Da Settimo, Antonio; Biagi, Giuliana; Primofiore, Giampaolo; Ferrarini, Pier Luigi; Livi, Oreste; Marini, Anna Maria published an article in 1980, the title of the article was Synthesis of some 3,7-disubstituted quino[3,2-c][1,8]naphthyridines.Application In Synthesis of 7-Chloro-2,3-dihydro-1,8-naphthyridin-4(1H)-one And the article contains the following content:
Quinonaphthyridines I (R = Me, Br, Cl, EtO, NH2; R1 = Me, Et; R2 = R3 = H) were prepared in 13-95% yields by cyclizing II with o-H2NC6H4COR1. Heating I (R2 = R3 = H) in PhNO2 gave I (R2R3 = bond). The experimental process involved the reaction of 7-Chloro-2,3-dihydro-1,8-naphthyridin-4(1H)-one(cas: 76629-10-2).Application In Synthesis of 7-Chloro-2,3-dihydro-1,8-naphthyridin-4(1H)-one
The Article related to quinonaphthyridine, naphthyridinone phenone cyclization, acetophenone naphthyridinone cyclization, benzophenone naphthyridinone cyclization, 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.Application In Synthesis of 7-Chloro-2,3-dihydro-1,8-naphthyridin-4(1H)-one
Referemce:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem