Ring-degenerate rearrangement of 5-amino-4-iminomethyl-1, 2, 3-triazoles

5-Amino-4-(substituted)iminomethyl-1-phenyl-1, 2, 3-triazoles 5 rearrange thermally to 4-amidino-substituted triazoles 6 instead of undergoing the Dimroth rearrangement to 5-anilinotriazoles 3 .