Month: September 2022

One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine. 1575-37-7, formula is C6H7BrN2, Name is 4-Bromobenzene-1,2-diamine, Formula: C6H7BrN2

Dusold, Carolin;Haines, Philipp;Platzer, Benedikt;Guldi, Dirk M.;Hirsch, Andreas research published 《 Helically and Linearly Fused Rylenediimide-Hexabenzocoronenes》, the research content is summarized as follows. Perylene- as well as naphthalenediimides were fused to hexabenzocoronenes (HBCs) at their imide position to realize highly π-extended donor-acceptor (D-A)-hybrids. Successful isomer separation in the first step was decisive to guarantee a straightforward synthetic sequence. Hexaphenylbenzenes as precursors were accessed via Diels-Alder reactions and reacted in a Scholl oxidation to yield the resp. HBC derivatives The fully conjugated benzimidazole linker, which separates the electron donating HBC from the electron accepting rylenediimide, enabled the formation of either a linear or a helical configuration. Largely different chem., phys., and optoelec. characteristics were noted for the two configurations. What stood out was their aggregation and their excited state deactivation depending on the solvent polarity. Results from global anal. of the femtosecond transient absorption data corroborated the formation of a charge-transfer (CT) state that is stabilized in the helically fused configuration relative to the linear analog. However, a comparison with spectroelectrochem. experiments failed to disclose evidence for a charge-separated (CS) state.

Formula: C6H7BrN2, 4-Bromo-1,2-diaminobenzene can be obtained from 1,2-diaminobenzene via acetylation followed by bromination and alkaline hydrolysis.
4-Bromobenzene-1,2-diamine, also known as 4-Bromobenzene-1,2-diamine, is a useful research compound. Its molecular formula is C6H7BrN2 and its molecular weight is 187.04 g/mol. The purity is usually 95%.
4-Bromo-1,2-diaminobenzene is a dye that is used in diagnostic
procedures to detect the presence of amide groups. 4-Bromo-1,2-diaminobenzene can be used as an inhibitor for cationic polymerization reactions. It also has tuberculostatic activity and inhibits the growth of Mycobacterium tuberculosis. This compound reacts with aniline to form a benzimidazole derivative that contains a reactive amine group. The reaction between this amine group and different electrophiles generates benzimidazole compounds with different properties that are useful in nucleophilic attack reactions. The reaction between 4-bromo-1,2-diaminobenzene and methyl ethyl sulfide produces a luminescent probe that can be used to detect hydrogen bonds., 1575-37-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Organobromine compounds, also called organobromides, are organic compounds that contain carbon bonded to bromine. 19111-87-6, formula is C18H11Br, The most pervasive is the naturally produced bromomethane. Reference of 19111-87-6

Carmichael, Ian;Hug, Gordon L. research published 《 Triplet-triplet absorption spectra of organic molecules in condensed phases.》, the research content is summarized as follows. A review in which a compilation is given of spectral parameters associated with triplet-triplet absorption of organic mols. in condensed media. The wavelengths of maximum absorbance and the corresponding extinction coefficients, where known, were critically evaluated. Other data, for example, lifetimes, energies, and energy transfer rates, relevant to the triplet states of these mols., are included by way of comments, but have not been subjected to a similar scrutiny. An introduction is given to triplet state processes in solution and solids, developing the conceptual background and offering a historical perspective on the detection and measurement of triplet state absorption. Techniques employed to populate the triplet state are reviewed and the various approaches to the estimation of the extinction coefficient of tripley-triplet absorption are discussed. A statistical anal. of the available data is presented and recommendations for a hierarchical choice of extinction coefficients are made. Data collection is expected to be complete through the end of 1984.

19111-87-6, 2-Bromotriphenylene is a useful research compound. Its molecular formula is C18H11Br and its molecular weight is 307.2 g/mol. The purity is usually 95%.
2-Bromotriphenylene is a brominating agent that has the ability to react with sodium carbonate and emit light. The luminescence of 2-bromotriphenylene can be used as an indicator of the degree of dilution, or how much water is present in a solution. It also emits light when it reacts with chloride ions in a reaction solution. 2-Bromotriphenylene can be used as a polymer matrix to form polymeric films, which are then used as catalysts for organic reactions. The luminescence properties of 2-bromotriphenylene make it suitable for use in functional theory experiments. This chemical compound is relatively low cost, and has been shown to have high yield in catalysis., Reference of 19111-87-6

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Organic compounds having carbon bonded to bromine are called organic bromides. 5392-10-9, formula is C9H9BrO3, Name is 2-Bromo-4,5-dimethoxybenzaldehyde. Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Category: bromides-buliding-blocks.

Zhou, Liwei;Qiao, Shujia;Zhou, Fengru;Xuchen, Xinyu;Deng, Guobo;Yang, Yuan;Liang, Yun research published 《 α-Oxocarboxylic Acids as Three-Carbon Insertion Units for Palladium-Catalyzed Decarboxylative Cascade Synthesis of Diverse Fused Heteropolycycles》, the research content is summarized as follows. A novel palladium-catalyzed decarboxylative cascade cyclization for the assembly of diverse fused heteropolycycles by employing α-oxocarboxylic acids as three-carbon insertion units is reported. This protocol enables the synthesis of isoquinolinedione- and indolo[2,1-a]isoquinolinone-fused benzocycloheptanones in moderate to good yields by the use of different aryl iodides, including alkene-tethered 2-iodobenzamides and 2-(2-iodophenyl)-1H-indoles. Notably, the approach achieves simultaneous construction of both six- and seven-membered rings via sequential intramol. carbopalladation, C-H activation, and decarboxylation.

5392-10-9, 2-Bromo-4,5-dimethoxybenzaldehyde is a useful research compound. Its molecular formula is C9H9BrO3 and its molecular weight is 245.07 g/mol. The purity is usually 95%.
2-Bromo-4,5-dimethoxybenzaldehyde is a synthetic compound that has been shown to be an effective agent for inducing apoptosis in leukemia cells. It is an efficient method for synthesizing the compound and ha2-Bromo-4,5-dimethoxybenzaldehyde induces cell death by topoisomerase-mediated DNA cleavage, which results in chromosomal fragmentation and high levels of reactive oxygen species in the cell., Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Organobromine compounds, also called organobromides, are organic compounds that contain carbon bonded to bromine. 402-49-3, formula is C8H6BrF3, The most pervasive is the naturally produced bromomethane. Electric Literature of 402-49-3

Yin, Wenbo;Cui, Hengxian;Jiang, Hong;Zhang, Yuxin;Liu, Lei;Wu, Tianxiao;Sun, Yin;Zhao, Liyu;Su, Xin;Zhao, Dongmei;Cheng, Maosheng research published 《 Broadening antifungal spectrum and improving metabolic stablity based on a scaffold strategy: Design, synthesis, and evaluation of novel 4-phenyl-4,5-dihydrooxazole derivatives as potent fungistatic and fungicidal reagents》, the research content is summarized as follows. 5-Phenylthiophene derivatives exhibited excellent antifungal activity against Candida albicans, Candida tropicalis and Cryptococcus neoformans. However, optimal compound II was inactive against Aspergillus fumigatus and unstable in human liver microsomes in vitro with a half-life of 18.6 min. To discover antifungal agents with a broad spectrum and improve the metabolic properties of the compounds, the scaffold hopping strategy was adopted and a series of I [R² = 3-Me, 2-Et, 2-iso-Pr, etc.,] were designed and synthesized. It was especially encouraging that compound I [R = 2-F] displayed significant antifungal activities against eight susceptible strains and seven FLC-resistant strains. Furthermore, the potent compound I [R = 2-F] could prevent the formation of fungalbiofilms and displayed satisfactory fungicidal activity. In addition, the metabolic stability of compound I [R = 2-F] was improved significantly, with the half-life of 70.5 min. Compound I [R = 2-F] was almost nontoxic to mammalian A549, MCF-7, HepG2, and 293T cells. Moreover, pharmacokinetic studies in SD rats showed that compound I [R = 2-F] exhibited pharmacokinetic properties with a bioavailability of 15.22% and a half-life of 4.44 h, indicating that compound I [R = 2-F] is worthy of further study.

402-49-3, 4-Trifluoromethylbenzyl bromide is a useful research compound. Its molecular formula is C8H6BrF3 and its molecular weight is 239.03 g/mol. The purity is usually 95%.
4-Trifluoromethylbenzyl bromide is a choline derivative that acts as an anticancer agent. It is structurally similar to the anticancer drug doxorubicin, which has been shown to be effective against breast cancer and leukemia. 4-Trifluoromethylbenzyl bromide interacts with cellular proteins, including choline kinase, and inhibits the mitochondrial pathway. This leads to cell death through apoptosis. The molecule also interacts with nucleotide bases such as thymine and cytosine in DNA, inhibiting transcription and replication. 4-Trifluoromethylbenzyl bromide binds strongly to the hydroxyl group of cholesterol by an electrophilic substitution mechanism to form a covalent bond with its hydroxy group. The molecule can also bind to chloride ions by an ionic bond., Electric Literature of 402-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. 629-04-9, formula is C7H15Br, Name is 1-Bromoheptane. Organobromine compounds have fallen under increased scrutiny for their environmental impact., Category: bromides-buliding-blocks.

Nakum, Kiran J.;Katariya, Kanubhai D.;Hagar, Mohamed;Jadeja, Rajendrasinh N. research published 《 The influence of lateral hydroxyl group and molecular flexibility on the mesogenic behavior of a new homologous series based on thiophene-chalcone: Synthesis, characterization, crystal structure and DFT study》, the research content is summarized as follows. A new homologous series of rod shaped calamite liquid crystals, I [R = Et, decyl, octadecyl, etc.] based on thiophene-chalcone was prepared by condensation of 2-hydroxy-4-n-alkoxybenzaldehydes (n = 2 to 8, 10, 12, 14, 16, 18) with (E)-1-(4-aminophenyl)-3-(thiophen-2-yl)prop-2-en-1-one. FT-IR, ¹H NMR, ¹³C NMR and mass spectroscopy were used to characterize synthesized compds I. The liquid crystal behavior of all synthetic compounds I was investigated using Differential Scanning Calorimeter (DSC) and Polarizing Optical Microscope (POM). Lower members of the homologous series, n-heptyloxy to n-dodecyloxy , were nematogenic, and higher members, n-tetradecyloxy to n-octadecyloxy , were smectogenic, whereas n-ethoxy to n-pentyloxy derivatives were non-mesogenic, and n-hexyloxy exhibited monotropic nematic phase. The n-pentyloxy derivative crystallized under monoclinic, space group P2/c with unit cell dimensions a = 16.1723(9) Å, b = 5.8603(3) Å, c = 22.4320(12) Å, β = 100.153(2) , V = 2092.69(9) Å3. The ethoxy derivative was subjected to DFT (d. functional theory) level computations and complete geometric optimization utilizing B3LYP/6-311G (d, p) basis sets and results were compared with structurally similar compound

Category: bromides-buliding-blocks, 1-Bromoheptane is a useful research compound. Its molecular formula is C7H15Br and its molecular weight is 179.1 g/mol. The purity is usually 95%.
1-Bromoheptane is a reagent that is used for the preparation of alkylthiophienylzinc chloride.
1-Bromoheptane is a reactive compound that is used in the preparation of p-hydroxybenzoic acid, which is an intermediate in the synthesis of many natural compounds. 1-Bromoheptane has been shown to have biological properties and to inhibit mitochondrial membrane potential. It also causes cell lysis and hepatic steatosis in mice. This compound has been shown to inhibit the activity of enzymes such as acetylcholinesterase, butyrylcholinesterase, and carboxylesterase. 1-Bromoheptane can be used as a model for studying the effects on congestive heart failure by increasing cardiac workloads or decreasing myocardial contractility., 629-04-9.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Organic bromides such as alkyl bromides are used as fumigants in agriculture to control insects. 5445-17-0, formula is C4H7BrO2, Name is Methyl 2-bromopropanoate. Ethylene bromide is one of the commercially important organic bromides which are the component of leaded gasoline. Computed Properties of 5445-17-0.

Li, Xiaopei;Kato, Tatsuhisa;Nakamura, Yasuyuki;Yamago, Shigeru research published 《 The Effect of Viscosity on the Coupling and Hydrogen-Abstraction Reaction between Transient and Persistent Radicals》, the research content is summarized as follows. The effect of viscosity on the radical termination reaction between a transient radical and a persistent radical undergoing a coupling reaction (Coup) or hydrogen abstraction (Abst) was examined In a non-viscous solvent, such as benzene (bulk viscosity ηbulk < 1 mPa s), all the transient radicals studied exclusively coupled with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) with >99% Coup/Abst selectivity, but Coup/Abst decreased as the viscosity increased (89/11 in PEG400 at 25°C [ηbulk = 84 mPa s]). While bulk viscosity is a good parameter to predict the Coup/Abst selectivity in each solvent, microviscosity is the more general parameter. Poly(Me methacrylate) (PMMA)-end radicals had a more significant viscosity effect than polystyrene (PSt)-end radicals, and the Coup/Abst ratio of the former dropped to 50/50 in highly viscous media (ηbulk = 3980 mPa s), while the latter maintained high Coup/Abst selectivity (84/16). These results, together with the low thermal stability of dormant PMMA-TEMPO species compared with that of PSt-TEMPO species, are attributed to the limitation of the nitroxide-mediated radical polymerization of MMA. While both organotellurium and bromine compounds were used as precursors of radicals, the former was superior to the latter for the clean generation of radical species. The effect of viscosity on the radical termination reaction between a transient radical and a persistent radical undergoing a coupling reaction (Coup) or hydrogen abstraction (Abst) was examined In a non-viscous solvent, such as benzene (bulk viscosity ηbulk < 1 mPa s), all the transient radicals studied exclusively coupled with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) with >99% Coup/Abst selectivity, but Coup/Abst decreased as the viscosity increased (89/11 in PEG400 at 25°C [ηbulk = 84 mPa s]). While bulk viscosity is a good parameter to predict the Coup/Abst selectivity in each solvent, microviscosity is the more general parameter. Poly(Me methacrylate) (PMMA)-end radicals had a more significant viscosity effect than polystyrene (PSt)-end radicals, and the Coup/Abst ratio of the former dropped to 50/50 in highly viscous media (ηbulk = 3980 mPa s), while the latter maintained high Coup/Abst selectivity (84/16). These results, together with the low thermal stability of dormant PMMA-TEMPO species compared with that of PSt-TEMPO species, are attributed to the limitation of the nitroxide-mediated radical polymerization of MMA. While both organotellurium and bromine compounds were used as precursors of radicals, the former was superior to the latter for the clean generation of radical species.

5445-17-0, Methyl 2-bromopropionate, also known as Methyl 2-bromopropionate, is a useful research compound. Its molecular formula is C4H7BrO2 and its molecular weight is 167 g/mol. The purity is usually 95%.
Methyl 2-bromopropionate is used in the synthesis of poly(ADP-Ribose)polymerase inhibitors derived from benzoxazin-3-one. Also used in the synthesis of 5-HT2C antagonists affecting serotonin levels.
Methyl 2-bromopropanoate is a chemical compound that can be synthesized in an asymmetric manner. The reaction of methyl 2-bromopropanoate with hydrochloric acid gives the corresponding carboxylic acid, methyl propanoate, and hydrogen bromide in a 1:1 ratio. It has been shown that methyl 2-bromopropanoate is a potential catalyst for the reduction of chloride to chloride ion via the borohydride reduction method. Methyl 2-bromopropanoate has also been used as a model system for studying halides and copper complexes. Magnetic resonance spectroscopy studies have revealed that this chemical compound has a high redox potential and kinetic properties., Computed Properties of 5445-17-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Organic bromides such as alkyl bromides are used as fumigants in agriculture to control insects. 90-59-5, formula is C7H4Br2O2, Name is 3,5-Dibromo-2-hydroxybenzaldehyde. Ethylene bromide is one of the commercially important organic bromides which are the component of leaded gasoline. Related Products of 90-59-5.

Kargar, Hadi;Ardakani, Amir Adabi;Tahir, Muhammad Nawaz;Ashfaq, Muhammad;Munawar, Khurram Shahzad research published 《 Synthesis, spectral characterization, crystal structure and antibacterial activity of nickel(II), copper(II) and zinc(II) complexes containing ONNO donor Schiff base ligands》, the research content is summarized as follows. In the present study, a series of mononuclear Ni(II), Cu(II) and Zn(II) complexes with ONNO donor salen-type Schiff base ligands, derived from different 3,5-dihalosalicylaldehyde with polymethylenediamines of varying chain length, have been prepared All the synthesized compounds were characterized by using various spectroscopic (FT-IR and ¹H NMR) and anal. (CHN etc.) techniques. Furthermore, three complexes (ZnL¹, NiL³ and NiL⁴) were successfully characterized by single crystal x-ray diffraction. The data revealed that the geometry around Zn(II) was distorted square pyramidal for ZnL¹, while NiL³ and NiL⁴ complexes adapted slightly distorted octahedral geometries around Ni(II). The antibacterial activities of the synthesized ligands and their resp. complexes were elaborated by screening them against two strains of Gram pos. (Staphylococcus aureus and Bacillus cereus) and two strains of Gram neg. (Escherichia coli and Pseudomonas aeruginosa) bacteria. It was found from the measurements of zones of inhibition that metal chelates are marginally more effective than free ligands.

Related Products of 90-59-5, 3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes.

3,5-Dibromosalicylaldehyde, also known as 3,5-Dibromosalicylaldehyde, is a useful research compound. Its molecular formula is C7H4Br2O2 and its molecular weight is 279.91 g/mol. The purity is usually 95%.

3,5-Dibromosalicylaldehyde reacts with alkyl cyanoacetates in the presence of ammonium acetate to yield 4H- chromenes. 3,5-Dibromosalicylaldehyde can be used in the synthesis of Schiff base and can be used as reactant for synthesis of Schiff base ligands which forms mononuclear complexes with copper(II), nickel(II), zinc(II) and cobalt(II).

3,5-Dibromosalicylaldehyde is a copper complex that has been synthesized from 3,5-dibromosalicylaldehyde and copper chloride. FTIR spectroscopy revealed that the coordination geometry of the copper complex is octahedral with two nitrogen atoms in the equatorial plane. The presence of hydrogen bonding interactions was confirmed by homologous protein adsorption experiments. This chemical structure was determined using X-ray crystallography and fluorescence probe experiments. The copper complex showed high affinity for malonic acid, which is an ester hydrochloride. The molecular mechanism of this interaction is based on adsorption, which occurs through hydrogen bonding interactions and hydrophobic interactions. Structural analysis revealed that the polymeric matrix consists of a three-dimensional network of crosslinked chains, while FTIR analysis indicated a possible disulfide bond between two cysteine residues., 90-59-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine. 70-23-5, formula is C5H7BrO3, Name is Ethyl 3-bromo-2-oxopropanoate, COA of Formula: C5H7BrO3

Ghazvini, Maryam;Sheikholeslami-Farahani, Fatemeh;Hamedani, Naghmeh Faal;Shahvelayati, Ashraf Sadat;Rostami, Zohreh research published 《 Bio-Fe₃O₄ Magnetic Nanoparticles Promoted Green Synthesis of thioxo-1,3-Oxazole Derivatives: Study of Antimicrobial and Antioxidant Activity》, the research content is summarized as follows. In this work, 1,3-oxazoles I (R = COOEt, 4-methoxyphenyl, 4-methylphenyl, 4-bromophenyl; R¹ = t-Bu, 4-methoxyphenyl, 4-nitrophenyl; R² = COOEt, 4-methoxyphenyl, 4-methylphenyl, 4-bromophenyl) were generated using the multicomponent reaction of α-bromo ketones R/R²C(O)CH₂Br, alkyl (aryl) isothiocyanates R¹N=C=S, sodium hydride and Fe₃O₄ MNPs in the water at room temperature in good yields. The nanoparticles generated via the biosynthesis method have potential value in different purposes, such as organic synthesis. To study the antioxidant ability of some synthesized thioxo-1,3-oxazoles I, diphenyl-picrylhydrazine (DPPH) radical trapping and power of ferric reduction testes are employed. Among the studied thioxo-1,3-oxazoles, compound I (R = R² = COOEt; R¹ = 4-nitrophenyl) have good power for radical trapping and reduction activity than the standard antioxidants such as BHT and TBHQ. In addition, the antimicrobial activity of some thioxo-1,3-oxazoles I was studied, employing the disk diffusion test on Gram-pos. bacteria and Gram-neg. bacteria. The results of the disk diffusion test showed that compounds I (R = R² = COOEt, R¹ = 4-nitrophenyl; R = R² = COOEt, R¹ = 4-methoxyphenyl; R = R² = 4-methoxyphenyl, R¹ = t-Bu; R = R² = 4-bromophenyl R¹ = 4-nitrophenyl) prevented bacterial growth. Without employing catalyst, these reactions have low yield and busy mixture The synthesis of compound I (R = R² = COOEt; R¹ = 4-methoxyphenyl) as sample reaction has a similar yield in the presence of ZnO-NPs and Fe₃O₄ MNPs (entry 20 and entry 30), but the removal of catalyst from the mixture of reaction after the completion of the reaction is comfortable in the presence of Fe₃O₄ MNPs. Some of the advantages of performing these reactions with the present procedure are to carry out these reactions in water as a green solvent and simple removal of catalyst.

COA of Formula: C5H7BrO3, Ethyl bromopyruvate molecular formula is C5H7BrO3 and its molecular weight is 195.01 g/mol. The purity is usually 95%.

Ethyl bromopyruvate is used in a synthesis of thioxothiazolidines from carbon disulfide and primary amines.

Ethyl bromopyruvate is a chemical inhibitor that inhibits the enzyme pyruvate dehydrogenase, which is responsible for the conversion of pyruvic acid to acetyl-CoA. This inhibition leads to a decrease in ATP levels and can cause metabolic disorders. Ethyl bromopyruvate is used as an anthelmintic drug and in asymmetric synthesis. It is also used in the synthesis of thiostrepton, an antibiotic that has been shown to have antimicrobial activity against Gram-positive bacteria, including Staphylococcus aureus and Streptococcus pneumoniae., 70-23-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary