1-(4-Fluorophenyl)-1H-pyrazole-4-carboxylic acid

Name: 1-(4-Fluorophenyl)-1H-pyrazole-4-carboxylic acid
Brand: ChemScene
Availability: InStock
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CAS No. 138907-81-0
Cat. No. CS-0183139
Purity≥96%
MDL No.MFCD07186399

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Type	HazMat Fee
Excepted Quantity	$0.00
FedEx Limited Quantities Ground	$0.00
Hazmat Ground shipping	$50.00+
Inaccessible (Haz class 6.1 or 9), Domestic	$68.00+
Accessible (Haz class 3, 4, 5 or 8), Domestic	$158.00+
Inaccessible (Haz class 6.1 or 9), International	$108.00+
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1-(4-Fluorophenyl)-1H-pyrazole-4-carboxylic acid|CS-0183139

Structure of 138907-81-0

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General Information

CAS No. 138907-81-0
Cat. No. CS-0183139
Purity ≥96%
MDL No. MFCD07186399
Storage Store at room temperature
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₁₀H₇FN₂O₂
Molecular Weight None
Synonym(s) 1-(4-FLUORO-PHENYL)-1H-PYRAZOLE-4-CARBOXYLIC ACID
SMILES C1=C(C=CC(=C1)N2C=C(C=N2)C(=O)O)F

Description

1-(4-Fluorophenyl)-1H-pyrazole-4-carboxylic acid features a fluorinated aryl group conjugated to a pyrazole core, delivering enhanced electron-withdrawing character and improved metabolic stability. This scaffold integrates readily into bioactive molecules, enabling efficient coupling in peptide and small-molecule synthesis under standard conditions.

Application

1-(4-Fluorophenyl)-1H-pyrazole-4-carboxylic acid serves as a versatile building block in medicinal chemistry, enabling the synthesis of bioactive heterocycles through standard coupling and functionalization reactions. Its fluorinated aryl moiety enhances metabolic stability and membrane permeability, while the carboxylic acid group facilitates direct derivatization or amide formation under common peptide coupling conditions. The compound exhibits excellent bench stability and is readily purified by recrystallization, making it suitable for scalable synthesis and structure–activity relationship studies.

Synthesis

Route1
- 138907-73-0
- ~%
- In-stock
  
  138907-81-0
References
- Mitsubishi Pharma Corporation Patent: EP1176140 A1, 2002 ; Location in patent: Page 46 ;

Safety Information

Download SDS

GHS Pictogram :	GHS No : GHS07
Signal Word : Warning	UN#: N/A
Class : N/A	Packing Group : N/A
Hazard Statements : H302-H315-H319-H335
Precautionary Statements : P261-P264-P270-P271-P280-P302+P352-P304+P340-P330-P362-P405-P501

Quality Control

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Computational Chemistry Data

TPSA 55.12
LogP 1.7096
H_Acceptors 3
H_Donors 1
Rotatable_Bonds 2

Other Classifications

Building Blocks Functional Group Carboxylic Acid

Building Blocks Skeleton Aromatic heterocycle compounds Pyrazole compounds

Building Blocks Skeleton Aromatic ring compounds Benzene compounds

Key Words

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1-(4-Fluorophenyl)-1H-pyrazole-4-carboxylic acid

CAS No. 138907-81-0

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