Transformations of Heterocyclic Amidines and Amide Oximes: Synthesis of s-Triazolopyrimidopyridazines, s-Triazolopyridazinoquinoline and 7H-2,3,4,6,7-Pentaazabenzanthracene, Derivatives of Novel Heterocyclic System

Article abstract of DOI:10.1055/s-1986-31787

3-Amino-4-cyano-5-phenylpyridazine (1) is transformed into the corresponding amidine 2, carboxamidrazone 3 and formamide oximes 7 and 13.These intermediates are cyclized to three novel heterocyclic systems: s-triazolo<1',5':1,6>pyrimido<4,5-c>pyridazines