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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

2-Chloropyrazine | CAS 14508-49-7

A monochlorinated 1,4-diazine coupling partner used in published construction of pyrazine-linked triphenylamine derivatives. Its single chloride defines one attachment site, making chlorination-profile control relevant to reagent selection.

CAS14508-49-7
Molecular formulaC4H3ClN2
Molecular weight114.53 g/mol

Product overview

One chloride on the pyrazine ring gives this reagent a single halogen-bearing position for bond construction. The two ring nitrogens lie opposite each other, distinguishing pyrazine from the pyrimidine family. Published Suzuki chemistry uses 2-chloropyrazine to introduce this diazine unit into triphenylamine derivatives. It is also an upstream substrate for further chlorination to dichloropyrazines. Buyers should therefore specify the monochloro compound explicitly and review relevant more highly chlorinated components. Identity, chromatographic assay and the solvent or water limits required by a selected catalyst system provide a practical qualification package. The finished coupled molecule is evaluated separately for any intended material function.

Chemical identity

Chemical name
2-Chloropyrazine
CAS number
14508-49-7
Molecular formula
C4H3ClN2
Molecular weight
114.53 g/mol

Application context

In published Suzuki–Miyaura research, 2-chloropyrazine couples with 4-(diphenylamino)phenylboronic acid to form a pyrazine-containing triphenylamine derivative. The reagent contributes the electron-deficient diazine fragment, while its C–Cl position determines the new carbon–carbon connection.

Material qualification belongs at the coupling-feedstock stage. Review the monochloro identity and relevant chloropyrazine profile before comparing catalyst systems. If a route instead uses further chlorination, agree the starting assay and chlorinated-related-compound specification for that different transformation.

Chemistry and synthetic role

Pyrazine is a 1,4-diazine. Replacing its single C–Cl bond connects the incoming fragment at one defined carbon of the ring.

Quality review

Confirm the 1,4-diazine ring

Differentiate chloropyrazine from isomeric chloropyrimidines.

Review chlorination profile

Agree limits for relevant dichloropyrazines where they affect the intended transformation.

Match the coupling specification

Define assay basis and solvent or water controls required by the selected catalytic system.

Preparing a specification

Specify monochloropyrazine CAS 14508-49-7 with structural identity, chromatographic assay and route-relevant chlorination homologues. Include the intended coupling or further-chlorination use.

Packaging and storage

Packaging, closure and net weight are agreed for the selected grade, order quantity and destination. Confirm storage and transport requirements against the actual supplier SDS.

Documentation

Request a batch COA, specification, identity data and SDS. Confirm the availability of the analytical methods and any application-specific impurity results with the proposed supplier.

Procurement questions

Why is the pyrazine ring identity important?

Its nitrogens are at 1 and 4, giving a different structure from pyrimidine.

What material-related synthesis has been reported?

Suzuki coupling has produced pyrazine-linked triphenylamine derivatives.

Should dichloropyrazines be controlled?

Include them when they are relevant to the source route or could change the intended coupling outcome.

Technical sources
  1. Chloropyrazine C1093TCI
  2. 2,6-Dichloropyrazine processCN103288763A
  3. Palladium-catalyzed ligand-free and aqueous Suzuki reaction for the construction of (hetero)aryl-substituted triphenylamine derivativesRSC Advances