ETHYL 5-CHLOROTHIOPHENE-2-CARBOXYLATE Chemical Properties

Boiling point:

70-71°C 1mm

Density 

1.312±0.06 g/cm3(Predicted)

refractive index 

1.5380

Flash point:

70-71°C/1mm

storage temp. 

under inert gas (nitrogen or Argon) at 2–8 °C

form 

clear liquid

color 

Colorless to Light yellow

BRN 

128707

CAS DataBase Reference

5751-82-6

Safety Information

Risk Statements 

36/38

Safety Statements 

26-36-37

HS Code 

29349990

MSDS

• Language:English Provider:ALFA

ETHYL 5-CHLOROTHIOPHENE-2-CARBOXYLATE Usage And Synthesis

Chemical Properties

Colorless to light yellow liquid

Synthesis

Concentrated sulfuric acid (15 mL) was slowly added to a stirring solution of 5-chlorothiophene-2-carboxylic acid (15 g, 0.0925 mol) in ethanol (300 mL) at room temperature. The reaction mixture was stirred continuously under anhydrous conditions for 16 hours. Upon completion of the reaction, the reaction mixture was concentrated by distillation under reduced pressure. The concentrate was diluted with ethyl acetate (300 mL) and the organic layer was subsequently washed sequentially with water (3 x 100 mL), saturated sodium bicarbonate solution (3 x 100 mL) and saturated saline (100 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure to give ethyl 5-chlorothiophene-2-carboxylate (14 g, 80% yield) as a colorless liquid.

References

[1] Patent: WO2015/18534, 2015, A1. Location in patent: Page/Page column 39
[2] Journal of the American Chemical Society, 1954, vol. 76, p. 5131
[3] Journal of the American Chemical Society, 1954, vol. 76, p. 5131
[4] Chemistry - A European Journal, 2016, vol. 22, # 1, p. 211 - 221

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• METHYL THIOPHENE-2-CARBOXYLATE