2,5-DIMETHOXYBENZONITRILE

2,5-DIMETHOXYBENZONITRILE Property

Melting point:

81-85 °C (lit.)

Boiling point:

288.8±25.0 °C(Predicted)

Density 

1.12±0.1 g/cm3(Predicted)

storage temp. 

Sealed in dry,Room Temperature

solubility 

soluble in Methanol

form 

powder to crystal

color 

White to Yellow to Orange

BRN 

2691937

CAS DataBase Reference

5312-97-0(CAS DataBase Reference)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36/37

RIDADR 

3276

WGK Germany 

3

HazardClass 

6.1

PackingGroup 

III

HS Code 

29269090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H312Harmful in contact with skin

H315Causes skin irritation

H319Causes serious eye irritation

H331Toxic if inhaled

H335May cause respiratory irritation

Precautionary statements

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

P280Wear protective gloves/protective clothing/eye protection/face protection.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

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

P405Store locked up.

2,5-DIMETHOXYBENZONITRILE Chemical Properties,Usage,Production

Synthesis

At 0 °C, n-butyllithium (1.67 M hexane solution, 2.9 mL, 4.8 mmol) was slowly added dropwise to a solution of 1,3-dimethoxybenzene (0.55 g, 4.0 mmol) in tetrahydrofuran (5 mL). The reaction mixture was stirred continuously at 0 °C for 2 hours. Subsequently, N,N-dimethylformamide (0.34 mL, 4.4 mmol) was added to the mixture and stirring was continued for 2 hours at 0 °C. Upon completion of the reaction, ammonia solution (8 mL, 120 mmol) and iodine (1.12 g, 4.4 mmol) were added and the mixture was transferred to room temperature and stirred for 2 hours. The reaction mixture was quenched with saturated aqueous sodium sulfite solution (15 mL) and extracted several times with ether (3 x 20 mL). The organic layers were combined, washed with saturated saline and dried over anhydrous sodium sulfate to give the crude product 2,6-dimethoxybenzonitrile with a purity of over 80%. The crude product was purified by silica gel short-column chromatography (eluent: hexane/ethyl acetate=3:1) to afford pure 2,6-dimethoxybenzonitrile as a colorless solid in 91% yield.

References

[1] Synlett, 2010, # 10, p. 1562 - 1566
[2] Tetrahedron, 2011, vol. 67, # 5, p. 958 - 964