5-Bromo-1-cyclopropyl-1H-pyrazole

Name: 5-Bromo-1-cyclopropyl-1H-pyrazole
Brand: ChemScene
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CAS No. 1517978-30-1
Cat. No. CS-0377578
Purity≥98%
MDL No.None

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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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5-Bromo-1-cyclopropyl-1H-pyrazole|CS-0377578

Structure of 1517978-30-1

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General Information

CAS No. 1517978-30-1
Cat. No. CS-0377578
Purity ≥98%
MDL No. None
Storage 4°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₆H₇BrN₂
Molecular Weight 187.04
Synonym(s) None
SMILES BrC1=CC=NN1C2CC2

Description

5-Bromo-1-cyclopropyl-1H-pyrazole features a brominated pyrazole core with a cyclopropyl substituent at the 1-position, delivering enhanced metabolic stability and tunable electronic properties. This scaffold integrates readily into bioactive molecules, serving as a key building block for medicinal chemistry campaigns targeting kinase inhibitors and CNS modulators. The cyclopropyl group imparts conformational rigidity, while the bromine enables facile cross-coupling functionalization under standard conditions.

Application

5-Bromo-1-cyclopropyl-1H-pyrazole serves as a versatile building block in medicinal chemistry, enabling palladium-catalyzed cross-coupling reactions due to its stable bromo functionality. The cyclopropyl group enhances metabolic stability and modulates lipophilicity, while the pyrazole core provides a rigid, hydrogen-bond-capable scaffold. This compound exhibits excellent bench stability, facilitates straightforward purification, and functions reliably in standard Suzuki, Stille, and Negishi coupling protocols for constructing complex heterocyclic architectures.

Safety Information

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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+P364-P405-P501

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Computational Chemistry Data

TPSA 17.82
LogP 1.9805
H_Acceptors 2
H_Donors 0
Rotatable_Bonds 1

Other Classifications

Building Blocks Skeleton Aromatic heterocycle compounds Pyrazole compounds

Building Blocks Skeleton Fatty ring compounds Cyclopropane compounds

Key Words

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5-Bromo-1-cyclopropyl-1H-pyrazole

CAS No. 1517978-30-1

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