3,5-Dimethyl-4-iodopyrazole Chemical Properties

Melting point:

136-140 °C

Boiling point:

297.3±35.0 °C(Predicted)

Density 

1.920±0.06 g/cm3(Predicted)

storage temp. 

Keep in dark place,Sealed in dry,Room Temperature

form 

powder to crystal

pka

14.11±0.50(Predicted)

color 

White to Almost white

Sensitive 

Light Sensitive

λmax

223nm(EtOH)(lit.)

CAS DataBase Reference

2033-45-6(CAS DataBase Reference)

Safety Information

Hazard Codes 

Xi

Risk Statements 

37/38-41

Safety Statements 

24/25-39-26

WGK Germany 

3

RTECS 

UQ6517000

HazardClass 

IRRITANT

HS Code 

29331990

Toxicity

mouse,LD50,intraperitoneal,550mg/kg (550mg/kg),Farmakologiya i Toksikologiya Vol. 25, Pg. 27, 1962.

MSDS

• Language:English Provider:ACROS
• Language:English Provider:ALFA

3,5-Dimethyl-4-iodopyrazole Usage And Synthesis

Chemical Properties

white crystalline chunks

Synthesis

In a 250 mL round bottom flask, 3,5-dimethyl-1H-pyrazole (0.5 g, 5 mmol), iodine (I2, 0.79 g, 30 mmol) and ceric ammonium nitrate (CAN, 1.71 g, 3 mmol) were dissolved in 70 mL of acetonitrile (CH3CN). The reaction mixture was stirred at room temperature for 16 hours. After completion of the reaction, the solvent was removed by rotary evaporator. The residue was dissolved in ethyl acetate (AcOEt) and washed sequentially with 10% aqueous sodium thiosulfate (Na2S2O3) and saturated saline. The aqueous phase was extracted once more with ethyl acetate, all organic phases were combined, dried over anhydrous sodium sulfate (Na2SO4), filtered and concentrated to dryness to afford 1.15 g (100% yield) of crude 4-iodo-3,5-dimethyl-1H-pyrazole, which was used in the subsequent reaction without further purification.LC-MS (MH+): 223.

References

[1] Patent: WO2006/128692, 2006, A2. Location in patent: Page/Page column 76
[2] Canadian Journal of Chemistry, 1992, vol. 70, # 4, p. 1121 - 1128
[3] Tetrahedron Letters, 2005, vol. 46, # 40, p. 6833 - 6837
[4] Tetrahedron Letters, 2001, vol. 42, # 5, p. 863 - 865
[5] Synthesis, 2001, # 11, p. 1711 - 1715

3,5-Dimethyl-4-iodopyrazole(2033-45-6)Related Product Information

• Xylene
• Dimethyl sulfoxide
• Pyraclostrobin
• N,N-Dimethylformamide
• 4-Iodopyrazole
• ETHANE
• Dimethyl ether
• Dimethyl carbonate
• Dimethyl sulfate
• 5-Methyl-2-phenyl-1,2-dihydropyrazol-3-one
• Dimethyl fumarate
• Dimethyl phthalate
• 3,5-Dimethylpyrazole
• Zolpidem tartrate
• Dacthal
• Pyrazole
• Zolpidem
• 3-(4-Iodo-3,5-dimethyl-1H-pyrazol-1-yl)-propanoic acid