2-CHLORO-4,5-DIFLUOROBENZALDEHYDE Chemical Properties

Boiling point:

211.9±35.0 °C(Predicted)

Density 

1.453±0.06 g/cm3(Predicted)

storage temp. 

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

form 

crystalline solid

color 

Off-white to brown

CAS DataBase Reference

165047-23-4

Safety Information

HS Code 

2913000090

2-CHLORO-4,5-DIFLUOROBENZALDEHYDE Usage And Synthesis

Synthesis

Step 3 - Preparation of 2-chloro-4,5-difluorobenzaldehyde (110): (2-chloro-4,5-difluorophenyl)-methanol (120,240 g, 0.0134 mol) was dissolved in dichloromethane (40 mL) and Dess-Martin periodinane (6.84 g, 0.0161 mol) was added. The reaction mixture was stirred at room temperature for 10 minutes. After completion of the reaction, the mixture was poured into aqueous potassium carbonate solution and extracted with ethyl acetate. The organic layers were combined, dried with anhydrous sodium sulfate and filtered. The filtrate was concentrated under reduced pressure, and the resulting crude product was purified by silica gel column chromatography, using a 30% hexane solution of ethyl acetate as eluent, to give the white solid product 2-chloro-4,5-difluorobenzaldehyde (110, 1.7 g, 71.6% yield).

References

[1] Patent: WO2008/80001, 2008, A2. Location in patent: Page/Page column 77
[2] Patent: US2006/264433, 2006, A1. Location in patent: Page/Page column 21

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