Novel synthesis of pyrazolo[5,1-c]-1,2,4-triazoles, imidazo[1,2-b]pyrazoles, and [1,2,4]-triazolo[4,3-a]benzimidazoles. Reaction of nitrite imines with amino- and oxo-substituted diazoles

Abstract

The behaviour of several amino- and hydroxy-diazoles towards nitrite imines and hydrazonoyl halides is reported. The results indicate that nitrite imines can add to the double bonds in amino- and hydroxy-heterocyclic derivatives. However, the nature of the end product is dependent on the nitrite imine, the substituent on the heterocyclic ring, and the type of heterocyclic ring.