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Abstract
We report here a one-step synthesis of the bis-[1,2,4] oxadiazolino [4,5-b; 5,4-g] [1,2]-diazepines 3,5 and [1,2,4] triazolino [4,5-b]-pyrazolino [4,5-f] [1,2]-diazepine, 7 by 1,3-dipolar cycloaddition of nitrile oxides and nitrilimines with the 1,2-diazepine 1.