4-fluoro-2-hydroxybenzonitrile

4-fluoro-2-hydroxybenzonitrile Property

Boiling point:

266.5±25.0 °C(Predicted)

Density 

1.34±0.1 g/cm3(Predicted)

storage temp. 

Inert atmosphere,Room Temperature

pka

6.17±0.10(Predicted)

Appearance

Off-white to light brown Solid

InChI

InChI=1S/C7H4FNO/c8-6-2-1-5(4-9)7(10)3-6/h1-3,10H

InChIKey

ZAYFMRICIYQIAP-UHFFFAOYSA-N

SMILES

C(#N)C1=CC=C(F)C=C1O

Safety

HS Code 

2926907090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

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

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

4-fluoro-2-hydroxybenzonitrile Chemical Properties,Usage,Production

Uses

2-Cyano-5-fluorophenol is used in the study of substituent effect on fluorobenzene derivatives on cytochrome P 450-catalyzed hydroxylation at adjacent ortho aromatic carbon center.

Synthesis

General procedure for the synthesis of 4-fluoro-2-hydroxybenzonitrile from 2-methoxy-4-fluorobenzonitrile: A mixture of 4-fluoro-2-methoxybenzonitrile (4.53 g, 30 mmol) and aluminum trichloride (5.0 g, 37.6 mmol; purchased from Aldrich) in anhydrous toluene (30 mL) was stirred and reacted for 18 hours at 130 °C. After completion of the reaction, the mixture was cooled to room temperature, ice water (~50 mL) was added, and extracted with ether (20 mL × 2). The organic phases were combined, washed sequentially with water and saturated brine, and then dried with anhydrous magnesium sulfate. After concentration under reduced pressure, 4-fluoro-2-hydroxybenzonitrile (3.90 g, 28.5 mmol, 95% yield) was obtained as a white solid. Its structure was confirmed by the following characterization: 1H NMR (DMSO-d6, 300 MHz) δ ppm: 6.74-6.84 (2H, m, Ar-H), 7.71 (1H, dd, J = 7 Hz, J = 8.5 Hz, Ar-H), 11.64 (1H, s, OH); 13C NMR (DMSO-d6, 75.5 MHz) δ ppm: 95.13, 102.45, 102.78, 106.53, 106.83, 115.53, 134.68, 134.84, 161.41, 161.58, 163.00, 166.35. The calculated value of the high-resolution mass spectrometry (ESI-) for C7H3NOF (M-H) was 136.0199 and the measured value was 136.0199.

References

[1] Patent: US2005/267105, 2005, A1. Location in patent: Page/Page column 67
[2] Patent: US2007/111984, 2007, A1. Location in patent: Page/Page column 33
[3] Patent: WO2007/64316, 2007, A1. Location in patent: Page/Page column 153
[4] Patent: WO2007/39172, 2007, A1. Location in patent: Page/Page column 157-158
[5] Patent: US2008/261979, 2008, A1. Location in patent: Page/Page column 74