Valera, Nestor S. et al. published their research in Polymer in 1981 | CAS: 322-46-3

Pyrido[2,3-b]pyrazine (cas: 322-46-3) belongs to pyrazine derivatives. Pyrazine heterocycles and their benzo derivatives possess many interesting properties, including chemical reactivity profiles, and have diverse applications in total synthesis, medicine, chemical biology, materials, dyes, and imaging. Substituted pyrazines have been found as subunits of multiple synthetically constructed therapeutic agents, as well as several natural products.SDS of cas: 322-46-3

Preparation of polystyryl-1,5-naphthyridine, polystyrylpyrido[2,3-b]pyrazine, and some of their copper(II) complexes was written by Valera, Nestor S.;Hendricker, David G.. And the article was included in Polymer in 1981.SDS of cas: 322-46-3 This article mentions the following:

Poly(styryl-1,5-naphthyridine) and poly(styrylpyrido[2,3-b]pyrazine) Cu (II) complexes were prepared by lithiation of brominated divinylbenzene-styrene copolymer, followed by addition of 1,5-naphthyridine or pyrido[2,3-b]pyrazine, resp. Cu(NO3)2 was added to the polystyryl compounds, and the resulting complexes were characterized by elemental anal. and IR. In the experiment, the researchers used many compounds, for example, Pyrido[2,3-b]pyrazine (cas: 322-46-3SDS of cas: 322-46-3).

Pyrido[2,3-b]pyrazine (cas: 322-46-3) belongs to pyrazine derivatives. Pyrazine heterocycles and their benzo derivatives possess many interesting properties, including chemical reactivity profiles, and have diverse applications in total synthesis, medicine, chemical biology, materials, dyes, and imaging. Substituted pyrazines have been found as subunits of multiple synthetically constructed therapeutic agents, as well as several natural products.SDS of cas: 322-46-3

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem