A Coupling Reaction of 4-Amino-5-mercapto- 3-substituted-1,2,4-triazoles to Generate Symmetrically Substituted Hydrazines

A novel coupling reaction of 4-amino-5-mercapto-3-substituted-1,2,4-triazoles to generate symmetrically substituted hydrazines, N,N′-bis(5-mercapto-3-substituted-1,2,4-triazol-4-yl)hydrazines was unexpectedly observed. Five examples are presented to demonstrate this reaction. All isolated products were unambiguously characterized.