3-Furanboronic acid pinacol ester Chemical Properties

Melting point:

62-65 °C (lit.)

Boiling point:

255.0±13.0 °C(Predicted)

Density 

1.03±0.1 g/cm3(Predicted)

storage temp. 

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

solubility 

Chloroform (Slightly), Methanol (Slightly)

form 

crystal

color 

white

CAS DataBase Reference

248924-59-6(CAS DataBase Reference)

Safety Information

Safety Statements 

24/25

WGK Germany 

3

HS Code 

2932190090

MSDS

• Language:English Provider:SigmaAldrich

3-Furanboronic acid pinacol ester Usage And Synthesis

Uses

2-(furan-3-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane is a useful research chemical.

Chemical Properties

Furan-3-boronic acid pinacol ester is white to off-white solid powder at room temperature and pressure, it is insoluble in water but soluble in most organic solvents. It has high chemical reactivity, it has rich electron cloud density and is sensitive to strong oxidizing agents. Its chemical reaction activity mainly focuses on the borate unit in its structure, which can participate in oxidation, coupling and other reactions.

Synthesis

GENERAL METHOD: 3-bromofuran (1 mmol), pinacol ester of bisboronic acid (1.2 mmol) and dioxane (5 mL) were added to a 25 mL round bottom flask. KOAc (2 mmol) was then added and the mixture was stirred for 5 min at room temperature. PdII-TpTP catalyst (0.15 mol%) was added and the reaction mixture was placed in an oil bath preheated to 110 °C and refluxed with continuous stirring in the open system. The reaction progress was monitored by thin layer chromatography (TLC). Upon completion of the reaction, the mixture was cooled to room temperature, diluted with water (20 mL) and extracted with tert-butyl methyl ether (3 x 10 mL). The organic layers were combined and concentrated to give the crude product. The crude product was purified by silica gel column chromatography using a mixture of ethyl acetate and hexane (1:30) as eluent.

References

[1] Organic Letters, 2014, vol. 16, # 17, p. 4562 - 4565
[2] Journal of the American Chemical Society, 2017, vol. 139, # 2, p. 607 - 610
[3] Synlett, 2018, vol. 29, # 8, p. 1055 - 1060

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