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This review summarizes results of literature reports concerning tandem in situ generation and 1,5-electrocyclization of N-hetaryl nitrilimines reported by us and other research groups from 1960 to mid 2009. It outlines the utility of such reactions as facile synthetic strategy for synthesis of annulated triazoles and their acyclo C-nucleosides. Fused triazolo-azolo-triazines Pyrazolo[3,4-e][1,2,4]triazolo[3,4-c][1,2,4]triazines Reaction of aldehydedoi:10.3998/ark.5550190.0011.102 fatcat:q2vkj5mnurfmrg55225kspxizq