Month: October 2022

《Passive air sampling of halogenated polycyclic aromatic hydrocarbons in the largest industrial city in Korea: Spatial distributions and source identification》 was written by Vuong, Quang Tran; Kim, Seong-Joon; Nguyen, Tuyet Nam Thi; Thang, Phan Quang; Lee, Sang-Jin; Ohura, Takeshi; Choi, Sung-Deuk. Recommanded Product: 9,10-Dibromoanthracene And the article was included in Journal of Hazardous Materials in 2020. The article conveys some information:

Some halogenated polycyclic aromatic hydrocarbons (Halo-PAHs) are known to be more toxic than their corresponding parent PAHs, but studies on Halo-PAHs have been somewhat limited. In this study, passive air samplers were used to monitor Halo-PAH and PAH contamination at 20 sampling sites in Ulsan, one of the largest industrial cities in South Korea. The mean concentrations of Σ24 ClPAHs, Σ11 BrPAHs, and Σ13 PAHs were 207 pg/m3, 84 pg/m3, and 26 ng/m3, resp. Industrial areas displayed higher concentrations of both Halo-PAHs and PAHs than urban and rural areas. Strong correlations between energetically unfavorable Halo-PAHs and their corresponding parent PAHs suggest that the main formation mechanism of Halo-PAHs is not direct halogenation of PAHs. Low mol. weight Halo-PAHs with one halogen atom and their parent PAHs were dominant. The profiles of ClPAHs and BrPAHs in petrochem., automobile, shipbuilding, and non-ferrous industrial complexes were distinguished. The toxicity equivalency quantities (TEQs) of ClPAHs, BrPAHs, and PAHs at the industrial sites also showed the highest values of 4.2, 0.5, and 18.3 pg-TEQ/m3, resp., reflecting the high toxicity of Halo-PAHs. To the best of our knowledge, this is the first study reporting atm. levels of both ClPAHs and BrPAHs using passive air samplers. The results came from multiple reactions, including the reaction of 9,10-Dibromoanthracene(cas: 523-27-3Recommanded Product: 9,10-Dibromoanthracene)

9,10-Dibromoanthracene(cas: 523-27-3) is a dibrominated polycyclic aromatic hydrocarbon (PAH). 9,10-Dibromoanthracene is often used as an energy acceptor and activator in reactions that produce chemiluminescence.Recommanded Product: 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Photocross-Linkable Hole Transport Materials for Inkjet-Printed High-Efficient Quantum Dot Light-Emitting Diodes》 was written by Sun, Wenjian; Xie, Liming; Guo, Xiaojun; Su, Wenming; Zhang, Qing. Application of 4316-58-9 And the article was included in ACS Applied Materials & Interfaces in 2020. The article conveys some information:

Efficient approach based on the photochem. of benzophenone has been developed for the crosslinking of the polymer hole-transporting layer (HTL). The cross-linked poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-(4,4′-(N-(4-butylphenyl) (TFB) thin films showed high solvent stability, smooth surface morphol., and improved charge-carrier mobility. The solution-processed red, green, and blue (RGB) quantum dot light-emitting diodes (QLEDs) based on the cross-linked HTLs showed much better performances than the corresponding devices based on the pristine TFB HTLs. The spin-coated red QLEDs based on the cross-linked HTLs showed the maximum current efficiency (CE), the maximum power efficiency (PE), and the peak external quantum efficiency (EQE) of 32.3 cd A-1, 42.3 lm W-1, and 21.4%, resp. The inkjet-printed red QLEDs with the cross-linked HTLs exhibited the CE, PE, and EQE of 26.5 cd A-1, 37.8 lm W-1, and 18.1%, resp. The high-performance HTLs were obtained by significantly reducing the amount of crosslinking agents. In the experiment, the researchers used many compounds, for example, Tris(4-bromophenyl)amine(cas: 4316-58-9Application of 4316-58-9)

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

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Multi-fold Sonogashira coupling: a new and convenient approach to obtain tetraalkynyl anthracenes with tunable photophysical properties》 was written by Islam, Khadimul; Narjinari, Himani; Bisarya, Akshara; Kumar, Akshai. Computed Properties of C14H8Br2 And the article was included in Organic & Biomolecular Chemistry in 2021. The article conveys some information:

For the first time, a direct single-step one-pot route to access nine new sym. tetraalkynylated anthracenes via Pd(CH3CN)2Cl2/cataCXiumA catalyzed tetra-fold Sonogashira coupling was reported. Five of these tetraalkynylated anthracenes was crystallog. characterized, with two of them exhibiting multiple interactions that significantly shorten the inter-planar distances in the solid-state structure. The rich photophys. properties exhibited by these mols. hold immense promise for future applications in sensors and optoelectronic devices. Two of the considered tetraalkynylated anthracenes comprising a D-π-A-π-D motif demonstrate solvatochromism and halochromism, with one of them showing a low bandgap of 1.79 eV. The remaining compounds demonstrate bandgaps in the range of 1.79-2.04 eV. In addition to this study using 9,10-Dibromoanthracene, there are many other studies that have used 9,10-Dibromoanthracene(cas: 523-27-3Computed Properties of C14H8Br2) was used in this study.

9,10-Dibromoanthracene(cas: 523-27-3) can be sublimated and oxidized to generate anthraquinone. Soluble in hot benzene and hot toluene, slightly soluble in alcohol, ether and cold benzene, insoluble in water.Computed Properties of C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wojcik-Pszczola, Katarzyna; Jankowska, Agnieszka; Slusarczyk, Marietta; Jakiela, Bogdan; Plutecka, Hanna; Pociecha, Krzysztof; Swierczek, Artur; Popiol, Justyna; Koczurkiewicz-Adamczyk, Paulina; Wyska, Elzbieta; Pekala, Elzbieta; Gosens, Reinoud; Chlon-Rzepa, Grazyna published their research in Bioorganic Chemistry in 2021. The article was titled 《Synthesis and in vitro evaluation of anti-inflammatory, antioxidant, and anti-fibrotic effects of new 8-aminopurine-2,6-dione-based phosphodiesterase inhibitors as promising anti-asthmatic agents》.Recommanded Product: Ethyl 4-bromobutyrate The article contains the following contents:

Phosphodiesterase inhibitors are currently an extensively studied group of compounds that can bring many benefits in the treatment of various inflammatory and fibrotic diseases, including asthma. Herein, we describe a series of novel N′-phenyl- or N′-benzylbutanamide and N′-arylidenebutanehydrazide derivatives of 8-aminopurine-2,6-dione (27-43) and characterized them as prominent pan-PDE inhibitors. Most of the compounds exhibited antioxidant and anti-inflammatory activity in LPS-induced murine macrophages RAW264.7. The most active compounds (32-35 and 38) were evaluated in human bronchial epithelial cells derived from asthmatics. To better map the bronchial microenvironment in asthma, HBECs after exposure to selected 8-aminopurine-2,6-dione derivatives were incubated in the presence of two proinflammatory and/or profibrotic factors: TGF-beta and IL-13. Detailed anal. of their inhibition preferences for selected PDEs showed high affinity for isoenzymes important in the pathogenesis of asthma, including PDE1, PDE3, PDE4, PDE7, and PDE8. The presented data confirm that structural modifications within the 7 and 8 positions of the purine-2,6-dione core result in obtaining preferable pan-PDE inhibitors which in turn exert an excellent anti-inflammatory and anti-fibrotic effect in the bronchial epithelial cells derived from asthmatic patients. This dual-acting pan-PDE inhibitors constitute interesting and promising lead structures for further anti-asthmatic agent discovery. The experimental part of the paper was very detailed, including the reaction process of Ethyl 4-bromobutyrate(cas: 2969-81-5Recommanded Product: 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.Recommanded Product: Ethyl 4-bromobutyrate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Xiaoju; Li, Ying; Zhou, Sirong; Feng, Liheng published their research in Shanxi Daxue Xuebao, Ziran Kexueban in 2021. The article was titled 《Effective antibacterial agent with double arm clamp configuration for treatment of wound infections》.Application In Synthesis of 1,4-Bis(bromomethyl)benzene The article contains the following contents:

Pathogenic bacteria are always one of threat to human health. Developing novel and effective bactericides to replace current antibiotics is significant and imperative. A pyridine quaternary ammonium salt with double arm clamp configuration as an antibacterial material was designed and synthesized. By taking advantage of the bridging role and electron donating action of 2,2′-bis(4-(bromomethyl)benzyloxy)-1,1′-dinaphthalene, two pyridine mols. can join together to obtain increased pos. charges and antibacterial acivity. The synthesized antibacterial material can effectively kill three common pathogenic bacteria including Escherichia coli (ampicillin-resistant), Pseudomonas aeruginosa, and Salmonella typhimurium at a low concentration The mechanism of membrane-disrupted is proved to be related to the interaction with lipopolysaccharide. Furthermore, it is successfully applied to the treatment of bacteria-infected wound of living mice without obvious biotoxicity. In the experiment, the researchers used 1,4-Bis(bromomethyl)benzene(cas: 623-24-5Application In Synthesis of 1,4-Bis(bromomethyl)benzene)

1,4-Bis(bromomethyl)benzene(cas: 623-24-5) 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. Application In Synthesis of 1,4-Bis(bromomethyl)benzene Dehydrobromination, Grignard reactions, reductive coupling, Wittig reaction, and several nucleophilic substitution reactions are some of the principal reactions which involve organic bromides.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Weglarz, Izabela; Michalak, Karol; Mlynarski, Jacek published their research in Advanced Synthesis & Catalysis in 2021. The article was titled 《Zinc-Catalyzed Asymmetric Hydrosilylation of Cyclic Imines: Synthesis of Chiral 2-Aryl-Substituted Pyrrolidines as Pharmaceutical Building Blocks》.Quality Control of 1-Bromo-2-isopropylbenzene The article contains the following contents:

The first successful enantioselective hydrosilylation of cyclic imines promoted by a chiral zinc complex was reported. In situ generated zinc-ProPhenol complex with silane afforded pharmaceutically relevant enantioenriched 2-aryl-substituted pyrrolidines in high yields and with excellent enantioselectivities (up to 99% ee). The synthetic utility of presented methodol. was demonstrated in an efficient synthesis of the corresponding chiral cyclic amines, being pharmaceutical drug precursors to the Aticaprant and Larotrectinib. After reading the article, we found that the author used 1-Bromo-2-isopropylbenzene(cas: 7073-94-1Quality Control of 1-Bromo-2-isopropylbenzene)

1-Bromo-2-isopropylbenzene(cas: 7073-94-1) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals.Quality Control of 1-Bromo-2-isopropylbenzene Organobromine compounds have fallen under increased scrutiny for their environmental impact.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Su, Yingpeng; He, Haiyang; Zhao, Yanan; Li, Qinling; Feng, Yawei; Cao, Guiyan; Huang, Danfeng; Wang, Ke-Hu; Huo, Congde; Hu, Yulai published their research in Asian Journal of Organic Chemistry in 2021. The article was titled 《Sulfide-Catalyzed Diastereoselective Spirocyclopropanation: Constructing Spiro-cyclopropanyl-pyrazolones From α-Arylidenepyrazolones》.Category: bromides-buliding-blocks The article contains the following contents:

An efficient and diastereoselective [2+1] annulation of arylidenepyrazolones with bromides was developed that relies on in-situ formation of sulfur ylide via a direct sulfide-catalyzed process. A variety of spirocyclopropanyl pyrazolones were achieved in good to excellent yields (up to 93% yield) with high diastereoselectives (up to 20 : 1 dr). Meanwhile, several spirocyclopropanyl compounds were also prepared from corresponding enones. This catalytic strategy exhibited good functional group tolerance, gram-scale capacity and broad substrate scope and provided various spirocyclopropanyl derivativesBenzyl 2-bromoacetate(cas: 5437-45-6Category: bromides-buliding-blocks) was used in this study.

Benzyl 2-bromoacetate(cas: 5437-45-6) belongs to benzyl acetate. Benzyl acetate is a synthetic chemical produced for industry from benzyl alcohol and acetic acid, but is also naturally present in the essential oils of many plants, including jasmine and ylang ylang.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Koshino, Seitaro; Taniguchi, Tohru; Monde, Kenji; Kwon, Eunsang; Hayashi, Yujiro published their research in Chemistry – A European Journal in 2021. The article was titled 《Enantiodivergent One-Pot Synthesis of Axially Chiral Biaryls Using Organocatalyst-Mediated Enantioselective Domino Reaction and Central-to-Axial Chirality Conversion》.Product Details of 7073-94-1 The article contains the following contents:

Enantiodivergent one-pot synthesis of biaryls I (Ar = 2-O2NC6H4, 2-IC6H4, 1-naphthyl, etc.; R = H, 6-Br, 7-Br) from aryl aldehydes II and cinnamaldehydes ArCH:CHCHO has been developed using a catalytic amount of a single chiral source. A domino organocatalyst-mediated enantioselective Michael reaction and aldol condensation provided centrally chiral dihydronaphthalenes with excellent enantioselectivity, from which an enantiodivergent chirality conversion from central-to-axial chirality was achieved. Both enantiomers of biaryls I were obtained with excellent enantioselectivity. All transformations can be conducted in a single reaction vessel. A plausible reaction mechanism for the enantiodivergence is proposed. The results came from multiple reactions, including the reaction of 1-Bromo-2-isopropylbenzene(cas: 7073-94-1Product Details of 7073-94-1)

1-Bromo-2-isopropylbenzene(cas: 7073-94-1) belongs to organobromine compounds.Organobromine chemicals are produced naturally by an array of biological and other chemical processes in our environment. Some of these compounds are identical to man-made organobromine compounds, such as methyl bromide, bromoform, and bromophenols, but many others are entirely new moleclar entities, often possessing extraordinary and important biological properties. Product Details of 7073-94-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

OuYang, Yiqiang; Gao, Jian; Zhao, Lei; Lu, Junfeng; Zhong, Haiqing; Tang, Hua; Jin, Shuanglong; Yue, Lu; Li, Yuezhen; Guo, Wenjie; Xu, Qiang; Lai, Yisheng published their research in Journal of Medicinal Chemistry in 2021. The article was titled 《Design, Synthesis, and Evaluation of o-(Biphenyl-3-ylmethoxy)nitrophenyl Derivatives as PD-1/PD-L1 Inhibitors with Potent Anticancer Efficacy In Vivo》.Product Details of 76006-33-2 The article contains the following contents:

Two series of novel o-(biphenyl-3-ylmethoxy)nitrophenyl compounds I (R1 = 2-hydroxyethylamino, furan-ylmethylamino, (2-acetamidoethyl)aminyl, etc.; R2 = H, Me, Br) and II (R3 = 3-cyanobenzyloxy, 3-pyridinylmethoxy, 2-cyanopyridin-4-ylmethoxy) were designed as programmed cell death protein 1 (PD-1)/PD-ligand 1 (PD-L1) inhibitors. All compounds showed significant inhibitory activity with IC50 values ranging from 2.7 to 87.4 nM except compound I (R1 = (2S)-2-aminyl-3-hydroxybutanoic acid), and compound II (III, R1 = (2S)-2-aminyl-3-hydroxybutanoic acid; R3 = 3-cyanobenzyloxy) displayed the best activity. Further experiments showed that III bound to the PD-L1 protein without obvious toxicity in Lewis lung carcinoma (LLC) cells. Furthermore, III significantly promoted interferon-gamma secretion in a dose-dependent manner in vitro and in vivo. Especially, III exhibited potent in vivo anticancer efficacy in an LLC-bearing allograft mouse model at a low dose of 5 mg/kg, which was more active than BMS-1018 (tumor growth inhibition rate: 48.5% vs 17.8%). A panel of immunohistochem. and flow cytometry assays demonstrated that III effectively counteracted PD-1-induced immunosuppression in the tumor microenvironment, thereby triggering antitumor immunity. These results indicate that III is a promising PD-1/PD-L1 inhibitor worthy of further development. After reading the article, we found that the author used 3-Bromo-2-methylbenzoic acid(cas: 76006-33-2Product Details of 76006-33-2)

3-Bromo-2-methylbenzoic acid(cas: 76006-33-2) belongs to organobromine compounds.Organobromine chemicals are produced naturally by an array of biological and other chemical processes in our environment. Organobromine compounds are produced naturally by marine creatures (sponges, corals, sea slugs, tunicates, sea fans) and seaweed, plants, fungi, lichen, algae, bacteria, microbes, and some mammals. Product Details of 76006-33-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Feizi, Zahra Hosseinpour; Fatehi, Pedram published their research in Carbohydrate Polymers in 2021. The article was titled 《Interaction of hairy carboxyalkyl cellulose nanocrystals with cationic surfactant: Effect of carbon spacer》.Quality Control of 8-Bromooctanoic acid The article contains the following contents:

Tuning the surface chem. of nanocellulose is essential for developing its end-use applications. Herein, different carboxyalkylated cellulose nanocrystals (CNC) with similar charge densities but with tunable hairy structures were produced. The effect of carbon spacer of the grafted groups on the interaction of the CNC and a cationic surfactant, myristyl tri-Me ammonium bromide (MTAB), at different pH and salinity was explored. The CNC with longer grafted chain length was more hydrophobic, adsorbed more MTAB, and formed a more compact MTAB ad-layer than did CNC with the shorter chain length. Also, the adsorption was higher at neutral pH, implying a high electrostatic attraction and hydrophobic interaction between substrates. The hydrophobic interaction of MTAB and hairy CNC in saline systems improved its adsorption. Although MTAB adsorbed more when its concentration was higher than its critical micelle concentration (CMC), the adsorbed ad-layer had a less compact structure on the CNC surfaces. The experimental part of the paper was very detailed, including the reaction process of 8-Bromooctanoic acid(cas: 17696-11-6Quality Control of 8-Bromooctanoic acid)

8-Bromooctanoic acid(cas: 17696-11-6) acid is used in the synthesis of 8-(N-Methyl-4,4′-bipyridinyl)- octanoic acid. 8-Mercaptooctanoic acid was prepared from 8-bromooctanoic acid. And 8-Bromooctanoic Acid is a useful compound for sonodynamic therapy.Quality Control of 8-Bromooctanoic acid

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary