T-BUTYL 4-BROMOBUTYRATE Chemical Properties

Boiling point:

225.9±23.0 °C(Predicted)

Density 

1.258±0.06 g/cm3(Predicted)

storage temp. 

2-8°C(protect from light)

solubility 

soluble in Chloroform, Hexane

form 

liquid

color 

Colourless to light yellow

Safety Information

Risk Statements 

34-36/37/38

Safety Statements 

22-26-36/37/39-45

RIDADR 

1760

HazardClass 

8

PackingGroup 

Ⅲ

HS Code 

29033990

T-BUTYL 4-BROMOBUTYRATE Usage And Synthesis

Uses

t-Butyl 4-Bromobutyrate. is a potent CB1 receptor antagonist involved in the cannabinoid-1 receptor signalling process. Inhibition of this receptor has been demonstrated to inhibit feeding behaviors. Antiinflammatory.

Synthesis

The general procedure for the synthesis of tert-butyl 4-bromobutyrate from 4-bromobutyric acid and tert-butanol was as follows: 4-bromobutyric acid (2.57 g, 15.39 mmol, 1 eq.) was dissolved in dichloromethane (20 mL), magnesium sulfate (7.74 g, 64.30 mmol, 4.2 eq.), tert-butanol (5.70 g, 76.95 mmol, 5 eq.) and concentrated sulfuric acid (0.25 mL). The reaction mixture was stirred at room temperature for 2 days. Upon completion of the reaction, the reaction was quenched by the addition of saturated aqueous sodium bicarbonate and the reaction mixture was extracted with dichloromethane. The organic layers were combined, washed with saturated sodium chloride solution and dried over anhydrous sodium sulfate. The solvent was removed by concentration under reduced pressure to give the crude product. The crude product was purified by medium pressure silica gel column chromatography (eluent: n-hexane/ethyl acetate=50/50) to afford the target compound tert-butyl 4-bromobutyrate (1.17 g, 5.24 mmol, 47% yield). The structure of the product was confirmed by 1H NMR (400 MHz, CDCl3) and 13C NMR (100 MHz, CDCl3): 1H NMR δ 1.27 (s, 9H), 1.91-1.98 (m, 2H), 2.22 (t, 2H, J=7.2Hz), 3.27 (t, 2H, J=6.5Hz); 13C NMR δ 27.9 , 28.0, 32.8, 33.7, 80.5, 171.7.

References

[1] Tetrahedron Asymmetry, 2004, vol. 15, # 8, p. 1247 - 1258
[2] ACS Combinatorial Science, 2016, vol. 18, # 12, p. 710 - 722
[3] Angewandte Chemie - International Edition, 2010, vol. 49, # 15, p. 2738 - 2742
[4] European Journal of Organic Chemistry, 2003, # 8, p. 1486 - 1493
[5] Patent: US2018/52109, 2018, A1. Location in patent: Paragraph 0156; 0157; 0158; 0159

T-BUTYL 4-BROMOBUTYRATE (110661-91-1)Related Product Information

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