Isomeric 6H,8H-naphthyridino-1,3-benzothiazin-8-ones

Lajos Fodor, David B. MacLean

Research output: Contribution to journalArticle

1 Citation (Scopus)


The synthesis of the ring system present in two of the four possible isomeric 6H,8H-naphthyridino-1,3-benzothiazineiss reported here for the first time. 2,3-Dimethoxy-6H,8H-[2,7]naphthyridino[2,3-c][,3]benzothiazin-8-one(5)and several related compounds have been prepared by both chemical and photochemical methods. 2,3-Dimethoxy-6H,8H-[I ,6]naphthyridino[6,7-c][1,3]benzothiazin-8-one (9) has been isolated in 15% yield along with 5 in 38% yield on irradiation of 6,7-dimethoxy-3-nicotinoyl-4-methylidene-2H-1,3-benzothiazine(8).

Original languageEnglish
Pages (from-to)636-638
Number of pages3
JournalCanadian Journal of Chemistry
Issue number3
Publication statusPublished - Mar 1 1987

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Organic Chemistry

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