5-Bromo-1-methyl-1H-pyrazin-2-one

Name: 5-Bromo-1-methyl-1H-pyrazin-2-one
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CAS No. 1243288-53-0
Cat. No. CS-W006042
Molecule weight189.01
Purity≥98%
MDL No.MFCD16659841

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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-methyl-1H-pyrazin-2-one|CS-W006042

Structure of 1243288-53-0

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General Information

CAS No. 1243288-53-0
Cat. No. CS-W006042
Purity ≥98%
MDL No. MFCD16659841
Storage 4°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₅H₅BrN₂O
Molecular Weight 189.01
Synonym(s) 5-bromo-1-methylpyrazin-2-one
SMILES BrC1=CN(C(C=N1)=O)C

Description

5-Bromo-1-methyl-1H-pyrazin-2-one features a brominated pyrazinone core with enhanced electrophilicity at the C5 position, enabling efficient coupling in transition-metal-catalyzed cross-couplings. The methyl group stabilizes the heterocyclic scaffold under standard conditions, while the electron-deficient ring facilitates nucleophilic addition reactions. This bench-stable reagent integrates readily into synthetic sequences for pharmaceutical and agrochemical intermediates.

Application

5-Bromo-1-methyl-1H-pyrazin-2-one serves as a versatile building block in heterocyclic synthesis, enabling palladium-catalyzed cross-coupling reactions due to its bromine substituent. The methyl and carbonyl groups provide orthogonal functional handles for further derivatization, while the pyrazinone core offers stability and compatibility with standard reaction conditions. This compound facilitates efficient access to substituted pyrazinone scaffolds relevant to medicinal chemistry and agrochemical 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 34.89
LogP 0.5428
H_Acceptors 3
H_Donors 0
Rotatable_Bonds 0

Other Classifications

Building Blocks Skeleton Aromatic heterocycle compounds Pyrazine compounds

Key Words

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5-Bromo-1-methyl-1H-pyrazin-2-one

CAS No. 1243288-53-0

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