4-Bromo-6-methylpyridazin-3(2H)-one

Name: 4-Bromo-6-methylpyridazin-3(2H)-one
Brand: ChemScene
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CAS No. 954240-46-1
Cat. No. CS-D0156
Purity≥95%
MDL No.MFCD09701342

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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-6-methylpyridazin-3(2H)-one|CS-D0156

Structure of 954240-46-1

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General Information

CAS No. 954240-46-1
Cat. No. CS-D0156
Purity ≥95%
MDL No. MFCD09701342
Storage Store at room temperature
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₅H₅BrN₂O
Molecular Weight 189.01
Synonym(s) 5-bromo-3-methyl-1H-pyridazin-6-one
SMILES O=C1C(Br)=CC(C)=NN1

Description

4-Bromo-6-methylpyridazin-3(2H)-one features a brominated pyridazinone core with a methyl group at the 6-position, offering a sterically hindered, electron-deficient heterocyclic scaffold. This structure enables direct coupling in late-stage functionalization and serves as a robust building block for medicinal chemistry campaigns targeting kinase inhibitors and CNS-active compounds.

Application

4-Bromo-6-methylpyridazin-3(2H)-one serves as a versatile building block in medicinal chemistry, enabling efficient access to substituted pyridazinone scaffolds. Its bromine substituent facilitates palladium-catalyzed cross-coupling reactions, while the lactam functionality offers hydrogen-bonding capacity and metabolic stability. The methyl group enhances lipophilicity and provides steric control in downstream transformations. This compound exhibits excellent bench stability, simplifies purification, and functions reliably in standard synthetic workflows for API development.

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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Computational Chemistry Data

TPSA 45.75
LogP 0.84082
H_Acceptors 2
H_Donors 1
Rotatable_Bonds 0

Other Classifications

Building Blocks Skeleton Aromatic heterocycle compounds Pyridazine compounds

Key Words

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4-Bromo-6-methylpyridazin-3(2H)-one

CAS No. 954240-46-1

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