2-Chloro-5-fluoropyrazine

Name: 2-Chloro-5-fluoropyrazine
Brand: ChemScene
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CAS No. 959019-05-7
Cat. No. CS-0159646
Purity≥95%
MDL No.MFCD09607701

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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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Structure of 959019-05-7

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Description

2-Chloro-5-fluoropyrazine is a heterocyclic building block featuring complementary halogen substituents at adjacent positions, enabling sequential cross-coupling reactions. This electron-deficient pyrazine core facilitates efficient palladium-catalyzed transformations and serves as a key scaffold in the synthesis of bioactive compounds and functional materials.

Application

2-Chloro-5-fluoropyrazine serves as a versatile building block in medicinal chemistry, enabling palladium-catalyzed cross-coupling reactions due to its orthogonal halogen reactivity. The chloro and fluoro substituents facilitate sequential functionalization, while the pyrazine core provides a rigid, electron-deficient scaffold suitable for target-oriented synthesis. Its bench-stable nature and compatibility with standard reaction conditions make it ideal for constructing heterocyclic pharmacophores and advanced intermediates.

General Information

CAS No. 959019-05-7
Cat. No. CS-0159646
Purity ≥95%
MDL No. MFCD09607701
Storage 4°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₄H₂ClFN₂
Molecular Weight 132.52
Synonym(s) 5-Fluoro-2-chloropyrazine
SMILES FC1=CN=C(Cl)C=N1

Computational Chemistry Data

TPSA 25.78
LogP 1.2691
H_Acceptors 2
H_Donors 0
Rotatable_Bonds 0

Safety Information

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GHS Pictogram : N/A	GHS No : N/A
Signal Word : N/A	UN#: N/A
Class : N/A	Packing Group : N/A
Hazard Statements : N/A
Precautionary Statements : N/A

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Other Classifications

Building Blocks Functional Group Chloride

Building Blocks Skeleton Aromatic heterocycle compounds Pyrazine compounds

Key Words

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2-Chloro-5-fluoropyrazine

CAS No. 959019-05-7

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