 401-55-8)

Ethylbromofluoroacetate(cas: 401-55-8) is a member of organofluorine compounds. Organofluorine compounds, which have carbon-fluorine bonds, show unique features such as high thermal and chemical stability, high surface activity, no light-absorbing ability, high pharmacological effect, and so on. Owing to their specific characters, they are indispensable chemicals for industry and our daily lives.Product Details of 401-55-8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Donzel, Maxime; Elhabiri, Mourad; Davioud-Charvet, Elisabeth published their research in Journal of Organic Chemistry on August 6 ,2021. The article was titled 《Bioinspired Photoredox Benzylation of Quinones》.Computed Properties of C7H5Br2F The article contains the following contents:

3-Benzylmenadiones were obtained in good yield by using a blue-light-induced photoredox process in the presence of Fe(III), oxygen, and γ-terpinene acting as a hydrogen-atom transfer agent. This methodol. is compatible with a wide variety of diversely substituted 1,4-naphthoquinones as well as various cheap, readily available benzyl bromides with excellent functional group tolerance. The benzylation mechanism was investigated and supports a three-step radical cascade with the key involvement of the photogenerated superoxide anion radical. The experimental process involved the reaction of 4-Bromo-1-(bromomethyl)-2-fluorobenzene(cas: 76283-09-5Computed Properties of C7H5Br2F)

4-Bromo-1-(bromomethyl)-2-fluorobenzene(cas: 76283-09-5) 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. Computed Properties of C7H5Br2F In contrast, terrestrial plants account only for a few bromine-containing compounds.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Reference of EthylbromofluoroacetateOn May 28, 2020, Wang, Pingyuan; Luchowska-Stanska, Urszula; van Basten, Boy; Chen, Haiying; Liu, Zhiqing; Wiejak, Jolanta; Whelan, Padraic; Morgan, David; Lochhead, Emma; Barker, Graeme; Rehmann, Holger; Yarwood, Stephen J.; Zhou, Jia published an article in Journal of Medicinal Chemistry. The article was 《Synthesis and Biochemical Evaluation of Noncyclic Nucleotide Exchange Proteins Directly Activated by cAMP 1 (EPAC1) Regulators》. The article mentions the following:

EPAC plays a central role in various biol. functions, and activation of the EPAC1 protein has shown potential benefits for the treatment of various human diseases. Herein, the synthesis and biochem. evaluation of a series of non-cyclic nucleotide EPAC1 activators is reported. Several potent EPAC1 binders were identified, e.g., I, which promote EPAC1 GEF activity in vitro. These agonists can also activate EPAC1 protein in cells, where they exhibit excellent selectivity towards EPAC over PKA and GPCRs. Moreover, four compounds exhibited improved selectivity towards activation of EPAC1 over EPAC2 in cells. Of these, I was found to robustly inhibit IL-6-activated STAT3 and subsequent induction of the pro-inflammatory VCAM1 cell adhesion protein. These novel EPAC1 activators may therefore act as useful pharmacol. tools for elucidation of EPAC function as well as promising drug leads for the treatment of relevant human diseases. After reading the article, we found that the author used Ethylbromofluoroacetate(cas: 401-55-8Reference of Ethylbromofluoroacetate)

Ethylbromofluoroacetate(cas: 401-55-8) is a member of organofluorine compounds. Organofluorine compounds, which have carbon-fluorine bonds, show unique features such as high thermal and chemical stability, high surface activity, no light-absorbing ability, high pharmacological effect, and so on. Owing to their specific characters, they are indispensable chemicals for industry and our daily lives.Reference of Ethylbromofluoroacetate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Structure-Activated Copper Photosensitizers for Photocatalytic Water Reduction》 was published in Chemistry – A European Journal in 2017. These research results belong to Chen, Nan-Yu; Xia, Liang-Min; Lennox, Alastair J. J.; Sun, Yuan-Yuan; Chen, Hao; Jin, Hai-Ming; Junge, Henrik; Wu, Qin-An; Jia, Jian-Hong; Beller, Matthias; Luo, Shu-Ping. SDS of cas: 97802-08-9 The article mentions the following:

A series of phenanthroline-based ligands have been synthesized and their influence as bidentate nitrogen ligands in heteroleptic [Cu(PP̂)(NN̂)]+ photosensitizers in light-driven water reduction has been studied. In this noble-metal-free Cu-Fe-based photocatalytic water reduction system, the structural effects of the nitrogen ligands have been explored, including the steric and electronic effects of substituents at the 2,9- and 4,7-positions of phenanthroline. Ligands were prepared that led to increased hydrogen generation, with turnover numbers (TONCu) of up to 1388 being observed All the new complexes were electrochem. and photophys. characterized. We demonstrate for the first time that the presence of fluorine in nitrogen ligands increases the efficacy of copper complexes in photocatalytic hydrogen production The experimental part of the paper was very detailed, including the reaction process of 4,7-Bis(4-bromophenyl)-1,10-phenanthroline(cas: 97802-08-9SDS of cas: 97802-08-9)

4,7-Bis(4-bromophenyl)-1,10-phenanthroline(cas: 97802-08-9) belongs to organobromine compounds.The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.SDS of cas: 97802-08-9

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Selective Capture of Thallium and Cesium by a Cryptophane Soluble at Neutral pH》 was written by Brotin, Thierry; Berthault, Patrick; Pitrat, Delphine; Mulatier, Jean-Christophe. Reference of Benzyl 2-bromoacetateThis research focused onwater soluble cryptophane preparation Thallium Cesium capture complexation. The article conveys some information:

We report in this article the synthesis of an asym. cryptophane derivative (possessing only C3-symmetry) bearing three phenol groups and three other carboxylic acid functions, each of these groups on the aromatic rings. Thanks to isothermal titration calorimetry experiments, we show that this compound binds large monovalent cations, such as Cs+ and Tl+, with a binding constant significantly lower than its congeners bearing a larger number of phenol groups grafted on the benzene rings. However, higher selectivity for Cs+ and Tl+ was observed with this compound since it does not show any affinity for other alkali cations. More importantly, due to the greater solubility of this derivative in pure water, we show for the first time that effective thallium(I) complexation takes place at neutral pH. This result demonstrates that cryptophane derivatives decorated with a higher number of phenol groups are promising host mols. for removing traces of thallium(I) from aqueous phases at neutral pH or above. The results came from multiple reactions, including the reaction of Benzyl 2-bromoacetate(cas: 5437-45-6Reference of Benzyl 2-bromoacetate)

Benzyl 2-bromoacetate(cas: 5437-45-6) has been used in the alkylation of (-)-2,3-O-isopropylidene-D-threitol that afforded lipopeptide, 2-[(4R,5R)-5-({[(9H-fluoren-9-yl)methoxy]carbonylaminomethyl}-2,2-dimethyl-1,3-dioxolan-4-yl)methoxy]acetic acid.Reference of Benzyl 2-bromoacetate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Guowei; Jiang, Timing; Li, Sen; Hou, Huijie; Xiao, Keke; Hu, Jingping; Liang, Sha; Liu, Bingchuan; Yang, Jiakuan published an article in 2021. The article was titled 《Occurrence and exposure risk evaluation of polyhalogenated carbazoles (PHCZs) in drinking water》, and you may find the article in Science of the Total Environment.Related Products of 6825-20-3 The information in the text is summarized as follows:

Although polyhalogenated carbazoles (PHCZs) can be generated and detected in drinking water, their occurrence and potential health risks to humans via drinking water ingestion are not well known. In this study, 11 PHCZs were screened in drinking water samples from Wuhan, the most populous city in central China. The total concentration of PHCZs could be up to 53.48 ng/L with a median level of 8.19 ng/L, which was comparable to polychlorinated biphenyls and poly- and perfluoroalkyl substances reported in the literatures for drinking water. Composition profiles revealed that 3,6-dichlorocarbazole, 3-chlorocarbazole, 3-bromocarbazole and 3,6-dibromocarbazole were the predominant PHCZ congeners in the tested samples. Regional differences in the levels and patterns of PHCZs suggested that anthropogenic releases should be the dominant source compared to natural generation. Potential health risks associated to the levels of PHCZs in drinking water were assessed using the toxic equivalent (TEQs) method. The estimated daily intake of PHCZs via drinking water ingestion is up to 0.38 pg-TEQ/kg body weight/day for infants, nearly 4.5 times higher than that for adults, and appears to reach the maximum permissible concentration set by certain authority agencies. Overall, drinking water ingestion represents an important exposure pathway for PHCZs. This is the first comprehensive study on the abundance and health risks of PHCZs in drinking water. In the experiment, the researchers used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Related Products of 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 in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Related Products of 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhou, Guojun; Ren, Qiqiong; Molokeev, Maxim S.; Zhou, Yayun; Zhang, Jian; Zhang, Xian-Ming published an article in 2021. The article was titled 《Unraveling the Ultrafast Self-assembly and Photoluminescence in Zero-Dimensional Mn2+-Based Halides with Narrow-Band Green Emissions》, and you may find the article in ACS Applied Electronic Materials.Application of 1530-32-1 The information in the text is summarized as follows:

The discovery of narrow-band luminescent materials remains an immense challenge to optimize the performance of white light-emitting diodes (LEDs). So far, the zero-dimensional (0D) Mn2+-based halides with near-unity narrow-band emissions have emerged as a class of promising phosphors in solid-state displays, but the related large-scale synthesis strategies have not been proposed and evaluated. Herein, we report an in situ synthetic process of 0D Mn2+-based halides and utilize (C20H20P)2MnBr4 as a case to investigate the photoluminescence characteristics and the structural essence of ultrafast self-assembly. The bright green emission peak at 523 nm with a full width at half maximum of 48 nm for (C20H20P)2MnBr4 is attributed to the d-d transition (4T1-6A1) of tetrahedrally coordinated [MnBr4]2- centers, and the fabricated white LED device shows a wide color gamut of 103.7% National Television System Committee (NTSC) standard Remarkably, the exptl. and theor. results indicate that there are hydrogen bonding of C-H···Br and weak van der Waals interactions between [C20H20P]+ and [MnBr4]2-, resulting in the root for the realization of ultrafast self-assembly in 0D Mn2+-based halides. This work reveals a feasible and general synthesis method for preparing 0D Mn2+-based halides, thereby providing a possibility for their industrial application in solid-state displays. The experimental part of the paper was very detailed, including the reaction process of Ethyltriphenylphosphonium bromide(cas: 1530-32-1Application 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. CatOnium ETPB is also used as catalysts in the synthesis of certain organic compounds.Application of 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Xuting; Fan, Lili; Xu, Ben; Shang, Yanxue; Li, Mengfei; Zhang, Ling; Liu, Shuo; Kang, Zixi; Liu, Zhanning; Lu, Xiaoqing; Sun, Daofeng published an article in 2021. The article was titled 《Single-Atom-like B-N3 Sites in Ordered Macroporous Carbon for Efficient Oxygen Reduction Reaction》, and you may find the article in ACS Applied Materials & Interfaces.Reference of Tris(4-bromophenyl)amine The information in the text is summarized as follows:

On the premise of cleanliness and stability, improving the catalytic efficiency for the oxygen reduction reaction in the electrode reaction of fuel cells and metal-air batteries is of vital importance. Studies have shown that heteroatom doping and structural optimization are efficient strategies. Herein, a single-atom-like B-N3 configuration in carbon is designed for efficient oxygen reduction reaction catalysis inspired by the extensively studied transition metal M-Nx sites, which is supported on the ordered macroporous carbon prepared by utilizing a hydrogen-bonded organic framework as carbon and nitrogen sources and SiO2 spheres as a template. The co-doping of B/N and ordered macroporous structures promote the metal-free material high oxygen reduction catalytic performance in alk. media. DFT calculations reveal that the B-N3 structure played a key role in enhancing the oxygen reduction activity by providing rich favorable *OOH and *OH adsorption sites on the B center. The promoted formation of *OH/*OOH intermediates accelerated the electrocatalyst reaction. This study provides new insights into the design of single-atom-like nonmetallic ORR electrocatalysts and synthesis of ordered macroporous carbons based on hydrogen-bonded organic frameworks. The results came from multiple reactions, including the reaction of Tris(4-bromophenyl)amine(cas: 4316-58-9Reference of Tris(4-bromophenyl)amine)

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

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hwang, Nicky; Sun, Liren; Noe, Daisy; Lam, Patrick Y. S.; Zhou, Tianlun; Block, Timothy M.; Du, Yanming published an article in 2021. The article was titled 《Hepatoselective Dihydroquinolizinone Bis-acids for HBsAg mRNA Degradation》, and you may find the article in ACS Medicinal Chemistry Letters.Reference of Ethyl 5-bromovalerate The information in the text is summarized as follows:

Chronic hepatitis B (CHB) is characterized by high levels of hepatitis B virus (HBV) surface antigen (HBsAg) in blood circulation. A major goal of CHB interventions is reducing or eliminating this antigenemia; however, there are currently no approved methods that can do this. A novel family of compounds with a dihydroquinolizinone (DHQ) scaffold has been shown to reduce circulating levels of HBsAg in animals, representing a first for a small mol. Reductions of HBsAg were a result of the compound’s effect on HBsAg mRNA levels. However, com. development by Roche of a DHQ lead compound, RG-7834, was stopped due to undisclosed toxicity issues. Herein we report our effort to convert the systemic RG7834 compound to a hepatoselective DHQ analog to limit its distribution to the bloodstream and thus to other body tissues. The experimental process involved the reaction of Ethyl 5-bromovalerate(cas: 14660-52-7Reference of Ethyl 5-bromovalerate)

Ethyl 5-bromovalerate(cas: 14660-52-7) 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.Reference of Ethyl 5-bromovalerate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary