3-CHLORO-4-(TRIFLUOROMETHOXY)BENZALDEHYDE Chemical Properties

Boiling point:

232.9±40.0 °C(Predicted)

Density 

1.42g/ml

storage temp. 

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

form 

liquid

color 

Clear, colourless

Water Solubility 

Insoluble in water.

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

Hazard Note 

Irritant

HS Code 

2913000090

3-CHLORO-4-(TRIFLUOROMETHOXY)BENZALDEHYDE Usage And Synthesis

Uses

3-Chloro-4-(trifluoromethyl)benzaldehyde is used in synthesis of organic compunds in γ-Aminobutyrate-A Receptor Modulation by 3-Aryl-1-(arylsulfonyl)- 1,4,5,6-tetrahydropyridazines.

Synthesis

The general procedure for the synthesis of 3-chloro-4-trifluoromethylbenzonitrile from 3-chloro-4-trifluoromethylbenzaldehyde was as follows: at 0 °C, using a syringe, diisobutylaluminum hydride (1.0 M toluene solution, 28 mL, 28 mmol) was added slowly and dropwise to 3-chloro-4-(trifluoromethyl)benzonitrile (3.79 g, 18.4 mmol) in tetrahydrofuran (THF, 50 mL ) solution. The reaction mixture was kept at 0 °C for 2 h, followed by warming to room temperature and continued stirring for 2 h. The reaction was carried out on a cooled surface. Upon completion of the reaction, the mixture was cooled to 0 °C and the reaction was quenched with 3M aqueous hydrochloric acid solution (75 mL). The mixture was warmed to room temperature and stirred vigorously for 1.5 hours. Subsequently, the mixture was transferred to a dispensing funnel and diluted with ether (Et2O). The organic phase was separated, dried over anhydrous sodium sulfate (Na2SO4), filtered and concentrated under reduced pressure. Purification by fast chromatography (Analogix? IntelliFlash 280? system, using 15% ethyl acetate/hexane as eluent, SF40-150g column) gave 2.84 g (74% yield) of 3-chloro-4-trifluoromethylbenzaldehyde as a colorless oil. The structure of the product was confirmed by 1H NMR (300 MHz, DMSO-d6): δ 10.09 (s, 1H), 8.21 (s, 1H), 8.12 (d, J = 8.1 Hz, 1H), 8.07-8.02 (m, 1H).

References

[1] Patent: US2009/124666, 2009, A1. Location in patent: Page/Page column 30-32

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