An instant and facile bromination of industrially-important aromatic compounds in water using recyclable CaBr2–Br2 system

Kumar, Lalit; Mahajan, Tanu; Agarwal, D. D.

doi:10.1039/c1gc15359e

Cited by 44 publications

(29 citation statements)

References 61 publications

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“…All starting materials were obtained from Shanghai Chemical Reagent Co. Ltd (Shanghai China) and were used without further purification. 5,7‐Dibromo‐8‐Hydroxyquinoline, 1,4‐bis(octyloxy)‐2,5‐divinylbenzene ( 7 ) and 9,9‐dioctyl‐2,7‐ divinyl‐fluorene ( 8 ) were prepared according to the literature methods. Triethylamine was purified by distillation over KOH.…”

Section: Methodsmentioning

confidence: 99%

Novel D − π − A dye sensitizers of polymeric metal complexes based on 8‐hydroxyquinoline and phenylethyl or fluorene units: synthesis, characterization and photovoltaic applications for dye‐sensitized solar cells

Jin

Tang

et al. 2013

Applied Organom Chemis

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Four novel donor À p-bridge À acceptor (D À p À A) polymeric metal complexes (P1-P4) based on 8-hydroxyquinoline metal complexes were synthesized and tested for their performance in dye-sensitized solar cells (DSSCs). The polymeric metal complexes dyes use alkoxy benzene or alkyl fluorene as the electron donor and C¼C as p linker; the 8-hydroxyquinoline derivative complex part was used as the electron acceptor and diaminomaleonitrile was used as ancillary ligand. The two strongly electron-withdrawing cyano groups in the polymer structure can provide an efficient charge transport in the intramolecular between donor and acceptor parts. The thermal, photophysical, electrochemical and photovoltaic properties of these copolymers were investigated by TGA, differential scanning calorimetry, cyclic voltammetry and cureent density-voltage curves, and the results showed that dye containing complex Zn(II) and alkoxy benzene unit benefited the generation of photocurrent and open-circuit voltages, and a maximum power conversion efficiency of 1.91% (P2) was obtained, with an open-circuit voltage of 0.71 V, a short-circuit current density of 4.23 mA cm À2 , and a fill factor of 38.6% under AM1.5G irradiation. The study results also show that the four polymers exhibit good thermal stability, indicating that these polymeric metal complexes are suitable for the fabrication processes of optoelectronic devices.

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Section: Methodsmentioning

confidence: 99%

Novel D − π − A dye sensitizers of polymeric metal complexes based on 8‐hydroxyquinoline and phenylethyl or fluorene units: synthesis, characterization and photovoltaic applications for dye‐sensitized solar cells

Jin

Tang

et al. 2013

Applied Organom Chemis

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“…Kumar L. et al have reported [51,52] about the selective bromination of various substituted aromatic compounds of industrial and pharmacological significance with the use of an aqueous solution of CaBr2Br2. The derivatives of anilines and phenols with such strong electron-acceptor groups as carbonyl, nitro showed the good reactivity with the brominating reagent, and in a short reaction time were brominated with good yield (92-98%) and purity (>99%).…”

Section: Scheme 32 схема 32mentioning

confidence: 99%

Bromination of Aromatic Amines

Mustafayeva

Kakhramanov

2019

IVKKT

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It is known that the antipyrenes, biological active substances (antitumor, antibacterial, antifungal, antiviral), pharmacological preparations on the basis of bromine-containing aromatic compounds are widely used in the industry. Considering this and increased demand for these substances the purpose of this work was to summarize and systematize the accumulated knowledge in this area. The article presents methods and reagent systems used in the bromination of aromatic amines. There have been described the bromination of aromatic amines with hydrogen bromide, sodium bromide, potassium bromide, ammonium bromide, copper (II) bromide, N-bromosuccinimide, N-bromosaccharin, polymer-supported halogenation agents, and difference of these methods from the point of view of the used oxidizer, the medium and the solvent, the catalyst, the regioselectivity, the quantity of bromine atoms in the obtained product. The influence of solvents, catalysts, the nature (electron-donor or electron-acceptor) and position (ortho-, meta-, para-) of the substituents in the aromatic ring, reaction conditions, molar ratio of the reagents, reaction temperature and carrying out time of bromination reaction of aromatic amines has been shown. The bromination reactions courses of aromatic amines in different solvents, in solvent free conditions, in solid states has been described. The bromination of aromatic amines under thermal, microwave, ultraviolet radiation conditions has been studied. In the paper the regioselective monobromination and also obtaining of di-, tri- bromo derivatives of aromatic amines has been shown. Taking into account today's priority to environmentally safe methods of bromination of aromatic amines they have been also mentioned. Given the above, in our opinion, the information presented in this article will help to optimize the production of bromo derivatives of aromatic amines used in industry, technics and technology.

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“…The synthesis followed the methodology described in the literature [39,40]. In a flask containing 5 mL of water at 40 °C, under magnetic stirring, potassium bromide (7.14 g; 60 mmol), 4-toluenesulfonic acid monohydrate (7.61 g; 40 mmol), Nbromosuccinimide (7.12 g; 40 mmol) and 4-nitrophenol (2.78 g; 20 mmol) were mixed.…”

Section: Syntheses Of the Compounds 26-dibromo-4-nitrophenolmentioning

confidence: 99%

A simple protocol for the visual discrimination of natural cyclodextrins in aqueous solution using perichromic probes

Nandi

Nicoleti

Stock

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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An instant and facile bromination of industrially-important aromatic compounds in water using recyclable CaBr2–Br2 system

Cited by 44 publications

References 61 publications

Novel D − π − A dye sensitizers of polymeric metal complexes based on 8‐hydroxyquinoline and phenylethyl or fluorene units: synthesis, characterization and photovoltaic applications for dye‐sensitized solar cells

Novel D − π − A dye sensitizers of polymeric metal complexes based on 8‐hydroxyquinoline and phenylethyl or fluorene units: synthesis, characterization and photovoltaic applications for dye‐sensitized solar cells

Bromination of Aromatic Amines

A simple protocol for the visual discrimination of natural cyclodextrins in aqueous solution using perichromic probes

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