Benzo[b]thiophene-2-carboxylic acid, 7-bromo-

Benzo[b]thiophene-2-carboxylic acid, 7-bromo- Property

storage temp. 

2-8°C(protect from light)

form 

solid

color 

White

Safety

HazardClass 

IRRITANT

HS Code 

2916399090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Benzo[b]thiophene-2-carboxylic acid, 7-bromo- Chemical Properties,Usage,Production

Synthesis

General procedure for the synthesis of 7-bromobenzo[b]thiophene-2-carboxylic acid from methyl 7-bromobenzo[b]thiophene-2-carboxylate: 7-bromobenzo[b]thiophene-2-carboxylic acid methyl ester (64 mg, 0.22 mmol) was dissolved in methanol (3 mL), followed by addition of 3 N sodium hydroxide solution (240 μL, 0.72 mmol). The reaction mixture was heated to reflux for 2 hours. Upon completion of the reaction, the reaction mixture was acidified with 3 N hydrochloric acid and extracted with ethyl acetate (30 mL). The organic phases were combined, dried over anhydrous sodium sulfate (Na2SO4) and concentrated under reduced pressure. 7-Bromobenzo[b]thiophene-2-carboxylic acid (62 mg, 0.24 mmol, 100% yield) was obtained as a white solid and did not require further purification by silica gel column chromatography.

References

[1] Patent: KR2015/117318, 2015, A. Location in patent: Paragraph 0181; 0192; 0193; 0194
[2] European Journal of Medicinal Chemistry, 2017, vol. 125, p. 538 - 550
[3] Patent: WO2003/104227, 2003, A1. Location in patent: Page 47, 48
[4] Patent: EP2926660, 2015, A1. Location in patent: Paragraph 0262; 0263