3-Bromo-4-methyl-1H-pyrazole

Name: 3-Bromo-4-methyl-1H-pyrazole
Brand: ChemScene
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CAS No. 5932-20-7
Cat. No. CS-0035699
Purity≥96%
MDL No.MFCD12755927

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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+
Accessible (Haz class 3, 4, 5 or 8), International	$238.00+

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Structure of 5932-20-7

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Description

3-Bromo-4-methyl-1H-pyrazole is a heterocyclic building block featuring a bromine substituent at the 3-position and a methyl group at the 4-position, enabling diverse downstream functionalization. This bench-stable pyrazole integrates readily into medicinal chemistry campaigns, offering a rigid, electron-deficient core for targeted ligand design and transition-metal-catalyzed coupling reactions.

Application

3-Bromo-4-methyl-1H-pyrazole serves as a versatile building block in medicinal chemistry and synthetic organic chemistry, enabling efficient access to substituted pyrazole scaffolds. The bromine at C3 facilitates palladium-catalyzed cross-coupling reactions, while the methyl group at C4 provides steric and electronic modulation. Its bench-stable solid form and compatibility with diverse functional groups make it ideal for modular synthesis of bioactive molecules and heterocyclic libraries.

General Information

CAS No. 5932-20-7
Cat. No. CS-0035699
Purity ≥96%
MDL No. MFCD12755927
Storage Store at room temperature
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₄H₅BrN₂
Molecular Weight 161.00
Synonym(s) 3(5)-BroMo-4-Methylpyrazole
SMILES CC1=CNN=C1Br

Computational Chemistry Data

TPSA 28.68
LogP 1.48062
H_Acceptors 1
H_Donors 1
Rotatable_Bonds 0

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-P305+P351+P338-P330-P362+P364-P403+P233-P405-P501

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Other Classifications

Building Blocks Skeleton Aromatic heterocycle compounds Pyrazole compounds

Key Words

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3-Bromo-4-methyl-1H-pyrazole

CAS No. 5932-20-7

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