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

Name: 6-Chloro-4-methylpyridazin-3(2H)-one
Brand: ChemScene
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CAS No. 1834-27-1
Cat. No. CS-W018803
Purity≥98%
MDL No.MFCD13659416

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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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6-Chloro-4-methylpyridazin-3(2H)-one|CS-W018803

Structure of 1834-27-1

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General Information

CAS No. 1834-27-1
Cat. No. CS-W018803
Purity ≥98%
MDL No. MFCD13659416
Storage Store at room temperature
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₅H₅ClN₂O
Molecular Weight 144.56
Synonym(s) 6-chloro-4-methyl-2H-pyridazin-3-one
SMILES CC1=CC(Cl)=NNC1=O

Description

6-Chloro-4-methylpyridazin-3(2H)-one features a chlorinated pyridazinone core with a methyl group at the 4-position, delivering enhanced electron-withdrawing character and improved metabolic stability. This scaffold integrates readily into bioactive molecules, serving as a key building block for pharmaceutical intermediates requiring high functional group tolerance and thermal resilience under standard conditions.

Application

6-Chloro-4-methylpyridazin-3(2H)-one serves as a versatile building block in medicinal chemistry, enabling efficient access to heterocyclic scaffolds through nucleophilic substitution and cross-coupling reactions. Its chlorine atom at the C6 position provides high reactivity for late-stage functionalization, while the pyridazinone core offers favorable solubility and metabolic stability. The molecule exhibits excellent bench stability and is compatible with standard purification methods, facilitating integration into complex 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-P305+P351+P338-P330-P362+P364-P403+P233-P405-P501

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Computational Chemistry Data

TPSA 45.75
LogP 0.73172
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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6-Chloro-4-methylpyridazin-3(2H)-one

CAS No. 1834-27-1

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