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1,2,4‐Triazoles. XX. Pyrolytic decomposition of ketone hydrazones derived from pyrid‐2‐ylhydrazine and related bases. Some further examples of the s ‐triazolo[4, 3‐α]pyrazine and s ‐triazolo[4, 3‐ a ]quinoxaline series
Author(s) -
Potts K. T.,
Schneller S. W.
Publication year - 1968
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570050408
Subject(s) - pyrazine , chemistry , quinoxaline , ketone , ring (chemistry) , decomposition , triazole , pyrolytic carbon , isomerization , medicinal chemistry , organic chemistry , pyrolysis , catalysis
Pyrolytic decomposition of ketone 2‐heterylhydrazones has been shown to be unsatisfactory for the preparation of fused s ‐triazole derivatives. The introduction of more diversified substituents into the s ‐triazolo[4, 3‐ a ]pyrazine and s ‐triazolo[4,3‐ a ]quinoxaline systems has been accomplished and some reactions and spectral characteristics of these ring systems are reported. Isomerization of the s ‐triazolo[4, 3‐ a ]pyrazine system to the s ‐triazolo[1,5‐ a ]pyrazine system is described.