Synthesis and ring transformation of a new fused as‐triazinium salt

Zs Juhász‐Riedl, Gy Hajós, G. Kollenz, A. Messmer

Research output: Contribution to journalArticle

21 Citations (Scopus)


The 1,2‐Diaminopyridinium salt 1 was treated with furandione 2 to give pyrido‐as‐triazinone 3, which could be cyclized to the tricyclic furo[2,3‐e]pyrido[1,2,‐b]‐as‐triazinium salt 5. Reaction of 5 with nucleophiles resulted in different types of products. Thus, aqueous base afforded bicyclic triazinone 4, methoxide ion or secondary amine led to stable zwitterions 7a, b, whereas ammonia and hydrazines resulted in ring transformation of the furan moiety, and gave new fused tricyclic pyrroles (10, 11) and pyridazines (13, 14), respectively.

Original languageEnglish
Pages (from-to)1935-1938
Number of pages4
JournalChemische Berichte
Issue number10
Publication statusPublished - Jan 1 1989


  • Ring transformation
  • Solvatochromy, negative
  • Zwitterion
  • as‐Triazinium salt, fused

ASJC Scopus subject areas

  • Chemistry(all)

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