4-(3-METHYLPHENYL)BENZALDEHYDE

4-(3-METHYLPHENYL)BENZALDEHYDE Property

Melting point:

45-49℃

Boiling point:

332.9±21.0 °C(Predicted)

Density 

1.074±0.06 g/cm3(Predicted)

Flash point:

>110°(230°F)

storage temp. 

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

Appearance

Light yellow to brown Solid

Sensitive 

Air Sensitive

CAS DataBase Reference

400744-83-4(CAS DataBase Reference)

Safety

Hazard Codes 

Xi

Hazard Note 

Irritant

HS Code 

2912290090

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.

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.

4-(3-METHYLPHENYL)BENZALDEHYDE Chemical Properties,Usage,Production

Uses

4-Formyl-3''-methyl-1,1''-biphenyl acts as a reagent in the preparation of cyclodextrin-supported palladium complex that efficiently catalysis Suzuki-Miyaura cross coupling reactions.

Synthesis

General procedure for the synthesis of 3'-methyl-[1,1'-biphenyl]-4-carbaldehyde from 3-methylphenylboronic acid and 4-formylphenylboronic acid: arylboronic acid (0.5 mmol) and K2CO3 (1 mmol, 138.0 mg) were added to a 20 mL Schlenk tube fitted with a non-magnetic stir bar. The tube was evacuated twice and backfilled with N2. MeCN (2 mL) and I2 (0.75 mmol, 191 mg) were added to the tube at room temperature. The tube was sealed and placed in a preheated oil bath at 80 °C for 8-12 h under a stream of N2 gas for the reaction. After the reaction mixture was cooled to room temperature, acrylic boronic acid (0.75 mmol) and Pd(OAc)2 (0.025 mmol, 5.6 mg) were added and the mixture was stirred at 80 °C for 12-16 hours. After completion of the reaction, the mixture was cooled to room temperature and quenched by the addition of H2O (10 mL). The aqueous layer was extracted with EtOAc (3 x 5 mL). The organic phases were combined, dried with anhydrous Na2SO4, filtered and concentrated by rotary evaporation. The residue was purified by silica gel column chromatography to afford the target product 3'-methyl-[1,1'-biphenyl]-4-carbaldehyde. Experimental data are provided for three representative examples.

References

[1] Synlett, 2014, vol. 25, # 7, p. 995 - 1000