2,5-Bis(trifluoromethyl)nitrobenzene Chemical Properties

Boiling point:

70-75 °C (15 mmHg)

Density 

1.57

refractive index 

1.4235-1.4255

Flash point:

77 °C

storage temp. 

2-8°C

solubility 

Chloroform, Methanol

form 

Liquid

color 

Pale yellow to yellow

Sensitive 

Light Sensitive

CAS DataBase Reference

320-88-7(CAS DataBase Reference)

Safety Information

Hazard Codes 

Xi,T

Risk Statements 

36/37/38

Safety Statements 

37/39-26-60-37-23

HazardClass 

TOXIC

HS Code 

29049090

MSDS

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2,5-Bis(trifluoromethyl)nitrobenzene Usage And Synthesis

Chemical Properties

clear yellow liquid

Uses

2,5-Bis(Trifluoromethyl)nitrobenzene can be prepared to be used as antifungal agents.

Synthesis

General Steps: Example 2: Using 2,3-difluorotoluene as raw material, adopting the same reaction conditions as in Example 1, but replacing 96 mass% sulfuric acid with fuming sulfuric acid with a sulfur trioxide concentration of 10 mass%, the reaction was stirred at 80° C. for 8 hours to obtain 2,5-bis(trifluoromethyl)nitrobenzene in a yield of 68.7%. Example 4: Using 2,3-difluorotoluene as raw material, the same reaction conditions as in Example 1 were used, but 96 mass% of sulfuric acid was replaced with fuming sulfuric acid having a sulfur trioxide concentration of 10 mass%, and 97 mass% of fuming nitric acid was replaced with 98 mass% of concentrated nitric acid, and the reaction was stirred at 80°C for 10 hours to obtain 2,5-bis(trifluoromethyl)nitrobenzene in a yield of 65.3%. Example 7 (Comparative Example): Using 2,3-difluorotoluene as raw material and the same reaction conditions as in Example 1, but replacing 96 mass% sulfuric acid with fuming sulfuric acid with a sulfur trioxide concentration of 24 mass%, 2,5-bis(trifluoromethyl)nitrobenzene was obtained in a yield of 32.5%.

References

[1] Patent: EP1468983, 2004, A1. Location in patent: Page 6
[2] Patent: EP1468983, 2004, A1. Location in patent: Page 5; 6
[3] Journal of the American Chemical Society, 1953, vol. 75, p. 4967
[4] Journal of Organic Chemistry, 1995, vol. 60, # 22, p. 7348 - 7350
[5] Patent: WO2011/150156, 2011, A2. Location in patent: Page/Page column 132

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