Category: bromides-buliding-blocks

Quality Control of EthylbromofluoroacetateOn March 18, 2022, Lu, Dengfu; Li, Yadong; Wang, Peng; Wang, Zijie; Yang, Daoyi; Gong, Yuefa published an article in ACS Catalysis. The article was 《Cu-Catalyzed C(sp3)-N Coupling and Alkene Carboamination Enabled by Ligand-Promoted Selective Hydrazine Transfer to Alkyl Radicals》. The article mentions the following:

In this work, di-tert-Bu hydrazodiformate was found to be a unique effective amination reagent in Cu-catalyzed C(sp3)-N bond formation reactions that involve alkyl radical intermediates. This method was applicable to both electron-deficient and electron-rich radicals, and were able to achieve the direct C-N coupling of activated bromides, as well as the carboamination of general alkenes based on this chem. Mechanistic studies suggested that the hydrazodiformate forms a reducing dinuclear complex with Cu and the ligand which, upon 1e-oxidation, turns into an open-shell species with the major spin d. on N atoms. With the assistance of a ligand, this species can selectively deliver the hydrazine moiety onto an alkyl radical (prior to halide transfer), leading to the formation of a C(sp3)-N bond. The products obtained with this amination method could be easily deprotected to afford alkyl hydrazines and further derived to primary amines or N-heterocycles. In the experiment, the researchers used many compounds, for example, Ethylbromofluoroacetate(cas: 401-55-8Quality Control 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.Quality Control of Ethylbromofluoroacetate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Related Products of 29102-67-8On March 31, 2000, Cheng, Ge; Gan, Qiu; Wang, Yuechuan; Xie, Minggui published an article in Huaxue Shijie. The article was 《Synthesis of symmetrical bromo-1,3,5-triphenylbenzenes》. The article mentions the following:

1,3,5-Tri(3-bromophenyl)benzene and 1,3,5-tri(3,5-dibromophenyl)benzene were synthesized from m-bromoacetophenone and 3,5-dibromoacetophenone, resp., in the presence of SiCl4 in ethanol. The yield of 1,3,5-tri(3-bromophenyl)benzene was 74%, and that of 1,3,5-tri(3,5-dibromophenyl)benzene was 40%. The products were identified by UV, MS, IR, and 1H NMR. The yields can be improved by increasing the amount of SiCl4 or decreasing that of ethanol. In the experimental materials used by the author, we found 3,3”,5,5”-Tetrabromo-5′-(3,5-dibromophenyl)-1,1′:3′,1”-terphenyl(cas: 29102-67-8Related Products of 29102-67-8)

3,3”,5,5”-Tetrabromo-5′-(3,5-dibromophenyl)-1,1′:3′,1”-terphenyl(cas: 29102-67-8) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals.Related Products of 29102-67-8 The most pervasive is the naturally produced bromomethane.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《TBAB-catalyzed 1,6-conjugate sulfonylation of para-quinone methides: a highly efficient approach to unsymmetrical gem-diarylmethyl sulfones in water》 was written by Liu, Zhang-Qin; You, Peng-Sheng; Zhang, Liang-Dong; Liu, Da-Qing; Liu, Sheng-Shu; Guan, Xiao-Yu. Application of 6630-33-7This research focused onunsym gem diarylmethyl sulfone preparation regioselective water green chem; para quinone methide sulfonyl hydrazine conjugate sulfonylation TBAB catalyst; green and sustainable chemistry; sulfa-1,6-conjugated addition; synthesis in water; unsymmetrical diarylmethyl sulfones. The article conveys some information:

A highly efficient sulfonylation of para-quinone methides with sulfonyl hydrazines in water has been developed on the basis of the mode involving a tetra-Bu ammonium bromide (TBAB)-promoted sulfa-1,6-conjugated addition pathway. This reaction provides a green and sustainable method to synthesize various unsym. diarylmethyl sulfones, showing good functional group tolerance, scalability, and regioselectivity. Further transformation of the resulting diarylmethyl sulfones provides an efficient route to some functionalized mols. The experimental process involved the reaction of o-Bromobenzaldehyde(cas: 6630-33-7Application of 6630-33-7)

o-Bromobenzaldehyde(cas: 6630-33-7) is used in L-threonine aldolase-catalyzed enantio/diastereoselective aldol reactions.Application of 6630-33-7It is also used in L-threonine aldolase-catalyzed enantio and diastereoselective aldol reactions. Further, it reacts with trichloromethane to prepare 1-(2-bromo-phenyl)-2,2,2-trichloro-ethanol.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Direct Triple Annulations: A Way to Design Large Triazastarphenes with Intertwined Hexagonal Packing》 was written by Li, Qian; Moussallem, Chady; Castet, Frederic; Muccioli, Luca; Dourges, Marie-Anne; Toupance, Thierry; Nicolas, Yohann. COA of Formula: C9H11BrO3This research focused ontriazastarphene preparation charge transport intertwined hexagonal packing. The article conveys some information:

A new straightforward synthetic strategy was elaborated to achieve star-shaped triazatrinaphthylene and, for the first time, triazatrianthrylene derivatives I [R = Ph, 4-MeC6H4] and II [R1 = C=CSi(i-Pr)3, Ph, 3, 4,5-tri-MeOC6H2, etc.]. Their solution- and solid-state properties were thoroughly characterized by cyclic voltammetry, UV-vis absorption spectroscopy, X-ray diffraction, and d. functional theory calculations Original hexagonal mol. arrangements were found in the crystal phase, which opens a new pathway for designing materials with improved three-dimensional charge-transport properties. In the experiment, the researchers used many compounds, for example, 1-Bromo-3,4,5-trimethoxybenzene(cas: 2675-79-8COA of Formula: C9H11BrO3)

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.COA of Formula: C9H11BrO31-Bromo-3,4,5-trimethoxybenzene can be used to synthesize analogs of HA14-1, which shows promising anticancer properties.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

HPLC of Formula: 7073-94-1In 2020 ,《C-H Arylation of Thiophenes with Aryl Bromides by a Parts-per-Million Loading of a Palladium NNC-Pincer Complex》 was published in Synlett. The article was written by Purta, Anggi Eka; Ichii, Shun; Tazawa, Aya; Uozumi, Yasuhiro. The article contains the following contents:

A palladium NNC-pincer complex efficiently catalyzed the direct arylation of thiophene derivatives with extremely low palladium loadings of the order of ppm. Thus, the reaction of various thiophenes with aryl bromides in the presence of 25-100 mol ppm of chlorido[(2-phenyl-κ- C2)-9-phenyl-1,10-phenanthroline-κ2-N,N’]palladium(II) NNC-pincer complex, K 2CO3 and pivalic acid in N,N-dimethylacetamide afforded the corresponding 2- or 5-arylated thiophenes I [R1 = H, 5-Cl, 5-Me; Ar = Ph, 4-MeC6H4, 1-naphthyl, etc.] and II [R = 2-Cl, 2-Me, 2-Ph-3-Me, etc.; Ar = 4-MeC6H4] in good to excellent yields. A combination of the present C-H arylation and Hiyama coupling with the same NNC-pincer complex provided an efficient synthesis of unsym. 2,5-thiophenes II [R = 2-(4-MeOC6H4), 2-(4-F3CC6H4); Ar = 4-MeC6H4] with catalyst loadings at mol ppm levels. In the experiment, the researchers used 1-Bromo-2-isopropylbenzene(cas: 7073-94-1HPLC of Formula: 7073-94-1)

1-Bromo-2-isopropylbenzene(cas: 7073-94-1) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Alkyl bromides are mainly used as alkylating agents and also find application as a solvent to extract oil from seeds and wool. HPLC of Formula: 7073-94-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Formula: Br3InIn 2020 ,《In Situ Transmission Electron Microscopy Measurements of Ge Nanowire Synthesis with Liquid Metal Nanodroplets in Water》 was published in ACS Nano. The article was written by Cheek, Quintin; Fahrenkrug, Eli; Hlynchuk, Sofiya; Alsem, Daan Hein; Salmon, Norman J.; Maldonado, Stephen. The article contains the following contents:

The growth of Ge nanowires in water inside a liquid transmission electron microscope (TEM) holder has been demonstrated at room temperature Each nanowire growth event was stimulated by the incident electron beam on otherwise unsupported liquid Ga or liquid In nanodroplets. A variety of conditions were explored, including liquid metal nanodroplet surface condition, liquid metal nanodroplet size and d., formal concentration of dissolved GeO2, and electron beam intensity. The cumulative observations from a series of videos recorded during growth events suggested the following points. First, the conditions necessary for initiating nanowire growth at uncontacted liquid metal nanodroplets in a liquid TEM cell indicate the process was governed by solvated electrons generated from secondary electrons scattered by the liquid metal nanodroplets. The attained current densities were comparable to those achieved in conventional electrochem. liquid-liquid-solid (ec-LLS) growths outside of a TEM. Second, the surface condition of the liquid metal nanodroplets was quite influential on whether nanowire growth occurred and surface diffusion of Ge adatoms contributed to the rate of crystallization Third, the Ge nanowire growth rates were limited by the feed rate of Ge to the crystal growth front rather than the rate of crystallization at the liquid metal/solid Ge interface. Estimates of an electrochem. current for the reduction of dissolved GeO2 were nominally in line with currents used for Ge nanowire growth by ec-LLS outside of the TEM. Fourth, the Ge nanowire growths in the liquid TEM cell occurred far from thermodn. equilibrium, with supersaturation values of 104 prior to nucleation. These collective points provide insight on how to further control and improve Ge nanowire morphol. and crystallog. quality by the ec-LLS method.Indium(III) bromide(cas: 13465-09-3Formula: Br3In) was used in this study.

Indium(III) bromide(cas: 13465-09-3) is used as a catalyst to produce dithioacetals when unactivated alkynes react with thiols and fields such as optics and microelectronics that utilize semiconductor technology have wide uses for indium in high-performing solar cells.Formula: Br3In

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Formula: C12H7Br2NIn 2022 ,《Occurrence and distribution of polyhalogenated carbazoles in eastern Tibetan Plateau soils along the slope of Mt. Qionglai》 appeared in Chemosphere. The author of the article were Liu, Mingkai; Huang, Longhua; Li, Xiaoshuang; Liu, Fei; Zhang, Wei; Wang, Zhe; Xu, Yan; Ke, Runhui; He, Hongping; Lou, Yinghua. The article conveys some information:

Polyhalogenated carbazoles (PHCZs), are considered as potential persistent organic pollutants (POPs), which have been frequently detected in the environment. However, the altitudinal distribution characteristics and possible sources of PHCZs in high mountain soils are still unknown. The present study was the first to analyze PHCZs in soil samples collected along the eastern slope of Mt. Qionglai (MQ), the east edge of the Tibetan Plateau. The concentration of ΣPHCZs (based on dry weight) ranges from 14.4 to 107 ng/g (median value of 40.9), which was at high end of the range reported in soils and sediments to date in the literature. The composition profiles of PHCZs in the soils of MQ were dominated by 3,6-dichlorocarbazole (36-CCZ), 3-chlorocarbazole (3-CCZ), and 2-bromocarbazole (2-BCZ). The mean TOC-normalized concentrations of ΣPHCZs in soil samples from below-treeline (2092 ng/g TOC) were higher than those from alpine meadow (1124 ng/g TOC), probably due to the forest filter effect. The decreasing trend of the PHCZs TOC-normalized concentrations with altitude shows that accumulation of PHCZs from the alpine meadow samples was not affected by the mountain cold-trapping effect. Significantly pos. correlations were observed between the concentrations of more than half of detected PHCZ congeners and TOC. In addition, PHCZs show the potential to represent a class of POPs with the frequent occurrence and wide distribution, as the abundance and environmental behavior of PHCZs are similar to some POPs in MQ. In the experimental materials used by the author, we found 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Formula: C12H7Br2N)

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.Formula: C12H7Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Bonfant, Giulia; Balestri, Davide; Perego, Jacopo; Comotti, Angiolina; Bracco, Silvia; Koepf, Matthieu; Gennari, Marcello; Marchio, Luciano published an article in ACS Omega. The title of the article was 《Phosphine Oxide Porous Organic Polymers Incorporating Cobalt(II) Ions: Synthesis, Characterization, and Investigation of H2 Production》.COA of Formula: C8H8Br2 The author mentioned the following in the article:

Suitably functionalized porous matrixes represent versatile platforms to support well-dispersed catalytic centers. In the present study, porous organic polymers (POPs) containing phosphine oxide groups were fabricated to bind transition metals and to be investigated for potential electrocatalytic applications. Crosslinking of mono- and di-phosphine monomers with multiple Ph substituents was subject to the Friedel-Crafts (F-C) reaction and the oxidation process, which generated phosphine oxide porous polymers with pore capacity up to 0.92 cm3/g and a surface area of about 990 m2/g. The formation of the R3P·BH3 borohydride adduct during synthesis allows to extend the library of phosphine-based monomeric entities when using FeCl3. The porous polymers were loaded with 0.8-4.2 weight/weight % of cobalt(II) and behaved as hydrogen evolution reaction (HER) catalysts with a Faradaic efficiency of up to 95% (5.81 x 10-5 mol H2 per 11.76 C) and a stable c.d. during repeated controlled potential experiments (CPE), even though with high overpotentials (0.53-0.68 V to reach a c.d. of 1 mA·cm-2). These studies open the way to the effectiveness of tailored phosphine oxide POPs produced through an inexpensive and ecofriendly iron-based catalyst and for the insertion of transition metals in a porous architecture, enabling electrochem. driven activation of small mols. The experimental part of the paper was very detailed, including the reaction process of 1,4-Bis(bromomethyl)benzene(cas: 623-24-5COA of Formula: C8H8Br2)

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. Moreover, several studies demonstrate that the average proportion of bromine in drugs is significantly higher than that in natural products. COA of Formula: C8H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Zhang, Hongquan; Wen, Chunxi; Li, Bingting; Yan, Xinlin; Xu, Yangrong; Guo, Jialin; Hou, Shi; Chang, Jiajia; Li, Song; Xiao, Junhai published an article in Molecules. The title of the article was 《Phenoxyaromatic Acid Analogues as Novel Radiotherapy Sensitizers: Design, Synthesis and Biological Evaluation》.Formula: C6H5Br2N The author mentioned the following in the article:

Radiotherapy is a vital approach for brain tumor treatment. The standard treatment for glioblastoma (GB) is maximal surgical resection combined with radiotherapy and chemotherapy. However, the non-sensitivity of tumor cells in the hypoxic area of solid tumors to radiotherapy may cause radioresistance. Therefore, radiotherapy sensitizers that increase the oxygen concentration within the tumor are promising for increasing the effectiveness of radiation. Inspired by Hb allosteric oxygen release regulators, a series of novel phenoxyacetic acid analogs were designed and synthesized. A numerical method was applied to determine the activity and safety of newly synthesized compounds In vitro studies on the evaluation of red blood cells revealed that compounds 19c (ΔP50 = 45.50 mmHg) and 19t (ΔP50 = 44.38 mmHg) improve the oxygen-releasing property effectively compared to pos. control efaproxiral (ΔP50 = 36.40 mmHg). Preliminary safety evaluation revealed that 19c exhibited no cytotoxicity towards HEK293 and U87MG cells, while 19t was cytotoxic toward both cells with no selectivity. An in vivo activity assay confirmed that 19c exhibited a radiosensitization effect on orthotopically transplanted GB in mouse brains. Moreover, a pharmacokinetic study in rats showed that 19c was orally available. In the part of experimental materials, we found many familiar compounds, such as 3,5-Dibromoaniline(cas: 626-40-4Formula: C6H5Br2N)

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime. To avoid the problem of multiple alkylation, methods have been devised for “blocking” substitution so that only one alkyl group is introduced. The Gabriel synthesis is one such method; it utilizes phthalimide, C6H4(CO)2NH, whose one acidic hydrogen atom has been removed upon the addition of a base such as KOH to form a salt.Formula: C6H5Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Trunks, Thomas M.; Babra, Jasraj Singh; Westwood, James; Smith, Christopher D. published an article in SynOpen. The title of the article was 《A Homocoupling Approach to the Key Dione of CyMe 4-BTPhen-Vital Ligands for Nuclear Clean-Up by the SANEX Process》.Safety of Ethyl 3-bromopropanoate The author mentioned the following in the article:

The synthesis of the CyMe4 fragment beginning from readily available hydroxypivalic acid. It featured a cobalt-catalyzed homocoupling of a neopentyl bromide to provided the key bisester precursor, thereby avoiding the requirement for tech. challenging low-temperature LDA-mediated aldol chemistries. In the part of experimental materials, we found many familiar compounds, such as Ethyl 3-bromopropanoate(cas: 539-74-2Safety of Ethyl 3-bromopropanoate)

Ethyl 3-bromopropanoate(cas: 539-74-2) 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. Safety of Ethyl 3-bromopropanoate Moreover, several studies demonstrate that the average proportion of bromine in drugs is significantly higher than that in natural products.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary