5-(2-FURYL)ISOXAZOLE-3-CARBOXYLIC ACID Chemical Properties

Melting point:

151 °C

Boiling point:

418.4±35.0 °C(Predicted)

Density 

1.420±0.06 g/cm3(Predicted)

storage temp. 

Sealed in dry,Store in freezer, under -20°C

pka

3.33±0.10(Predicted)

Appearance

White to yellow Solid

CAS DataBase Reference

98434-06-1(CAS DataBase Reference)

Safety Information

Risk Statements 

36/37/38

Safety Statements 

22-26-36/37/39

HazardClass 

IRRITANT

HS Code 

2932190090

5-(2-FURYL)ISOXAZOLE-3-CARBOXYLIC ACID Usage And Synthesis

Synthesis

General procedure for the synthesis of 5-(2-furanyl)isoxazole-3-carboxylic acid from ethyl 5-(furan-2-yl)isoxazole-3-carboxylate: 1N aqueous lithium hydroxide solution (80 mL) was slowly added to a mixed solution of THF (130 mL) and methanol (25 mL) containing ethyl 5-(furan-2-yl)isoxazole-3-carboxylate (4.14 g). The reaction mixture was stirred at room temperature for 15 hours. Upon completion of the reaction, the solvent was removed by distillation under reduced pressure. The residue was acidified by adding 1N hydrochloric acid to the residue until a solid precipitated. The solid product was collected by filtration and washed with distilled water. After drying, 3.22 g of 5-(2-furyl)isoxazole-3-carboxylic acid (yield: 90%) was obtained as a white solid. [178] 1H-NMR (acetone-d6, 200 MHz) δ: 7.90-7.86 (m, 1H), 7.19 (d, 1H), 7.00 (s, 1H), 6.77-6.73 (m, 1H).

References

[1] Patent: WO2009/5269, 2009, A2. Location in patent: Page/Page column 18
[2] Patent: US2009/131336, 2009, A1. Location in patent: Page/Page column 12
[3] Patent: WO2007/78113, 2007, A1. Location in patent: Page/Page column 36
[4] Gazzetta Chimica Italiana, 1958, vol. 88, p. 879,896

5-(2-FURYL)ISOXAZOLE-3-CARBOXYLIC ACID(98434-06-1)Related Product Information

• ETHYL 5-(2-FURYL)ISOXAZOLE-3-CARBOXYLATE
• 5-(2-FURYL)ISOXAZOLE-3-CARBOXYLIC ACID
• [5-(2-FURYL)ISOXAZOL-3-YL]METHANOL
• 5-(2-FURYL)ISOXAZOLE-3-CARBALDEHYDE