On August 31, 1981, Ferrarini, Pier Luigi; Biagi, Giuliana; Livi, Oreste; Primofiore, Giampaolo; Carpene, Marino published an article.Quality Control of 7-Chloro-2,3-dihydro-1,8-naphthyridin-4(1H)-one The title of the article was Synthesis of some 3-substituted [1,8]Naphthyrido[3,2-c][1,8]naphthyridines. A new heterocyclic ring system. And the article contained the following:
The title compounds (I; R = Me, Br, Cl, EtO, HS) were prepared by condensation of naphthyridinones (II) with 2-aminonicotinaldehyde. I were transformed into the fully aromatic compounds by refluxing with nitrobenzene. The experimental process involved the reaction of 7-Chloro-2,3-dihydro-1,8-naphthyridin-4(1H)-one(cas: 76629-10-2).Quality Control of 7-Chloro-2,3-dihydro-1,8-naphthyridin-4(1H)-one
The Article related to naphthyridonaphthyridine, condensation naphthyridinone aminonicotinaldehyde, Heterocyclic Compounds (More Than One Hetero Atom): Fused-Ring Systems With Two Or More Hetero Atoms, No More Than One Hetero Atom Per Ring and other aspects.Quality Control of 7-Chloro-2,3-dihydro-1,8-naphthyridin-4(1H)-one
Referemce:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem