5-AMINO-1-(4-METHYLPHENYL)-1H-PYRAZOLE-4-CARBONITRILE Chemical Properties

Melting point:

116-120

Boiling point:

405.6±40.0 °C(Predicted)

Density 

1.23±0.1 g/cm3(Predicted)

storage temp. 

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

form 

powder to crystal

pka

-0.58±0.10(Predicted)

color 

White to Orange to Green

CAS DataBase Reference

103646-82-8(CAS DataBase Reference)

Safety Information

Hazard Codes 

Xi

HazardClass 

IRRITANT

HS Code 

2933199090

5-AMINO-1-(4-METHYLPHENYL)-1H-PYRAZOLE-4-CARBONITRILE Usage And Synthesis

Synthesis

GENERAL METHOD: p-Methylphenylhydrazine (0.001 mol) was mixed with 10 mL of ethanol, stirred and heated to reflux. Subsequently, ethoxymethylene malononitrile (0.001 mol) dissolved in 10 mL of ethanol was added slowly and dropwise. The reaction mixture was kept at reflux for 2 hours. After completion of the reaction, the mixture was poured into 50 mL of ice water. The precipitated solid product was collected by filtration and washed with cold water to give the final 5-amino-1-toluene-1H-pyrazole-4-carbonitrile in 61-80% yield.

References

[1] Medicinal Chemistry Research, 2018, vol. 27, # 8, p. 1876 - 1884
[2] Heterocyclic Communications, 2005, vol. 11, # 5, p. 385 - 388
[3] European Journal of Medicinal Chemistry, 2008, vol. 43, # 4, p. 771 - 780
[4] Journal of Organic Chemistry, 1956, vol. 21, p. 1240,1242
[5] Bioorganic and Medicinal Chemistry Letters, 2004, vol. 14, # 9, p. 2121 - 2125

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