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CAS RN: 111562-32-4 | Product Number: P1902


Purity: >97.0%(GC)
  • 5-(2-Aminophenyl)pyrazole
2   1   1  

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Product Number P1902
Purity / Analysis Method >97.0%(GC)
Molecular Formula / Molecular Weight C__9H__9N__3 = 159.19  
Physical State (20 deg.C) Solid
CAS RN 111562-32-4
Reaxys Registry Number 5320
PubChem Substance ID 125307613
MDL Number


Appearance Light yellow to Brown powder to crystal
Purity(GC) min. 97.0 %
Purity(Nonaqueous Titration) min. 95.0 %
Properties (reference)
Melting Point 129 °C
Pictogram Pictogram
Signal Word Warning
Hazard Statements H315 : Causes skin irritation.
H319 : Causes serious eye irritation.
Precautionary Statements P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ eye protection/ face protection.
P337 + P313 : If eye irritation persists: Get medical advice/ attention.
P305 + P351 + P338 : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P302 + P352 : IF ON SKIN: Wash with plenty of soap and water.
P332 + P313 : If skin irritation occurs: Get medical advice/ attention.
P362 : Take off contaminated clothing and wash before reuse.
Related Laws:
Transport Information:
HS Number 2933.19.4300
ortho-Directing Agent for Arylboronic Acids

Typical Procedure:
A mixture of phenylboronic acid (1) (0.25 mmol) and 2-(1H-pyrazol-5-yl)aniline (0.25 mmol) in toluene (1 mL) is heated under reflux with a Dean-Stark condenser for 1 h. After being cooled to room temperature, the solvent is evaporated in vacuo. To the residue, RuH2(CO)(PPh3)3 (0.0075 mmol) is added. After filling dry nitrogen in the glass tube, norbornene (1.25 mmol), triethylsilane (1.25 mmol) and toluene (0.13 mL) are added under a nitrogen atmosphere. The mixture is heated at 135 °C for 12 h. 2 is isolated by bulb-to-bulb distillation (280-290 °C / 4.7 mmHg, mp 138 °C, Y. 89%) as a white solid.


PubMed Literature


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