New syntheses of, heterocyclic compounds; trizafluorenes and azaphenazines from 4-chloro-3:5-dinitropyridine.
D006571:Heterocyclic Compounds; D011725:Pyridines
D006571:Heterocyclic Compounds; D011725:Pyridines
AZAFLUORENES; AZAPHENAZINES; PYRIDINES