- Preparation method of 2,4,6-tribromobenzoic acid
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The invention discloses a preparation method of high purity 2,4,6-tribromobenzoic acid. The preparation method is characterized by comprising the following steps: with pure water as a solvent, reacting m-aminobenzoic acid with bromine at 5-10 DEG C for ri
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Paragraph 0028-0030; 0039-0041
(2019/11/20)
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- Graphene Oxide Promoted Oxidative Bromination of Anilines and Phenols in Water
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The mildly acidic and oxidative nature of graphene oxide, with its large surface area available for catalytic activity, has been explored in aromatic nuclear bromination chemistry for the first time. The versatile catalytic activity of graphene oxide (GO) has been used to selectively and rapidly brominate anilines and phenols in water. The best results were obtained at ambient temperatures using molecular bromine in a protocol promoted by oxidative bromination catalyzed by GO; these transformations proceeded with 100% atom economy with respect to bromine and high selectivities for the tribromoanilines and -phenols. Reduced graphene oxide (r-GO) was observed to form after the second recycle (third use) of GO. This technique is also effective with N-bromosuccinimide (NBS) as the brominating reagent. In the case of NBS, reactions were instantaneous and the GO displayed excellent recyclability without any loss of activity over several cycles.
- Ghorpade, Prashant Vasantrao,Pethsangave, Dattatray Appasha,Some, Surajit,Shankarling, Ganapati Subray
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p. 7388 - 7397
(2018/07/29)
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- Effect of structural factors and solvent nature in bromination of anilines
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Reaction of electrophilic bromination of aniline containing various ortho, meta, and para substituents in the aromatic ring was studied. The optimal conditions for synthesis of mono-, di-, tri-, and tetrabromo derivatives of aniline and brominated analog of Aniline Black were found.
- Bagmanov
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experimental part
p. 1570 - 1576
(2011/06/20)
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- Oxidative bromination of aniline and its derivatives
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Oxidative bromination of aniline and its derivatives containing various substituents (CH3, Cl, NO2, COOH) in ortho, meta, and para positions with a brominating mixture of NaBr (KBr) and 20-22% hydrogen peroxide in 6-8% hydrochloric acid at the molar ratio aniline: NaBr (KBr): H 2O2: HCl = 1: 3.5: 3.2: 4.5 is described.
- Salakhov,Bagmanov,Umaeva,Bagmanova
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experimental part
p. 1479 - 1481
(2009/02/05)
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- Photoreaction of nitrobenzenes with hydrobromic acid
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Nitrobenzene and three derivatives (3-CO2H, 3-OH, and 4-OH) give tribromoanilines when irradiated in hydrobromic acid.
- McIntyre, Brian P.,Coleman, Brian D.,Wubbels, Gene G.
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p. 7709 - 7711
(2007/10/03)
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