4-Bromo-5-chloro-1-methyl-1H-pyrazole

Name: 4-Bromo-5-chloro-1-methyl-1H-pyrazole
Brand: ChemScene
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CAS No. 1350323-81-7
Cat. No. CS-0616151
Purity≥97%
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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4-Bromo-5-chloro-1-methyl-1H-pyrazole|CS-0616151

Structure of 1350323-81-7

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General Information

CAS No. 1350323-81-7
Cat. No. CS-0616151
Purity ≥97%
MDL No. None
Storage 4°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₄H₄BrClN₂
Molecular Weight 195.44
Synonym(s) None
SMILES CN1N=CC(Br)=C1Cl

Description

4-Bromo-5-chloro-1-methyl-1H-pyrazole features a halogenated pyrazole core with complementary bromo and chloro substituents at adjacent positions, enabling selective coupling in cross-coupling reactions. The methyl group enhances solubility and stabilizes the heterocyclic ring under standard conditions. This scaffold serves as a key building block for bioactive molecules in medicinal chemistry and agrochemical development.

Application

4-Bromo-5-chloro-1-methyl-1H-pyrazole serves as a versatile heterocyclic building block in medicinal chemistry and agrochemical synthesis. Its complementary halogenation pattern enables sequential cross-coupling reactions, while the methyl group provides a handle for further functionalization. The compound exhibits good bench stability and facilitates efficient Pd-catalyzed transformations, making it well-suited for constructing complex molecular architectures in multi-step synthetic sequences.

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 1.836
H_Acceptors 2
H_Donors 0
Rotatable_Bonds 0

Other Classifications

Building Blocks Functional Group Bromide

Building Blocks Skeleton Aromatic heterocycle compounds Pyrazole compounds

Drug Discovery Cancer PRMT5

Key Words

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4-Bromo-5-chloro-1-methyl-1H-pyrazole

CAS No. 1350323-81-7

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