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Journal articles on the topic 'Brominatio'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Ho, C. T. "Nickel-coated carbon fiber-reinforced tin-lead alloy composites." Journal of Materials Research 10, no. 7 (1995): 1730–35. http://dx.doi.org/10.1557/jmr.1995.1730.

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Nickel is deposited over pristine, surface-treated, and brominated P-100 carbon fibers using cementation and electroplating techniques. The fibers are brominated by bromine vapor for 48 h and then desorbed at 200 °C in air for 12 h. The anodic oxidation treatment is performed by etching fibers electrochemically in a dilute sodium electrolyte for 3 min or by immersing fibers in nitric acid for 72 h. Electroplated-coated fibers show better tensile properties than cementation-coated fibers. Tin-lead alloy composites reinforced by nickel-coated fibers (which are pristine, anodically oxidized, and

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2

Kolegova, T. A., I. Yu Chukicheva, O. G. Shevchenko, and A. V. Kutchin. "Synthesis and some properties of new bromo derivatives of isobornylphenols." Журнал общей химии 93, no. 8 (2023): 1190–205. http://dx.doi.org/10.31857/s0044460x2308005x.

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We determined optimal conditions to brominate various isobornyl phenols with molecular bromine and N -bromosuccinimide as well as studied oxidative bromination of them with KBr-Oxone®. For obtained brominated derivatives, as isobornylphenols, an assessment of erythrotoxicity, membrane-protective and antioxidant activity was performed using in vitro models. Halogen derivatives of isobornylphenols containing a bromine atom in the para -position and an alkyl fragment in the ortho -position relative to the phenolic hydroxyl group showed high antioxidant activity in the model of oxidative hemolysis

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3

Kajorinne, Jessie K., Jennifer C. M. Steers, Marnie E. Merchant, and Craig D. MacKinnon. "Green halogenation reactions for (hetero)aromatic ring systems in alcohol, water, or no solvent." Canadian Journal of Chemistry 96, no. 12 (2018): 1087–91. http://dx.doi.org/10.1139/cjc-2018-0259.

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A new method of brominating aromatic and heteroaromatic ring systems is investigated. The combination of hydrobromic acid as the halogen source, hydrogen peroxide as the oxidant, and ethanol, water, or no solvent are evaluated as greener conditions than those that have been previously published. The new conditions give high yields and good regioselectivity for a variety of substrates when the ring is activated by electron-donating groups or heteroatoms. Phenols, anisole, thiophenes, and pyrrole give comparable or superior results when compared to a traditional bromination by N-bromosuccinimide

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4

Kaszas, Gabor, and Binh Tran. "Synthesis, Bromination and Cure of Isobutylene/Isoprene/P-Methylstyrene and Isobutylene/Isoprene/Styrene Terpolymers." Rubber Chemistry and Technology 75, no. 1 (2002): 155–69. http://dx.doi.org/10.5254/1.3547667.

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Abstract High molecular weight isobutylene/isoprene/p-methylstyrene and isobutylene/isoprene/styrene terpolymers containing up to 10.6 mol% p-methylstyrene and 3.6 mol% styrene were synthesized using “H2O”/AlCl3 as an initiator/coinitiator system in methylchloride at -95 °C. p-Methylstyrene was found to be uniformly distributed in the chains due to its similar reactivity to isobutylene. In contrast, styrene had a lower reactivity than isobutylene or even isoprene, resulting in low conversion of the styrene monomer. The reactivity ratios obtained were in good agreement with the published values

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5

Grishchenko, L. M., A. N. Zaderko, G. G. Tsapyuk, I. P. IMatushko, A. V. Yatsymyrskyi, and O. V. Mischanchuk. "Dehydration of isopropyl alcohol with activated carbon functionalized with Br- and S-containing reagents." Voprosy Khimii i Khimicheskoi Tekhnologii, no. 3 (May 2021): 90–99. http://dx.doi.org/10.32434/0321-4095-2021-136-3-90-99.

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Bromination of activated carbon GSGD was performed and active bromine-containing precursors were obtained, in which bromine is capable of being replaced by sulfur-containing functional groups. Bromination with liquid bromine and a solution of bromine in potassium bromide at room temperature leads to the introduction of 0.44–0.45 mmol g–1 of bromine into the surface layer of activated carbon. The treatment of brominated samples with sulfur-containing reagents with subsequent oxidation allows obtaining carbon samples that are catalytically active in the dehydration reaction of isopropyl alcohol

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6

Mahammed, Atif, Boris Tumanskii, and Zeev Gross. "Effect of bromination on the electrochemistry, frontier orbitals, and spectroscopy of metallocorroles." Journal of Porphyrins and Phthalocyanines 15, no. 11n12 (2011): 1275–86. http://dx.doi.org/10.1142/s1088424611004191.

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A series of fully β-pyrrole brominated triarylcorrole metal complexes has been prepared for investigating the changes in visible spectra and redox potentials relative to the non-brominated derivatives, as well as for comparing the effect of bromination in corroles and porphyrins. The results reveal that bromination has a much larger effect on the electrochemistry of metallocorroles relative to metalloporphyrins, for both macrocycle- and metal-centered redox processes. The HOMO–LUMO gap energy of the triarylcorrole post-transition metal complexes decreases upon bromination because the effect on

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7

Mazov, Ilya, Dmitry Krasnikov, Andrey Stadnichenko, et al. "Direct Vapor-Phase Bromination of Multiwall Carbon Nanotubes." Journal of Nanotechnology 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/954084.

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We present the simple procedure of the vapor-phase bromination of multiwall carbon nanotubes (MWNTs) at moderate temperatures. MWNTs with average diameter9±3 nm were treated with Br2vapors at 250°C to produce Br-functionalized product. Transmission electron microscopy analysis was used to prove low damage of MWNT walls during bromination. X-ray photoelectron spectroscopy (XPS) and differential thermal analysis (DTA) were used to investigate chemical composition of the surface of initial and brominated nanotubes. The experimental results show that the structure of MWNTs is not affected by the b

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8

Tan, Shu Er, and Mohd Sani Sarjadi. "Alternative pathway to brominate 2,13-benzothiadiazole: Preparation of 4,7-dibromobenzo[c]-1,2,5-thiadiazole via N-bromosuccinimide." Malaysian Journal of Fundamental and Applied Sciences 13, no. 4 (2017): 760–63. http://dx.doi.org/10.11113/mjfas.v0n0.549.

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This present work reports an alternative pathway to brominate the 2,1,3-benzothiadiazole (BT). The conventional method to brominate a phenyl/benzene ring is to use the bromine solution (Br2) together with hydrobromic acid (HBr). This is because the phenyl/benzene rings exhibit high stability due to the delocalized -conjugation, which the substitution of bromines into the rings can only be done through a strong bromination source, e.g. the Br2/HBr. Besides that, there is another bromine source, known as N-bromosuccinimide (NBS), which is normally used for bromination of thiophene rings but not

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9

Sushil, Kumar Sharma, and D. Agarwal D. "A direct and simplistic bromination of commercially important organic compounds in aqueous media by eco-friendly AlBr3-Br2 reagent system." Chemistry International 1, no. 3 (2015): 107–17. https://doi.org/10.5281/zenodo.1470133.

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A facile, simplistic, highly efficient, environmentally safe, regioselective, controllable and economical method for the bromination of organic compounds using aqueous AlBr3-Br2 reagent system was investigated. As synthesized brominated organic compounds were characterize using advanced techniques. The yield was all synthesized brominated organic compounds was excellent with high purity. Results revealed that this direct and simple bromination of commercially important organic compounds in aqueous media in the presence of recycle of AlBr3-Br2 reagent system is efficient method and could possib

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10

Huang, Chi Bao, Dao Sheng Yi, and Tang Mao Liu. "The Molecular Structures of Alpha-Brominated 2,5-Dimethyl-Terephthalonitrile Derivatives and the Dependences of Their Yields on the Reaction Time." Advanced Materials Research 476-478 (February 2012): 1178–85. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.1178.

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The number and molecular structures of the alpha-brominated 2,5-dimethylterephthalonitrile (DMT) derivatives and the dependences of the yields of derivatives on the reaction time were systematicaly investigated by means of NMR spectroscopy, MS and chromatography. The alpha-brominated DMT derivatives were comprised of 2-bromomethyl-5-methylterephthalonitrile (1), 2,5-bis(bromomethyl)terephthalonitrile (2), 2-(1,1-dibromo)methyl-5-methylterephthalonitrile (3) and 2-bromomethyl-5-(1,1-dibromo)methylterephthalonitrile (4). More than 90 % of DMT mainly transformed swiftly into 1 during the first tw

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11

Zhou, Houbo, Yi Chen, Christopher M. Plummer, Huahua Huang, and Yongming Chen. "Facile and efficient bromination of hydroxyl-containing polymers to synthesize well-defined brominated polymers." Polymer Chemistry 8, no. 14 (2017): 2189–96. http://dx.doi.org/10.1039/c7py00283a.

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12

Berthelot, Jacques, Catherine Guette, Paul-Louis Desbène, Jean-Jacques Basselier, Patrick Chaquin, and Daniel Masure. "Bromation régiosélective en série aromatique. I: Monobromation en position para de phénols et d'aminés aromatiques par le tribromure de tétrabutylammonium." Canadian Journal of Chemistry 67, no. 12 (1989): 2061–66. http://dx.doi.org/10.1139/v89-320.

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The reaction of tetrabutylammonium tribromide (TBABr3) with phenols and aromatic amines in aprotic and non-basic solvents at 20 °C gives exclusively the corresponding para-brominated compounds in high yields. A mechanism involving electrophilic substitution by the tribromide anion Br3− itself is suggested to account for the results, especially the regioselective para bromination. Keywords: bromination, tetrabutylammonium tribromide, phenols, aromatic amines.

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13

Choothong, Nuorn, and Seiichi Kawahara. "BROMINATION OF NATURAL RUBBER WITH N-BROMOSUCCINIMIDE." Rubber Chemistry and Technology 95, no. 1 (2021): 37–45. http://dx.doi.org/10.5254/rct.21.78980.

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ABSTRACT The mechanism of bromination of natural rubber (NR) was studied by solution-state 1H-NMR spectroscopy. The bromination of NR was carried out at 20–50 °C with N-bromosuccinimide as the brominating agent, and the kinetic study of bromination was conducted under nitrogen atmosphere at 30–50 °C for various reaction times. The influence of bromine atom substituent on the bromination rate constant (k) also was investigated. Bromine atom content was found to be dependent upon the reaction time, indicating first-order kinetics. The activation energy of bromination of NR, calculated from the r

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14

Yan, Jingling, Liang Zhu, Brian L. Chaloux, and Michael A. Hickner. "Anion exchange membranes by bromination of tetramethylbiphenol-based poly(sulfone)s." Polymer Chemistry 8, no. 16 (2017): 2442–49. http://dx.doi.org/10.1039/c7py00026j.

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Anion exchange membranes were developed by brominating poly(sulfone)s based on tetramethylbiphenol, and their bromination reaction and properties were compared with those based on tetramethylbisphenol A.

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15

Sushil, Kumar Sharma. "Eco-friendly and fast bromination of industrially-important aromatic compounds in water using recyclable AlBr3-Br2 system." Chemistry International 1, no. 1 (2015): 60–70. https://doi.org/10.5281/zenodo.1469796.

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A fast, efficient, simple, eco-friendly, regioselective, controllable and economical method for the bromination of aromatic compounds using AlBr3-Br2 system was invetigated. The direct bromination of anilines and phenols with molecular bromine in solution frequently results in polybromination, and when brominated in the existence of oxidants, they also get oxidized rather than experiencing substitutions and in some cases, require fortification of the amino (-NH2) group.

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16

Liu, Ming Xing, Li Xiu Hu, Xian Wen Wang та Hong Da Zhu. "A Simple, Efficient and Selective α-Monobromination for Arylacenones under Solvent-Free Condition". Advanced Materials Research 396-398 (листопад 2011): 1079–82. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.1079.

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The α-bromination reaction of arylacenones with 1,2-dipyridiniumditribromide-ethane (DPTBE) as brominating agent under solvent-free condition, selectively gave the corresponding α-bromoarylacenones derivatives with a simple procedure and excellent yields.

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17

Sen, Partha Pratim, Vishal Jyoti Roy, and Sudipta Raha Roy. "Metal-free regioselective bromination of imidazo-heteroarenes: the dual role of an organic bromide salt in electrocatalysis." Green Chemistry 23, no. 15 (2021): 5687–95. http://dx.doi.org/10.1039/d1gc01069g.

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This paper presents an organo-electrocatalysis method which demonstrates the dual role of an organic bromide salt as a brominating agent and as an electrolyte for the regioselective bromination of imidazo heteroaromatic motifs.

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18

Harms, G., and M. J. Hardonk. "Specific demonstration of ribonucleic acid by chemical bromination and immunohistochemistry." Journal of Histochemistry & Cytochemistry 37, no. 4 (1989): 479–85. http://dx.doi.org/10.1177/37.4.2466888.

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In this report we describe a specific staining procedure for detection of ribonucleic acid (RNA), based on bromination of uracil and subsequent immunohistochemical visualization of 5-bromouracil in RNA. This method is applicable for both cryostat and glycol methacrylate (GMA)-embedded sections. Cryostat sections must be fixed in formaldehyde, whereas tissue pieces to be embedded in GMA are fixed in cold acetone. Before bromination, sections must be treated with trypsin. Bromination was performed in a solution of bromine in potassium bromide. After bromination, excess bromine was removed with s

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19

Mohan, Reddy Bodireddy, G. Trivikram Reddy та N. C. Gangi Reddy. "Substrate Directed Regioselective Monobromination of Aralkyl Ketones Using N-Bromosuccinimide Catalysed by Active Aluminium Oxide: α-Bromination versus Ring Bromination". ISRN Organic Chemistry 2014 (4 березня 2014): 1–11. http://dx.doi.org/10.1155/2014/751298.

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Bromination of aralkyl ketones using N-bromosuccinimide in presence of active Al2O3 provided either α-monobrominated products in methanol at reflux or mononuclear brominated products in acetonitrile at reflux temperature with excellent isolated yields depending on the nature of substrate employed. The α-bromination was an exclusive process when aralkyl ketones containing moderate activating/deactivating groups were subjected to bromination under acidic Al2O3 conditions in methanol at reflux while nuclear functionalization was predominant when aralkyl ketones containing high activating groups w

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20

Výprachtický, Drahomír, Dana Kaňková, Veronika Pokorná, Ivan Kmínek, Vagif Dzhabarov, and Věra Cimrová. "Novel and Simple Synthesis of Brominated 1,10-Phenanthrolines." Australian Journal of Chemistry 67, no. 6 (2014): 915. http://dx.doi.org/10.1071/ch13711.

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A novel, simple, and reasonably efficient synthesis of 3,8-dibromo-1,10-phenanthroline, 3,6-dibromo-1,10-phenanthroline, 3,5,8-tribromo-1,10-phenanthroline, and 3,5,6,8-tetrabromo-1,10-phenanthroline is presented herein. The crucial role of a new catalyst (sulfur dichloride – SCl2) for the bromination of 1,10-phenanthroline is reported. The bromination of 1,10-phenanthroline monohydrate in the presence of SCl2 and pyridine yielded the brominated compounds, previously only possible through the complicated multi-step and tedious Skraup synthesis method. The application of the bromination catalys

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21

Wang, Ligeng, Chun Feng, Yan Zhang, and Jun Hu. "Regioselective Monobromination of Phenols with KBr and ZnAl–BrO3−–Layered Double Hydroxides." Molecules 25, no. 4 (2020): 914. http://dx.doi.org/10.3390/molecules25040914.

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The regioselective mono-bromination of phenols has been successfully developed with KBr and ZnAl–BrO3−–layered double hydroxides (abbreviated as ZnAl–BrO3−–LDHs) as brominating reagents. The para site is much favorable and the ortho site takes the priority if para site is occupied. This reaction featured with excellent regioselectivity, cheap brominating reagents, mild reaction condition, high atom economy, broad substrate scope, and provided an efficient method to synthesize bromophenols.

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22

Sun, Yonghui, Qiyu He, Xucheng Lv, et al. "Switchable Site-Selective Benzanilide C(sp2)-H Bromination via Promoter Regulation." Molecules 29, no. 12 (2024): 2861. http://dx.doi.org/10.3390/molecules29122861.

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Regioselective benzanilide bromination that generates either regioisomer from the same starting material is desirable. Herein, we develop switchable site-selective C(sp2)-H bromination by promoter regulation. This protocol leads to regiodivergent brominated benzanilide starting from the single substrate via selection of promoters. The protocol demonstrates excellent regioselectivity and good tolerance of functional groups with high yields. The utility effectiveness of this method has been well exemplified in the late-stage modification of biologically important molecules.

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23

Li, Yingqian, Yali Liu, Di Hao, Liang Xu, and Ping Liu. "Regioselective bromination of pyrrolo[1,2-a]quinoxalines." RSC Advances 14, no. 49 (2024): 36488–96. http://dx.doi.org/10.1039/d4ra07358d.

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A novel and efficient method for the regioselective bromination of pyrrolo[1,2-a]quinoxaline using tetrabutylammonium tribromide was developed. A series of highly selective C3-brominated or C1, C3-dibrominated products were obtained in good yields.

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24

Shao, Changdong, Jingyi Liu, Yanan Shen, et al. "Copper-promoted oxidative mono- and di-bromination of 8-aminoquinoline amides with HBr and DMSO." RSC Advances 15, no. 11 (2025): 8750–56. https://doi.org/10.1039/d5ra00492f.

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An efficient and convenient protocol for copper-promoted oxidative mono- and di-bromination of 8-aminoquinoline amides using hydrogen bromide (HBr) as the brominating reagent and dimethyl sulfoxide (DMSO) as a mild oxidant has been developed.

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25

Van Kerrebroeck, Reinout, Pieter Naert, Thomas S. A. Heugebaert, Matthias D’hooghe, and Christian V. Stevens. "Electrophilic Bromination in Flow: A Safe and Sustainable Alternative to the Use of Molecular Bromine in Batch." Molecules 24, no. 11 (2019): 2116. http://dx.doi.org/10.3390/molecules24112116.

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Bromination reactions are crucial in today’s chemical industry since the versatility of the formed organobromides makes them suitable building blocks for numerous syntheses. However, the use of the toxic and highly reactive molecular bromine (Br2) makes these brominations very challenging and hazardous. We describe here a safe and straightforward protocol for bromination in continuous flow. The hazardous Br2 or KOBr is generated in situ by reacting an oxidant (NaOCl) with HBr or KBr, respectively, which is directly coupled to the bromination reaction and a quench of residual bromine. This prot

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26

He, Cuiwen, Wenxin Song, Thomas A. Weston, et al. "Peroxidasin-mediated bromine enrichment of basement membranes." Proceedings of the National Academy of Sciences 117, no. 27 (2020): 15827–36. http://dx.doi.org/10.1073/pnas.2007749117.

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Bromine and peroxidasin (an extracellular peroxidase) are essential for generating sulfilimine cross-links between a methionine and a hydroxylysine within collagen IV, a basement membrane protein. The sulfilimine cross-links increase the structural integrity of basement membranes. The formation of sulfilimine cross-links depends on the ability of peroxidasin to use bromide and hydrogen peroxide substrates to produce hypobromous acid (HOBr). Once a sulfilimine cross-link is created, bromide is released into the extracellular space and becomes available for reutilization. Whether the HOBr genera

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27

Satkar, Yuvraj, Velayudham Ramadoss, Pradip D. Nahide, et al. "Practical, mild and efficient electrophilic bromination of phenols by a new I(iii)-based reagent: the PIDA–AlBr3system." RSC Advances 8, no. 32 (2018): 17806–12. http://dx.doi.org/10.1039/c8ra02982b.

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A practical electrophilic bromination procedure for the phenolic core was developed under efficient and very mild reaction conditions. The new I(iii)-based brominating reagentPhIOAcBroperationally easy to prepare by mixing PIDA and AlBr<sub>3</sub>was used.

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28

Mangesh, N. Zade, M. Katiya Manish, M. Sontakke Madhuri, et al. "C-S and C-N coupling reactions of barbituric acid via selective and complete bromination using greener KBr/H2O2 as a brominating agent." Journal of Indian Chemical Society Vol. 95, May 2018 (2018): 553–58. https://doi.org/10.5281/zenodo.5642901.

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Department of Chemistry, Shri Mathuradas Mohota College of Science, Nagpur-440 009, Maharashtra, India E-mail: madhudash2001@yahoo.co.in Fax: 91-712-2744992 Department of Chemistry, R.T.M. Nagpur University, Nagpur-440 033, Maharashtra, India Regional Forensic Science Laboratory, Govt. of Maharashtra, Amravati-444 603, Maharashtra, India Taywade College, Koradi, Dist. Nagpur, Maharashtra, India <em>Manuscript received 05 March 2018, revised 16 March 2018, accepted 11 April 2018</em> 1,3-Disubstituted/unsubstituted barbituric acids on treatment with KBr-H<sub>2</sub>O<sub>2</sub> as a

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29

Mazzanti, Virginia, Martina Cacciarini, Søren L. Broman, et al. "On the bromination of the dihydroazulene/vinylheptafulvene photo-/thermoswitch." Beilstein Journal of Organic Chemistry 8 (June 27, 2012): 958–66. http://dx.doi.org/10.3762/bjoc.8.108.

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Background: The dihydroazulene (DHA)/vinylheptafulvene (VHF) system (with two cyano groups at C1) functions as a photo-/thermoswitch. Direct ionic bromination of DHA has previously furnished a regioselective route to a 7,8-dibromide, which by elimination was converted to a 7-bromo-substituted DHA. This compound has served as a central building block for functionalization of the DHA by palladium-catalyzed cross-coupling reactions. The current work explores another bromination protocol for achieving the isomeric 3-bromo-DHA and also explores the outcome of additional bromination of this compound

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30

Bouillaud, A., M. Dargelos, and ME Borredon. "Synthesis of Dibromohydrins From Glycerol by Using an Ion Exchange Resin as Catalyst." Australian Journal of Chemistry 47, no. 11 (1994): 2123. http://dx.doi.org/10.1071/ch9942123.

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Bromination of glycerol by 48% hydrobromic acid in the presence of an acid ion exchange resin (C264 or A19) led to the formation of a mixture of 1,3- and 2,3-dibromohydrins in a yield of around 70%. The side products were essentially brominated polyglycerols.

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31

Lemay, Rosalie, Jean-Philippe Tremblay-Morin, Hasrat Ali, Darel Hunting, Johan E. van Lier, and Benoit Paquette. "Synthesis and radiosensitizing properties of brominated tetrapyridine porphyrins." Journal of Porphyrins and Phthalocyanines 11, no. 08 (2007): 549–55. http://dx.doi.org/10.1142/s1088424607000643.

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Brominated derivatives of tetrapyridinium copper porphyrin were prepared via bromination of the β-positions (pyrrole rings) and/or the peripheral alkyl side-chains attached to the pyridine moieties. The radiosensitizing properties of these new cationic, brominated porphyrins were tested on MDA-MB-231 breast cancer cells in vitro using a 60 Co source or an X-ray irradiator. The non-brominated porphyrin and the porphyrin containing bromines at β-positions only were devoid of any radiosensitizing activity. However, a pronounced radiosensitizing effect was observed with the porphyrin containing br

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32

Çakmak, Osman, and Salih Ökten. "Regioselective bromination: Synthesis of brominated methoxyquinolines." Tetrahedron 73, no. 36 (2017): 5389–96. http://dx.doi.org/10.1016/j.tet.2017.07.044.

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33

Sneh, Kumar, Takeru Torigoe, and Yoichiro Kuninobu. "Manganese/bipyridine-catalyzed non-directed C(sp3)–H bromination using NBS and TMSN3." Beilstein Journal of Organic Chemistry 17 (April 22, 2021): 885–90. http://dx.doi.org/10.3762/bjoc.17.74.

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A Mn(II)/bipyridine-catalyzed bromination reaction of unactivated aliphatic C(sp3)−H bonds has been developed using N-bromosuccinimide (NBS) as the brominating reagent. The reaction proceeded in moderate-to-good yield, even on a gram scale. The introduced bromine atom can be converted into fluorine and allyl groups.

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34

Sobolev, Vasily, Vyacheslav Radchenko, Roman Ostvald, Victor D. Filimonov, and Ivan Zherin. "p-Nitrotoluene Bromination Using Barium Fluorobromate Ba(BrF₄)₂." Advanced Materials Research 1040 (September 2014): 337–41. http://dx.doi.org/10.4028/www.scientific.net/amr.1040.337.

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It was shown that Ba (BrF4)2 acts like a highly-active brominating agent in case of interaction with p-nitrotoluene, the pure 3-bromo-nitrotoluene is formed. It was shown, that typical electrophilic bromination of aromatic compound with electron-donating and electron-accepting substituents occurs without any catalysts and hard conditions.

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35

Argade, Narshinha, and Kailas Pandhade. "First Total Synthesis of (±)-Rhodoconferimide." Synthesis 50, no. 03 (2017): 658–62. http://dx.doi.org/10.1055/s-0036-1590944.

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Starting from vanillin and dimethyl maleate, a concise and efficient racemic total synthesis of the potent antioxidant marine natural product (±)-rhodoconferimide has been carried out via the Wittig reaction, catalytic hydrogenation, selective brominations, and imide formation. An appropriate regioselective double bromination of the aromatic ring was a key step in the synthesis.

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36

Zarska, Sandra, Damian Kulawik, Volodymyr Pavlyuk, et al. "A Facile and Efficient Bromination of Multi-Walled Carbon Nanotubes." Materials 14, no. 12 (2021): 3161. http://dx.doi.org/10.3390/ma14123161.

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The bromination of multi-walled carbon nanotubes (MWCNT) was performed with vapor bromine in a closed vessel, and they were subjected to intensive stirring with a magnetic stirrer for up to 14 days. The efficiency of bromination was compared depending upon duration. The structure and surface of the crude and purified products were characterized by detailed physicochemical analyses, such as SEM/EDS, TEM, XRD, TGA, Raman, and XPS spectroscopies. The studies confirmed the presence of bromine covalently bound with nanotubes as well as the formation of inclusion MWCNT–Br2 complexes. It was confirme

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37

Kaukulis, Martins, Martins Rucins, Davis Lacis, Aiva Plotniece, and Arkadij Sobolev. "Development of Self-Assembling bis-1,4-Dihydropyridines: Detailed Studies of Bromination of Four Methyl Groups and Bromine Nucleophilic Substitution." Molecules 29, no. 1 (2023): 161. http://dx.doi.org/10.3390/molecules29010161.

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One of the most important steps in the synthesis of 1,4-dihydropyridine (1,4-DHP) amphiphiles is the bromination of methyl groups in positions 2 and 6 of the entire ring. However, up to now, only N-bromosuccinimide was mainly used for bromination 1,4-DHPs. In this work, the synthesis of bis-1,4-DHP derivatives with ethyl and dodecyl ester groups attached to 1,4-DHP ring at positions 3 and 5 was performed by Hantzsch synthesis. The experimental studies were carried out to find out the best conditions and the agent for the tetra bromination of bis-1,4-DHP methyl groups at positions 2 and 6. Four

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38

Chaudhuri, Subrata Kumar, Sanchita Roy, and Sanjay Bhar. "Dioxane dibromide mediated bromination of substituted coumarins under solvent-free conditions." Beilstein Journal of Organic Chemistry 8 (February 29, 2012): 323–29. http://dx.doi.org/10.3762/bjoc.8.35.

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An efficient solvent-free protocol for regioselective bromination of substituted coumarins has been developed by using dioxane dibromide as the solid brominating agent. The efficacy of the solvent-free protocol has been established. The effects of the electronic nature and location of the substituents on the outcome of the reaction have been rationalized with a proposed mechanism.

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39

Tian, Hongyu, Baoguo Sun, Rui Ding, et al. "A Highly Efficient Method for the Bromination of Alkenes, Alkynes and Ketones Using Dimethyl Sulfoxide and Oxalyl Bromide." Synthesis 50, no. 21 (2018): 4325–35. http://dx.doi.org/10.1055/s-0037-1609560.

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The pairing of DMSO and oxalyl bromide is reported as a highly efficient brominating reagent for various alkenes, alkynes and ketones. This bromination approach demonstrates remarkable advantages, such as mild conditions, low cost, short reaction times, provides excellent yields in most cases and represents a very attractive alternative for the preparation of dibromides and α-bromoketones.

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40

Suárez-Castillo, Oscar R., Myriam Meléndez-Rodríguez, Lidia Beiza-Granados, Indira C. Cano-Escudero, Martha S. Morales-Ríos, and Pedro Joseph-Nathan. "C-6 Regioselective Bromination of Methyl Indolyl-3-acetate." Natural Product Communications 6, no. 4 (2011): 1934578X1100600. http://dx.doi.org/10.1177/1934578x1100600405.

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An efficient route to natural occurring methyl 6-bromoindolyl-3-acetate 1c from methyl indolyl-3-acetate 3 was achieved in 3 steps and 68% overall yield. Thus, in order to regioselectively brominate 3 at the C6-position, introduction of electron withdrawing substituents at N1 and C8 was affected to give intermediate 4 in 82% yield. Bromination of 4 with 8 equiv of bromine in CCl4 and washings with aqueous Na2SO3 gave 5 in 86% yield, which was N- and C-decarbomethoxylated by treatment with NaCN in DMSO, affording 1c in 97% yield. The regioselectivity of bromination was evidenced by NMR spectros

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41

Ali, Hasrat, та Johan E. van Lier. "A new method for the synthesis of meso-brominated β-substituted porphyrins". Journal of Porphyrins and Phthalocyanines 15, № 07n08 (2011): 691–96. http://dx.doi.org/10.1142/s108842461100363x.

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The reaction of Ni (II) complexes of etioporphyrins I, octaethylporphyrins, coproporphyrinsI tetramethylester, methyl pyrroporphyrin XXI ethylester and mesoporphyrin IX dimethyl ester derivatives with N-bromosuccinimide and triethylamine trihydrofluoride gave mono- through tetra-meso-brominated derivatives as the principal products. β-brominated products were also detected with the simultaneous loss of the β-alkyl substituents. Reaction of octaethylporphyrin Cu (II) was slow yielding meso-mono and dibromo derivatives as major products. Prolongation of the reaction time resulted in the formatio

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42

Tandon, Manju, Piyush Kumar, Haiyan Xia, Lili Wang та Leonard I. Wiebe. "Synthesis of Bromophenyl β-D-Glucuronides: Hydrophilic Precursors of Lipophilic Standards in the Analysis of Environmental Polychlorinated Biphenyls". Collection of Czechoslovak Chemical Communications 71, № 7 (2006): 1042–50. http://dx.doi.org/10.1135/cccc20061042.

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A rapid PCB-screening protocol, based on a combination of extraction techniques and instrumental nuclear activation analysis (INAA), required water soluble brominated internal standard that undergoes facile hydrolysis to a lipophilic brominated counterpart. Bromophenyl glucuronic acids 2, 3, 7 were synthesized for this application. Glucuronic acids 2 and 3 were prepared by bromination of phenyl β-D-glucopyranosiduronic acid in 81 and 54%, respectively, whereas compound 7 was prepared by coupling methyl 2,3,4-tri-O-acetyl-α-D-glucopyranosyluronate bromide (5) with 2,4,6-tribromophenol. Incubati

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43

Au, Heather, Noelia Rubio, and Milo S. P. Shaffer. "Brominated graphene as a versatile precursor for multifunctional grafting." Chemical Science 9, no. 1 (2018): 209–17. http://dx.doi.org/10.1039/c7sc03455e.

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A non-destructive and versatile chemical reduction method was used to dissolve and subsequently brominate few-layer graphene sheets (FLGs). The brominated FLGs provide a convenient precursor for the synthesis of a variety of directly functionalised graphenes.

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44

Yoneda, Tomoki, Naoki Aratani, and Atsuhiro Osuka. "Regioselective fabrications of a Möbius aromatic [28]hexaphyrin palladium(II) complex." Journal of Porphyrins and Phthalocyanines 17, no. 08n09 (2013): 665–72. http://dx.doi.org/10.1142/s1088424612501428.

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Regioselective nucleophilic chlorination and bromination of [26]hexaphyrin to produce a [28]Möbius aromatic hexaphyrin Pd ( II ) complex were accomplished upon treatment of [26]hexaphyrin 2 with chloride and bromide ions in the presence of an acid with concurrent molecular topology change from Hückel to Möbius. Stille coupling reaction of the resultant 3-brominated complex 4 with ethynylstannanes afforded β-ethynylated derivatives in moderate to high yields.

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Shao, Changdong, Chen Ma, Li Li, et al. "Copper-promoted C5-selective bromination of 8-aminoquinoline amides with alkyl bromides." Beilstein Journal of Organic Chemistry 20 (January 23, 2024): 155–61. http://dx.doi.org/10.3762/bjoc.20.14.

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An efficient and practical method for the synthesis of C5-brominated 8-aminoquinoline amides via a copper-promoted selective bromination of 8-aminoquinoline amides with alkyl bromides was developed. The reaction proceeds smoothly in dimethyl sulfoxide (DMSO) under air, employing activated and unactivated alkyl bromides as the halogenation reagents without additional external oxidants. This method features outstanding site selectivity, broad substrate scope, and excellent yields.

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46

Sochnev, V. S., Yu V. Koshchienko, T. A. Kuz'menko, A. A. Kolodina, G. S. Borodkin, and A. S. Morkovnik. "Bromination of 1(9)<i>H</i>-2,3-dihydroimidazo[1,2-<i>a</i>]benzimidazole and its <i>N</i>-derivatives." Журнал общей химии 93, no. 6 (2023): 858–66. http://dx.doi.org/10.31857/s0044460x23060045.

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2,3-Dihydro-1 H -imidazo[1,2- a ]benzimidazole in acetic acid, and its N 1-Me derivative in CHCl3, are brominated at position 6 with bromine. Less nucleophilic N 9-R derivatives do not enter into the reaction under these conditions, but, like their N 1-R isomers, they are quite effectively brominated by the KBrO3-HBr system, but at position 7, probably due to the transition of the reaction to the mode of bromination of protonated forms of substrates. N 1- and N 9-alkyl-6(7)-Br-2,3-dihydroimidazo[1,2- a ]benzimidazoles can also be obtained by N -alkylation of 6(7)-Br-2,3-dihydroimidazo[1,2- a ]

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Kim, Young Joon, Myung Jin Jeong, Ji Eun Kim, Insik In, and Chan Pil Park. "Microreactor-Mediated Benzylic Bromination in Concentrated Solar Radiation." Australian Journal of Chemistry 68, no. 11 (2015): 1653. http://dx.doi.org/10.1071/ch15238.

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Sunlight-induced bromination of benzylic compounds was conducted in a capillary microreactor, resulting in mono-brominated compounds with yields of up to 94 %. These reactions can be considered to be eco-friendly since they were carried out without an artificial light source or additional temperature control. In addition, up to 257.9 mmol could be produced daily using cost-effective molecular bromine, which leads to potential improvement of industrial processes.

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48

Jiang, Meijuan, Fuqiang Jin, Hao Zhang, Xiaolu Yi, and Xin Zhao. "Preparation of butyl bonded poly (styrene-divinylbenzene) microspheres by Grignard reaction." Journal of Physics: Conference Series 2808, no. 1 (2024): 012055. http://dx.doi.org/10.1088/1742-6596/2808/1/012055.

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Abstract The alkylated poly(styrene-divinylbenzene) (PSD) microspheres are attractive chromatographic column packings for high-performance liquid chromatography. In this paper, the butyl bonded PSD microspheres were prepared by the reaction of brominated PSD microspheres with n-butylmagnesium bromide. Fourier transform infrared (FTIR) spectroscopy and solid-state 13C nuclear magnetic resonance (NMR) spectroscopy were used to analyze the polymers. FTIR spectra analysis could establish the occurrence of bromination of PSD microspheres and the reaction of brominated PSD microspheres with n-butylm

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49

Gui, Qing-Wen, Hongmei Jiang, Dingyi Guo, et al. "Ultrasound-Promoted and Base-Mediated Regioselective Bromination of Imidazo[1,2-a]pyridines with Pyridinium Tribromide." Synthesis 52, no. 18 (2020): 2713–20. http://dx.doi.org/10.1055/s-0040-1707856.

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By using pyridinium tribromide as the bromo source, an efficient and practical protocol for the synthesis of C3-brominated imidazo[1,2-a]pyridines through ultrasound-promoted and Na2CO3-mediated regioselective bromination of imidazo[1,2-a]pyridines has been developed. This method effectively avoids the use of metal catalysts and harsh reaction conditions, and shows attractive characteristics such as operational simplicity, broad substrate scope with good to excellent yields, ease of scale-up and high energy efficiency.

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50

Plotnikova, R. N. "Disadvantageous phthalates from production waste as the basis for the synthesis of plasticizer-antipyrin." Proceedings of the Voronezh State University of Engineering Technologies 84, no. 1 (2021): 202–7. http://dx.doi.org/10.20914/2310-1202-2022-1-202-207.

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The possibility of using unsaturated phthalates obtained by the esterification of phthalic anhydride with distillation residues of butyl alcohols as a basis for the synthesis of a bromine-containing plasticizer-fire retardant was evaluated. prene, polyvinyl chloride, and polyvinyl acetate. Instability of the content of unsaturated esters of phthalic acid in the test object was noted with the most probable range of fluctuations in iodine number, ranging from 24.4 to 44.4. A direct dependence of the indicated variation limits on the content of 2-ethylhexene-3-ol-1 in the distillation residue of

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