Ring opening and cycloadditions of novel fused 1,2,4-triazines

Zsuzsanna Riedl, György Hajós, Péter Kövér, Gert Kollenz

Research output: Contribution to journalArticle

5 Citations (Scopus)


Ring opening of two ring transformation products of furo[2,3-e]pyrido[1,2- b][1,2,4]triazinium salt, i.e. a pyrrolo[2,3-e]pyrido[1,2-b][1,2,4]triazine derivative and a zwitterionic pyrido[1,2-b]-pyridazino[3,4-e][1,2,4]triazine compound has been investigated. The pyrrole-fused tricycle when reacted with some dienophiles resulted, unlike its zwitterionic pyridazine analogue, only in Michael addition and/or subsequent ring opening. Reaction of the methylated N-methylpyrrolo[2,3-e]pyrido[1,2-b][1,2,4]triazinium derivative and dimethyl pyrido[1,2-b]pyridazino[3,4-e][1,2,4]triazinium salt with secondary amines afforded new hetaryldienes which, in some cases, were successfully subjected to Diels-Alder reaction to give regular cycloadducts.

Original languageEnglish
Pages (from-to)62-68
Number of pages7
Issue number5
Publication statusPublished - Dec 1 2003



  • Cycloaddition
  • Fused 1,2,4-triazines
  • Hetaryldiene
  • Ring opening
  • Zwitterion

ASJC Scopus subject areas

  • Organic Chemistry

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