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Cyanoamino Compounds in Synthesis Syntheses of Some Heterocycles
Vercek, Bojan,Ogorevc, Bozidar,,Stanovnik, Branko,Tisler, Miha
, p. 789 - 798 (2007/10/02)
Transformations of some heterocyclic cyanoamino compounds leading to various heterocyclic systems are described. s-Triazolo(1,5-a)azines are obtained either in a direct synthetic approach or via the substituted aminotetrazoles, substituted 3-amino-5-oxo-1,2,4-oxadiazolines, and from N-ethoxycarbonyl N'-heteroaryl thioureas or N-heteroaryl N'-hydroxyguanidine.The cyanoamino group reacts also with o-difunctional benzenes to give the corresponding substituted derivatives of benzimidazole, benzoxazole or benzothiazole. - Keywords: Cyclization with N-N bond formation; Heterocyclic compounds; Rearrangements
