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ChemicalBook--->CAS DataBase List--->854626-32-7

854626-32-7

854626-32-7 Structure

854626-32-7 Structure
IdentificationBack Directory
[Name]

4,5-Dibromo-3-methylthiophene-2-carboxylic acid
[CAS]

854626-32-7
[Synonyms]

4,5-dibromo-3-methyl-2-Thiophenecarboxylic acid
4,5-Dibromo-3-methylthiophene-2-carboxylic acid
[Molecular Formula]

C6H4Br2O2S
[MOL File]

854626-32-7.mol
[Molecular Weight]

299.97
Chemical PropertiesBack Directory
[storage temp. ]

under inert gas (nitrogen or Argon) at 2–8 °C
Safety DataBack Directory
[Symbol(GHS) ]


GHS07
[Signal word ]

Warning
[Hazard statements ]

H315-H319-H335
[Precautionary statements ]

P261-P305+P351+P338
Raw materials And Preparation ProductsBack Directory
[Raw materials]

Ethyl acetate
Hazard InformationBack Directory
[Preparation]

4,5-Dibromo-3-methyl-2-thiophenecarboxylic acid synthesis: 4,5-dibromo-3-methyl-2-thiophenecarbonitrile (26.2 g, 92.2 mmol), EtOH (175 mL), water (175 mL), and NaOH (18.6 g, 466 mmol) were stirred together at 80°C for 1 h. The solvent was removed, the solids were collected by filtration, dissolved in water, and washed with CH2Cl2. The water layer was acidified with 37% HCl, the white solid was collected by filtration and dried under vacuum at 60°C to give 25.9 g (94% wt.) of 4,5-dibromo-3-methyl-2-thiophenecarboxylic acid: m.p. 225-226°C; 1H NMR (CDCl3) 2.5 (s).
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